Hino 238, 258LP, 268, 338, 358 Workshop Manual

Page 1

FOREWORD

This workshop manual has been prepared to provide information regarding repair procedures on Hino Trucks.

Applicable for HINO 238, 258LP, 268, 338 series, equipped with J08E-VB and J08E-VC engine

When making any repairs on your vehicle, be careful not to be injured through improper procedures. As for maintenance items, refer to the Driver’s / Owner All information and specifications in this manual are based upon the latest product information available at the time of printing. Hino Motors Sales U.S.A., Inc. reserves the right to make changes at any time without prior notice.

Please note that the publications below have also been prepared as relevant workshop manuals for the components and systems in these vehicles.

Manual Name Pub. No.

Chassis Workshop Manual

J08E-VB, VC Engine Workshop Manual S5-UJ08E10A

Trouble Shooting Workshop Manual

's Manual.

S1-UNAE10A 1/2 S1-UNAE10A 2/2

S7-UNAE10C 1/4 S7-UNAE10C 3/4 S7-UNAE10C 4/4

Page 2

CHAPTER REFERENCES REGARDING THIS WORKSHOP MANUAL

Use this chart to the appropriate chapter numbers for servicing your particular vehicle.

MANUAL NO. S7-UNAE10C 2/4 (U.S.A.), S7-CNAE10C 2/4 (CANADA)

CHAPTER

GENERAL INTRODUCTION 1-001

TROUBLE SHOOTING - COMPONENTS 2-001

TROUBLE SHOOTING ELECTRICAL CONTROL SYSTEM

ENGINE CONTROL SYSTEM (J08E) 4-001

DEF SCR SYSTEM (DCU) 5-001

BURNER CONTROL SYSTEM (BCU) 6-001

BRAKE CONTROL SYSTEM

VEHICLE CONTROL SYSTEM (VCS) 11-001

CAN COMMUNICATION 12-001

DX MANUAL DX01-001 DX02-001 DX03-001 DX04-001 DX06-001 DX07-001

This manual does not contain items on half-tone dot meshing.

MODELS HINO 238, 258LP, 268, 338, 358

Production Code NE8J, NF8J, NJ8J, NV8J

3-001

9-001

(ABS:HYDRAULIC (E VERSION))

(ABS:FULL AIR)

9-002

Page 3

INDEX: TROUBLE SHOOTING

GENERAL INTRODUCTION

TROUBLE SHOOTING - COMPONENTS

TROUBLE SHOOTING ELECTRICAL CONTROL SYSTEM

WORKSHOP MANUAL

ENGINE CONTROL SYSTEM (J08E)

DEF SCR SYSTEM (DCU)

BURNER CONTROL SYSTEM (BCU)

BRAKE CONTROL SYSTEM

VEHICLE CONTROL SYSTEM (VCS)

CAN COMMUNICATION

Page 4

ENGINE CONTROL SYSTEM (J08E) 4–1

ENGINE CONTROL SYSTEM (J08E)

ENGINE CONTROL SYSTEM......................................4-3

PRECAUTIONS FOR DIAGNOSIS.........................4-3

SYSTEM BLOCK DIAGRAM...................................4-5

SYSTEM DIAGRAM................................................4-6

PRECAUTIONS ......................................................4-8

SENSOR LOCATION ............................................4-11

COMPUTER (ECU) PIN ASSIGNMENT............... 4-20

ENGINE ECU CONNECTOR................................4-24

INSPECTION ........................................................ 4-28

DIAGNOSIS USING THE PC DIAGNOSIS

TOOL.....................................................................4-29

DIAGNOSTIC TROUBLE CODE (DTC)

