Toyota Camry 2007-2009 Service Manual - 2GR-FE_Engine_Control_System

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–1

SFI SYSTEM

PRECAUTION

NOTICE:

•Perform the RESET MEMORY (AT) initialization operation after replacing the automatic transmission assembly, engine assembly or ECM (See page AX-25).

•Perform REGISTRATION (VIN registration) when replacing the ECM (See page ES-20).

ES

			ES–2	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
					DEFINITION OF TERMS
			Terms		Definition
			Monitor Description		Description of what ECM monitors and how to detect malfunctions (monitoring purpose and
					its details).
			Related DTCs		A group of diagnostic trouble codes that are output by ECM based on the same
					malfunction detection logic.
			Typical Enabling Condition		Preconditions that allow ECM to detect malfunctions.
					With all preconditions satisfied, ECM sets DTC when monitored value(s) exceeds
					malfunction threshold(s).
			Sequence of Operation		Order of monitor priority, applied if multiple sensors and components are involved in single
					malfunction detection process.
					Each sensor and component monitored in turn and not monitored until previous detection
					operation is completed.
			Required Sensor/Components		Sensors and components used by ECM to detect each malfunction.
			Frequency of Operation		Number of times ECM checks for each malfunction during each driving cycle.
	ES
					"Once per driving cycle" means that ECM checks for malfunctions only once in single
					driving cycle.
					"Continuous" means that ECM checks for malfunctions whenever enabling conditions are
					met.
			Duration		Minimum time for which ECM must detect continuous deviation in monitored value(s) in
					order to set DTC. Timing begins when Typical Enabling Conditions are met.
			Malfunction Thresholds		Value, beyond which, ECM determines malfunctions exist and sets DTCs.
			MIL Operation		Timing of MIL illumination after a malfunction is detected.
					"Immediate" means that ECM illuminates MIL as soon as a malfunction is detected.
					"2 driving cycle" means that ECM illuminates MIL if the same malfunction is detected twice
					during next sequential driving cycle.

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–3

PARTS LOCATION

ECM
	MASS AIR FLOW METER
	ENGINE ROOM R/B
	- EFI RELAY	ES
	- A/F RELAY
	- C/OPN RELAY
	- ST RELAY
PURGE VSV	- ST CUT RELAY
	- IG2 RELAY
	CANISTER
	FUEL PUMP
HEATED OXYGEN SENSOR
(BANK 1 SENSOR 2)
ACTIVE MOUNT CONTROL VSV
HEATED OXYGEN SENSOR
(BANK 2 SENSOR 2)
	A134870E01

ES–4	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES	COMBINATION METER
DLC3
INSTRUMENT PANEL J/B
- IGN FUSE
- STOP FUSE	ACCELERATOR PEDAL
	STOP LIGHT SWITCH
	A139510E01

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–5
VVT SENSOR (BANK 1 INTAKE SIDE)
VVT SENSOR FOR INTAKE CAMSHAFT
(BANK 2)
CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
(BANK 1 INTAKE SIDE)
CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
(BANK 2 INTAKE SIDE)

ENGINE COOLANT

IGNITION COIL WITH IGNITER	TEMPERATURE SENSOR
FUEL INJECTOR

ES

AIR FUEL RATIO SENSOR (BANK 2 SENSOR 1)

VVT SENSOR FOR EXHAUST CAMSHAFT (BANK 2)

CRANKSHAFT POSITION SENSOR

VVT SENSOR FOR EXHAUST CAMSHAFT (BANK 1)

AIR FUEL RATIO SENSOR (BANK 1 SENSOR 1)

CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

(BANK 2 EXHAUST SIDE)

A114586E05

ES–6	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

THROTTLE BODY

(THROTTLE POSITION

SENSOR)

ES

ACIS ACTUATOR

KNOCK SENSOR (BANK 1)

KNOCK SENSOR (BANK 2)

A114543E04

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–7

SYSTEM DIAGRAM

1.Without Smart Key System:

		IG2			GAUGE No. 2
	IG2
ST/AM2					IGN
	IG SW
AM2			ECM
	IG2				ES
	ST2		NSW	IGSW
	IG1	PNP SW
					Combination Meter
AM1	ST1
			STA
				W
AM1				SPD	MIL
	ST				VVT OCV (Intake Side RH)
				OC1+
		C/OPN		OC1-
ALT	Fuel Pump				VVT OCV (Intake Side LH)
			FC
				OC2+
				OC2-
		ETCS			VVT OCV (Exhaust Side RH)
			+BM	OE1+
		EFI No. 1
			BATT	OE1-
		EFI			VVT OCV (Exhaust Side LH)
	EFI MAIN
FL MAIN				OE2+
			MREL	OE2-
				E02
Battery				E05
	Starter		A	E1
					A137635E02

ES–8	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

A	ECM			APP Sensor
EFI No. 3
EFI No. 2		VCP2
		VPA2
	+B
	+B2	EPA2
		VCPA
	AICV		VPA
VSV for ACIS			EPA
ES	PRG			Transmission
VSV for EVAP System		CAN+
				Control ECU
	ACIS	CAN-
VSV for ACIS
			IMO	Transponder Key
	ACM			ECU
VSV for Active Control Mount System			IMI
	THA			Stop Light SW
MAF Meter	E2G
	VG		STP	STOP
	ETHA
		ST1-		IGN
HO2 Sensor	HT1B
(Bank 1 Sensor 2)	EX1B			Power Steering Oil Pressure SW
	OX1B
		PSW
HO2 Sensor	HT2B		E04
(Bank 2 Sensor 2)	EX2B		E01
	OX2B		E03
		ME01
B
				A137631E02

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–9

B	Canister Pump Module	ECM
		VPMP	KNK1
		EPPM	EKNK
		PPMP		Knock Sensor (Bank 1)
		VCPP	KNK2
		MPMP	EKN2	ES
				Knock Sensor (Bank 2)
	VVT Sensor	VV1+	#10
	(Bank 1 Intake Side)	VV1-
		VCV1		No. 1 Fuel Injector
			#20
	VVT Sensor	VV2+		No. 2 Fuel Injector
	(Bank 2 Intake Side)	VV2-
		VCV2	#30
				No. 3 Fuel Injector
	VVT Sensor	EV1+	#40
	(Bank 1 Exhaust Side)	EV1-
		VCE1		No. 4 Fuel Injector
			#50
	VVT Sensor	EV2+		No. 5 Fuel Injector
	(Bank 2 Exhaust Side)	EV2-
		VCE2	#60
				No. 6 Fuel Injector
	To Main Body ECU	CANH		To IG2 Relay
		CANL
				A137632E02

ES–10	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

					Crankshaft Position Sensor
			ECM
			VTA1	NE+
		Throttle Body	VCTA	NE-
		Assembly	VTA2
			ETA
			M+
			M-	TC	DLC3
ES			GE01
		ECT Sensor			Ignition Coil (No. 1)
			THW	IGT1
				IGF1
			ETHW		Ignition Coil (No. 2)
				IGT2
		A/F Sensor	HA1A		Ignition Coil (No. 3)
		(Bank 1 Sensor 1)
			A1A+	IGT3
			A1A-		Ignition Coil (No. 4)
				IGT4
		A/F Sensor	HA2A		Ignition Coil (No. 5)
		(Bank 2 Sensor 1)
			A2A+	IGT5
			A2A-		Ignition Coil (No. 6)
	A/F	A/F		IGT6
		To Battery
					To IG2 Relay
		To EFI Relay			Noise Filter (RH Side)
					Noise Filter (LH Side)
					A137633E02

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–11

GAUGE No. 1	ECM	Transmission Control SW To IG1 Relay
To IG1 Relay		S
Park / Neutral Position SW		ECU IG No. 2
		SFTD
	P	SFTU
	R	Spiral Cable
		Cruise Control SW
	N
	D	ES
Transmission Control
ECU
		CCS
		A137634E02

ES–12	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

2.With Smart Key System:

Main Body ECU				GAUGE No. 2
ACC		ECM
	To ECU-ACC Fuse
STSW		STSW
ACCR		ACCR		Combinatiion Meter
	IG2	To IG2 Fuse
IG2D			W
ES		ST CUT	SPD	MIL
	IGN
STR		STAR		VVT OCV (Intake Side RH)
STR2			OC1+
		ETCS	OC1-
		+BM		VVT OCV (Intake Side LH)
ST	ST/AM2	PNP SW
		NSW	OC2+
			OC2-
		STA
		IGSW		VVT OCV (Exhaust Side RH)
	To IGN Fuse	C/OPN	OE1+
	Fuel Pump	FC	OE1-
				VVT OCV (Exhaust Side LH)
		EFI No. 1	OE2+
		BATT
		EFI	OE2-
FL MAIN	EFI MAIN
		MREL	E02
			E05
Battery			E1
	Starter	A
				A137630E02

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–13

A	ECM			APP Sensor
EFI No. 3
EFI No. 2		VCP2
		VPA2
	+B
	+B2	EPA2
		VCPA
	AICV		VPA
VSV for ACIS			EPA
	PRG			ES
VSV for EVAP System		CAN+		Transmission
				Control ECU
	ACIS	CAN-
VSV for ACIS
			IMO	Transponder Key
	ACM			ECU
VSV for Active Control Mount System			IMI
	THA			Stop Light SW
MAF Meter	E2G
	VG		STP	STOP
	ETHA
		ST1-		IGN
HO2 Sensor	HT1B
(Bank 1 Sensor 2)	EX1B			Power Steering Oil Pressure SW
	OX1B
		PSW
HO2 Sensor	HT2B		E04
(Bank 2 Sensor 2)	EX2B		E01
	OX2B		E03
		ME01
B
				A137631E02

ES–14	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

B	Canister Pump Module	ECM
		VPMP	KNK1
		EPPM	EKNK
		PPMP	Knock Sensor (Bank 1)
		VCPP	KNK2
ES		MPMP	EKN2
			Knock Sensor (Bank 2)
	VVT Sensor	VV1+	#10
	(Bank 1 Intake Side)	VV1-
		VCV1	No. 1 Fuel Injector
			#20
	VVT Sensor	VV2+	No. 2 Fuel Injector
	(Bank 2 Intake Side)	VV2-
		VCV2	#30
			No. 3 Fuel Injector
	VVT Sensor	EV1+	#40
	(Bank 1 Exhaust Side)	EV1-
		VCE1	No. 4 Fuel Injector
			#50
	VVT Sensor	EV2+	No. 5 Fuel Injector
	(Bank 2 Exhaust Side)	EV2-
		VCE2	#60
			No. 6 Fuel Injector
	To Main Body ECU	CANH	To IG2 Relay
		CANL
			A137632E02

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–15

				Crankshaft Position Sensor
		ECM
		VTA1	NE+
	Throttle Body	VCTA	NE-
	Assembly	VTA2
		ETA
		M+
		M-	TC	DLC3
		GE01
	ECT Sensor			Ignition Coil (No. 1)	ES
		THW	IGT1
			IGF1
		ETHW		Ignition Coil (No. 2)
			IGT2
	A/F Sensor	HA1A		Ignition Coil (No. 3)
	(Bank 1 Sensor 1)
		A1A+	IGT3
		A1A-		Ignition Coil (No. 4)
			IGT4
	A/F Sensor	HA2A		Ignition Coil (No. 5)
	(Bank 2 Sensor 1)
		A2A+	IGT5
		A2A-		Ignition Coil (No. 6)
A/F	A/F		IGT6
	To Battery
				To IG2 Relay
	To EFI Relay			Noise Filter (RH Side)
				Noise Filter (LH Side)
					A137633E02

ES–16	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

GAUGE No. 1	ECM	Transmission Control SW To IG1 Relay
To IG1 Relay		S
Park / Neutral Position SW		ECU IG No. 2
		SFTD
	P	SFTU
	R	Spiral Cable
		Cruise Control SW
	N
	D
ES
Transmission Control
ECU
		CCS
		A137634E02

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–17

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:

*: Use the intelligent tester.

