Daihatsu SIRION M300 Service Manual (No.9890) – ENGINE CONTROL SYSTEM

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1KR ---------------------------------------------------- B8 - 1

ENGINE CONTROL COMPUTER--------- B8 - 1

REMOVAL AND INSTALLATION-------- B8 - 1

ENGINE REVOLUTION SENSOR -------- B8 - 3

REMOVAL AND INSTALLATION-------- B8 - 3

CAMSHAFT POSITION SENSOR--------- B8 - 4

REMOVAL AND INSTALLATION-------- B8 - 4

KNOCK SENSOR------------------------------ B8 - 5

REMOVAL AND INSTALLATION-------- B8 - 5 ENGINE COOLANT TEMPERATURE SENSOR ----------------------------------------- B8 - 7

REMOVAL AND INSTALLATION-------- B8 - 7 OIL CONTROL VALVE ----------------------- B8 - 9

REMOVAL AND INSTALLATION-------- B8 - 9 ENGINE CONTROL SYSTEM ------------ B8 - 11

ARTICLES TO BE PREPARED-------- B8 - 11

HANDLING INSTRUCTIONS OF

CONTROL SYSTEM---------------------- B8 - 13

SYSTEM WIRING DIAGRAM ---------- B8 - 15

ARRANGEMENT OF VEHICLE

HARNESS SIDE CONNECTOR

TERMINALS -------------------------------- B8 - 17

LOCATION OF COMPONENTS------- B8 - 21

HOW TO PROCEED WITH TROUBLE

SHOOTING --------------------------------- B8 - 23

INQUIRY ------------------------------------- B8 - 31

CONFIRMATION, RECORD AND

ERASURE OF DIAGNOSIS CODE--- B8 - 33

SYMPTOM CONFIRMATION ---------- B8 - 38

BASIC CHECK ----------------------------- B8 - 40

TROUBLE SHOOTING ACCORDING

TO MALFUNCTION PHENOMENA -- B8 - 57

TROUBLE SHOOTING ACCORDING

TO DIAGNOSIS CODE ------------------ B8 - 62

TROUBLE SHOOTING ACCORDING

TO SYSTEM ------------------------------ B8 - 199

UNIT CHECK ----------------------------- B8 - 218

ECU INPUT/OUTPUT SIGNAL CHECK

------------------------------------------------ B8 - 226

K3 --------------------------------------------------- B8 - 230

ENGINE CONTROL COMPUTER ----- B8 - 230

REMOVAL AND INSTALLATION ---- B8 - 230 ENGINE REVOLUTION SENSOR ----- B8 - 230

REMOVAL AND INSTALLATION ---- B8 - 230 CAMSHAFT POSITION SENSOR ----- B8 - 231

REMOVAL AND INSTALLATION ---- B8 - 231 KNOCK SENSOR -------------------------- B8 - 232

REMOVAL AND INSTALLATION ---- B8 - 232 ENGINE COOLANT TEMPERATURE SENSOR -------------------------------------- B8 - 234

REMOVAL AND INSTALLATION ---- B8 - 234

INTAKE AIR TEMPERATURE SENSOR -------------------------------------- B8 - 235 REMOVAL AND INSTALLATION ------- B8 - 235 MANIFOLD ABSOLUTE PRESSURE SENSOR -------------------------------------- B8 - 236

REMOVAL AND INSTALLATION ---- B8 - 236

OIL CONTROL VALVE -------------------- B8 - 237

REMOVAL AND INSTALLATION ---- B8 - 237

ENGINE CONTROL SYSTEM ---------- B8 - 239

ARTICLES TO BE PREPARED ------ B8 - 239 HANDLING INSTRUCTIONS OF CONTROL SYSTEM -------------------- B8 - 241 SYSTEM WIRING DIAGRAM -------- B8 - 243 ARRANGEMENT OF VEHICLE HARNESS SIDE CONNECTOR TERMINALS------------------------------- B8 - 245 LOCATION OF COMPONENTS ----- B8 - 249 HOW TO PROCEED WITH TROUBLE SHOOTING-------------------------------- B8 - 251 INQUIRY ----------------------------------- B8 - 259 CONFIRMATION, RECORD AND ERASURE OF DIAGNOSIS CODE - B8 - 261 SYMPTOM CONFIRMATION--------- B8 - 267 BASIC CHECK --------------------------- B8 - 269 TROUBLE SHOOTING ACCORDING TO MALFUNCTION PHENOMENA- B8 - 286 TROUBLE SHOOTING ACCORDING TO DIAGNOSIS CODE----------------- B8 - 291 TROUBLE SHOOTING ACCORDING TO SYSTEM ------------------------------ B8 - 446 UNIT CHECK ----------------------------- B8 - 467 ECU INPUT/OUTPUT SIGNAL CHECK

------------------------------------------------ B8 - 475

B8 ENGINE CONTROL SYSTEM

TO INDEX

ÄÄ

1KR

1 ENGINE CONTROL COMPUTER

1-1 REMOVAL AND INSTALLATION

1-1-1 OPERATION BEFORE REMOVAL

1.Disconnect the negative (-) terminal of the battery.

2.Remove the No.1 instrument panel under cover.

3.Remove the fuse box opening cover and lower instrument cover.

NOTE

• There are bolts fixing the EFI ECU in the back of the removed cover.

4.Remove the connector of the fuel injection computer Ay.

1-1-2 REMOVAL AND INSTALLATION PROCEDURES (1) Components

(2) Removeal and installation procedures

1 a Bracket, computer

i 2 b Computer Ay, fuel injection

T11E6070S20

B8–1

T11E6560T10

1-1-3 POINTS OF INSTALLATION (1) Computer Ay, fuel injection

1.Decide the installation position of the fuel injection computer Ay with the temporary maintaining clip on the vehicle side and install the bolts.

1-1-4 OPERATION AFTER INSTALLATION

1.Connect the connector to the fuel injection computer Ay.

2.Install the fuse box opening cover and lower instrument cover.

3.Install the No.1 instrument panel under cover.

4.Connect the negative (-) terminal of the battery.

B8–2

T11E6095ET10

Front

2 ENGINE REVOLUTION SENSOR

2-1 REMOVAL AND INSTALLATION

2-1-1 ARTICLES TO BE PREPARED

Instrument

Lubricant,adhesive,others

2-1-2 OPERATION BEFORE REMOVAL

1.Disconnect the negative (-) terminal of the battery.

2.Remove the connector of the crank position sensor Ay.

2-1-3 REMOVAL AND INSTALLATION PROCEDURES (1) Components

k:Engine oil Unit: N;m{kgf;cm}

(2) Removeal and installation procedures

2-1-4 POINTS OF INSTALLATION (1) Sensor Ay, crank position

1.Apply engine oil to the O-ring of the sensor Ay.

LUBRICANT: Engine oil

2-1-5 OPERATION AFTER INSTALLATION

1.Connect the connector of the crank position sensor Ay.

2.Connect the negative (-) terminal of the battery.

i 1 a Sensor Ay, crank position

T11E6071S20

T:7.5&2.2 {76&22}

Engine oil

Torque wrench

B8–3

3 CAMSHAFT POSITION SENSOR

3-1 REMOVAL AND INSTALLATION

3-1-1 ARTICLES TO BE PREPARED

Instrument

Lubricant,adhesive,others

3-1-2 OPERATION BEFORE REMOVAL

1.Disconnect the negative (-) terminal of the battery.

2.Remove the connector of the cam position sensor Ay.

3-1-3 REMOVAL AND INSTALLATION PROCEDURES (1) Components

k:Engine oil Unit: N;m{kgf;cm}

(2) Removeal and installation procedures

3-1-4 POINTS OF INSTALLATION (1) Sensor Ay, cam position

1.Apply engine oil to the O-ring of the sensor Ay.

LUBRICANT: Engine oil

3-1-5 OPERATION AFTER INSTALLATION

1.Connect the connector of the cam position sensor Ay.

2.Connect the negative (-) terminal of the battery.

i 1 a Sensor Ay, cam position

T11E6073S20

T:7.5&2.2 {76&22}

Engine oil

Torque wrench

B8–4

4 KNOCK SENSOR

4-1 REMOVAL AND INSTALLATION

4-1-1 ARTICLES TO BE PREPARED

Instrument

4-1-2 OPERATION BEFORE REMOVAL

1.Disconnect the negative (-) terminal of the battery.

2.Remove the intake manifold Ay.

Refer to Page B3-5.

3.Remove the knock control sensor.

4-1-3 REMOVAL AND INSTALLATION PROCEDURES (1) Components

Unit:N;m{kgf;cm}

(2) Removeal and installation procedures

4-1-4 POINTS OF INSTALLATION (1) Sensor, knock control

1.When installing the sensor to the engine Ay, install within the position shown in the figure.

i 1 a Sensor, knock control

T11E6075S20

T:20.0&5.0 {204&50}

Torque wrench

B8–5

22.5$&22.5$

Upper

T11E6091ET10

4-1-5 OPERATION AFTER INSTALLATION

1.Connect the connector of the knock control sensor.

2.Install the intake manifold Ay.

Refer to Page B3-5.

3.Connect the negative (-) terminal of the battery.

B8–6

5 ENGINE COOLANT TEMPERATURE SENSOR

5-1 REMOVAL AND INSTALLATION

5-1-1 ARTICLES TO BE PREPARED

Instrument

5-1-2 OPERATION BEFORE REMOVAL

1.Disconnect the negative (-) terminal of the battery.

2.Drain the cooling water.

NOTE

• Drain some amount of coolant from the water inlet so that it would not leak.

3.Remove the No.1 radiator hose (Engine side).

4.Remove water inlet.

Refer to Page B6-1.

5.Remove the connector of the water temperature sensor.

5-1-3 REMOVAL AND INSTALLATION PROCEDURES (1) Components

~: Non-reusable parts Unit: N;m {kgf;cm}

(2) Removeal and installation procedures

1 a Sensor, water temperature

2 b Gasket

T:19.6&3.9 {200&39}

T11E6077S20

Torque wrench

B8–7

5-1-4 OPERATION AFTER INSTALLATION

1.Connect the connector of the water temperature sensor.

2.Install the No.1 radiator hose (Engine side).

3.Install the water inlet.

Refer to Page B6-1.

4.Fill cooling water.

5.Connect the negative (-) terminal of the battery.

6.Start the engine and perform air-bleeding of the coolant.

7.Stop the engine and check for coolant leakage.

B8–8

6 OIL CONTROL VALVE

6-1 REMOVAL AND INSTALLATION

6-1-1 ARTICLES TO BE PREPARED

Instrument

Lubricant,adhesive,others

6-1-2 OPERATION BEFORE REMOVAL

1.Disconnect the negative (-) terminal of the battery.

2.Remove the air cleaner case S/A.

Refer to Page B3-1.

3.Remove the ventilation hose Ay.

4.Remove the connector of the cam timing oil control valve Ay.

6-1-3 REMOVAL AND INSTALLATION PROCEDURES (1) Components

k:Engine oil Unit: N;m{kgf;cm}

(2) Removeal and installation procedures

6-1-4 POINTS OF INSTALLATION (1) Cam timing oil control valve Ay

1.Apply engine oil to the O-ring of the valve Ay.

LUBRICANT: Engine oil

i 1 a Cam timing oil control valve Ay

T11E6081S20

T:10.0&3.0 {102&32}

Engine oil

Torque wrench

B8–9

6-1-5 OPERATION AFTER INSTALLATION

1.Connect the connector of the cam timing oil control valve Ay.

2.Install the ventilation hose Ay.

3.Install the air cleaner case S/A.

Refer to Page B3-1.

4.Connect the negative (-) terminal of the battery.

B8–10

7 ENGINE CONTROL SYSTEM

7-1 ARTICLES TO BE PREPARED

SST

Shape Part No. Part name

09842-97209-000 Sub-harness,EFI computer check

09268-41047-000

(09268-41045-000)

Tool set,injection measuring

09842-30070-000 Wire,EFI inspection

09991-87402-000 Wire,tacho-pulse pick up

09991-87403-000 Wire,diagnosis check

09991-87404-000

(09991-87401-000)

Wire,engine control system inspection

09991-87301-000 Set,Diagnosis tester

09965-97230-000

(09965-97207-000)

Trouble-Shooting program card

09268-87701-000 Gauge,EFI fuel pressure

09268-87702-000 Tool set,measuring

B8–11

Instrument

WARNING

• If the vehicle is driven with the SST (EFI computer check sub harness, etc.) connected there is a possibility of causing malfunction and may be very dangerous. Therefore, remove it without fail before running.

Tachometer,Timing light,Compression gauge,Sound scope,Electrical Tester,Oscillo scope

B8–12

7-2 HANDLING INSTRUCTIONS OF CONTROL SYSTEM

7-2-1 INSTRUCTIONS ON USE OF THIS SERVICE MANUAL

1.This service manual has been compiled in such a way that the manual may be used both in regions where the type certification is implemented based on the EU exhaust emission approval, and other regions.

2.Hence, with regard to the assignment, reading, erasing of diagnostic trouble codes and those steps of checks, repairs and confirmation, the service manual contains the procedures for both cases: One is a procedure that uses the diagnosis tester (DS-21/DS-@) or the OBD @ generic scan tool, and the other is a procedure that does not use this tester or tool. Therefore, the following instructions given below must be observed.

3.About Use of diagnosis tester (DS-21/DS-@) or OBD @ Generic Scan Tool (1) Regions where type certification is implemented based on EC exhaust emission approval: Make

sure to use the diagnosis tester (DS-21/DS-@) or the OBD @ generic scan tool.

(2) Other regions: You may use or not use the diagnosis tester (DS-21/DS-@) or the OBD @ generic

scan tool. You may perform the operation, employing whichever method that will be easier to you.

4.Instructions to be followed concerning Diagnosis Trouble Codes Diagnosis trouble codes, such as P0105/31 (Four-digit code/two-digit code) are posted additionally. (1) Regions where type certification is implemented based on EC exhaust emission approval

Make sure to use only four-digit trouble codes (E.G.P0105) whose have been assigned according to the ISO regulations.

(2) Other regions:

You may perform the operation using the four-digit code, employing the diagnosis tester (DS21/DS-@) or the OBD @ generic scan tool. Or you may perform the operation using the two-digit codes (E.G.31), without the use of the tester or tool. You may perform the operation, employing whichever method that will be easier to you. Or you may perform the operation using the two-digit codes (E.G.31), without the use of the tester or tool. You may perform the operation, employing whichever method that will be easier to you.

NOTE

• The OBD @ generic scan tool means a scan tool complying with the ISO 14230 (KWP2000) format.

• In cases where the OBD @ generic scan tool is employed, not all diagnostic trouble codes (Four-

digit codes) can be read out. It should be noted that only those diagnostic trouble codes in which "zero" follows after "P", for example, P0XXX, can be read out.

• The accuracy of the two-digit codes in diagnosing malfunctioning components is slightly inferior to that of the four-digit codes.

• Hereinafter, those regions where the type certification is implemented based on the EU exhaust emission approval, is referred to as the "EU specifications".

B8–13

7-2-2 PRECAUTIONARY MEASURES DURING TROUBLE-SHOOTING

1.Before the diagnosis information memorized in the EFI ECU memory is confirmed, never disconnect the connector from the EFI ECU, the battery negative (-) terminal, the EFI ECU earth wire from the engine, or the main fuse.

2.The diagnosis information memorized in the EFI ECU memory can be erased by using the diagnosis tester (DS-21/DS-@) or the OBD-II generic scan tool in the same way as the check. Therefore, before using the tester, read its instruction manual so as to understand the functions furnished and how to use it.

3.Priority in trouble-shooting (1) If the priority in trouble-shooting for a number of diagnostic trouble codes is given in the concerned

DTC flow chart, make sure to follow the priority.

(2) If not given, follow the priority given below and perform the trouble-shooting for each diagnostic

trouble code (DTC). (1) DTC other than DTC P0171/25, DTC P0172/26 (Too lean/too rich in fuel system), and DTC 0300/17, DTC P0301-P0303/17 (Misfire found) (2) DTC P0171/25, DTC P0172/26 (Too lean/too rich in fuel system) (3) DTC 0300/17, DTC P0301-P0304/17 (Misfire found)

B8–14

7-3 SYSTEM WIRING DIAGRAM

7-3-1 FOR EU SPECIFICATIONS

T11E6501ES45

ACC

ACCOFF

IG1IGIG2

EFI

15A

Alternator

(CAN communication) to ABS ECU

BAT

MRO

FC1

#10

FAN1

MGC

RHD vehicles

E21

E01

THW

OX1

N1(

N1'

EFI T

DLC

113

12520

VTH

To A

123

OXH1

REV

12859

38 27

35 24

OCV'

OCV(

#20

#30

PRG

KNK

121

ECU IG2

7.5A

MGC

10A

IG1/

BACK

7.5A

N2(

N2'

12758

116

118

STP

DEF

BLW

ACEV

ACSW

135

ALT

LCAN

HCAN

CANL

CANH

FPOF

EPS ECU

EPS

Immobilizer ECU

SIO2

117

AM1

AM2

F/L

SIO1

119

IGSW

120

Manifold absolute pressure, intake air temperature integral type sensor

VCPM THA

E2PM

122 55

PIM

Stepper motor for ISC

IACAHI

67 68 69

IACALO IACBLO

IACBHI

Stepper motor type EGR valve

EGR3

131 133 130

EGR2 EGR1

132

EGR4

Battery

Body ground

Engine ground

Ignition switch

Starter

Engine

10A

Main relay

F/P motor

F/P relay

Injector

Radiator fan relay

Radiator fan motor

To A/C control system

Water temperature sensor

Throttle position sensor

Front oxygen sensor

Rear oxygen sensor

Oxygen sensor heater

OX2

OXH2

Oxygen sensor heater

Engine revolution sensor

To A

Oil control valve

VSV for evaporative emission control system purge control

MIL

Knock sensor

Radiator fan

30A

Ignition coil 1

Ignition coil 2

Ignition coil 3

A/C illumination related system

For details, refer to the wiring

diagrams.