TABLE ...................................................................4-30

GROUP SHARING THE SENSOR POWER SUPPLY

TERMINAL ............................................................4-45

GROUP SHARING THE SENSOR GND

TERMINAL ............................................................4-46

ENGINE BASIC INSPECTION SHEET

(ENGINE INSPECTION CHECK SHEET) ............4-47

NO DTC ................................................................4-50

DTC: P0016 ..........................................................4-53

DTC: P003A ..........................................................4-57

DTC: P0045 ..........................................................4-64

DTC: P0047 ..........................................................4-71

DTC: P0048 ..........................................................4-78

DTC: P006E ..........................................................4-85

DTC: P006F ..........................................................4-90

DTC: P007B ..........................................................4-95

DTC: P007C and P007D.....................................4-113

DTC: P0088 ........................................................4-122

DTC: P0096 ........................................................4-146

DTC: P0097 and P0098 ......................................4-161

DTC: P00AF........................................................4-170

DTC: P0101 ........................................................4-175

DTC: P0104 ........................................................4-187

DTC: P0106 ........................................................4-195

DTC: P0108 ........................................................4-202

DTC: P0112 and P0113 ......................................4-210

DTC: P0115 ........................................................4-219

DTC: P0117 and P0118 ......................................4-231

DTC: P011A ........................................................4-241

DTC: P011C........................................................4-252

DTC: P0122 and P0123 ......................................4-260

DTC: P0128 ........................................................4-273

DTC: P016E and P016F .....................................4-280

DTC: P0182 and P0183 ......................................4-304

4-001

DTC: P0191 ........................................................4-313

DTC: P0192 and P0193 ......................................4-335

DTC: P01A5 ........................................................4-346

DTC: P01A6 ........................................................4-355

DTC: P0200 ........................................................4-364

DTC: P0201, P0202, P0203, P0204, P0205 and

P0206..................................................................4-367

DTC: P0217 ........................................................4-376

DTC: P0219 ........................................................4-383

DTC: P0222 and P0223 ......................................4-390

DTC: P0234 ........................................................4-402

DTC: P0237 ........................................................4-409

DTC: P0263, P0266, P0269, P0272, P0275 and

P0278..................................................................4-418

DTC: P026C and P026D.....................................4-434

DTC: P0299 ........................................................4-452

DTC: P0300 ........................................................4-459

DTC: P0301, P0302, P0303, P0304, P0305 and

P0306..................................................................4-469

DTC: P0335 ........................................................4-481

DTC: P0336 ........................................................4-489

DTC: P0340 ........................................................4-497

DTC: P0341 ........................................................4-504

DTC: P0381 ........................................................4-512

DTC: P0401 ........................................................4-519

DTC: P0402 ........................................................4-537

DTC: P0404 ........................................................4-550

DTC: P0405 and P0406 ......................................4-557

DTC: P041B ........................................................4-564

DTC: P041C and P041D.....................................4-579

DTC: P0420 ........................................................4-589

DTC: P0489 and P0490 ......................................4-596

DTC: P049D........................................................4-603

DTC: P04D5 and P04D6.....................................4-610

DTC: P0500 and P0501 ......................................4-619

DTC: P0504 ........................................................4-627

DTC: P0519 ........................................................4-635

DTC: P0524 ........................................................4-639

DTC: P0562 and P0563 ......................................4-646

DTC: P05F1 ........................................................4-654

DTC: P0605 ........................................................4-664

DTC: P0606 ........................................................4-667

DTC: P0607 ........................................................4-670

DTC: P0610 ........................................................4-673

DTC: P0611 ........................................................4-677

DTC: P0617 ........................................................4-680

Page 5

ENGINE CONTROL SYSTEM (J08E)4–2

DTC: P0628 and P0629 ......................................4-685

DTC: P062F ........................................................4-694

DTC: P0630.........................................................4-699

DTC: P0642.........................................................4-703

DTC: P0643.........................................................4-710

DTC: P064C ........................................................4-718

DTC: P0652.........................................................4-725