1VEHICLE BROUGHT TO WORKSHOP

NEXT

2CUSTOMER PROBLEM ANALYSIS

NEXT

3CONNECT INTELLIGENT TESTER TO DLC3*

ES

HINT:

If the display indicates a communication fault in the tester, inspect the DLC3.

NEXT

4 CHECK DTC AND FREEZE FRAME DATA*

HINT:

Record or print DTCs and freeze frame data, if necessary.

NEXT

5CLEAR DTC AND FREEZE FRAME DATA*

NEXT

6CONDUCT VISUAL INSPECTION

NEXT

7SET CHECK MODE DIAGNOSIS*

NEXT

8CONFIRM PROBLEM SYMPTOMS

HINT:

If the engine does not start, perform steps 10 and 12 first.

		ES–18		2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
					Result
								Result		Proceed to
					Malfunction does not occur					A
							Malfunction occurs			B
					B
								GO TO STEP 10
		A
		9	SIMULATE SYMPTOMS
		NEXT
ES
		10	CHECK FOR DTCS*
					Result
								Result		Proceed to
							Trouble code			A
								No code		B
					B
								GO TO STEP 12
		A
		11	REFER TO DTC CHART
		NEXT
		GO TO STEP 14
		12	CONDUCT BASIC INSPECTION
					Result
								Result		Proceed to
					Malfunctioning parts not confirmed					A
					Malfunctioning parts confirmed					B
					B
								GO TO STEP 17
		A
		13	REFER TO PROBLEM SYMPTOMS TABLE
					Result
								Result		Proceed to
					Malfunctioning circuit confirmed					A

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM					ES–19
			Result		Proceed to
	Malfunctioning parts confirmed				B
	B
			GO TO STEP 17

A

14CHECK ECM POWER SOURCE CIRCUIT

NEXT

15CONDUCT CIRCUIT INSPECTION

Result

ES

Result	Proceed to
Malfunction not confirmed	A
Malfunction confirmed	B

B GO TO STEP 18

A

16 CHECK FOR INTERMITTENT PROBLEMS

NEXT

GO TO STEP 18

17CONDUCT PARTS INSPECTION

NEXT

18IDENTIFY PROBLEM

NEXT

19 ADJUST AND/OR REPAIR

NEXT

ES–20	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

20 CONDUCT CONFIRMATION TEST

NEXT

END

ES

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–21

CHECK FOR INTERMITTENT PROBLEMS

HINT:

Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with an intelligent tester when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.

1.Clear the DTCs.

2.Switch the ECM from normal mode to check mode using an intelligent tester (See page ES-49).

3.Perform a simulation test (See page IN-40).

4.Check and wiggle the harness(es), connector(s) and

terminal(s) (See page IN-45).	ES

ES–22	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

					BASIC INSPECTION
					When the malfunction is not confirmed by the DTC check,
					troubleshooting should be carried out in all circuits
					considered to be possible causes of the problem. In many
					cases, by carrying out the basic engine check shown in the
					following flowchart, the location of the problem can be found
					quickly and efficiently. Therefore, using this check is essential
					when troubleshooting the engine.
		1	CHECK BATTERY VOLTAGE
					NOTICE:
					Carry out this check with the engine stopped and the
					engine switch off.
ES
					Result
								Result		Proceed to
							11 V or more			OK
							Below 11 V			NG
					NG
								CHARGE OR REPLACE BATTERY
		OK
		2	CHECK WHETHER ENGINE CRANKS
					NG
								PROCEED TO PROBLEM SYMPTOMS
								TABLE
		OK
		3	CHECK WHETHER ENGINE STARTS
					NG
								GO TO STEP 6
		OK

4 CHECK AIR FILTER

(a)Visually check that the air filter is not excessively contaminated with dirt or oil.