To other ECU

Cam angle sensor

Airbag ECU

To Spark

plug

Magnetic clutch relay

Tachometer

(CAN communication) to meter to DLC

Condenser

RHD vehicles

Compressor magnetic clutch

Engine control computer

(CAN communication) to Meter to ABS ECU

LHD vehicles

LCAN

HCAN

CANL

CANH

to DLC

IG2

ICMB1

ICMB3

IG1

IG3

ICMB2

B8–15

7-3-2 FOR GENERAL SPECIFICATIONS

T11E6502ES45

ACC

ACCOFF

IG1IGIG2

EFI

15A

Alternator

(CAN communication) to ABS ECU

IG1

IG2 BAT

MRO

FC1

#10

FAN1

MGC

RHD vehicles

E21

E01

THW

OX1

N1(

N1'

EFI T

DLC

113

12520

VTH

To A

123

OXH1

REV

12859

63 38 27

35 24

OCV'

OCV(

#20

#30

PRG

166162

IG3

KNK

121

ECU IG2

7.5A

MGC

10A

IG1/

BACK

7.5A

N2(

N2'

12758

116

118

STP

DEF

BLW

ACEV

ACSW

135

ALT

LCAN

HCAN

CANL

CANH

FPOF

EPS

AM1

AM2

F/L

SIO1

119

IGSW

120

Manifold absolute pressure, intake air temperature integral type sensor

VCPM THA

E2PM

122 55

PIM

Stepper motor for ISC

IACAHI

67 68 69

IACALO IACBLO

IACBHI

Stepper motor type EGR valve

EGR3

131 133 130

EGR2 EGR1

132

EGR4

Battery

Body ground

Engine ground

Ignition switch

Starter

Engine

10A

Main relay

F/P motor

F/P relay

Injector

Radiator fan relay

Radiator fan motor

To A/C control system

Water temperature sensor

Throttle position sensor

Front oxygen sensor

Oxygen sensor heater

Engine revolution sensor

To A

Oil control valve

VSV for evaporative emission control system purge control

MIL

Knock sensor

Radiator fan

30A

Ignition coil 1

Ignition coil 2

Ignition coil 3

A/C illumination related system

For details, refer to the wiring

diagrams.

To other ECU

Cam angle sensor

Airbag ECU

EPS ECU

To Spark

plug

Magnetic clutch relay

Tachometer

(CAN communication) to meter to DLC

Condenser

Compressor magnetic clutch

Engine control computer

(CAN communication) to Meter to ABS ECU

LHD vehicles

LCAN

HCAN

CANL

CANH

to DLC

B8–16

7-4 ARRANGEMENT OF VEHICLE HARNESS SIDE CONNECTOR TERMINALS

(1) For EU specifications

Terminal

No.

Terminal

code

Terminal name

Terminal

No.

Terminal

code

Terminal name

1 (( 31 (( 2 (( 32 PBSW Brake negative pressure switch 3 ACSW Air conditioner switch 33 (( 4 (( 34 (( 5 (( 35 FC1 Fuel pump relay driving 6 CANL CAN communication LO (1) 36 MGC Magnetic clutch relay driving 7 CANH CAN communication HI (1) 37 FAN1 Radiator fan relay driving 8 LCAN CAN communication LO (2) 38 BAT Backup power supply 9 HCAN CAN communication HI (2) 39 MRO Main relay driving

10 (( 40 (( 11 DEF Defogger signal 41 (( 12 EPS EPS ECU 42 BLW Heater blower signal 13 W Engine check lamp 43 STP Stop lamp signal 14 OXH2 Rear oxygen sensor heater 44 FPOF Airbag fuel pump OFF request signal

15 OXH1 Front oxygen sensor heater 45 ACEV

Air conditioner evaporator temperature sensor

16 PRG

VSV for evaporative emission control system purge control

46 ((

17 (( 47 (( 18 OX2 Rear oxygen sensor signal 48 ((

19 E2 Sensor system earth 49 ICMB3

Ion current combustion control signal (#3)

20 E01 Power system earth 50 ICMB2

Ion current combustion control signal (#2)

21 (( 51 ICMB1

Ion current combustion control signal

(#1) 22 #30 Injector (#3) 52 PIM Manifold absolute pressure sensor 23 #20 Injector (#2) 53 VTH Throttle position sensor 24 #10 Injector (#1) 54 THW Engine water temperature sensor 25 OCV( Oil control valve driving (') 55 THA Intake air temperature sensor 26 OCV' Oil control valve driving (') 56 VC Sensor power supply

27 'B EFI ECU power supply 57 VCPM

Sensor power supply (Exclusively for

manifold absolute pressure sensor) 28 (( 58 N2' Cam angle sensor(') 29 (( 59 N1' Engine revolution sensor(') 30 (( 60 ((

H11E6091S10

28293031323334353637

7071727374757677

107108109110111112

56721

60616263646566676869

979899

100101102105106

129

130133134135

222324252627

103104

131

132

383940414243444546

7879808182838687

113114118119

8910111213

8485

115116117

120

495051525354555657

89909192

121122

141516171819

9394

123124125126

127

128

B8–17

B8–18

222324252627

103104

100101102105106

131

130133134135

132

60616263646566676869

979899

129

128

127

9394

141516171819

495051525354555657

89909192

120

121122

123124125126

8485

8910111213

383940414243444546

7879808182838687

113114118119

115116117

56721

28293031323334353637

7071727374757677

107108109110111112

H11E6091S10

Terminal

No.

Terminal

code

61 IG3 Ignition coil (#3) 99 (( 62 IG2 Ignition coil (#2) 100 (( 63 IG1 Ignition coil (#1) 101 (( 64 (( 102 (( 65 (( 103 (( 66 IACALO Stepper motor 1 for ISC 104 (( 67 IACAHI Stepper motor 2 for ISC 105 (( 68 IACBLO Stepper motor 3 for ISC 106 (( 69 IACBHI Stepper motor 4 for ISC 107 STSW Starter switch 70 (( 108 (( 71 (( 109 (( 72 (( 110 (( 73 (( 111 (( 74 (( 112 (( 75 (( 113 EFI T EFI-T check terminal 76 (( 114 (( 77 (( 115 (( 78 (( 116 E21 Body sensor earth 79 (( 117 SIO2 Immobilizer communication

80 (( 118 REV DLC (REV terminal) 81 (( 119 SIO1 DLC (Diagnostic device) 82 (( 120 IGSW Ignition switch 83 (( 121 KNK Knock sensor

84 (( 122 E2PM

85 (( 123 OX1 Front oxygen sensor 86 (( 124 (( 87 (( 125 E1 Calculation system earth 88 (( 126 (( 89 (( 127 N2( Cam angle sensor(() 90 (( 128 N1( Engine revolution sensor(() 91 (( 129 (( 92 (( 130 EGR4 Stepper motor type EGR valve 4 93 (( 131 EGR3 Stepper motor type EGR valve 3 94 (( 132 EGR2 Stepper motor type EGR valve 2 95 (( 133 EGR1 Stepper motor type EGR valve 1 96 (( 134 ALTC Alternator voltage control output 97 (( 135 ALT Alternator cut control output 98 ((

Terminal name

Terminal

No.

Terminal

code

Terminal name

Sensor earth (Exclusively for manifold absolute pressure sensor)

(2) For general specifications

Terminal

No.

Terminal

code

Terminal name

Terminal

No.

Terminal

code

Terminal name

10 (( 40 (( 11 DEF Defogger signal 41 (( 12 EPS EPS ECU 42 BLW Heater blower signal 13 W Engine check lamp 43 STP Stop lamp signal 14 (( 44 FPOF Airbag fuel pump OFF request signal

15 OXH1 Front oxygen sensor heater 45 ACEV

Air conditioner evaporator temperature

sensor

16 PRG

VSV for evaporative emission control system purge control

46 ((

17 (( 47 (( 18 (( 48 (( 19 E2 Sensor system earth 49 (( 20 E01 Power system earth 50 (( 21 (( 51 (( 22 #30 Injector (#3) 52 PIM Manifold absolute pressure sensor 23 #20 Injector (#2) 53 VTH Throttle position sensor 24 #10 Injector (#1) 54 THW Engine water temperature sensor 25 OCV( Oil control valve driving (() 55 THA Intake air temperature sensor 26 OCV' 56 VC Sensor power supply

27 'B EFI ECU power supply 57 VCPM

Sensor power supply (Exclusively for

manifold absolute pressure sensor) 28 (( 58 N2' Cam angle sensor(') 29 (( 59 N1' Engine revolution sensor(') 30 (( 60 ((

H11E6091S10

28293031323334353637

7071727374757677

107108109110111112

56721

60616263646566676869

979899

100101102105106

129

130133134135

222324252627

103104

131

132

383940414243444546

7879808182838687

113114118119

8910111213

8485

115116117

120

495051525354555657

89909192

121122

141516171819

9394

123124125126

127

128

B8–19

B8–20

222324252627

103104

100101102105106

131

130133134135

132

60616263646566676869

979899

129

128

127

9394

141516171819

495051525354555657

89909192

120

121122

123124125126

8485

8910111213

383940414243444546

7879808182838687

113114118119

115116117

56721

28293031323334353637

7071727374757677

107108109110111112

H11E6091S10

Terminal

No.

Terminal

code

80 (( 118 REV DLC (REV terminal) 81 (( 119 SIO1 DLC (Diagnostic device) 82 (( 120 IGSW Ignition switch 83 (( 121 KNK Knock sensor

84 (( 122 E2PM

85 (( 123 OX1 Oxygen sensor 86 (( 124 PST Hydraulic power steering switch 87 (( 125 E1 Calculation system earth 88 (( 126 (( 89 (( 127 N2( Cam angle sensor(() 90 (( 128 N1( Engine revolution sensor(() 91 (( 129 (( 92 (( 130 EGR4 Stepper motor type EGR valve 4 93 (( 131 EGR3 Stepper motor type EGR valve 3 94 (( 132 EGR2 Stepper motor type EGR valve 2 95 (( 133 EGR1 Stepper motor type EGR valve 1 96 (( 134 ALTC Alternator voltage control output 97 (( 135 ALT Alternator cut control output 98 ((

Terminal name

Terminal

No.

Terminal

code

Terminal name

Sensor earth (Exclusively for manifold absolute pressure sensor)

7-5 LOCATION OF COMPONENTS

T11E6505S30

B8–21

Part name

B8–22

a Fuel pump b Engine control computer c ABS actuator d Relay block e Manifold absolute pressure/ intake air temperature integral type sensor

f VSV for evaporative emission control system purge control g Stepper motor type EGR valve h Knock sensor

i Injector

j Cam angle sensor k Rear oxygen sensor

l Engine water temperature sensor

m Oxygen sensor

n Engine revolution sensor o Oil control valve p Ignition coil q Brake negative pressure switch

r Stepper motor for ISC s Throttle position sensor

t Combination meter u DLC

7-6 HOW TO PROCEED WITH TROUBLE SHOOTING

7-6-1 GENERAL INFORMATION

1.The engine and engine control system of this vehicle are controlled by the EFI ECU. Furthermore, the vehicle is provided with the on-board diagnosis system. Therefore, when any abnormality takes place in the input/output systems (Sensors, actuators, harnesses, connectors, etc.) of the engine control system, the EFI ECU memorizes the system concerned and informs the driver by making the malfunction indicator lamp (MIL) illuminate or flash.

2.Also the malfunction is informed to the operator by means of the malfunction indicator lamp (MIL). When trouble-shooting the engine, it is imperative for you to get the general idea of the onboard diagnostic system, and fully understand the precautionary measures in trouble-shooting, the items diagnostic system, and fully understand the precautionary measures in trouble-shooting, the items to be observed and how to use testers.

3.Then, conduct the trouble-shooting following the flow chart that indicates the correct procedure for the engine troubleshooting.

(1) On-board diagnostic system of vehicles for EU specifications

1.The vehicles for Europe have the following functions that comply with the 1999/102/EC (Generally called Euro-OBD) standards.

2.When the ignition switch is turned "ON", the malfunction indicator lamp (MIL) goes on. When no malfunction has been detected, the lamp will go out after the engine has started. (Check for a blown bulb)

3.While the engine is running, if the EFI ECU detects any malfunction in the emission control system/components that will affect the emissions from the vehicle, or in the power train control components, or if any malfunction is detected in the EFI ECU itself, the EFI ECU illuminates or flashes the MIL (Only when misfire is detected which will damage the catalyst). Then, the EFI ECU memorizes the malfunction area. (DTC by ISO15031-6/SAEJ2012)

4. If that malfunction will not occur in three successive running, the MIL is automatically turned off. However, the DTC will be recorded in the EFI ECU memory.

NOTE

• The MIL is illuminated only by the malfunction that affects the emissions from the vehicle. (Only items bearing a circle ("<" mark) in the MIL column.)

5.It is possible to read out various data from the engine ECU

by connecting the OBD @ generic scan tool which complies with the ISO 14230 format or diagnosis tester (DS21/DS-@) to the DLC of the vehicle. You can perform trouble-shooting efficiently by checking these data (DTC, freeze-frame data, current data, oxygen sensor monitor data, etc.).

6.The DTC is composed of the ISO standard code (Specified by ISO 15031-6) and the manufacturer's designation code. The ISO standard code should be set pursuant to the ISO. On the other hand, the manufacturer's designation code can be freely set forth by the manufacturer within a specified limit.

B8–23

DTC No.

Manifold pressure pressure

Intake air malfunction

Engine co malfunction

Throttle/P switch 8A8

Engine coo circuit mance

Malfunction

evaluation method

MIL

1 trip

2 trip

1 trip

P0105/31

P0110/43

P0115/42

P0116/42

P0120/41

L21E3706ET10

Diagnostic trouble code

B:Body C:Chassis P:Power train U:Net work

0:Regulation 1:Maker

Designation trouble code

Vehicle’s system

P0116(Power train)

1 & 2:Fuel and air metering 3 :Ignition system or misfire

7 & 8:Transmission

L21E3708ET10

7.Many DTC have a two trip detection logic which assures avoidance of wrong detection and functions only when a malfunction is surely occurring. However, another diagnosis mode is provided, in which only a one-time final confirmation test is necessary for a service mechanic to confirm that the malfunction has been completely remedied after the repair.

(1) In case DS-21 or OBD @ generic scan tool, the

"Continuous monitoring results" of "Vehicle communication in CARB mode" must be selected.

(2) In the case of the DS-II diagnosis tester, select the

"Pending"of "DTC" in CARB mode.

8.When a malfunction is detected, the engine and running conditions at that moment are memorized as a freezeframe data in the EFI ECU memory.

9.Two trip detection logic

When a malfunction is detected for the first time, that malfunction is temporarily memorized in the engine ECU memory. (First running). If the same malfunction is detected again during the second running, the MIL is illuminated and the DTC is determined. (Second running). (However, the ignition switch should be turned off between the first running and the second running.)

(2) On-board diagnostic system of vehicles for other regions

1.When the ignition switch is turned "ON", the MIL goes on. When no malfunction has been detected, the lamp will go out after the engine has started. (Check for a blown bulb) While the engine is running, if the ECU detects any malfunction in the engine control system/components, or if any malfunction is detected in the EFI ECU itself, the EFI ECU illuminates the MIL.

B8–24

DTC No.

Oxygen sensor malfunction

Fuel trim (Air-fuel malfunction

Malfunction

evaluation method

MIL

2 trip

P0141/24

P0171/25

P0172/26

L21E3709ET10

Vehicle communication

Indication of malfunction code Erasing of malfunction code Data display for freeze frame data Indication of current data Front O

2 sensor test results

Rear O

2 sensor test results

Continuous monitoring results

Mode 01

select function

L21E3710ET10

T11E6570T16

Function View System Bar Help

EFI / DTC

Current DTC

Current

DTC

Data

List

View Utility

Active

Test

Pending History Clear

2.In addition to the illumination of the MIL, the corresponding diagnostic trouble code (DTC) is memorized in the engine ECU memory. When the malfunction has been remedied or the system returns to its normal state, the MIL automatically goes out. However, the DTC remains memorized in the engine ECU memory.

3.It is possible to read out various data from the engine ECU by connecting the diagnosis tester (DS-21/DS-@) to the DLC of the vehicle. You can perform trouble-shooting accurately and efficiently by checking these data (DTC, freeze-frame data, current data, oxygen sensor monitor data, etc). Only when diagnosis tester (DS-21/DS-@) is used.

4.The DTC (Diagnostic trouble code) is set to a four-digit code in accordance with ISO standard. Furthermore, the conventional two-digit code is also provided. The fourdigit code can be read out by the diagnosis tester (DS21/DS-@). The two-digit code has been set forth by the DMC itself. This code can be read by observing the flashing pattern of the MIL.

5.Some DTC have a two trip detection logic which assures avoidance of wrong detection and functions only when a malfunction is surely taking place.

6.When a malfunction is detected, the engine and running conditions at that moment are memorized as a freezeframe data in the EFI ECU memory.

7.Two trip detection logic When a malfunction is initially detected, that malfunction is temporarily memorized in the engine ECU memory. (First running) If the same malfunction is detected again during the second running, the MIL is illuminated and the DTC is determined. (Second running) (However, the ignition switch should be turned off between the first running and the second running.)

7-6-2 DLC, COMMON DESTINATIONS

1.The vehicle engine ECU uses the ISO14230 (Euro-OBD) protocol. As regards the position, connector shape and pin arrangement, the DLC is in accordance with the ISO 15031-3 (SAEJ1962) and has complied with the ISO14230 format. The OBD @ serial data line (K line of ISO14230) is used for the OBD @ generic scan tool or the diagnosis tester (DS-21/DS-@) in order to communicate with the ECU.

B8–25

5 sec.

Abnormal

Normal

Memorized

Illuminated

Extinguished

L21E3711ET10

4-digit code

2-digit code

L21E3712ET10

DTC No.

Oxygen sensor malfunction

Fuel trim (Air-fuel malfunction

Malfunction

evaluation method

MIL

2 trip

P0141/24

P0171/25

P0172/26

L21E3709ET10

12345678

9 10111213141516

Body ground ECU ground CANH OBD@serial data line (K line of ISO 14230)

REV

EFI-TECU-TCANL

DLC

BAT

T11E6536ET10

DTC No.

P0105/31

Detection item

Manifold absolute pressure/barometric pressure circuit malfunction

Intake air temp. circuit malfunc.

NOTE

• With the cable of the diagnosis tester (DS-21/DS-@)

connected to the DLC through the SST, turn "ON" the ignition switch. If the power indicator of the tester will not go on, conduct the following checks and repair any malfunctioning parts.

SST: 09991-87404-000

NOTE

• With the cable of the DS-@ diagnosis tester connected

to the DLC, turn ON the IG switch. If the tester does not function, perform the following checks and repair the faulty parts.

(1) Connect the diagnosis tester (DS-21/DS-@) to another

vehicle.

(2) Turn "ON" the ignition switch.

7-6-3 CONNECTING PROCEDURE FOR SST (EFI COMPUTER CHECK SUB-HARNESS)

1.When the EFI ECU terminal voltage is measured with the EFI ECU connector connected to the engine ECU, connect the SST, following the procedure given below.

NOTE

• The terminal number of the SST connector is the same as the EFI ECU connector.

2.Turn "LOCK" the ignition switch. Disconnect the battery negative (-) terminal with the ignition switch turned "LOCK".

NOTE

• Be sure to memorize the diagnostic trouble code before disconnecting the battery negative (-) terminal. Otherwise, the diagnostic trouble code(s) will be erased by disconnecting the battery negative (-) terminal.

3.Remove the No.1 instrument panel under cover.