DTC: P0653.........................................................4-731

DTC: P0671, P0672, P0675 and P0676 .............4-738

DTC: P0683.........................................................4-750

DTC: P0686.........................................................4-757

DTC: P06D3 and P06D4 .....................................4-762

DTC: P0704.........................................................4-770

DTC: P073D ........................................................4-776

DTC: P081A ........................................................4-783

DTC: P081B ........................................................4-788

DTC: P0850.........................................................4-793

DTC: P1133.........................................................4-800

DTC: P119F ........................................................4-808

DTC: P141F ........................................................4-815

DTC: P1426.........................................................4-818

DTC: P1427.........................................................4-826

DTC: P1428.........................................................4-834

DTC: P1458.........................................................4-843

DTC: P1459.........................................................4-850

DTC: P14B0 ........................................................4-857

DTC: P14B2 ........................................................4-862

DTC: P14B3 and P14B4 .....................................4-867

DTC: P14B7 and P14B8 .....................................4-874

DTC: P14BC and P14BD ....................................4-881

DTC: P14BF ........................................................4-888

DTC: P1515.........................................................4-895

DTC: P1530.........................................................4-901

DTC: P1601.........................................................4-906

DTC: P200C ........................................................4-911

DTC: P203F ........................................................4-922

DTC: P204F ........................................................4-927

DTC: P207F ........................................................4-931

DTC: P20EE........................................................4-943

DTC: P2100.........................................................4-955

DTC: P2101.........................................................4-962

DTC: P2103.........................................................4-970

DTC: P2120.........................................................4-977

DTC: P2122 and P2123 ......................................4-982

DTC: P2127 and P2128 ......................................4-991

DTC: P2135.......................................................4-1002

DTC: P2138.......................................................4-1009

DTC: P2146.......................................................4-1015

DTC: P2147 and P2148 ....................................4-1023

DTC: P2149.......................................................4-1032

DTC: P2150 and P2151 ....................................4-1040

DTC: P2184 and P2185 ....................................4-1049

DTC: P2214.......................................................4-1058

DTC: P2227.......................................................4-1072

DTC: P2228 and P2229 ....................................4-1077

DTC: P2269.......................................................4-1082

DTC: P226C ......................................................4-1088

DTC: P22D3 ......................................................4-1097

DTC: P240F ......................................................4-1102

DTC: P242B ......................................................4-1115

DTC: P242C and P242D ...................................4-1125

DTC: P244A ......................................................4-1135

DTC: P244B ......................................................4-1161

DTC: P2457.......................................................4-1190

DTC: P2459.......................................................4-1207

DTC: P2463.......................................................4-1210

DTC: P246F ......................................................4-1224

DTC: P2470 and P2471 ....................................4-1234

DTC: P2563.......................................................4-1244

DTC: P2564 and P2565 ....................................4-1251

DTC: P259E ......................................................4-1260

DTC: P259F ......................................................4-1267

DTC: P2635.......................................................4-1274

DTC: P268A and P2696....................................4-1296

DTC: P2BA9......................................................4-1303

DTC: U0073 ......................................................4-1309

DTC: U010A ......................................................4-1313

DTC: U010C......................................................4-1316

DTC: U010E ......................................................4-1319

DTC: U029D......................................................4-1322

DTC: U029E ......................................................4-1325

DTC: U02A2 ......................................................4-1328

DTC: U0301 ......................................................4-1331

DTC: U1001 ......................................................4-1335

DTC: U110A ......................................................4-1338

DTC: U111E ......................................................4-1341

Page 6

ENGINE CONTROL SYSTEM (J08E) 4–783

%L9

(STA)

K01

(S+)

K04

(NC)

NK0

(NO)

(ST)

N6E

(CL2-)

%L7 (STA)

ATM starter relay

Starter cut relay

LL1K01

K0G%D7

K0G

(STCR)

LL1

Engine

ECU

SAPH16F010300632

DTC: P081A

P081A: Starter Disable Circuit Low

INFORMATION

EN01H16F01030F03001098

1. Technical description

• The starter cut relay prevents further rotations of the starter when the starter switch is turned after start of the engine.