NG		REPLACE AIR FILTER

OK

5 CHECK IDLING SPEED

NG		TROUBLESHOOT IDLING SPEED AND
		PROCEED TO NEXT STEP

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–23

OK

6 CHECK FUEL PRESSURE

NG		TROUBLESHOOT FUEL PRESSURE AND
		PROCEED TO NEXT STEP

OK

7 CHECK FOR SPARKS

	NG		TROUBLESHOOT SPARK AND PROCEED
					ES
			TO NEXT STEP

OK

PROCEED TO PROBLEM SYMPTOMS TABLE

ES–24

ES

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

REGISTRATION

NOTICE:

The Vehicle Identification Number (VIN) must be input into the replacement ECM.

HINT:

The VIN is in the form of a 17-digit alphanumeric vehicle identification number. An intelligent tester is required to register the VIN.

1.INPUT INSTRUCTIONS

(a)The general VIN input instructions using an intelligent tester are explained below:

(b)The arrow buttons (UP, DOWN, RIGHT and LEFT) and numerical buttons (0 to 9) are used, in order to input the VIN.

(c)Cursor Operation

To move the cursor around the tester screen, press the RIGHT and LEFT buttons.

(d)Alphabetical Character Input

(1)Press the UP and DOWN buttons to select the desired alphabetical character.

(e)Numeric Character Input

(1)Press the numerical button corresponding to the number that you want to input.

HINT:

Numerical characters can be selected by using the UP and DOWN buttons.

(f)Correction

(1)When correcting the input character(s), put the cursor onto the character using the RIGHT or LEFT button.

(2)Select or input the correct character using the UP and DOWN buttons, or the numerical buttons.

(g)Finishing Input Operation

(1)Make sure that the input VIN matches the vehicle VIN after input.

(2)Press the ENTER button on the tester.

2.READ VIN (Vehicle Identification Number)

(a)The flowchart of the VIN reading process is shown. This process allows the VIN stored in the ECM to be read, in order to confirm that the two VINs, provided with the vehicle and stored in the vehicle's ECM, are the same.

(b)Read VIN using an intelligent tester.

(c)Check the vehicle's VIN.

(d)Connect the intelligent tester to the DLC3.

(e)Turn the ignition switch on (IG).

(f)Turn the tester on.

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–25

(g)Enter the following menus: DIAGNOSIS / ENHANCED OBD ll / VIN.

	Menu Screen:
	Select VIN READ
		ES
DTC P0630 Set	VIN Previously Stored	VIN Not Stored
	17-digit VIN
	displayed
[EXIT]	[EXIT]	[EXIT]
	To Menu Screen
		A103812E03

3.WRITE VIN

(a)The flowchart of the VIN writing process is shown. This process allows the VIN to be input into the ECM. If the ECM is changed, or the VINs do not match, the VIN can be registered, or overwritten in the ECM by following this procedure.

(b)Write VIN using the intelligent tester.

(c)Check the vehicle's VIN.

(d)Connect the intelligent tester to the DLC3.

(e)Turn the ignition switch on (IG).

(f)Turn the tester on.

ES–26	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
	(g) Enter the following menus: DIAGNOSIS /
	ENHANCED OBD ll / VIN.

Menu Screen:

Select VIN WRITE

ES

VIN Previously Stored

[NO]

[YES]

[YES]

To Menu

[YES]

17-digit VIN displayed

[NO]

Screen

Continue to next illustration

To Menu Screen

A103813E01

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–27

New Registration
[ENTER]	Input Instructions
	ES
	[ENTER]
[ENTER]	[ENTER]
	Input Error
	[EXIT]
Continue to next illustration
	A103814E03

ES–28	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

Writing Successful	Writing Error	Communication Error
ES
[ENTER]	[EXIT]	[EXIT]
To Menu Screen	To Menu Screen	To Menu Screen
		A103815E03

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM	ES–29

CHECKING MONITOR STATUS

The purpose of the monitor result (mode 06) is to allow access to the results for on-board diagnostic monitoring tests of specific components/systems that are not continuously monitored. Examples are catalyst, evaporative emission (EVAP) and thermostat.