4.Remove the fuse box opening cover and lower instrument cover.

5.Connect the following SST between the wire harness connectors and the EFI ECU connectors.

SST: 09842-97209-000

6.Reconnect the battery negative (-) terminal.

CAUTION

• When disconnecting or reconnecting the EFI ECU connectors, be sure to disconnect the battery negative (-) terminal with the ignition switch and all accessory switches in the off state.

• When installing a new battery, care must be exercised not to mistake the battery polarity. Failure to observe this caution could cause EFI ECU malfunction.

• Before using the SST, be sure to check to see if short circuit or open wire exists between the terminals of the SST.

B8–26

Power indicator (switch section)

L21E3714ET10

T11E6574ET10

Power supply button

T11E6535ET16

((((

1 2 3 9

10 11

((((

12 13 14 20 21 22

((((

23 24 25 33 32 33

((((

34 35 36 42 43 44

((((

45 46 47 53 54 55

((((

56 57 58 64 65 66

((((

67 68 69 75 76 77

((((

78 79 80 86 87 88

((((

89 90 91 97 98 99

((((

100 101 102 108 109 110

((((

111 112 113 120 121 122

((((

123 124 125 131 132 133

((((

134 135 136 142 143 144

((((

3Arrow A5

UPR

Arrow A

7-6-4 TROUBLE-SHOOTING PROCEDURE (1) Discription

1.The engine control system is equipped with diagnosis functions whose are capable of diagnosing malfunctioning sections. These functions give important clues in trouble-shooting. The flow chart on the next page shows how to proceed with trouble-shooting by using these diagnosis functions. The flow chart shows how the diagnostic trouble code check can be used effectively. Moreover, when its results are fully reviewed, you can determine whether you are going to do the trouble-shooting according to diagnostic trouble codes or the trouble-shooting according to malfunctioning phenomena. The diagnosis of this system is equipped with a battery back-up function (A function which supplies power for diagnosis memory even if the ignition switch is turned "LOCK".)

NOTE

• When no diagnosis tester (DS-21/DS-@) or OBD-II generic scan tool is used, the DTC or freeze-

frame data in the flow chart can not be read out.

B8–27

èè

1. Bringing malfunctioning vehicle in garage

çGo to

è2.

èè

2. Diagnosis through interview

1.Thoroughly obtain information from the customer concerning the conditions, environment and phenomena in which the malfunction took place.

çGo to

è0.

èè

3. Normal operation confirmation of diagnosis code indication of LCD in meter.

1.Short-circuit the terminals 4(ECU-T) and 13(E) of the DLC, using SST.

SST: 09991-87403-000

SST: 09991-87404-000

2.Ensure that the LCD in the meter indicates the diagnosis codes (Including the normal codes).

SPECIFIED VALUE: Will indicate

NOTE

• It is also fine when codes other than the CAN related ones are outputted.

çIf it is OK, pr

oceed to

è4.

çWhen it is NG, perform the following checks for the meter and if there is no problem, replace the

meter. (1) Check of harness for meter - DLC and DLC - body earth (2) Meter power supply system and earth system check

èè

4. Confirmation of diagnosis code of LCD in meter (CAN-related)

1.Ensure that the CAN related diagnosis code (Code 0051 - 0053) is not indicated in the LCD in the meter.

SPECIFIED VALUE: Code 0051- 0053 are not indicated.

çIf it is OK, pr

oceed to

è5.

çWhen it is NG, refer to the section of CAN communication system.

Refer to Page L2-1.

èè

5. Confirmation and record of engine check lamp condition

1.Confirm and record the lighting of the engine check lamp when turning "ON" the IG switch and after starting the engine.

çIn case of a, go to

è6. çIn case of b, go to è6. çIn case of c, perform the following operations and if there is no problem, replace the meter.

(1) Harness and connector check between battery and meter (2) Harness and connector check between meter and EFI ECU (3) EFI ECU power supply system and earth system check

When IG switch

is "ON"

After starting the

engine

Judgment

Illuminated Extinguished a Illuminated Illuminated b

Engine check

lamp

Extinguished Extinguished c

B8–28

èè

6. Confirmation and recording of diagnosis code

1.Short-circuit the terminals 5(EFI-T) and 13(E) of DLC, using the SST.

SST: 09991-87403-000

SST: 09991-87404-000

2.Confirm and record the diagnosis code outputted from the engine check lamp in the meter.

NOTE

• If the data during malfunctioning may be confirmed by the diagnosis system, record the data during malfunctioning before canceling the diagnosis code.

çGo to

è7.

èè

7. Malfunction phenomena confirmation

1.Confirm the malfunction phenomena and confirm the abnormal situation.

çGo to

è8.

èè

8. Erasure of diagnosis code

1.Erase the diagnosis code.

çGo to

è9.

èè

9. Confirmation of reproduction of malfunction phenomena

1.Confirm whether the malfunction phenomena can be reproduced.

çIf the malfunction phenomena can be r

eproduced, proceed to

è10.

çIf the malfunction phenomena cannot be reproduced, proceed to è11.

èè

10. Reconfirmation of diagnosis code

1.Perform reconfirmation of the diagnosis code.

çIf an abnor

mality code is outputted, proceed to è12.

çIf a nor

mal code is outputted, proceed to

è11.

èè

11. Basic check

1.Perform basic checks.

Refer to Page B8-40.

çGo to

è13.

èè

12. Trouble-shooting check according to diagnosis code

1.Perform trouble-shooting concerning the diagnosis code outputted.

Refer to Page B8-63.

çGo to

è14.

èè

13. Trouble-shooting according to malfunction phenomena.

1.Estimate the cause for the malfunction phenomenon and perform trouble-shooting.

Refer to Page B8-58.

çGo to

è14.

èè

14. Canceling method of diagnosis

1.Cancel the diagnosis code.

çGo to

è15.

B8–29

èè

15. Confirmation and recording of diagnosis code

1.Confirm and record the diagnosis code.

çIf a nor

mal code is outputted, proceed to è16.

çIf an abnormal code is outputted, go back to è7 and perfor

m the checks again.

èè

16. Confirmation test

1.Ensure that the malfunction phenomena claimed by the customer concerning the vehicle has been completely solved and that it has been recovered to the normal.

çIf it is OK, finish the tr

ouble shooting.

çIf it is NG, go back to è3 and perform the checks again.

B8–30

7-7 INQUIRY

1.In your attempt to remove the causes for a malfunction of the vehicle, you will not able to remove the causes unless you actually confirm the malfunctioning phenomenon. No matter how long you continue operations, the vehicle may not resume the normal state unless you confirm the malfunctioning phenomenon. The inquiry with the customer is a vital information collecting activity which is to be conducted previous to the confirmation of malfunctioning phenomenon.

2.This inquiry will provide you with an important clue in an effort to reproduce the malfunctioning phenomenon. Furthermore, the information obtained by the inquiry can be referred to during the troubleshooting. Hence, instead of making general questions, it is necessary to focus your questions on the items related to the malfunction.

3.The main points of the inquiry given below are the most important points in analyzing the malfunction. In some cases, the information about malfunctions whose took place in the past and about the history of previous repairs, which seem to have nothing to do with the current malfunction, may prove to be helpful in solving the malfunction. Hence, it is important to obtain as much information as possible and keep them accurately in mind as reference information when trouble-shooting the malfunctioning phenomenon.

B8–31

7-7-1 DIAGNOSIS BY INTERVIEW SHEET FOR ENGINE CONTROL SYSTEM

[INQUIRY SHEET]

Inquiry sheet

Name of customer

Vehicle model Engine - N/A, T/C,

S/C, carburetor, EFI, LPG

Transmission - 4M/T, 5M/T, 2WD, 4WD 2A/T, 3A/T,

4A/T

Details of vehicle

Frame No.

Registration date .

Date of malfunction .

Running distance km Equipment: [Sex] of customer (driver)

Male Female

[Age]

Approx.

[Occupation] [Places where vehicle is mainly used]

Urban district/suburb/seacoast/mountain/others

[Parking place] Outdoor/indoor

Symptom

Poor starting

Faulty idling

Poor drive-ability

Engine stall

No initial explosion takes place.

Hard starting (cold engine, hot engine, always)

Other ( )

Q Fast idling ineffective Q Idling speed too high Q Other ( ) Q

Hesitation (during start, during acceleration, during deceleration, during a certain period) Q Knocking

Q Backfire Q Lack of power Q Poor acceleration QPoor blow Q Other ( ) Q

During idling (during warming up, after warming up) Q At time of starting QDuring running ( )

Q Immediately after vehicle stops (Re-start possible, Re-start impossible)

Under loaded state (Air conditioner, electric load, power steering)

Q Other ( )

Explosion is incomplete although initial explosion takes place.

No cranking takes place.

Q Idling speed too low Q Idling unstable (cold engine, hot engine, always)

From when malfunction has started? Frequency of occurrence

Meteorological conditions

Q Since vehicle was purchased as a new car QRecently ( since what year/ month ) Q At all times Q Under a certain condition ( ) Q Sometimes QAt all times Q Fine Q Cloudy Q Rain Q Snow Q Other ( ) Q Temperature (about $C) (Spring, summer, autumn, winter) Q When cold Q After warming-up QDuring warming-up (Water temperature about °C) QUrban district QSuburb QHighway QMountainous road (Uphill, downhill) QNo relation Q During racing under no load Q During running (Vehicle speed: km/h, Engine speed: rpm, MT Which gear?) Q During turn (right curve, left curve)

Weather

Temperature Engine condition Road

Driving conditions

Other situations

State of malfunction indicator lamp (MIL)

Illuminated or flashing at all timesQ Illuminated or flashing sometimes QWill not go on. During checking 2nd time

Indication of DTC Q Reading out by using OBD@ generic

scan tool or DS-21 diagnosis tester

Q Reading-out of MIL flashing pattern by

shorting terminal T

QNormal Q Malfunction code ( ) Q Normal QMalfunction code ( )

L21E3717ES40

B8–32

7-8 CONFIRMATION, RECORD AND ERASURE OF DIAGNOSIS CODE

7-8-1 CHECKING METHOD OF DIAGNOSIS

1.Prior to the check, check the malfunction indicator lamp (MIL), following the procedure given below.

2. Check of malfunction indicator lamp (1) Ensure that the malfunction indicator lamp goes on when the ignition switch is turned "ON", but with

the engine not running.

NOTE

• If the malfunction indicator lamp (MIL) fails to go on, perform the trouble-shooting for the combination meter.

(2) Ensure that the malfunction indicator lamp goes out

when the engine starts. If the lamp remains illuminated or is flashing, the diagnosis system is detecting a malfunction. Therefore, a DTC is memorized in the EFI ECU. If no DTC is memorized in the EFI ECU, perform the trouble-shooting for the malfunction indicator lamp circuit.

(1) Check of DTC, using DS-21 diagnosis tester:

1.Prepare the DS-21 diagnosis tester.

2.Connect the DS-21 diagnosis tester to the DLC located at the lower section of the instrument panel on the driver's seat side. At this time, the DS-21 tester should be connected to the DLC with the following SST interposed.

SST: 09991-87404-000

NOTE

• When DS-21 diagnosis tester is used, refer the instruction manual for tester.

(2) Check of DTC, using DS-@ diagnosis tester or OBD @

generic scan tool

1.Prepare the DS-@ diagnosis tester or OBD @ generic scan

tool.

2.Connect the DS-@ diagnosis tester or the OBD @ generic

tester directly to the DLC located at the lower section of the instrument panel on the driver's seat side.

NOTE

• When DS-@ diagnosis tester or OBD-@ generic scan tool is used, refer the instruction manual for each tester.

B8–33

400 rpm

200 rpm

Hysteresis

Extinguished

Illuminated

L21E3718ET10

T11E6537T10

SST

T11E6573T10

(3) Check of DTC without using diagnosis tester (DS-

21/DS-@) or OBD @ generic scan tool

1.With the ignition switch turned "LOCK", connect the following SST to the DLC located at the lower section of the instrument panel on the driver's seat side.

SST: 09991-87404-000(1)

2.Short circuit the DLC terminals 5 (EFI-T) and 13 (E), using the SST.

SST: 09991-87403-000(2)

3.Turn the ignition switch to the "ON" position. At this time, be careful not to start the engine.

4.Read out the diagnostic trouble code (DTC) by observing the flashing number of the malfunction indicator lamp.

5.The illustration shows an example of the flashing pattern of the normal code. The malfunction indicator lamp glows for

0.25 second, right after the ignition switch has been turned "ON". After a lapse of 0.25 second, the malfunction indicator lamp again glows for 0.25 second. Then, this pattern will be repeated.

6.The illustration shows an example of the flashing pattern of the code No. 21. The diagnostic trouble code is composed of two digits. These two numbers are indicated by blinking of the malfunction indicator lamp. Four seconds after the ignition switch has been turned "ON", the malfunction indicator lamp indicates first the number of the tens digit of the diagnostic trouble code by glowing the same times as the number. The lamp glows for 0.5 second each time and then it is extinguished for 0.5 second. After a pause of 1.5 seconds, the lamp indicates the number of the units digit of the diagnostic trouble code by glowing the same times as the number. The lamp glows for 0.5 second each time and then it is extinguished for 0.5 second. Then, this pattern will be repeated after a pause of 4 seconds.

B8–34

T11E6538ET10

Earth

EFI-T terminal

SST (2)

SST (1)

L21E3721ET10

0.25 Sec.

Glowing

Extinguished

0.25 Sec.

L21E3722ET10

0.5 Sec.

Glowing

Extinguished

0.5 Sec.

1.5 Sec.

In case of malfunction code number 21

4 Sec.

L21E3723ET10

7.The illustration shows an example of the flashing pattern of the codes No. 21 and 31. In cases where plural malfunction codes have been detected, the two-digit diagnostic trouble codes are indicated in the sequence of the code number, starting from a smaller number. Each diagnostic trouble code is indicated in the above described pattern. A pause of 2.5 seconds occurs between the outputs of respective diagnostic trouble codes, thus separating one from the others. After all of the plural diagnostic trouble codes that have been detected are indicated, the malfunction indicator lamp is extinguished for four seconds. Then, the detected plural diagnostic trouble codes will be indicated again.

8.For the details of malfunctions, refer to the diagnosis code chart.

9.After completion of the check, disconnect the jump wire and turn "LOCK" the ignition switch. Then, disconnect the SST from the DLC.

NOTE

• In cases where plural malfunction codes have been detected, the indication will be made progressively, starting from the smaller number to the larger number.

• In cases where the diagnosis tester (DS-21/DS-@) or the OBD @ generic scan tool is not used, it is impossible to take a reading of unidentified two-trip DTC from the SST connector.

• When malfunctioning phenomena are to be reproduced without using the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool, follow the procedure given below to detect the DTC.

(1) It is assumed that two trip detection logic is used for

the DTC detection.

(2) Therefore, after a malfunctioning phenomenon is first

reproduced, turn "LOCK" the ignition switch.

(3) Then, repeat the same reproduction procedure once

again.

(4) When the malfunction is reproduced again, the mal-

function indicator lamp goes on and the DTC is memorized in the engine ECU.

B8–35

Glowing

Extinguished

In case of malfunction code number 21 and 31

2.5 Sec. 4 Sec.

L21E3724ET10

NOTE

• The diagnosis codes are for reading out use.

NOTE

• When malfunctioning phenomena are to be repro-

duced with the DS-21 diagnosis tester or OBD @ generic scan tool connected to the DLC, the "Continuous monitoring results" function can be used. (In the case of the diagnosis tester (DS-21/DS-@), select the "Continuous monitoring results" of the "Vehicle communication" in CARB mode.) This function makes it possible to indicate the DTC when the malfunctioning phenomenon is first reproduced. (Request of onboard monitoring test results of ISO 15031-5 Continuous monitoring system.)

NOTE

• In the case of the DS-@ diagnosis tester, select the

"Pending"of "DTC" in CARB mode.

7-8-2 CANCELING METHOD OF DIAGNOSIS

1.The DTC and freeze-frame data can be erased through the following methods.

(1) The diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool is used to erase the DTC. (For the

operating procedure, refer to the instruction manual.)

(2) The power supply to the EFI ECU is shut off to erase the DTC without using the diagnosis tester

(DS-21/DS-@) or OBD @ generic scan tool. (Disconnect the battery negative (-) terminal or detach the EFI fuse.)

(1) When DS-21 diagnosis is used:

1.In the same way as the check of DTC, connect the diag-

nosis tester (DS-21/DS-@) to the DLC with the following SST interposed.

SST: 09991-87404-000

NOTE

• When DS-21 diagnosis tester is used, refer the instruction manual for tester.

B8–36

Vehicle communication

Indication of malfunction code Erasing of malfunction code Data display for freeze frame data Indication of current data Front O

2 sensor test results

Rear O

2 sensor test results

Continuous monitoring results

Mode 01

select function

L21E3710ET10

T11E6570T16

Function View System Bar Help

EFI / DTC

Current DTC

Current

DTC

Data

List

View Utility

Active

Test

Pending History Clear

T11E6537T10

SST

(2) When DS-21 diagnosis tester or OBD @ generic scan

tool is used:

1.In the same way as the check of DTC, connect the DS-@ diagnosis tester or the OBD @ generic scan tool directly to the DLC.

NOTE

• When DS-@ diagnosis tester or OBD @ generic scan

tool is used, refer the instruction manual for each tester.

(3) When diagnosis tester (DS-21/DS-@) or OBD @ gener-

ic scan tool is not used:

1.Erasure by disconnecting EFI fuse To erase the diagnostic trouble codes (DTC) memorized in the ECU after malfunctions have been repaired, disconnect the EFI fuse from the relay block for at least 60 seconds with the ignition switch turned "LOCK". (When ambient temperature is about 20°C.)

NOTE

• It is possible to complete this erasing for approximately 60 seconds. In some cases, however, it may take longer. Furthermore, the erasing can be made by disconnecting the circuit, such as the battery power supply and fusible link. In cases where the battery negative (-) terminal is to be disconnected, record the radio channels in advance. After completion of the operation, set the radio channels the same as before.

• In cases where the same malfunction (DTC) cannot be detected again during the 40 cycles of the engine warming-up, the DTC and freeze-frame data will be automatically erased from the ECU memory. (Only in the case of vehicles with EU specifications)

• Warming-up cycle

• The warming-up cycle refers to a driving cycle that suf-

ficiently allows the water temperature to rise by at least 22°C above the temperature at the time of engine starting and to reach at least 70°C.

• Driving cycle

• The driving cycle consists of the engine starting and

engine stopping.

B8–37

T11E6573T10

T11E6540T16

EFI 15A

7-9 SYMPTOM CONFIRMATION

7-9-1 CONFIRMATION OF REPRODUCTION OF MALFUNCTIONING PHENOMENA

1.In the course of trouble-shooting, the operator can not pinpoint the cause for the malfunction unless he confirms the phenomenon. For this purpose, it is indispensable to reproduce the malfunctioning phenomenon by creating conditions and environments that are similar to those customer.