• Harness GND short-circuit or disconnection and relay unit failure are detected.

2. DTC set condition

(1) Check conditions

• Engine speed of 500 r/min or more. (Request starter cut relay operation)

• Starter switch ON.

• Battery voltage is in the range of 10 V to 16 V.

The conditions described above remain for 5 seconds or longer.

(2) Judgement criteria

• Output of the starter cut relay remains at 10 V or less for 3 seconds or longer.

3. Reset condition

• Just after restoration to normal condition.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: OFF

• Diag lamp: OFF

5. Symptoms on the vehicle when the DTC is set

• –

• Starter operates even when the engine is running.

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

Page 7

ENGINE CONTROL SYSTEM (J08E)4–784

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is stored after test drive.

8. Estimated failure factors

• Harness disconnection or short-circuit

• Looseness or poor contact of connector

• starter cut relay failure

• Engine ECU failure

Page 8

ENGINE CONTROL SYSTEM (J08E) 4–785

NOYES

Select

Engine

SAPH16F010300633

INSPECTION PROCEDURE: P081A

Check the DTC detected (Engine ECU) [Hino-DX]

Has DTC P081A been detected?

1. Set the starter switch to the "LOCK" position.

2. Disconnect the starter cut relay.

3. Set the starter switch to the "ON" position.

4. Select [Engine] and check if P081A has been detected in [Fault Information].

Go to step 2. Replace the starter cut relay.

Perform "After-inspection work" of INFORMATION section.

Inspect the starter cut relay connector

1. Check the connection of the starter cut relay connector (Looseness and poor contact).

Was any failure found?

Connect securely, repair if needed.

Go to step 3. Perform "After-inspection work" of INFORMATION section.

Page 9

ENGINE CONTROL SYSTEM (J08E)4–786

NOYES

A B

V80

SAPH16F010300634

SAPH16F010300635

Inspect for disconnection in wire harness of starter cut relay

1. Set the starter switch to the "LOCK" position.

2. Connect the signal check harness to the engine ECU.

3. Set the starter switch to the "ON" position.

4. Use the electrical tester to measure the resistance between the terminals of the engine ECU (signal check harness).

Measurement

conditions

Starter switch: ON

Tester connections Standard values

Engine ECU (signal check harness) STCR(V2) – PGD4(V80)

Do the measurements meet the standard value?

Go to step 4. Repair or replace the harness.

Perform "After-inspection work" of INFORMATION section.

Check the DTC detected (Engine ECU) [Hino-DX]

1. Set the starter switch to the "ON" position.

2. Select [Engine] and check if P081A has been detected in [Fault Information].

 

Has DTC P081A been detected?

Replace the engine ECU. Perform "After-inspection work" of INFORMATION section.

Select

Engine

Procedure completed. Perform "After-inspection work" of INFORMATION section.

Page 10

ENGINE CONTROL SYSTEM (J08E) 4–787

CHECKLIST: P081A

DTC: P081A Starter Disable Circuit Low Inspection procedure

Step Action Description Judgement

DTC P081A has been detected: Go to YES.

No DTC has

Check the DTC detected

(Engine ECU) [Hino-DX]

1. Disconnect the starter cut relay.

2. Check if P081A has been detected in [Engine].

been detected: Go to NO.

Failure found: Inspect the starter cut

relay connector

Check the connection of the starter cut relay connector (Looseness and poor contact).

Go to YES.

No failure

found: Go to

NO.

Inspect for disconnection in

wire harness of starter cut relay

Connect the signal check harness to the engine ECU and measure the resistance between the terminals of the engine ECU (signal check harness). <Tester connections> Engine ECU (signal check harness) STCR(V2) – PGD4(V80) <Standard values>  

The measure-

ments meet

the standard

value: Go to

YES.

The measure-

ments do not

meet the stan-

dard value: Go

to NO.

Check

(Yes/No)

Yes No

Go to step 2.

Connect securely, repair if needed. Perform "Afterinspection work" of INFORMATION section.