The monitor result allows the OBD II scan tool to display the monitor status, test value, minimum test limit and maximum test limit. These data are displayed after the vehicle has been driven to run the monitor.

When the test value is not between the minimum test limit and maximum test limit, the ECM (PCM) interprets this as a malfunction. When the component is not malfunctioning, if the difference of the test value and test limit is very small, the

component will malfunction in the near future. ES Perform the following instructions to view the monitor status. Although the Toyota diagnostic tester is used in the following instructions, it can be checked using a generic OBD II scan

tool. Refer to your scan tool operator's manual for specific procedures.

1.PERFORM MONITOR DRIVE PATTERN

The monitor results and test values can be checked with the OBD II scan tool or the intelligent tester. The engine control module (ECM) monitors the emissions-related components such as the thermostat, catalyst converter and evaporative emissions (EVAP), and determines whether they are functioning normally or not. When monitoring is finished, the ECM stores the monitor results and the test values. The monitor result indicates whether the component is functioning normally or not. The test value is the value that was used to determine the monitor result. If the test value is outside of the test limit (malfunction criterion), the ECM determines the component is malfunctioning. Some emissions-related components have multiple test values to determine monitor result. If one of these test values is outside of the test limit, the ECM determines the component is malfunctioning.

(a)Connect the intelligent tester to the DLC3.

(b)Start the engine and turn the tester on.

(c)Clear the DTCs.

(d)Run the vehicle in accordance with the applicable drive pattern described in READINESS MONITOR DRIVE PATTERN (See page ES-28). DO NOT turn the engine switch off.

NOTICE:

The test results will be lost if the engine switch is turned off.

		ES–30	2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
			2.	ACCESS MONITOR RESULT
				(a) Select the following menus on the intelligent tester:
				DIAGNOSIS, ENHANCED OBDII, MONITOR INFO
				and MONITOR RESULT. The monitor status
				appears after the component name.
				• INCMP: The component has not been monitored
				yet.
				• PASS: The component is functioning normally.
				• FAIL: The component is malfunctioning.
				(b) Confirm that the component is either PASS or FAIL.
				(c) Select the component and press ENTER. The
				accuracy test value appears if the monitor status is
				either PASS or FAIL.
				HINT:
				The monitor result might be PASS on rare
ES
				occasions even if the Malfunction Indicator Lamp
				(MIL) is illuminated. This indicates that the system
				was malfunctioning in the previous driving cycle.
				This might be caused by an intermittent problem.

3. CHECK COMPONENT STATUS

(a) Compare the test value with the minimum test limit (MIN LIMIT) and maximum test limit (MAX LIMIT).

(b) If the test value is between the minimum test limit and maximum test limit, the component is functioning normally. If not, the component is malfunctioning. The test value is usually significantly higher or lower than the test limit. If the test value is on the borderline of the test limit, the component will malfunction in the near future.

HINT:

The monitor result might be PASS on rare occasions even if the Malfunction Indicator Lamp (MIL) is illuminated. This indicates that the system was malfunctioning in the previous driving cycle. This might be caused by an intermittent problem.

4.MONITOR RESULT INFORMATION

If you use a generic scan tool, multiply the test value by the scaling value listed below.

A/F Sensor Bank 1:

Monitor ID	Test ID	Scaling	Unit	Description
$01	$8E	Multiply by 0.0003	No dimension	A/F sensor deterioration level
$01	$91	Multiply by 0.004	mA	A/F sensor current

HO2S Bank 1 Sensor 2:

Monitor ID	Test ID	Scaling	Unit	Description
$02	$07	Multiply by 0.001	V	Minimum sensor voltage
$02	$08	Multiply by 0.001	V	Maximum sensor voltage
$02	$8F	Multiply by 0.003	g	Maximum oxygen storage capacity

A/F Sensor Bank 2:

Monitor ID	Test ID	Scaling	Unit	Description
$05	$8E	Multiply by 0.0003	No dimension	A/F sensor deterioration level
$05	$91	Multiply by 0.004	mA	A/F sensor current