2.As for phenomena whose can not be reproduced easily, it is necessary to produce running conditions that are similar to those when the malfunction occurred (Road surface condition, weather condition, driving condition). For this end, it is of great importance to try to reproduce the conditions that are similar to those when the malfunction occurred (Road surface condition, weather relays by hand), heat (applying hot air) and water (Applying moisture).

3.Vibration, heat or moisture can constitute causes for malfunction that are difficult to reproduce.

4.Therefore, with the vehicle in a stationary state, you can perform the following malfunction reproduction simulation tests given below. Moreover, if you presume a section (Part) which can cause a malfunction and connect a tester, etc. to that section so as to confirm the malfunctioning phenomenon, you can also achieve a function to that section so as to confirm the malfunctioning phenomenon, you can also achieve a function evaluation of that section (Part).

(1) Malfunction reproduction simulation test methods 1 Vibration method:

1.When vibration is thought to be the main cause (1) Connector

Lightly shake the connector vertically and laterally.

(2) Wire harness

Lightly shake the wire harness vertically and laterally. The points to be checked are connector joints, the vibrating point and the section where the wire harness is passing through the body.

(3) Parts, sensors

With your finger, apply light vibrations to a part of the sensor which is presumed to be the cause for the malfunction. Check to see if the malfunction is reproduced.

NOTE

• Be careful not to apply too strong vibration to a relay, for it can cause an open wire in the relay.

B8–38

L21E3726ET10

Shake lightly

L21E3727ET10

T11E6541T10

2 Cool/hot method:

1.When a suspected section is likely causing the malfunction when it is cold or hot. (1) Heat a component which is presumed to be causing

the malfunction by using a dryer or the like. Check to see if the malfunction occurs.

CAUTION

• Do not heat the section beyond 60Ç. (Temperature

limit to assure that no damage be made to the component.)

• Do not directly heat the parts inside the ECU.

3 Water applying method:

1.When the malfunction is believed to occur on rainy days or under humid conditions. Apply water to the vehicle. Check to see if the malfunction occurs.

NOTE

• Never apply water directly to the engine compartment. By applying water to the front of the radiator, you can indirectly change the temperature and humidity.

• Never apply water directly to the electronic parts.

• If rain leaks into the vehicle compartment, rain may get into the inside of the ECU through the wire

harnesses. If the vehicle has experienced any rain leakage before, utmost attention must be paid in respect to this point.

7-9-2 RECHECK AND MAKING RECORD OF DTC/FREEZE-FRAME DATA

1.By checking the DTC/freeze-frame data after confirming the reproduction of the malfunctioning phenomenon, it is possible to judge whether the system related to the DTC that was indicated before confirmation of the reproduction is now functioning properly or not. Then, you are to proceed to one of the following three steps. (1) When a DTC was indicated at the time of checking the DTC and the same DTC is indicated after

the confirmation of reproduction of the malfunction, it indicates that the malfunction is still persisting in the diagnosis circuit. Proceed to the trouble-shooting according codes.

(2) When no abnormal code is indicated, although the occurrence of malfunction was observed dur-

ing the confirmation of reproduction of malfunction, a malfunction other than those related to the diagnosis system is likely taking place. Proceed to the trouble-shooting according to malfunctioning phenomena.

(3) When no malfunction is observed during the confirmation of reproduction of malfunction, and the

normal code is indicated at the check of the DTC, it is presumed that an abnormality, such as poor contacts at the harnesses and connectors, occurred in the past, but now they are functioning properly. Check the harnesses and connectors of those systems related to the DTC that was indicated before the confirmation of reproduction of the malfunctioning phenomenon.

B8–39

Malfunction

Dryer

Cooling agent

L21E3729ET10

7-10 BASIC CHECK

7-10-1 BASIC ENGINE CHECK FLOW CHART

1.When the ECU is detecting no DTC during the reproduction test of malfunctioning phenomena and when no abnormality is found by the visual inspection, it is necessary to progressively perform the trouble-shooting for circuits which are most likely causing the malfunctions.

2.In many cases, sections causing malfunctions can be narrowed down quickly and effectively by performing the basic engine check indicated in the following flow chart. Therefore, it is very important to perform this check for the engine trouble-shooting.

(1) Basic engine check

èè

1. Check the battery voltage.

1.Is the battery voltage 11 V or more with the engine in a stopped state?

çIf it is OK, go to

è2.

çIf it is NG, charge the battery or replace it.

èè

2. Check the engine cranking.

1.Does the engine crank?

çIf it is OK, go to

è3.

çIf it is NG, go to "Matrix Table for Trouble-Shooting According to Malfunctioning Phenomena".

Refer to Page B8-58.

èè

3. Check the engine starting.

1.Does the engine start?

çIf it is OK, go to

è4.

çIf it is NG, go to è6.

èè

4. Check the engine idle speed.

1.Warm up the engine, until the engine water temperature reaches 90Ç or more.

2.Turn "LOCK" all electric load switches (Including A/C switch).

3.Set the transmission to neutral.

4.When the DS-21 diagnosis tester is used: (1) Connect the DS-21 tester to the DLC with the SST interposed.

SST: 09991-87404-000

5.When the DS-@ diagnosis tester or OBD @ generic scan tool is used: (1) Connect the DS-@ diagnosis tester or OBD @ generic scan tool to the DLC directly.

6.Check the engine idle speed.

B8–40

T11E6539ET10

SST (1)

Earth

Tachometer terminal

7.When the diagnosis tester (DS-21/DS-@) or general-pur-

pose tester is not used, connect a tachometer to the Tachometer terminal. (1) Install an engine tachometer to the terminal "REV" of

the DLC, using the SST.

SST: 09991-87402-000

09991-87404-000

NOTE

• The SST 09991-87404-000 is a harness for extension use. This does not have to be used.

SPECIFIED VALUE: 800

+100

-50

rpm

çIf it is OK, go to

è5.

çIf it is NG, go to "Matrix Table for Tr

ouble-Shooting

According to Malfunctioning Phenomena".

Refer to Page B8-58.

èè

5. Check the ignition timing.

1.When the diagnosis tester (DS-21/DS-@) is not used:

(1) Connect the terminal T of the SST connector to the

earth terminal, using a jump wire.

SST: 09991-87404-000(1)

SST: 09991-87403-000(2)

2.When the DS-21 diagnosis tester is used: (1) Select the "Engine adjustment" on the course menu so

as to connect the EFI- T terminal.

3.When the DS-@ diagnosis tester is used: (1) Select the "Terminal T" of "Active Test" so as to connect

the EFI-T terminal.

B8–41

T11E6571T16

Function View System Bar Help

EFI / ActiveTest

DTC

Data

List

View Utility

Active

Test

Exit

Value

All Data

Engine coolant temperature $C

Manifold absolute pressure kPa Engine revolution speed rpm Vehicle speed km/h Ignition timing advance $ Intake air temperature $C abs, throttle position SSR % Output volt of FR O2 SSR V Short term of FR O2 SSR

Terminal T ON

Unit

H11E8026T10

REV

DLC

T11E6538ET10

Earth

EFI-T terminal

SST (2)

SST (1)

C13E5588ET10

Actuator driving

T terminal ON

T terminal OFF T terminal released

select function

4.Attach the clip of the timing light to the wire harness for timing light connection wire.

5.Is the timing mark of the crankshaft within a range of the indicator for ignition timing check provided on the timing chain cover?

SPECIFIED VALUE: 10 degrees&2 degrees (BTDC)

6.Are the check results OK?

çIf it is OK, go to "Matrix T

able for Trouble-Shooting

According to Malfunctioning Phenomena".

Refer to Page B8-58.

çIf it is NG, check the timing chain for wr

ong assembling. Also, check the plunger protruding amount of the tensioner.

èè

6. Fuel pressure check (Simple check).

1.When DS-21 diagnosis tester or DS-@diagnosis tester is

not used: (1) Ensure that the fuel tank is filled with sufficient fuel.

(2) Remove the fuel pump relay and connect a jump wire,

as indicated in the illustration.

SST: 09991-87403-000

(3) Ensure that the IG switch is turned "ON" and the pul-

sation damper exhibits pulsation.

B8–42

T11E6037T10

T11E6038T10

T11E6534ET10

Main relay

Fuel pump relay

T11E6549T10

2.When DS-21 diagnosis tester is used: (1) Connect the DS-21 diagnosis tester to the DLC with

the SST interposed.

SST: 09991-87404-000

(2) Turn "ON" the ignition switch. Then, select the "Fuel

pump" of the "Actuator driving" among the individual functions so as to drive the fuel pump.

(3) Does the pulsation damper exhibit pulsation?

3.When DS-@ diagnosis tester is used: (1) Connect the DS-II diagnosis tester to the DLC. (2) Turn "ON" the ignition switch. Then, select the "Fuel

Pump" of the "Actuator driving" so as to drive the fuel pump.

(3) Does the pulsation damper exhibit pulsation?

çIf it is OK, go to

è7.

çIf it is NG, go to "Check of Fuel Pump and F/P

Regulator".

Refer to Page B8-202.

B8–43

T11E6572T16

Function View System Bar Help

EFI / ActiveTest

DTC

Data

List

View Utility

Active

Test

Exit

Value

All Data

Engine coolant temperature $C

Fuel pump ON

Unit

T11E6537T10

SST

C13E5589ET10

Actuator driving

Fuel pump driving

Fuel pump stopped Fuel pump released

select function

T11E6570T16

Function View System Bar Help

EFI / DTC

Current DTC

Current

DTC

Data

List

View Utility

Active

Test

Pending History Clear

èè

7. Spark check.

1.Remove the fuel pump relay from the relay block.

2.Remove the ignition coils and spark plugs (All cylinders #1, 2, 3).

3.Disconnect the fuel pump relay

4.Disconnect the connector of the injector.

CAUTION

• Stop the fuel injection by the operations at Steps 3 and 4 above so as to prevent the catalyst from being damaged by unburnt gas, etc.

• When there is no fuel, the injector injection must be avoided wherever possible, as this may damage the injector.

5.Install the spark plug to the ignition coil. Connect the ignition coil connector to the ignition coil.

6.Ground the spark plug.

7.Crank the engine. At this time, check to see if each spark plug sparks.

8.Are sparks jumping?

çIf it is OK, go to

è8.

çIf it is NG, go to Check of ignition System.

èè

8. Confirmation of operation of fuel injector.

1.Install the spark plugs, ignition coils and fuel pump relay. Connect the connector of the ignition coil.

2.Using a sound scope, check each injector for operation sound while the engine is being cranked or idling.

3.Can you hear operator sound of all injectors?

çIf it is OK, go to

è9.

çIf it is NG, go to "Check of Fuel Injector Circuit".

Refer to Page B8-202.

èè

9. Inspection of compression pressure.

1.Warm up the engine.

2.With the IG switch turned "LOCK", remove all of the ignition coils and spark plugs.

3.Temporarily remove the main relay and fuel pump relay.

4.Insert a compression gauge into the spark plug hole.

5.Depress the accelerator pedal fully.

6.While cranking the engine, measure the compression pressure.

7.Repeat the steps 4, 5 and 6 to perform the measurement for all cylinders.

NOTE

• Be sure to use a fully-charged battery. Also the measurement should be performed in the shortest possible length of time.

8.Are the check results OK?

çIf it is OK, go to

è10.

çIf it is NG, perform the checks, referring to the section

ENGINE MECHANICAL.

B8–44

T11E6534ET10

Main relay

Fuel pump relay

T11E6534ET10

Main relay

Fuel pump relay

èè

10. Inspection of idle CO and HC concentrations.

1.Warm up the engine completely.

NOTE

• Warm up the engine, until the fan motor starts to operate.

2.Measure CO and HC concentrations at idle speed.

SPECIFIED VALUE:

3.Are the check results OK?

çIf it is OK, go to "Matrix T

able for Trouble-Shooting According to Malfunctioning Phenomena".

Refer to Page B8-58.

çIf it is NG, per

form the checks, referring to the section ENGINE MECHANICAL.

(2) Check of wire harnesses and connectors

1.Check of open wire This is caused by detached wire harness, poor contact inside the connector, detached connector terminal, and so forth.

NOTE

• The wires are rarely cut at the center. In most cases, an open wire occurs at the connectors. Particularly, the connectors of the sensor and actuator should be checked very carefully.

• Poor contact is caused by rust formation at the connector terminal, foreign substances adhered to the terminal, or drop in the contact pressure between the male and female terminals of the connector.

• Simply disconnect the connector once, and then, reconnect it. It may change the contacting condition, thus returning to the normal operation. Hence, if no abnormality was found when the wire harness and connector were checked during the trouble-shooting, and if the malfunction ceases to exist after completion of the checks, then the wire harness or connector was most likely causing the malfunction.

2.Check of short circuit This is caused by a short circuit between the wire harness and the body ground or by an internal short circuit of the switches, etc.

NOTE

• If a short circuit is present between the wire harness and the body ground, thoroughly check to see if the wire harness is caught in the body, if the wire is rubbed and the insulator section is ruptured, thus contacting other parts, and if the wire is clamped properly.

3.Continuity check (Check for open wire) (1) Disconnect the connector on both sides of the EFI

ECU and sensor.

CO concentration Not to exceed 0.2 % HC concentration Not to exceed 200 ppm

B8–45

Sensor side

ECU side

L21E3734ET10

(2) Measure the resistance between the relevant terminals

of the connector.

SPECIFIED VALUE: Resistance: 1+ or less

NOTE

• Lightly shake the wire harness in a longitudinal direction as well as in a horizontal direction when the resistance is measured.

• In the case of non-waterproof connectors, the test probe should be inserted into the connector from each wire harness side.

• In cases where the waterproof connector is checked without removing the waterproof rubber, be very careful not to deform the connector terminal when applying the test probes.

4.Continuity check (Check for short circuit) (1) Disconnect the connector on both sides. (2) Measure the resistance between the relevant terminal

of the connector and the body ground. Moreover, be sure to check for the connectors on both sides.

SPECIFIED VALUE: Resistance:1 M+ or more

B8–46

Tester probes

L21E3735ET10

L21E3736ET10

Sensor side

ECU side

L21E3737ET10

NOTE

• Lightly shake the wire harness in a longitudinal direction as well as in a horizontal direction when the resistance is measured.

5.Check of EFI ECU and its circuit (1) The EFI ECU and its circuit can be checked by mea-

suring the voltage and resistance at the EFI ECU connector. In order to narrow down the cause further after the cause has been decided to a certain system, it is imperative to measure the voltage and resistance of the external route of the EFI ECU.

(2) The measurement of the voltage and resistance is con-

ducted during the system check, following the procedure given below.

CAUTION

• The EFI ECU cannot be checked by itself. Never connect a voltmeter or an ohmmeter to the EFI ECU with the connector disconnected from the EFI ECU.

• When conducting the continuity test or measuring the resistance, turn "LOCK" the ignition switch once. Then, disconnect the connector at the EFI ECU.

6.Voltage check (1) Installation of SST

First, install the SST between the engine ECU and the vehicle harness. For the installation procedure, refer to the section under.

(2) Measure the voltages between the respective termi-

nals of the SST connectors.

(3) Check to see if the measured values conform to the

specification in accordance with the following table "Characteristics of ECU Output".

NOTE

• Make sure that the battery voltage is 11 V or more with the ignition switch turned "ON", for each terminal voltage is affected by the battery voltage.

B8–47

L21E3726ET10

T11E6535ET16

((((

1 2 3 9

10 11

((((

12 13 14 20 21 22

((((

23 24 25 33 32 33

((((

34 35 36 42 43 44

((((

45 46 47 53 54 55

((((

56 57 58 64 65 66

((((

67 68 69 75 76 77

((((

78 79 80 86 87 88

((((

89 90 91 97 98 99

((((

100 101 102 108 109 110

((((

111 112 113 120 121 122

((((

123 124 125 131 132 133

((((

134 135 136 142 143 144

((((

3Arrow A5

UPR

Arrow A

7.Resistance check (1) Installation of SST

First, install the SST between the engine ECU and the vehicle harness. However, the SST connector at the ECU side should not be connected.

For the installation procedure, refer to the section under "Connecting Procedure for SST". (2) Measure the resistances between the respective terminals. (3) Check to see if the measured resistances conform to the specification in accordance with the fol-

lowing table "Standard Resistances".

NOTE

• Make sure that the ignition switch is turned "LOCK" during the measurement.

• The following table shows the resistance at the time when the temperature of parts is 20°C.

STANDARD RESISTANCES

System to be checked Terminals Circuit Standard resistance Front oxygen sensor system

15 (OXH1) - 27 ('B)

Front oxygen sensor and main

relay

6.7 - 7.7+

Rear oxygen sensor system

14 (OXH2) - 27 ('B)

Rear oxygen sensor and main

relay

11.7 - 14.5+

Engine revolution sensor system

59 (N1') - 128 (N1()

Engine revolution sensor sys-

tem

1850 - 2450+

Camshaft position sensor system

58(N2') - 127(N2()

Camshaft position sensor sys-

tem

1850 - 2450+

24 (#10) - 27 ('B) 23 (#20) - 27 ('B)

Injector system

22 (#30) - 27 ('B)

No.1 - 3 fuel injector 11.6 - 12.4+

VSV for evaporative emission control system purge control system

16 (PRG) - 27 ('B)

Evaporative emission purge

control valve

30 - 34+

125 (E1) - Body ground

19 (E2) - Body ground

122 (E2PM) - Body ground

Ground system

116 (E21) - Body ground

Ground 10+or less

B8–48

7-10-2 CHECK AND REPAIR BY CHART ACCORDING TO DTC (1) Scan tool data (ECU DATA)

1.The following data values given below are representative values obtained under the "normal condition".

However, there are cases where the system is functioning normally even if the measured value is different from the values listed here. Therefore, no judgment as to whether any malfunction is occurring or not should be made only on the basis of these data under the "normal condition".

NOTE

• The data monitor value may vary significantly, depending on slight difference in the measurement, difference in the measurement environment, deterioration due to passage of time in the vehicle, and so forth. Therefore, it is difficult to indicate the definite reference values. Hence, there are cases where malfunctions are occurring even when the measured value is within the reference value.

• With regard to minor phenomenon, such as hesitation and rough idling, it is necessary to make total evaluation, based on all the data monitor items, by sampling the data of the vehicle of the same type under the same conditions and comparing them.

• In the case of the OBD @ generic scan tool, it is possible to take a reading of the values with an ~ mark in the following table.

• When checking the data under a condition where the engine is "idling" or "racing", the shift lever should be placed in the "neutral", the A/C switch should be turned "OFF", and all accessory switches should be turned "OFF".