Go to step 4.

Replace the starter cut relay. Perform "Afterinspection work" of INFORMATION section.

Go to step 3.

Repair or replace the harness. Perform "Afterinspection work" of INFORMATION section.

Check the DTC detected

(Engine ECU) [Hino-DX]

Check if P081A has been detected in [Engine].

DTC P081A

has been

detected. Go

to YES.

No DTC has

been detected.

Go to NO.

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Procedure completed. Perform "Afterinspection work" of INFORMATION section.

Page 11

ENGINE CONTROL SYSTEM (J08E)4–788

%L9

(STA)

K01

(S+)

K04

(NC)

NK0

(NO)

(ST)

N6E

(CL2-)

%L7 (STA)

ATM starter relay

Starter cut relay

LL1K01

K0G%D7

K0G

(STCR)

LL1

Engine

ECU

SAPH16F010300636

DTC: P081B

P081B: Starter Disable Circuit High

INFORMATION

EN01H16F01030F03001099

1. Technical description

• The starter cut relay prevents further rotations of the starter when the starter switch is turned after start of the engine.

• Harness +B short-circuit is detected.

2. DTC set condition

(1) DTC detection condition

• Request for deactivation of starter block is in progress (while engine is stopped).

• Starter switch ON.

• Battery voltage is 10 V – 16 V.

Above conditions continue for at least 5 seconds.

(2) Judgement criteria

• Output of the starter cut relay remains at 10 V or more for 3 seconds or longer.

3. Reset condition

• After restoration to normal condition.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: OFF

• Diag lamp: OFF

5. Symptoms on the vehicle when the DTC is set

• –

• Starter may not turn over. (If the starter turns over it will not interfere with engine operation.)

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

Page 12

ENGINE CONTROL SYSTEM (J08E) 4–789

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is stored after test drive.

8. Estimated failure factors

• Harness disconnection or short-circuit

• Looseness or poor contact of connector

• Starter cut relay failure

• Engine ECU failure

Page 13

ENGINE CONTROL SYSTEM (J08E)4–790

NOYES

A B

V80

SAPH16F010300637

INSPECTION PROCEDURE: P081B

Inspect the starter cut relay connector

Was any failure found?

1. Check the connection of the starter cut relay connector (Looseness and poor contact).

Connect securely, repair if needed. Perform "After-inspection work" of INFORMATION section.

Inspect for disconnection in wire harness of starter cut relay

1. Set the starter switch to the "LOCK" position.

2. Connect the signal check harness to the engine ECU.

3. Set the starter switch to the "ON" position.

4. Use the electrical tester to measure the resistance between the terminals of the engine ECU (signal check harness).

Measurement

conditions

Starter switch: ON

Do the measurements meet the standard value?

Go to step 2.

Tester connections Standard values

Engine ECU (signal check harness) STCR(V2) – PGD4(V80)

3 V or less

Go to step 3. Repair or replace the harness.

Perform "After-inspection work" of INFORMATION section.

Page 14

ENGINE CONTROL SYSTEM (J08E) 4–791

NOYES

Select

Engine

SAPH16F010300638

Check the DTC detected (Engine ECU) [Hino-DX]

1. Set the starter switch to the "ON" position.

2. Select [Engine] and check if P081B has been detected in [Fault

Has DTC P081B been detected?

Information].

Replace the engine ECU. Perform "After-inspection work" of INFORMATION section.

Procedure completed. Perform "After-inspection work" of INFORMATION section.

Page 15

ENGINE CONTROL SYSTEM (J08E)4–792

CHECKLIST: P081B

DTC: P081B Starter Disable Circuit High Inspection procedure

Step Action Description Judgement

Failure found: Inspect the starter cut

relay connector

Inspect for disconnection in

wire harness of starter cut relay

Check the DTC detected

(Engine ECU) [Hino-DX]

Check the connection of the starter cut relay connector (Looseness and poor contact).

Check if P081B has been detected in [Engine].

Go to YES.

No failure

found: Go to

NO.

The measure-

ments meet

the standard

value: Go to

YES.

The measure-

ments do not

meet the stan-

dard value: Go

to NO.

DTC P081B

has been

detected: Go

to YES.

No DTC has

been detected:

Go to NO.

Check

(Yes/No)

Yes No

Connect securely, repair if needed. Perform "Afterinspection work" of INFORMATION section.

Go to step 3.

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Go to step 2.

Repair or replace the harness. Perform "Afterinspection work" of INFORMATION section.

Procedure completed. Perform "Afterinspection work" of INFORMATION section.

Page 16

ENGINE CONTROL SYSTEM (J08E) 4–793

SAPH16F010300639

DTC: P0850

P850: Neutral switch - rationality

INFORMATION

K45NRF

N1N

(NUSW)

Engine

ECU

K45

NRF

(-)

Neutral switch

#LH#LH

%DW

(NTSW)

NRE

(+)

NRE NRF

%G1

(NSIG)

%DX (NTSW)

OFF

#D4#D4

KSM (SW+)

EN01H16F01030F03001100

Neutral switch

%17

(SIG)

Vehicle control ECU

L98

(NUSW)

A1J

(33LD)

DPR refresh switch

1. Technical description

• Through the neutral switch, the ECU senses neutral signals when the transmission lever is in the P or N range.

• The neutral switch cannot correctly sense.

2. DTC set condition

(1) Check conditions

After the starter switch is set to ON position, the status described below remains for 10 seconds.

• Vehicle speed is 31.25 miles/h or higher.

• Battery voltage is in the range of 10 V to 16 V.

• After that, vehicle speed is 0 miles/h.

(2) Judgement criteria

• The neutral switch cannot be switched twice.

3. Reset condition

• Immediately after normal operation is restored.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

• Cruise control is not available.

Page 17

ENGINE CONTROL SYSTEM (J08E)4–794

5. Symptoms on the vehicle when the DTC is set

• Cruise control does not work.

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is stored after test drive.

8. Estimated failure factors

• Harness disconnection or short-circuit

• Malfunction of neutral switch

• Malfunction of ECU

Page 18

ENGINE CONTROL SYSTEM (J08E) 4–795

NOYES

NRF(-) NRE(+)

SAPH16F010300640

INSPECTION PROCEDURE: P0850

Inspect the neutral switch

Was any failure found?

1. Check if the neutral switch is properly adjusted.

Adjust the neutral switch. Perform "After-inspection work" of INFORMATION section.

Inspect the neutral switch connector

Was any failure found?

Connect securely, repair if needed. Perform "After-inspection work" of INFORMATION section.

Inspect the neutral switch unit

Go to step 2.

1. Check the connection of the neutral switch connector (Looseness and poor contact).

Go to step 3.

1. Set the starter switch to the "LOCK" position.

Do the measurements meet the standard value?

2. Disconnect the neutral switch connector.

3. Use the electrical tester to measure the resistance between the terminals of the neutral switch.

Measurement

conditions

Starter switch: LOCK

Tester connections Standard values

Shift lever in N posiNeutral switch NRE – NRF

tion: < 1 

Shift lever in any

other position:  

Page 19

ENGINE CONTROL SYSTEM (J08E)4–796

NOYES

NRE(+) NRF(-)

SAPH16F010300641

Go to step 4. Replace the neutral switch.

Perform "After-inspection work" of INFORMATION section.

Inspect the power supply of the neutral switch

1. Set the starter switch to the "ON" position.

2. Use the electrical tester to measure the voltage between the NRE terminal in the neutral switch vehicle-side connector and ground.

Measurement

conditions

Starter switch: ON

Tester connections Standard values

Neutral switch vehicle-side connector NRE – Ground

More than 10 V

Do the measurements meet the standard value?

Go to step 5. Repair the neutral switch power circuit.