B8–49

Items specified by CARB

DS-21 diagnosis

tester display

Signal name Vehicle condition Reference values under

normal condition

1 FUEL SYSTEM FSYS At idle speed after warming up O2

At idle speed after warming up 1.7 - 2.2 %

2 CALC LOAD LOAD

At 2500 rpm with no load after warming up 5.0 - 6.3 %

Cold start - Warming up running Value should be rising

gradually

When engine has warmed up completely 80 - 102°C

During fail-safe function (At time of starting) 20°C

3 COOLANT TEMP ECT

During fail-safe function (After starting) 80°C

4 SHORT FT SHRT At idle speed after warming up (20 - 20 %

5 LONG FT LONG At idle speed after warming up (16 - '16 %

When engine is running at constant speed There should be no re-

markable variation

6 ENGINE SPEED RPM

At idle speed after warming up 750 - 900 rpm

7 VEHICLE SPEED VS During running (Compared with speedometer) There should be no re-

markable variation

At idle speed after warming up (5 - 15$

8 IGN ADVANCE ITA

When idle switch is "OFF" Changes should be made

according to running con-

ditions

9 INTAKE AIR TEMP IAT When engine is running Changes should be made

according to running con-

ditions

When ignition switch is "ON" 80 - 110 kPa

At idle speed after warming up 21 - 48 kPa

10 MAIN ABS PRESS MAP

During fail-safe function 34 - 72 kPa

11 THROTTLE POS TP When acceleration pedal is operate Changes should be made

according to pedal opera-

tion

O2FP (5 - '5 %

12 OXYGEN SENSOR S1

At idle speed after warming up

0.0 - 1.0 V

O2RP 20 - 77 %

13 OXYGEN SENSOR S2

When engine is running at 2000 rpm, for 3 min-

utes or longer after warming up.

0.1 - 0.9 V

14 MIL ON RUN DIST DWM When there is no DTC 0 km

B8–50

Items specified by DMC

NOTE

• The items with a (~) mark is provided only for the EU specifications. Therefore, in the case of the non-EU specification vehicles, no indication will be made.

diagnosis tester (DS-

21/DS-@) display

Signal name

Vehicle condition

Reference values under

normal condition

1 BATTERY VOLTAGE BAT When engine is running at 5000 rpm (25$C) Approx. 14 V 2 ELECTRIC LOAD DSW When light, heater blower, defogger or radiator

fan is "ON"

OFF!ON

3 AIR CONDITIONING AC When air conditioner switch is set to "ON" OFF!ON 4 CTP SWITCH IDL When throttle valve is switched from fully closed

state to opened state

ON!OFF

Cold start - Warming up running

Value should be decreas-

ing gradually

5 INJ PULSE WIDTH TAU

At idle speed after warming up 1.2 - 1.8 ms

When ignition switch is "ON" 0%

Cold start - Warming up running Value should be decreas-

ing gradually

At idle speed after warming up 5 - 15 %

When air conditioner switch is set to "ON" 20 - 60 %

When light, heater blower or defogger is "ON" 7 - 19 %

6 ISC DUTY RATIO ISC

At idle speed after warming up 2 - 14%

During vehicle running

The value changes, de-

pending on driving condi-

tions.

7 ACTUAL DIS ANGLE OF

IN CAM

At idle speed after warming up 0

8 TARGET DISP ANGLE

OF IN CAM

VTT

During vehicle running

The value changes, de-

pending on driving condi-

tions.

B8–51

(2) DTC chart specifications

1.The parameters indicated in the table may vary, depending upon the system types and specifications. This applies to vehicles for all destinations. For details of the checking of each code, refer to the DTC chart for each code.

Codes specified by ISO/SAE

DTC No. Diagnosis Items Diagnosis contents Malfunction

evaluation

method

Warning indica-

tion

P0105/31 Manifold absolute pres-

sure/barometric pressure circuit malfunction

When abnormality takes place in the signal from the intake manifold pressure/intake temperature integrated sensor (Manifold absolute pressure sensor section) circuit: ;Malfunction of the sensor, or open wire or short circuit in the intake manifold pressure/intake temperature integrated sensor (Manifold absolute pressure sensor section) circuit.

1 trip <

P0110/43 Intake air temperature

sensor circuit malfunction

When malfunction takes place in the signal from the intake manifold pressure/intake temperature integrated sensor (Intake air temperature sensor section): ;Malfunction of the sensor, or open wire or short circuit in intake manifold pressure/intake temperature integrated sensor (Intake air temperature sensor section) circuit.

1 trip <

P0115/42 Engine coolant tempera-

ture sensor circuit malfunction

When abnormality takes place in the signal from the engine coolant temperature sensor: ;Malfunction of the sensor, or open wire or short circuit in engine coolant temperature sensor circuit.

1 trip <

P0120/41 Throttle/pedal position

sensor/switch

When abnormality takes place in the signal from throttle/pedal position sensor: ;Malfunction of the sensor, or open wire or short circuit in throttle/pedal position sensor/switch circuit.

1 trip <

P0130/21 Oxygen sensor circuit

malfunction (Bank 1 sensor 1)

When abnormalities take place two times consecutively in the signal from the oxygen sensor: ;Malfunction of the sensor, or open wire or short circuit in oxygen sensor circuit.

2 trip <

P0135/23

Oxygen sensor heater circuit malfunction (Bank1 sensor1).

When abnormalities take place in the signal from the oxygen sensor heater: ;Open wire or short circuit in oxygen sensor heater circuit.

2 trip <

P0136/22 Rear oxygen sensor cir-

cuit malfunction (Bank 1 sensor 2)

When abnormalities take place two times consecutively in the signal from the rear oxygen sensor: ;Malfunction of the sensor, or open wire or short in the rear oxygen sensor circuit.

2 trip <

P0141/24

Oxygen sensor heater circuit malfunction (Bank 1 sensor 2)

When abnormalities take place in the signal from the oxygen sensor heater: ;Open wire or short circuit in oxygen sensor heater circuit.

2 trip <

P0171/25 Fuel trim system too lean

(Air-fuel ratio lean malfunction, bank 1)

When the air-to-fuel ratio deviates two times consecutively to the lean side due to abnormality of the fuel trim system: ;Abnormal combustion pressure, malfunctioning injector or oxygen sensor

2 trip <

B8–52

B8–53

DTC No. Diagnosis Items Diagnosis contents Malfunction

evaluation

method

P0172/26 Fuel trim system too rich

(Air-fuel ratio rich malfunction, bank 1)

When the air-to-fuel ratio deviates two times consecutively to the rich side due to abnormality of the fuel trim system:

2 trip <

;Abnormal combustion pressure, malfunctioning injector or oxygen sensor When the ignition signal is not inputted continually. When malfunction takes place in the signal from the Ion current combustion control system

1trip <

2 trip MIL flashing dur-

P0350/16

P0300/17

P0301/17 P0302/17 P0303/17

Ignition system circuit malfunction

Random/multiple cylinder misfire detected

Misfire detected

Cylinder 1

Cylinder 2 Cylinder 3

P0325/18 Knock sensor 1 circuit

malfunction

When malfunction takes place in the signal from the knock sensor:

1 trip (

;Malfunction of the sensor, or open wire or short circuit in the signal system

P0335/13 Engine revolution sensor

circuit malfunction

When malfunction takes place in the signal from the engine revolution sensor:

1 trip <

;Malfunction of the sensor, or open wire or short circuit in engine revolution sensor circuit.

P0340/14 Camshaft position sen-

sor circuit malfunction

When malfunction takes place in the signal from the camshaft position sensor.

1 trip <

;Malfunction of the sensor, or open wire or short-circuit in the sensor circuit.

P0401/79 Stepper motor type EGR

valve system malfunction

When abnormalities take place in the flow rate of EGR gas:

2 trip <

(Function)

P0403/79 Stepper motor type EGR

valve system malfunction (Open wire)

P0443/76 Evaporative emission

control system purge control valve circuit malfunction

When abnormalities take place in the stepper motor type EGR valve detection signal: ;Open wire or short circuit in the signal system When malfunction takes place in the detection signal of the evaporative emission control system purge control valve: ;Open wire or short circuit in evaporative

2 trip <

emission control system purge control circuit.

P500/52 Vehicle speed sensor

circuit malfunction

When malfunction takes place in the signal from the vehicle speed sensor.

1 trip <

;Sensor malfunction, open wire or short circuit of the signal system

P0505/71 Idle control system mal-

function

When malfunction takes in the signal from the valve for ISC.

1 trip <

;Open wire or short in valve for ISC circuit

Warning indica-

tion

ing misfire detec-

tion.

NOTE

• 1 trip: 1 trip detection logic

• 2 trip: 2 trip detection logic

• MIL: Malfunction indicator lamp

• When the "O" mark is shown in the MIL column, the lamp will go on for that DTC number, but

when the "(" mark is shown, the lamp will not go on for that DTC number. Therefore, it is possible to read out the DTC number by using the diagnosis tester (DS-21/DS-@). As for the DTC number bearing the mark, the MIL will go on except the EU specifications.

• DTC number with ~1 mark: For EU specifications

• DTC number with ~2 mark: For general specifications

B8–54

Codes specified by DMC

NOTE

• 1 trip: 1 trip detection logic

• 2 trip: 2 trip detection logic

• MIL: Malfunction indicator lamp

• When the "O" mark is shown in the MIL column, the lamp will go on for that DTC number, but

when the "(" mark is shown, the lamp will not go on for that DTC No. Therefore, it is possible to read out the DTC No. by using the diagnosis tester (DS-21/DS-@). As for the DTC No. bearing the mark, the MIL will go on except the EU specifications.

• DTC No. with ~1 mark: For EU specifications

DTC No. Diagnosis Items Diagnosis contents Malfunction

evaluation

method

Warning indica-

tion

P0535/44 A/C evaporator tem-

perature sensor circuit malfunction

When malfunction takes place in the signal from the A/C evaporator temperature sensor. ;Malfunction of the sensor, or open wire or short circuit in A/C evaporator temperature sensor circuit.

1 trip (

P1105/32

Atmospheric pressure sensor circuit malfunction

When the signals from the atmospheric pressure sensor are not outputted continuously over a certain length of time after starting.

1 trip <

P1300/36

Ion current combustion control system malfunction

When malfunction takes place in the signal from Ion current combustion control system.

2 trip <

P1346/75 Variable valve timing

control system (valve timing)

When abnormalities take place two times consecutively in the valve timing control. ;Deviation of camshaft drive and driven gears

1 trip <

P1349/73 Variable valve timing

control system (advanced timing/retarded timing)

When abnormalities take place two times consecutively in the valve timing control. ;Oil control valve abnormality, admission of foreign matters in the oil passage

1 trip <

P1510/54 Starter signal system

malfunction

When abnormalities take place in the signal from the starter. ;Open wire or short circuit in the signal system

1 trip <

P1600/83 Immobilizer signal cir-

cuit malfunction

When abnormality occur in the wring and reading-out of the rolling codes into/from the immobilizer ECU during immobilizer communication.

1 trip (

P1601/81 Immobilizer signal mal-

function

When the rolling codes can not be exchanged between the EFI ECU and the immobilizer ECU or the rolling codes are not matched.

1 trip (

P1656/74 Oil control valve control

system malfunction

When malfunction takes place in the control voltage for the oil control valve.

1 trip <

U0121/86 ABS communication

failure

When the communication signal from the ABS actuator cannot be received: ;Open wire or short circuit between EFI ECU and ABS actuator.

1 trip <

U0156/87 Combination meter

communication failure

When the communication signal from the combination meter cannot be received: ;Open wire or short circuit between EFI ECU and combination meter

1 trip <

U1002/88 Communication history

error

When there is no communication establishment history with all the CAN communication making-up ECU. ;Open wire, etc. in the wiring of the CAN communication terminal of the EFI ECU.

1 trip <

B8–55

(3) Fail-safe function

1.When any of the following DTC has been detected, the EFI ECU enters the fail-safe mode in order to make it possible for the vehicle to drive for evacuation and to ensure safety. When the malfunction is remedied to a normal condition, the fail-safe control will be released.

2. However, the diagnosis results will remain memorized. Hence, it is necessary to determine whether the malfunction still persists or not.

Fail-safe specifications

Detected item Fail-safe operation Fail-specifications

Manifold absolute

pressure sensor sig-

nal system

When abnormality takes place in the signal from the intake manifold pressure/intake temperature integrated sensor (Intake manifold pressure section) :

;The pressure estimated by the throttle opening and engine revolution speed is set as the intake manifold pressure. If the signal from the throttle position sensor is also faulty, the signal from the intake manifold pressure/intake temperature integrated sensor is set at a constant value. ;If both the throttle opening angle and engine revolution speed exceed their set values, the fuel is cut.

Ignition system When malfunction takes place in the ignition signal: The fuel injection of the cylinder in which ab-

normality is taking place in the ignition signal is cut.

Water temperature

sensor signal system

When malfunction takes place in the signal from the water temperature sensor:

The signal from the water temperature sensor is set to a constant value.

Throttle position sen-

sor signal system

When malfunction takes place in the signal from the throttle position sensor:

The signal from the throttle position sensor is set to a constant value.

A/C evaporator tem-

perature sensor signal

system

When malfunction takes place in the signal from the A/C evaporator temperature sensor.

The air conditioner will be cut.

Atmospheric pressure

sensor circuit mal-

function

When malfunction takes place in the signal from the atmospheric pressure sensor:

The signal from the atmospheric pressure sensor is set to a constant value.

Knock sensor system When abnormality takes place in the signal from the

knock sensor circuit

The ignition timing is retarded.

Intake air temperature

sensor signal system

When malfunction takes place in the signal from the intake manifold pressure/intake temperature integrated sensor (Intake air temperature sennsor section):

The signal from the intake manifold pressure/intake temperature integrated sensor (Intake temperature sensor) is set to a constant value.

Stepper motor system

for ISC

When malfunction signal takes place in the stepper motor for ISC:

;The energizing control to the stepper motor for ISC is cut off. ;The fuel injection is cut off.

Oil control valve sys-

tem

When malfunction takes place in the oil control valve control voltage.

Oil control valve energizing control is prohibited.

Rear oxygen sensor

system

When malfunction takes place in the signal from the rear oxygen sensor:

The feedback control is turned to open control.

Stepper motor type

EGR valve system

When malfunction takes place in the flow rate of EGR gas. ;When the wiring to the stepper motor for EGR is disconnected or shorted.

The energizing control of the stepper motor for EGR is cancelled after the EGR valve is brought to a fully shut condition.

Immobilizer signal

circuit malfunction

;When abnormality occur in the wring and reading-out of the rolling codes into/from the immobilizer ECU during immobilizer communication. ;When the rolling codes can not be exchanged between the EFI ECU and immobilizer ECU or rolling codes are not mached.

Prohibition of fuel injection and ignition.

B8–56

7-11 TROUBLE SHOOTING ACCORDING TO MALFUNCTION PHENOMENA

7-11-1 DESCRIPTION

1.Here, checking procedures when there is no abnormal code indication of the diagnosis but there is a malfunction taking place are described.

2.As for the trouble shooting according to the malfunction phenomena, first organize the contents of the diagnosis by interview, basic check and EFI ECU circuit check results. Then, narrow down and decide the check priority of the possible causes by cross-checking it with the list of possible causes according to malfunction phenomena. On that basis, perform trouble shooting sequentially for each system and parts by following the directions provided in the list.

WARNING

• If the vehicle is driven with the SST (EFI computer check sub harness, etc.) connected, there is a possibility of causing malfunction and may be very dangerous. Therefore, remove it without fail.

NOTE

• When performing checks for each component, make sure to check the harness and connectors that are connected to it.

• As for the reason why no malfunction is detected by diagnosis even when the malfunction phenomena is reproduced, it is possible that there is a malfunction taking place out of the range of the code output conditions of the diagnosis, or there is a malfunction taking place out of the diagnosis circuit.

B8–57

7-11-2 LIST OF POSSIBLE CAUSES ACCORDING TO MALFUNCTION PHENOMENA (1) Poor startability

~: If the IG switch is turned "ON" under the condition of defective grounding of the engine earth connection (Between the 125 (E1) connection earth and the engine block), the "ENGINE fuse (10A)" can melt down.

Possible causesMalfunction

phenomena

System Components Malfunction mode

EFI ECU power supply circuit Open wire and short circuit Ignition switch

Power supply system

Main relay

Will not turn "ON"

Engine earth system

Engine earth

Open wire, defective earth

Fuel pump relay Will not turn "ON" Fuel line, Fuel filter Clogging Injector Will not inject, constant injection

Fuel system

Fuel pump Will not operate Engine fuse

Fuse melt down Ignition coil Spark plug

Will not generate sparks

Ignition system

Ignition timing Deviated Engine revolution sensor "NE signal" is not outputted.

No initial explosion

Control system

Camshaft position sensor Defective output signal Fuel pump relay Will not turn "ON" Fuel line, Fuel filter Clogging Injector Leakage, Will not inject, constant injection

Fuel system

Fuel pump Will not operate

Ignition system

Spark plug

Misfire

Intake system

Air hoses, etc.

Leakage

Intake manifold pressure/intake temperature integrated sensor Water temperature sensor

Characteristics deviated, open wire, short circuit

Engine revolution sensor Camshaft position sensor

Defective output signal

Oil control valve Malfunction

There is initial explosion but no complete explosion.

Control system

Stepper motor type EGR valve Defective closing

Intake system

Throttle body Defective opening, does not open During

cold period

Control system

Water temperature sensor Characteristics deviated, open wire, short circuit

Fuel system Injector Leakage During hot period

Intake sys-

tem

Stepper motor for ISC Defective opening, will not open

Fuel pump relay Will not turn "ON" Fuel line, Fuel filter Clogging

Fuel system

Injector Leakage Ignition system

Spark plug No smoldering

Intake system

Stepper motor for ISC Defective opening

Hard to start

At all times

Control system

Stepper motor type EGR valve Defective closing

B8–58

(2) Idling malfunction

Possible causesMalfunction

phenomena

System Components Malfunction mode Intake system

Stepper motor for ISC Defective opening, will not open Fast idle not

working

Control system

Water temperature sensor Open wire and short circuit

Air hoses, etc. Leakage Throttle body Defective closing

Intake system

Stepper motor for ISC Constantly open Intake manifold pressure/intake temperature integrated sensor Water temperature sensor

Characteristics deviated, open wire, short circuit

Throttle position sensor Characteristics deviated Defogger switch Stop lamp switch

Idling speed is high.

Control system

Heater blower signal

Constantly "ON"

Air hoses, etc.Intake sys-

tem

Throttle body

Clogging

Intake manifold pressure/intake temperature integrated sensor Water temperature sensor

Characteristics deviated

Defogger switch Stop lamp switch

Idling speed is low.

Control system

Heater blower signal

Will not turn "ON"

Air hoses, etc. Throttle body

Leakage

Intake system

Stepper motor for ISC Constantly open Intake manifold pressure/intake temperature integrated sensor

Characteristics deviated

Camshaft position sensor Defective output signal

When idling hunting takes place.

Control system

Oil control valve Malfunction Injector Leakage, Will not inject Fuel system

Fuel pump Malfunction Intake system

Throttle body Suction

Ignition coil Poor connection Ignition system

Spark plug Misfire

Intake manifold pressure/intake temperature

integrated sensor

Malfunction, poor connection

Oxygen sensor Malfunction, poor connection

Unstable idling

Control system

Stepper motor type EGR valve Defective closing

B8–59

(3) Engine stall

Possible causesMalfunction

phenomena

System Components Malfunction mode

Fuel pump relay Will not turn "ON"

Fuel line, fuel filter Clogging

Fuel system

Fuel pump Will not operate

Water temperature sensor Characteristics deviated

Camshaft position sensor Defective output signal

Oil control valve Malfunction

The engine stalls after a while from starting.

Control system

Stepper motor type EGR valve Defective closing

Intake manifold pressure/intake temperature

integrated sensor

Water temperature sensor

Characteristics deviated

Camshaft position sensor Defective output signal

The engine stalls when pressing on the accelerator.

Control system

Oil control valve Intake system

Throttle body

Malfunction

Intake manifold pressure/intake temperature

integrated sensor

Characteristics deviated

The engine stalls when releasing the accelerator.

Control system

Stepper motor type EGR valve Defective closing

When the air conditioner is turned "ON"

Intake system

Stepper motor for ISC

Constantly closed

EFI ECU power supply circuit

Ignition switch

Power supply system

Main relay

Poor connection

Intake system

Stepper motor for ISC

Constantly closed

Ignition system

Ignition coil

Poor connection

Intake manifold pressure/intake temperature

integrated sensor

Engine revolution sensor

Poor connection

The engine stalls

but can be

restarted.

Control system

Stepper motor type EGR valve Malfunction

B8–60

(4) Defective running

Possible causesMalfunction

phenomena

System Components Malfunction mode

Fuel line, fuel filter Clogging

Injector

Fuel system

Fuel pump

Flow rate decrease

Ignition coil Ignition missing

Spark plug Misfire

Ignition system

Ignition timing Deviated

Intake manifold pressure/intake temperature

integrated sensor

Water temperature sensor

Throttle position sensor

Characteristics deviated, open wire, short circuit

Knock sensor Open wire and short circuit

Hesitation takes place when accelerating.

Control system

Stepper motor type EGR valve Malfunction Fuel system Injector Flow rate decrease

Ignition coil Poor connection

Spark plug Misfire

Ignition system

Ignition timing Deviated

Intake manifold pressure/intake temperature

integrated sensor

Malfunction

Water temperature sensor Characteristics deviated

Camshaft position sensor Defective output signal

Oil control valve

Back fire, after fire

Control system

Stepper motor type EGR valve

Malfunction

Fuel line, fuel filter Fuel pressure will not rise.

Injector Flow rate decrease

Fuel system

Fuel pump Fuel pressure will not rise. Ignition system

Spark plug

Misfire

Intake manifold pressure/intake temperature

integrated sensor

Water temperature sensor

Characteristics deviated, open wire, short circuit

Throttle position sensor Characteristics deviated

Camshaft position sensor Defective output signal

Oil control valve

Insufficient output

Control system

Stepper motor type EGR valve

Malfunction

Fuel system Injector Constant injection

Intake manifold pressure/intake temperature

integrated sensor

Characteristics deviated, open wire, short circuit

Water temperature sensor

Emits black smoke.

Control system

Throttle position sensor

Characteristics deviated

Fuel line, fuel filter Clogging Fuel system

Injector Malfunction Ignition system

Ignition coil Poor connection

Throttle position sensor Characteristics deviated

Camshaft position sensor Defective output signal

Hunting takes place while running.

Control system

Oil control valve Malfunction

Intake manifold pressure/intake temperature

integrated sensor

Characteristics deviated, open wire, short circuit

Throttle position sensor Characteristics deviated

Knock sensor Characteristics deviated, open wire, short circuit

Abnormal knocking takes place.

Control system

Stepper motor type EGR valve Malfunction

B8–61

7-12 TROUBLE SHOOTING ACCORDING TO DIAGNOSIS CODE

7-12-1 DTC NO.P0105/31 MANIFOLD ABSOLUTE PRESSURE/BAROMETRIC PRESSURE CIRCUIT

MALFUNCTION

(1) System diagram

Manifold absolute pressure/intake air temperature integral type sensor connection vehicle harness side connector

EFI ECU connection vehicle harness side connector

28 29 30 31 32 33 34 35 36 37

70 71 72 73 74 75 76 77

107 108 109 110 111112

234567 21

60 61 62 63 64 65 66 67 68 69

97 98 99

100 101 102 105 106

129 130 133 134 135

22 23 24 25 26 27

103 104

131 132

38 39 40 41 42 43 44 45 46

78 79 80 81 82 83 86 87

113 114 118119

8 9 10 11 12 13

84 85

115 116 117

120

49 50 51 52 53 54 55 56 57

89 90 91 92

121 122

14 15 16 17 18 19

93 94

123 124 125 126

127

128

H11E6051S10

T11E6163S10

1 2 3 4

VCPMPIM E2PM THA

T11E6115ES20

EFI ECU

125

' (

Manifold absolute pressure / intake air temperature integral type sensor

THA

PIM

55 4

E2PM

VCPM

122

B8–62

(2) Circuit description

1.The manifold absolute pressure sensor detects the intake manifold pressure as a voltage.

2.Since the Manifold absolute pressure, intake air temperature integral type sensor (Manifold absolute pressure sensor section) does not use the atmospheric pressure as a criterion, but senses the absolute pressure inside the intake manifold (The pressure in proportion to the present absolute vacuum 0), it is not influenced by fluctuations in the atmospheric pressure due to high altitude and other factors. This permits it to control the air-fuel ratio at the proper level under all conditions.

(3) Diagnosis code output conditions

1.When the signals from the manifold absolute pressure/intake air temperature integral type sensor (Manifold absolute pressure sensor section) are not outputted continuously over a certain length of time:

NOTE

• After confirming DTC P0105/31, use the OBD @ generic scan tool or diagnosis tester (DS-21/DS-@)

to confirm the "Manifold abs. pressure" from "CURRENT DATA".

• If the ECU detects DTC P0105/31, it operates the fail-safe function, keeping the ignition timing and injection volume constant and making it possible to drive the vehicle.

(4) Trouble area

1.Open wire or short circuit in manifold absolute pressure sensor circuit

2.Manifold absolute pressure, intake air temperature integral type sensor (Manifold absolute pressure section) sensor

3.EFI ECU

(5) Checking points

1.Are the signals from the manifold absolute pressure/intake air temperature integral type sensor (Manifold absolute pressure sensor section) inputted to the EFI?

2.Is the harness between the manifold absolute pressure/intake air temperature integral type sensor (Manifold absolute pressure sensor section) and the EFI ECU normal?

3.Is the power supply voltage of the manifold absolute pressure/intake air temperature integral type sensor (Manifold absolute pressure sensor section) normal?

4.Is the output of the manifold absolute pressure/intake air temperature integral type sensor (Manifold absolute pressure sensor section) normal?

(6) Inspection procedure

1 When using diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool: èè

1. Check of output value of sensor.

1.The IG switch turned "LOCK".

2.Diagnosis tester connect the DLC. (1) In case of DS-21, connect the DS-21 diagnosis tester

to DLC through the SST.

SST: 09991-87404-000

B8–63

T11E6537T10

SST

(2) In case of DS-@, connect the DS-@ diagnosis tester

directly to DLC.

(3) In case of the OBD @ generic scan tool, connect the

OBD @ generic scan tool directly to DLC.

3.After turning "ON" the IG switch, turn "ON" the main switch of the tester.

4.Read the "Manifold abs. pressure" value of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan

tool.

SPECIFIED VALUE: Atmospheric pressure (Approx. 100 kPa)

çIf it is OK, check the EFI ECU cir

cuit.

Refer to Page A1-24.

çIf it is NG, go to

è2.

èè

2. Check of voltage of manifold absolute pressure/intake air temperature integral type sensor

1.Remove the manifold absolute pressure/intake air temperature integral type sensor connector.

2.With the IG switch turned "ON", measure the voltage between the following terminals given below. (1) Between the sensor connection vehicle harness side connector 3 (VCPM) and the sensor con-

nection vehicle harness side connector 2 (E2PM)

SPECIFIED VALUE: 4.5 - 5.5V

NOTE

• If no voltage appears, check the EFI ECU power supply circuit.

çIf it is OK, go to

è3.

çIf it is NG, check the EFI ECU circuit.

èè

3. Check of manifold absolute pressure/intake air temperature integral type sensor unit

1.Check the manifold absolute pressure/intake air temperature integral type sensor unit.

Refer to Page B8-220.

2.Are the check result OK?

çIf it is OK, go to

è4.

çIf it is NG, replace the manifold absolute pr

essure/intake air temperatur

e integral type sensor

B8–64

T11E6573T10

èè

4. Check of wire harness continuity

1.After turning "OFF" the main switch of the tester, turn "LOCK" the IG switch.

2.Check the continuity between the following terminals given below. (1) Between the sensor connection vehicle harness side connector 1 (PIM) and the EFI ECU connec-

tion vehicle harness side connector 52 (PIM)

(2) Between the sensor connection vehicle harness side connector 2 (E2PM) and the EFI ECU con-

nection vehicle harness side connector 122 (E2PM)

(3) Between the sensor connection vehicle harness side connector 3 (VCPM) and the EFI ECU con-

nection vehicle harness side connector 57 (VCPM)

SPECIFIED VALUE: Continuity exists.

çIf it is OK, r

eplace the Manifold absolute pressur

e, intake air temperature integral type sensor.

çIf it is NG, repair or replace the har

ness or connector.

B8–65

2 When not using diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool:

èè

1. EFI ECU signal check

1.Connect the SST.

SST: 09842-97209-000

2.Perform voltage measurements between the following terminals when the IG switch is "ON". (1) Between SST 52 (PIM) - 122 (E2PM)

SPECIFIED VALUE: 3.1 - 4.1 V(Room temperature)

çIf it is OK, check the EFI ECU cir

cuit.

çIf it is NG, proceed to è2.

èè

2. Check of wire harness continuity

1.Perform continuity check between each of the following terminals. (1) Between sensor connection vehicle harness side connector 1 (PIM) - ECU connection vehicle har-

ness side connector 52 (PIM)

(2) Between sensor connection vehicle harness side connector 2 (E2PM) - ECU connection vehicle

harness side connector 122 (E2PM)

(3) Between sensor connection vehicle harness side connector 3 (VCPM) - ECU connection vehicle

harness side connector 57 (VCPM)

SPECIFIED VALUE: Continuity exists.

çIf it is OK, pr

oceed to

è3.

çIf it is NG, repair the harness and connectors.

èè

3. Intake manifold pressure/intake temperature integrated sensor voltage check

1.Remove the connector of the intake manifold pressure/intake temperature integrated sensor.

2.Perform voltage measurement between the following terminals when the IG switch is "ON". (1) Between sensor connection vehicle harness side connector 3 (VCPM) - sensor connection vehicle

harness side connector 2 (E2PM)

SPECIFIED VALUE: 4.5 - 5.5V

çIf it is OK, pr

oceed to è4.

çIf it is NG, check the EFI ECU circuit.

Refer to Page A1-24.

èè

4. Intake manifold pressure/intake temperature integrated sensor unit check

1.Perform unit check of the intake manifold pressure/intake temperature integrated sensor.

Refer to Page B8-220.

2.Are the check result OK?

çIf it is OK, check the connecting condition of each connector

çIf it is NG, replace the intake manifold pressure/intake temperature integrated sensor.

B8–66

7-12-2 DTC NO.P0110/43 INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT MALFUNCTION (1) System diagram

Manifold absolute pressure/intake air temperature integral type sensor connection vehicle harness side connector

EFI ECU connection vehicle harness side connector

28 29 30 31 32 33 34 35 36 37

70 71 72 73 74 75 76 77

107 108 109 110 111112

234567 21

60 61 62 63 64 65 66 67 68 69

97 98 99

100 101 102 105 106

129 130 133 134 135

22 23 24 25 26 27

103 104

131 132

38 39 40 41 42 43 44 45 46

78 79 80 81 82 83 86 87

113 114 118119

8 9 10 11 12 13

84 85

115 116 117

120

49 50 51 52 53 54 55 56 57

89 90 91 92

121 122

14 15 16 17 18 19

93 94

123 124 125 126

127

128

H11E6051S10

T11E6163S10

1 2 3 4

VCPMPIM E2PM THA

T11E6115ES20

EFI ECU

125

' (

Manifold absolute pressure / intake air temperature integral type sensor

THA

PIM

55 4

E2PM

VCPM

122

B8–67

(2) Circuit description

1.The Manifold absolute pressure, intake air temperature integral type sensor (Intake air temperature sensor section), which detects the intake air temperature, is located at the intake manifold. A thermistor built in the sensor changes the resistance value according to the intake air temperature. The lower the intake air temperature, the greater the thermistor resistance value, and the higher the manifold absolute pressure, intake air temperature integral type sensor (Intake air temperature sensor section), the lower the thermistor resistance value. When the resistance value of the manifold absolute pressure, intake air temperature integral type sensor (Intake air temperature sensor section) changes in accordance with changes in the intake air temperature, the potential at terminal THA also changes. Based on this signal, the EFI ECU increases the fuel injection volume to improve driveability during cold engine operation.

(3) Diagnosis code output conditions

1.When the signals from the manifold absolute pressure/intake air temperature integral type sensor (Intake air temperature sensor section) are not outputted continuously after starting over a certain length of time:

(4) Trouble area

1.Open wire or short circuit in the Manifold absolute pressure, intake air temperature integral type sensor (Intake air temperature sensor section) circuit

2.Manifold absolute pressure, intake air temperature integral type sensor (Intake air temperature sensor section)

3.EFI ECU

(5) Checking points

1.Are the signals from the intake manifold pressure/intake air temperature integral type sensor (Intake air temperature sensor section) inputted to the EFI ECU?

2.Is the harness between the manifold absolute pressure/intake air temperature integral type sensor (Manifold absolute pressure sensor section) and the EFI ECU normal?

3.Is the output of the manifold absolute pressure/intake air temperature integral type sensor (Intake air temperature sensor section) normal?

B8–68

Low

High

Temperature

Low

High

Resistance

L21E3745ET15

(6) Inspection procedure

1 When using diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool: èè

1. Check of sensor output value.

1.The IG switch turned "LOCK".

2.Connect the diagnosis tester to DLC. (1) In case of DS-21, connect the DS-21 diagnosis tester

to DLC through the SST.

SST: 09991-87404-000

(2) In case of DS-@, connect the DS-@ diagnosis tester

directly to DLC.

(3) In case of the OBD @ generic scan tool, connect the

OBD @ generic scan tool directly to DLC.

3.After turning "ON" the IG switch, Turn "ON" the main switch of the tester.

4.Read the "Intake air temperature" of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

SPECIFIED VALUE: Measured ambient temperature

çIf it is OK, check the EFI ECU cir

cuit.

Refer to Page A1-24.

çIf it is NG, go to

è2.

èè

2. Confirmation of IAT sensor output value.

1.Read the "Intake air temperature" of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

çWhen

(40°C, go to è3.

çWhen 140°C or above, go to è5.

èè

3. Check of open wire in harness or inside EFI ECU (1).

1.After turning "OFF" the main switch of the tester, turn "LOCK" the IG switch.

2.Remove the manifold absolute pressure/intake air temperature integral type sensor connector.

3.Short circuit between the following terminals given below, using SST.

SST: 09991-87103-000

B8–69

T11E6537T10

SST

T11E6573T10

(1) Between the sensor connection vehicle harness side

connector 4 (THA) and the sensor connection vehicle harness side connector 2 (E2PM)

4.After turning "ON" the IG switch, turn "ON" the main switch of the tester. Read the "Intake air temperature" of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

SPECIFIED VALUE: 140°C or above

çIf it is OK, car

ry out the following operations given

below.

(1) Check the connector or the connection state of the ter-

minal of the manifold absolute pressure/intake air temperature integral type sensor.

(2) If there is no abnormality, replace the manifold

absolute pressure/intake air temperature integral type sensor.

çIf it is NG, go to

è4.

èè

4. Check of open wire in harness or inside EFI ECU (2).

1.After turning "OFF" the main switch of the tester, turn "LOCK" the IG switch.

2.Set the SST (Sub-harness).

SST: 09842-97209-000

3.Release the short circuit of the connector of the manifold absolute pressure/intake air temperature integral type sensor.

4.Short circuit between the following terminals given below. (1) Between SST 55 (THA) and 122 (E2PM)

5.After turning "ON" the IG switch, turn "ON" the main switch of the tester. Read the "Intake air temperature" of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

SPECIFIED VALUE: 140°C or above

çIf it is OK, the har

ness between the manifold absolute pressure, intake air temperature integral type sensor (Intake air temperature sensor section) and the EFI ECU is open. Repair or replace the harness.

çIf it is NG, check the ECU connector or terminal for connecting condition. If they are satisfactory,

replace the EFI ECU.

Refer to Page B8-1.

èè

5. Check of short in harness or inside EFI ECU (1).

1.After turning "OFF" the main switch of the tester, turn "LOCK" the IG switch.

2.Disconnect the connector of the manifold absolute pressure, intake air temperature integral type sensor.

3.After turning "ON" the IG switch, turn "ON" the main switch of the tester.

4.Read the "Intake air temperature " of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

SPECIFIED VALUE: (40°C

çIf it is OK, r

eplace the manifold absolute pressure, intake air temperature integral type sensor.

çIf it is NG, go to è6.

B8–70

T11E6552T10

SST

èè

6. Check of short in harness or inside EFI ECU (2).

1.Perform continuity check between each of the following terminals. (1) Between sensor connection vehicle harness side connector 2 (E2PM) - ECU connection vehicle

harness side connector 122 (E2PM)

(2) Between sensor connection vehicle harness side connector 4 (THA) - ECU connection vehicle har-

ness side connector 55 (THA)

SPECIFIED VALUE: Continuity exists.

çIf it is OK, r

epair or replace the har

ness or connector.

çIf it is NG, check or replace the EFI ECU.

B8–71

2 When not using diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool:

èè

1. EFI ECU voltage check

1.Connect the SST.

SST: 09842-97209-000

2.Perform voltage measurement between the following terminals when the IG switch is "ON". (1) Between SST 55 (THA) - 122 (E2PM)

SPECIFIED VALUE: 0.15 V - 4.85 V (Changes according to the intake temperature)

çIf it is OK, check the EFI ECU cir

cuit.

çIf it is NG, proceed to è2.

èè

2. Check of wire harness continuity

1.Perform continuity check between each of the following terminals. (1) Between sensor connection vehicle harness side connector 2 (E2PM) - ECU connection vehicle

harness side connector 122 (E2PM)

(2) Between sensor connection vehicle harness side connector 4 (THA) - ECU connection vehicle har-

ness side connector 55 (THA)

SPECIFIED VALUE: Continuity exists.

çIf it is OK, pr

oceed to è3.

çIf it is NG, repair the harness and connectors.

èè

3. Intake manifold pressure/intake temperature integrated sensor unit check

1.Perform unit check of the intake manifold pressure/intake temperature integrated sensor.

Refer to Page B8-220.

2.Are the check result OK?

çIf it is OK, check the connecting condition of each connector

çIf it is NG, r

eplace the intake manifold pressure/intake temperature integrated sensor.

B8–72

7-12-3 DTC NO.P0115/42 ENGINE COOLANT TEMPERATURE SENSOR (ECT) CIRCUIT MALFUNC-

TION

(1) System diagram

Water temperature sensor connection vehicle harness side connector

EFI ECU connection vehicle harness side connector

(2) Circuit description

1.A thermistor built into the engine coolant temperature sensor changes the resistance valve according to the engine coolant temperature. The structure of the sensor and connection to the EFI ECU is the same as in the DTC P0110/43 (Intake air temparature sensor circuit malfunction).

(3) Diagnosis code output conditions

1.When the signals from the water temperature sensor are not outputted continuously after starting over a certain length of time:

28 29 30 31 32 33 34 35 36 37

70 71 72 73 74 75 76 77

107 108 109 110 111112

234567 21

60 61 62 63 64 65 66 67 68 69

97 98 99

100 101 102 105 106

129 130 133 134 135

22 23 24 25 26 27

103 104

131 132

38 39 40 41 42 43 44 45 46

78 79 80 81 82 83 86 87

113 114 118119

8 9 10 11 12 13

84 85

115 116 117

120

49 50 51 52 53 54 55 56 57

89 90 91 92

121 122

14 15 16 17 18 19

93 94

123 124 125 126

127

128

H11E6051S10

T11E6166S10

THWE2

T11E6118ES20

EFI ECU

Water temperature sensor

THW

125

B8–73

(4) Trouble area

1.Open wire or short circuit in the engine coolant temperature sensor circuit

2.Engine coolant temperature sensor

3.EFI ECU

(5) Checking points

1.Are the signals from the water temperature sensor inputted to the EFI ECU?

2.Is the harness between the water temperature sensor and the EFI ECU normal?

3.Is the output of the water temperature sensor normal?

(6) Inspection procedure 1 When using diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool:

NOTE

• Read the freeze frame data, using the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

Because the freeze frame data records the engine conditions when the malfunction was detected, when troubleshooting the freeze frame data is useful to determine whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel ratio lean or rich, etc. at the time of the malfunction.

èè

1. Check of output value of sensor.

1.The IG switch turned "LOCK".

2.Connect the diagnosis tester to DLC. (1) In case of DS-21, connect the DS-21 diagnosis tester

to DLC through the SST.

SST: 09991-87404-000

(2) In case of DS-@, connect the DS-@ diagnosis tester

directly to DLC.

(3) In case of the OBD @ generic scan tool, connect the

OBD @ generic scan tool directly to DLC.

3.After turning "ON" the IG switch, turn "ON" the main switch of the tester.

4.Read the "Engine coolant temperature" of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

SPECIFIED VALUE: The same as the actual engine cooling water temperature

çIf it is OK, check the EFI ECU cir

cuit.

çIf it is NG, go to è2.

èè

2. Confirmation of sensor output value.

1.Read the "Engine coolant temperature" of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

çWhen

(40°C, go to è3.

çWhen 140°C or above, go to è5.

B8–74

T11E6537T10

SST

T11E6573T10

èè

3. Check of open wire in harness or inside EFI ECU (1).

1.After turning "OFF" the main switch of the tester, turn "LOCK" the IG switch.

2.Disconnect the connector of the engine coolant temperature sensor.

3.Short circuit between the following terminals given below, using SST. (1) Between the water temperature sensor connection

vehicle harness side connector 1 (E2) and the water temperature sensor connection vehicle harness side connector 2 (THW)

SST: 09991-87103-000

4.After turning "ON" the IG switch, turn "ON" the main switch of the tester.

5.Read the "Engine coolant temperature" of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

SPECIFIED VALUE: 140°C or above.

çIf it is OK, check the engine coolant temperatur

e sensor

sensor connector or ter

minal for connecting condition. If they are satisfactory, replace the engine coolant temperature sensor sensor.

Refer to Page B8-7.

çIf it is NG, go to

è4.

èè

4. Check of open wire in harness or inside EFI ECU (2).

1.After turning "OFF" the main switch of the tester, turn "LOCK" the IG switch.

2.Set the SST (Sub-harness).

SST: 09842-97209-000

3.Disconnect the jump wire from the engine coolant temperature sensor sensor connector.

4.Short circuit between the following terminals given below. (1) Between SST 54 (THW) and 19 (E2)

5.After turning "ON" the IG switch, turn "ON" the main switch of the tester.

6.Read the "Engine coolant temperature" of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

SPECIFIED VALUE: 140°C or above?

çIf it is OK, the har

ness between the engine coolant temperature sensor sensor and the EFI ECU is

open. Repair or replace the har

ness.

çIf it is NG, check the EFI ECU connector and terminal for connecting condition. If they are satisfac-

tory, replace the EFI ECU.

Refer to Page B8-1.

B8–75

T11E6542T10

SST

èè

5. Check of short in harness or inside EFI ECU (1).

1.After turning "OFF" the main switch of the tester, turn "LOCK" the IG switch.

2.Disconnect the connector of the engine coolant temperature sensor sensor.

3.After turning "ON" the IG switch, turn "ON" the main switch of the tester.

4.Read the "Engine coolant temperature" of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan

tool.

SPECIFIED VALUE: (40°C

çIf it is OK, r

eplace the engine coolant temperature sensor

Refer to Page B8-7.

çIf it is NG, go to è6.

èè

6. Check of short in harness or inside EFI ECU (2).

1.Perform continuity check between each of the following terminals. (1) Between sensor connection vehicle harness side connector 1 (E2) - ECU connection vehicle har-

ness side connector 19 (E2)

(2) Between sensor connection vehicle harness side connector 2 (THW) - ECU connection vehicle har-

ness side connector 54 (THW)

SPECIFIED VALUE: Continuity exists.

çIf it is OK, r

epair or replace the harness or connector.

çIf it is NG, check or r

eplace the EFI ECU.

2 When not using diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool:

èè

1. EFI ECU signal check

1.Connect the SST.

SST: 09842-97209-000

2.Perform voltage measurement between the following terminals when the IG switch is "ON". (1) Between SST 54 (THW) - 19 (E2)

SPECIFIED VALUE: 0.15 V - 4.85 V(Changes according to the water temperature)

çIf it is OK, check the EFI ECU cir

cuit.

Refer to Page A1-24.

çIf it is NG, proceed to è2.

èè

2. Check of wire harness continuity

1.Perform continuity check between each of the following terminals. (1) Between sensor connection vehicle harness side connector 1 (E2) - ECU connection vehicle har-

ness side connector 19 (E2)

(2) Between sensor connection vehicle harness side connector 2 (THW) - ECU connection vehicle har-

ness side connector 54 (THW)

SPECIFIED VALUE: Continuity exists.

çIf it is OK, pr

oceed to è3.

çIf it is NG, repair the harness and connectors.

B8–76

èè

3. Water temperature sensor unit check

1.Perform unit check of the water temperature sensor.

Refer to Page B8-221.

2.Are the check result OK?

çIf it is OK, check the connecting condition of each connector

çIf it is NG, replace the water temperature sensor.

Refer to Page B8-7.

B8–77

7-12-4 DTC NO.P0120/41 THROTTLE/PEDAL POSITION SENSOR (1) System diagram

Throttle position sensor connection vehicle harness side connector

EFI ECU connection vehicle harness side connector

(2) Circuit description

1.The throttle position sensor is mounted in the throttle body and detects the throttle valve opening angle. When the throttle valve is fully closed, a voltage of approximately 0.4 - 0.8 V is applied to terminal VTH of the EFI ECU. The voltage applied to the terminals VTH of the EFI ECU increases in proportion to the opening angle of the throttle valve and becomes approximately 3.5 - 5.0 V when the throttle valve is fully opened. The EFI ECU judges the vehicle driving conditions from these signals input from terminal VTH, uses them as one of the conditions for deciding the air-fuel ratio correction, power increase correction and fuel-cut control etc.

28 29 30 31 32 33 34 35 36 37

70 71 72 73 74 75 76 77

107 108 109 110 111112

234567 21

60 61 62 63 64 65 66 67 68 69

97 98 99

100 101 102 105 106

129 130 133 134 135

22 23 24 25 26 27

103 104

131 132

38 39 40 41 42 43 44 45 46

78 79 80 81 82 83 86 87

113 114 118119

8 9 10 11 12 13

84 85

115 116 117

120

49 50 51 52 53 54 55 56 57

89 90 91 92

121 122

14 15 16 17 18 19

93 94

123 124 125 126

127

128

H11E6051S10

1 32

VTH

H11E6022S10

T11E6117ES20

EFI ECU

VTH

Throttle position sensor

125

56 1

B8–78

(3) Diagnosis code output conditions

1.When the signals from the throttle position are not outputted continuously after starting over a certain length of time.

(4) Trouble area

1.Open wire or short circuit in the throttle position sensor circuit.

2.Throttle position sensor

3.EFI ECU

(5) Checking points

1.Are the signals from the throttle position sensor inputted to the EFI ECU?

2.Is the harness between the throttle position sensor and the EFI ECU normal?

3.Is the power supply voltage of the throttle position sensor normal?

4.Is the output of the throttle position sensor normal?

(6) Inspection procedure

1 When using diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool: èè

1. Check of output value of sensor.

1.The IG switch turned "LOCK".

2.Connect the diagnosis tester to DLC. (1) In case of DS-21, connect the DS-21 diagnosis tester

to DLC through the SST.

SST: 09991-87404-000

(2) In case of DS-@, connect the DS-@ diagnosis tester

directly to DLC.

(3) In case of the OBD @ generic scan tool, connect the

OBD @ generic scan tool directly to DLC.

3.After turning "ON" the IG switch, turn "ON" the main switch of the tester.

4.Read the "Abs. throttle position SSR" of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

5.Are the check results OK?

çIf it is OK, check the EFI ECU cir

cuit.

Refer to Page A1-24.

çIf it is NG, go to

è2.

Throttle valve Throttle valve opening [%]

Fully closed 0.0

Fully open 100.0

B8–79

T11E6537T10

SST

T11E6573T10

èè

2. Check of power supply voltage.

1.After turning "OFF" the main switch of the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool,

turn "LOCK" the IG switch.

2.Disconnect the connector of the throttle position sensor.

3.With the IG switch turned "ON", measure the voltage between the following terminals given below. (1) Between the throttle position sensor connection vehicle harness side connector 1 (VC) and the

body earth

SPECIFIED VALUE: 4.5 - 5.5V

4.Is the voltage within the specified value?

çIf it is OK, go to

è3.

çIf it is NG, go to è5.

èè

3. Check of linear throttle sensor.

Refer to Page B8-222.

1.Are the check results OK?

çIf it is OK, go to

è4.

çIf it is NG, replace the throttle body Ay.

Refer to Page B3-3.

èè

4. Check of input signal.

1.Set the SST (Sub-harness).

SST: 09842-97209-000

2.The IG switch turned "ON".

3.Measure the voltage between the SST connector 53 (VTH) and 19 (E2) under the following condition given below.

4.Is the measured value within the specified value?

çIf it is OK, check or r

eplace the EFI ECU.

çIf it is NG, check between the following terminals for open wire or short.

(1) Between the EFI ECU and the throttle position sensor (VTH line)

Throttle valve Specified value [V]

Fully closed 0.4 - 0.8

Fully open 3.2 - 5.0

B8–80

èè

5. Check of power supply voltage ECU side.

1.Turn "LOCK" the IG switch.

2.Set the SST (Sub-harness).

SST: 09842-97209-000

3.The IG switch turned "ON".

4.Check the voltage between the following terminals given below. (1) Between SST 56 (VC) and 19 (E2)

SPECIFIED VALUE: 4.5 - 5.5V

5.Is the measured value within the specified value?

NOTE

• If no voltage appears, check the EFI ECU power supply circuit.

çIf it is OK, check between the following ter

minals for open wire or short.

(1) Between the EFI ECU and the throttle position sensor (VC line)

çIf it is NG, check or r

eplace the EFI ECU.

B8–81

2 When not using diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool:

èè

1. EFI ECU signal check

1.Connect the SST.

SST: 09842-97209-000

2.Turn the IG switch to the "ON" position.

3.Perform voltage measurements between the following terminals. (1) Between SST 56(VC) - 19 (E2) (2) Between SST 53(VTH) - 19 (E2)

SPECIFIED VALUE:

çIf it is OK, check the EFI ECU cir

cuit.

Refer to Page A1-24.

çIf it is NG, pr

oceed to

è2.

èè

2. Check of wire harness continuity

1.Perform continuity check between each of the following terminals. (1) Between sensor connection vehicle harness side connector 1 (VC) - ECU connection vehicle har-

ness side connector 56 (VC)

(2) Between sensor connection vehicle harness side connector 2 (E2) - ECU connection vehicle har-

ness side connector 19 (E2)

(3) Between sensor connection vehicle harness side connector 3 (VTH) - ECU connection vehicle har-

ness side connector 53 (VTH)

SPECIFIED VALUE: Continuity exists.

çIf it is OK, pr

oceed to

è3.

çIf it is NG, repair the harness and connectors.

èè

3. Throttle position sensor unit check

1.Perform unit check of the throttle position sensor.

Refer to Page B8-222.

2.Are the check result OK?

çIf it is OK, check the connecting condition of each connector

çIf it is NG, r

eplace the throttle body Ay.

Refer to Page B3-3.

Measuring terminals Specified value

56(VC) - 19(E2) 4.5 - 5.5V

53(VTH) - 19(E2)

It increases in proportion to the throttle opening in the range of 0.2V - 4.8V when the

throttle lever is fully opened from the fully closed state.

B8–82

7-12-5 DTC NO.P0130/21 OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 1 SENSOR 1) (1) System diagram

Oxygen sensor connection vehicle harness side connector

EFI ECU connection vehicle harness side connector

(2) Circuit description

1.The front oxygen sensor (Bank 1, sensor 1) detects the concentration of oxygen contained in the exhaust gas according to the magnitude of the electromotive force that is being generated in itself. When the air-to-fuel ratio becomes richer than the stoichiometric ratio, a greater electromotive force (Approx. 1 volt) is applied to the EFI ECU. Conversely, when the ratio becomes leaner than the stoichiometric ratio, a smaller electromotive force (Approx. 0 volt) is applied to the EFI ECU. In this way, the EFI ECU determines whether the air-to-fuel ratio is rich or lean. Based on this evaluation, the injection time is controlled.

28 29 30 31 32 33 34 35 36 37

70 71 72 73 74 75 76 77

107 108 109 110 111112

234567 21

60 61 62 63 64 65 66 67 68 69

97 98 99

100 101 102 105 106

129 130 133 134 135

22 23 24 25 26 27

103 104

131 132

38 39 40 41 42 43 44 45 46

78 79 80 81 82 83 86 87

113 114 118119

8 9 10 11 12 13

84 85

115 116 117

120

49 50 51 52 53 54 55 56 57

89 90 91 92

121 122

14 15 16 17 18 19

93 94

123 124 125 126

127

128

H11E6051S10

T11E6158S10

OXH1

OX1

T11E6111ES20

EFI ECU

OX1

OXH1

125 19

123

2 4

Oxygen sensor

To main relay

B8–83

(3) Diagnosis code output conditions

1.When no rich signal is sent even once from the oxygen sensor even if the condition continues in which the engine revolution speed is more than 3000 rpm and the power increase compensation is continued over the specified value after the engine warming-up

(4) Trouble area

1.Air induction system

2.Fuel pressure

3.Injector

4.Open wire or short circuit in the oxygen sensor circuit

5.Oxygen sensor

6.EFI ECU

(5) Checking points

NOTE

• When this code is outputted concurrently with another code, carry out the check for that code first.

1.Is the signal from the oxygen sensor inputted to the EFI ECU?

2.Is the harness between the oxygen sensor and the EFI ECU normal?

3.Is the output of the oxygen sensor correct? (If there are no causes for "Lean A/F" (The oxygen concentration in the exhaust gas is too high), the oxygen sensor is judged as defective.)

4.Check the oxygen sensor heater system for open wire or short.

NOTE

• Sensor 1 means a sensor which is located near the engine block.

• Using the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool, confirm the output voltage of

the oxygen sensor (Bank 1, sensor 1) from the current data. If the output voltage of the oxygen sensor (Bank 1, sensor 1) is 0.1 V or less, most likely the circuit of the oxygen sensor (Bank 1, sensor 1) is open or shorted.

B8–84

Confirmation engine racing pattern (For EU specifications)

(1) Step 1; Using the DS-21, with the IG switch turned "LOCK", connect the DS-21 diagnosis tester to

DLC through the SST. Turn "ON" the IG switch and the main switch of the tester. Set the tester to the "Continuous monitoring results" of the CARB mode.

SST: 09991-87404-000

(2) Step 1; Using DS-@, with the IG switch turned "LOCK", connect the DS-@ diagnosis tester to DLC.

Turn "ON" the IG switch and the main switch of the tester. Set the tester to the "Continuous monitoring results" of the CARB mode.

(3) Step 2; Start the engine. Keep on warming the engine for more than five minutes until the engine

cooling water temperature reaches 90°C or above.

(4) Step 3; Race the engine for about three minutes at 2500 to 3000 rpm. (5) Step 4; After one minute of idling, press the F1 key of the tester. Check to see if the DTC P0130/21

is outputted.

NOTE

• If the condition in this test is not strictly followed, detection of the malfunction will not be possible.

• If you do not have the diagnosis tester (DS-21/DS-@), turn the ignition switch "LOCK" after perform-

ing steps 2 to 4, then perform steps 2 to 4 again.

C13E5562ES10

Engine speed

2,500 - 3,000 rpm

Idling

IG SW OFF

Warmed up 3 min. or so

Time

B8–85

(6) Inspection procedure 1 When using diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool:

NOTE

• Read the freeze frame data, using the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

èè

1. Check of DTC.

1.Check other codes (Those other than DTC P0130/21) outputted?

çIf an output is made, pr

oceed to the tr

ouble shooting for the outputted code concerned.

çIf no output is made, proceed to è2.

èè

2. Wiring harness check

1.With the IG switch turned "LOCK", set the SST (Sub-harness). However, the SST connectors at the EFI ECU side should remain disconnected.

SST: 09842-97209-000

2.Disconnect the oxygen sensor connector.

3.Check the harness and connector between the following terminals for open wire and short. (1) Between the sensor connection vehicle harness side connector 3 (OX1) and SST 123 (OX1)

SPECIFIED VALUE: Continuity exists.

(2) Between the sensor connection vehicle harness side connector 3 (OX1) and the body earth

SPECIFIED VALUE: No continuity exists

4.Are the check results for open wire and short OK?

çIf it is OK, go to

è3.

çIf it is NG, repair or replace the harness or connector.

èè

3. Check of output voltage of sensor.

1.Connect the oxygen sensor and SST connectors, respectively.

2.Connect the diagnosis tester to DLC. (1) In case of DS-21, connect the DS-21 diagnosis tester

to DLC through the SST.

SST: 09991-87404-000

B8–86

T11E6537T10

SST

(2) In case of DS-@, connect the DS-@ diagnosis tester

directly to DLC.

(3) In case of the OBD @ generic scan tool, connect the

OBD @ generic scan tool directly to DLC.

3.Turn "ON" the main switch of the tester.

4.Warm up the engine at 2500 rpm for about 90 seconds.

5.Check the output voltage of oxygen sensor during idling.

SPECIFIED VALUE: The voltage varies repeatedly between a range from a voltage below 0.3 V and

to a voltage above 0.6 V. (See the diagram below.)

6.Are the check results OK?

çIf it is OK, in the case of the EU specification vehicles, go to

è10. çIf it is OK, in the case of the general specification vehicles, go to è11. çIf it is NG, in the case of the EU specification vehicles, proceed to è4. çIf it is NG, in the case of the general specification vehicles, pr

oceed to

è5.

èè

4. Check of misfire.

1.Check to see if any misfire is occurring by monitoring the DTC and data list.

2.Are the check results OK?

çIf it is OK, go to

è5.

çIf it is NG, per

form troubleshooting for misfire. (Go to troubleshooting of DTC P0300/17, P0301 -

0304/17.)

Refer to Page B8-161.

èè

5. Check of air induction system.

1.Check the following items given below: (1) Check of the engine oil level gauge, oil filler cap and PCV hose for disconnection. (2) Check of parts of the air induction system between the cylinder head and the throttle body for dis-

connection, looseness, or cracks.

2.Are the check results OK?

çIf it is OK, go to

è6.

çIf it is NG, r

epair or replace the induction system.

C13E5555S10

0.6

0.3

OK NG NG NG

B8–87

T11E6573T10

èè

6. Check of fuel pressure.

1.Check the fuel pressure.

Refer to Page B8-219.

2.Are the check results OK?

çIf it is OK, go to

è7.

çIf it is NG, check and repair fuel pump, fuel pipe line and filter.

èè

7. Check of injector injection.

1.Check the injector unit.

Refer to Page B8-224.

2.Are the check results OK?

çIf it is OK, go to

è8.

çIf it is NG, replace the injector.

Refer to Page B7-11.

èè

8. Check of gas leakage of exhaust system.

1.Check that there is no gas leakage in the exhaust gas-related system.

Refer to Page B1-10.

2.Are the check results OK?

çIf it is OK, go to

è9.

çIf it is NG, repair or replace the defective point.

èè

9. Check of output voltage of sensor.

1.Warm up engine completely.

2.Disconnect the connector of the oxygen sensor with IG switch turned "LOCK".

3.Disconnect the oxygen sensor connector.

4.Connect a voltmeter to the connector terminal of oxygen sensor.

5.Hold the engine racing speed for 3 minutes at 2000 rpm. At this time, ensure that the reading of the volt meter is within the specified value.

SPECIFIED VALUE: The voltmeter exhibits an output voltage of 0.2 V or more at least one time.

6.Are the check results OK?

çIf it is OK, check or r

eplace the EFI ECU.

çIf it is NG, replace the oxygen sensor

. (Bank 1, sensor 1)

Refer to Page B4-1.

èè

10. Perform confirmation engine racing pattern.

1.Again conduct the check of engine racing pattern.

2.Confirm whether Code No. P0133/21has been outputted again.

çIf it is OK, check or r

eplace the EFI ECU.

çIf it is NG, go to è11.

B8–88

èè

11. The past situation of vehicles operation is investigated.

1.Confirm the past vehicle running situation.

2.Did the vehicle run out of fuel in the past?

çIf it is YES, DTC P0130/21 is caused by r

unning out of fuel.

çIf it is NO, check the EFI ECU circuit.

Refer to Page A1-24.

B8–89

2 When using diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool:

èè

1. Oxygen sensor feedback control check

1.Start the engine.

2.Activate the oxygen sensor by maintaining the engine at 3000rpm for four minutes.

3.Connect the SST and short- circuit the EFI-T terminal.

SST: 09991-87404-000(1)

SST: 09991-87403-000(2)

4.Maintain the engine revolution speed at 2000rpm or more and step on the brake pedal.

5.Check if the engine check lamp in the meter blinks.

SPECIFIED VALUE: It blinks.

NOTE

• The blinking interval will change by the condition of activation of the oxygen sensor.

çIf it is OK, the oxygen sensor system is nor

mal.

çIf it is NG, proceed to è2.

èè

2. Oxygen sensor signal check

1.Connect the SST.

SST: 09842-97209-000

2.Activate the oxygen sensor by maintaining the engine at 3000rpm for four minutes.

3.Perform output check between the following terminals using an oscilloscope. (1) Between SST 123 (OX1) - SST 125 (E1)

Air conditioner "OFF": Conditions in which all of the air conditioner switch (ACSW), blower switch (BLW) and magnet clutch (MGC) are "OFF".

NOTE

• The waveform cannot be specified, but ensure that a waveform as in the right figure (One such example) shows up.

4.Confirm the following points. (1) The waveform is showing up with the oxygen sensor

activated.

(2) The waveform 0 # 1V is showing up.

NOTE

• As for the oxygen sensor signal, the correct output cannot be confirmed without using the oscilloscope.

çIf it is OK, pr

oceed to è3.

çIf it is NG, replace the oxygen sensor.

Refer to Page B4-1.

Time axis 200ms / DIV

Voltage axis 500mV / DIV

Measuring condition

Air conditioner "OFF", no electric load,

maintaining 3000rpm

B8–90

T11E6538ET10

Earth

EFI-T terminal

SST (2)

SST (1)

T11E6241T10

èè

3. Check of wire harness continuity

1.Perform continuity check between each of the following terminals. (1) Between sensor connection vehicle side connector 3 (OX1) - ECU connection vehicle harness con-

nection side connector 123 (OX1)

(2) Between sensor connection vehicle side connector 4 (E2) - ECU connection vehicle harness con-

nection side connector 19 (E2)

çIf it is OK, r

eplace the EFI ECU.

Refer to Page B8-1.

çIf it is NG, per

form checking or r

epairing of the harness of the defective sections.

B8–91

7-12-6 DTC NO.P0135/23 OXYGEN SENSOR HEATER CIRCUIT MALFUNCTION DTC NO.P0141/24 REAR OXYGEN SENSOR HEATER CIRCUIT MALFUNCTION (1) System diagram 1 For EU specifications

Oxygen sensor connection vehicle harness side connector

T11E6525ES10

OXH1

OX1

Front oxygen sensor connection vehicle harness side connector

Rear oxygen sensor connection vehicle harness side connector

OXH2

OX2

EFI ECU

F/L

Main relay

Front oxygen sensor heater

Front oxygen sensor

Rear oxygen sensor heater

Rear oxygen sensor

OXH1

Fuse EFI (15A)

125

MRO

Battery

OX1

123

OXH2

OX2

T11E6512ES20

B8–92

2 For general specifications

Oxygen sensor connection vehicle harness side connector

EFI ECU connection vehicle harness side connector

(2) Diagnosis code output conditions

1.When an open wire or short is present in the oxygen sensor heater system,

(3) Trouble area

1.Open wire or short circuit for the oxygen sensor heater circuit

2.Oxygen sensor heater

3.EFI ECU

28 29 30 31 32 33 34 35 36 37

70 71 72 73 74 75 76 77

107 108 109 110 111112

234567 21

60 61 62 63 64 65 66 67 68 69

97 98 99

100 101 102 105 106

129 130 133 134 135

22 23 24 25 26 27

103 104

131 132

38 39 40 41 42 43 44 45 46

78 79 80 81 82 83 86 87

113 114 118119

8 9 10 11 12 13

84 85

115 116 117

120

49 50 51 52 53 54 55 56 57

89 90 91 92

121 122

14 15 16 17 18 19

93 94

123 124 125 126

127

128

H11E6051S10

T11E6158S10

OXH1

OX1

T11E6111ES20

EFI ECU

OX1

OXH1

125 19

123

2 4

Oxygen sensor

To main relay

B8–93

(4) Checking points

NOTE

• When this code is outputted concurrently with another code, carry out the check for that code first.

1.Is the signal from the oxygen sensor inputted to the EFI ECU?

2.Is the harness between the oxygen sensor and the EFI ECU normal?

3.Is the output of the oxygen sensor correct? (If there are no causes for "Lean A/F" (The oxygen concentration in the exhaust gas is too high), the oxygen sensor is judged as defective.)

4.Check the oxygen sensor heater system for open wire or short.

(5) Inspection procedure

NOTE

• Read the freeze frame data, using the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool.

èè

1. Check of output voltage of ECU.

1.Set the SST (Sub-harness).

SST: 09842-97209-000

2.Conduct the voltage measurement between the next terminals under the following conditions given below. (1) Between SST 15 (OXH1) and the body earth (2) Between SST 14 (OXH2) and the body earth

3.Are the check results OK?

çIf it is OK, check or r

eplace the EFI ECU.

çIf it is NG, go to è2.

èè

2. Unit check of oxygen sensor.

1.Check the front and rear oxygen sensor heater units. (1) Front oxygen sensor

Refer to Page B8-221.

(2) Rear oxygen sensor

Refer to Page B8-222.

2. Are the unit check results OK?

çIf it is OK, check the har

ness and connector between the following terminals for open wire and short. (1) Between the main relay and the EFI ECU (2) Between the front oxygen sensor and the EFI ECU (3) Between the rear oxygen sensor and the EFI ECU

çIf it is NG, r

eplace the defective oxygen sensor.

Measurement conditions

IG switch "ON" After engine started

Front Oxygen sensor heater Battery voltage

Below 1.0 V/

Immediately after

Rear Oxygen sensor heater. Battery voltage

Below 1.0 V/After more

than 3 minutes

B8–94

7-12-7 DTC NO.P0136/22 REAR OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 1 SENSOR 2) (1) System diagram

Rear oxygen sensor connection vehicle harness side connector

EFI ECU connection vehicle harness side connector

(2) Circuit description

1.Refer to DTC P0130/21 (Oxygen sensor circuit malfunction (Bank 1 sensor 1)).

(3) Trouble area

1.Open wire or short circuit in the rear oxygen sensor circuit

2.Rear oxygen sensor

3.EFI ECU

28 29 30 31 32 33 34 35 36 37

70 71 72 73 74 75 76 77

107 108 109 110 111112

234567 21

60 61 62 63 64 65 66 67 68 69

97 98 99

100 101 102 105 106

129 130 133 134 135

22 23 24 25 26 27

103 104

131 132

38 39 40 41 42 43 44 45 46

78 79 80 81 82 83 86 87

113 114 118119

8 9 10 11 12 13

84 85

115 116 117

120

49 50 51 52 53 54 55 56 57

89 90 91 92

121 122

14 15 16 17 18 19

93 94

123 124 125 126

127

128

H11E6051S10

T11E6530S10

OXH2

OX2

T11E6513ES20

EFI ECU

To Main relay

Rear oxygen sensor

OX2

OXH2

125 19

2 4

B8–95

(4) Checking points

NOTE

• When this code is outputted concurrently with another code, carry out the check for that code first.

1.Is the signal from the rear oxygen sensor inputted to the EFI ECU?

2.Is the harness between the rear oxygen sensor and the EFI ECU normal?

3.Is the output of the rear oxygen sensor normal?

Confirmation driving pattern

(1) Step 1; Using DS-21, with the IG switch turned "LOCK", connect the DS-21 diagnosis tester to DLC

through the SST. Turn "ON" the IG switch and the main switch of the tester. Set the tester to the "Continuous monitoring results" of the CARB mode.

SST: 09991-87404-000

(2) Step 1; Using DS-@, with the IG switch turned "LOCK", connect the DS-@ diagnosis tester to DLC.

Turn "ON" the IG switch and the main switch of the tester. Set the tester to the "Continuous monitoring results" of the CARB mode.

(3) Step 2; Start the engine. With all switch turned "OFF", keep on warming the engine for more than

five minutes until the engine coolant temperature reaches 90Ç or above.

(4) Step 3; Accelerate the vehicle until the vehicle speed reaches 50 km/h or more in the 1st ! 2nd

gear. Keep on running the vehicle at that speed for at least 40 seconds.

(5) Step 4; Under this condition, release the foot off from the accelerator pedal so as to decelerate

the vehicle. Maintain the idling state.

(6) Step 5; After one minute of idling, press the F1 key of the tester. Check to see if the DTC P0130/21

is outputted.

NOTE

• If the conditions in this test are not strictly followed, detection of the malfunction will not be possible.

• If you do not have diagnosis tester (DS-21/DS-@), turn the ignition switch "LOCK" after performing steps 2 to 4, then perform steps 2 to 4 again.

(5) Inspection procedure 1 When using diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool:

NOTE

• Read the freeze frame data, using the diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool. Because the freeze frame data records the engine conditions when the malfunction was detected, when troubleshooting the freeze frame data is useful to determine whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel ratio lean or rich, etc. at the time of the malfunction.

C13E5563ES10

Vehicle speed

50 km/h

Idling

IG SW OFF

Warmed up

40 sec. or more

B8–96

èè

1. Check of DTC.

1.Are other codes (Those other than DTC P0136/22) outputted?

çIf the output is made, pr

oceed to the Item of the relevant diagnosis code.

çIf no output is made, proceed to è2.

èè

2. Wiring harness check

1.The IG switch turned "LOCK".

2.Set the SST (Sub-harness). However, the SST connectors at the ECU side should remain disconnected.

SST: 09842-97209-000

3.Disconnect the oxygen sensor connector.

4.Check the harness and connector for open wire or short. (1) Between the oxygen sensor connection vehicle harness side connector1 (OX2) and SST 18 (OX2)

SPECIFIED VALUE: Continuity exists.

(2) Between the oxygen sensor connection vehicle harness side connector1 (OX2) and the body earth

SPECIFIED VALUE: No continuity exists

5.Are the check results for open wire and short OK?

çIf it is OK, go to

è3.

çIf it is NG, repair or replace the harness or connector.

èè

3. Check of output voltage of sensor.

1.Connect the rear oxygen sensor and SST connectors, respectively.

2.Connect the diagnosis tester to DLC. (1) In case of DS-21, connect the DS-21 diagnosis tester

to DLC through the SST.

SST: 09991-87404-000

(2) In case of DS-@, connect the DS-@ diagnosis tester

directly to DLC.

(3) In case of the OBD @ generic scan tool, connect the

OBD @ generic scan tool directly to DLC.

B8–97

T11E6537T10

SST

T11E6573T10

3.Warm up the engine.

4.Turn "ON" the main switch of the tester.

5.Race the engine at 4000 rpm for three minutes by depressing the accelerator pedal.

6.Under the condition of step 5, release the foot off from the accelerator pedal so as to allow the engine to idle.

7.Read the output voltage of the oxygen sensor between Steps 5 to 6.

SPECIFIED VALUE: The voltage should become 0.4 V or below and 0.55 V or more, respectively, at

least one time.

8.Are the check results OK?

çIf it is OK, check the EFI ECU cir

cuit.

çIf it is NG, go to è4.

èè

4. Check of output voltage of sensor.

1.Warm up engine completely.

2.IG switch turned "LOCK".

3.Disconnect the connector of the rear oxygen sensor.

4.Connect a voltmeter to the connector terminal of oxygen sensor.

5.Hold the engine racing speed for 5 minutes at 2000 rpm. At this time, ensure that the reading of the volt meter is within the specified value.

SPECIFIED VALUE: The voltmeter exhibits an output voltage of 0.2 V or more at least one time?

6.Are the check results OK?

çIf it is OK, check or r

eplace the EFI ECU.

çIf it is NG, replace the oxygen sensor. (Bank 1, sensor 2)

2 When not using diagnosis tester (DS-21/DS-@) or OBD @ generic scan tool:

èè

1. Check of wire harness continuity

1.Perform continuity check between each of the following terminals. (1) Between sensor connection vehicle harness side connector 1 (OX2) - ECU connection vehicle har-

ness side connector 18 (OX2)

(2) Between sensor connection vehicle harness side connector 2 (E2) - ECU connection vehicle har-

ness side connector 19 (E2)

çIf it is OK, pr

oceed to è2.

çIf it is NG, repair the harness and connectors.

èè

2. Rear oxygen sensor continuity check

1.Perform continuity check between each of the following terminals. (1) Between rear oxygen sensor side connector 1 (OX2) - rear oxygen sensor body (2) Between rear oxygen sensor side connector 2 (E2) - rear oxygen sensor body

SPECIFIED VALUE: No continuity exists.

çIf it is OK, pr

oceed to è3.

çIf it is NG, replace the rear oxygen sensor.

Refer to Page B4-3.

B8–98

èè

3. Rear oxygen sensor signal check

1.Stop the vehicle.

2.Continue racing of 2000rpm or above for about five minutes from the state in which the rear oxygen sensor is cooled.

3.Perform output voltage measurements of the rear oxygen sensor during this time (Between the rear oxygen sensor side terminals).

SPECIFIED VALUE: It becomes 0 V(During cold period) ! 0.65 V or above (When detecting rich

state after warm-up).

4.Stop the engine and perform the output voltage measurements between the following terminals. (1) Between rear oxygen sensor side connector 1 (OX2) - rear oxygen sensor side connector 2 (E2)

SPECIFIED VALUE: 0.55V or less.

NOTE

• Measure them under the condition in which the rear oxygen sensor is detecting oxygen (Lean condition).

çIf it is OK, pr

oceed to è4.

çIf it is NG, replace the rear oxygen sensor.

Refer to Page B4-3.

èè

4. Rear oxygen sensor unit check

1.Perform unit check of the rear oxygen sensor.

Refer to Page B8-222.

çIf it is OK, check the oxygen sensor system. çIf it is NG, r

eplace the rear oxygen sensor.

Refer to Page B4-3.

B8–99

Daihatsu SIRION M300 Service Manual (No.9890) – ENGINE CONTROL SYSTEM

Specifications and Main Features

Frequently Asked Questions

User Manual