Perform "After-inspection work" of INFORMATION section.

Page 20

NOYES

Inspect the neutral switch harness

V11

SAPH16F010300642

ENGINE CONTROL SYSTEM (J08E) 4–797

1. Set the starter switch to the "LOCK" position.

2. Connect the neutral switch connector.

3. Connect the signal check harness to the engine ECU vehicle-side harness. (Do not connect the harness to the ECU.)

4. Set the starter switch to the "ON" position.

5. Use the electrical tester to measure the voltage between the terminals of the engine ECU (signal check harness) and ground.

Measurement

conditions

Starter switch: ON

Do the measurements meet the standard value?

Replace the engine ECU. Perform "After-inspection work" of INFORMATION section.

Tester connections Standard values

Engine ECU (signal check harness) NUSW(V11) – Ground

Shift lever in N position: ≥ 10 V Shift lever in any other position: ≤ 0.5 V

Repair or replace the harness. Perform "After-inspection work" of INFORMATION section.

Page 21

ENGINE CONTROL SYSTEM (J08E)4–798

CHECKLIST: P0850

DTC: P0850 Neutral switch - rationality Inspection procedure

Step Action Description Judgement

Failure found: Go to YES.

Inspect the

neutral switch

Inspect the

neutral switch connector

Inspect the

neutral switch unit

Check if the neutral switch is properly adjusted.

Check the connection of the neutral switch connector (Looseness and poor contact).

Measure the resistance between the terminals of the neutral switch. <Tester connections> Neutral switch NRE – NRF <Standard values> Shift lever in N position: < 1  Shift lever in any other position: 



No failure found: Go to NO.

Failure found: Go to YES.

No failure found: Go to NO.

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Check

(Yes/No)

Yes No

Adjust the neutral switch. Perform "Afterinspection work" of INFORMATION section.

Connect securely. repair if needed. Perform "Afterinspection work" of INFORMATION section.

Go to step 4.

Go to step 2.

Go to step 3.

Replace the neutral switch. Perform "Afterinspection work" of INFORMATION section.

Inspect the power supply

of the neutral switch

Measure the voltage between the NRE terminal in the neutral switch vehicle-side connector and ground. <Tester connections> Neutral switch vehicle-side connector NRE – Ground <Standard values> More than 10 V

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Go to step 5.

Repair the neutral switch power circuit. Perform "Afterinspection work" of INFORMATION section.

Page 22

ENGINE CONTROL SYSTEM (J08E) 4–799

DTC: P0850 Neutral switch - rationality Inspection procedure

Step Action Description Judgement

1. Connect the neutral switch connector.

Inspect the

neutral switch harness

2. Connect the signal check harness, and measure the voltage between the terminals of the engine ECU (signal check harness) and ground.

<Tester connections> Engine ECU (signal check harness) NUSW(V11) – Ground <Standard values>

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Shift lever in N position: ≥ 10 V Shift lever in any other position: ≤

0.5 V

Check

(Yes/No)

Yes No

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Repair or replace the harness. Perform "Afterinspection work" of INFORMATION section.

Page 23

ENGINE CONTROL SYSTEM (J08E)4–800

SAPH16F010300643

DTC: P1133

P1133: PTO accelerator sensor (Hi)

INFORMATION

PTO accelerator sensor

(VCC)

K95

Exhaust gas temperature sensor (DOC outlet)

KSE

(TEX1)

KSF

(GND1)

Differential pressure sensor

KSJ

(VCC)

KSK

(VOUT)

KSL

(GND)

EN01H16F01030F03001101

Exhaust gas temperature sensor (DOC inlet)

LCY

(TEX3)

LCZ

(GND3)

KSE KR4

LCG

(ET4+)

KSJ KUQ

KUQ

(AVC5)

KSK KUH

KUH

(EXPS)

KSF LCT

LCT

(ADG9)

Engine

ECU

LCY LCG

KR4

(ET2+)

1. Technical description

• The operational accelerator sensor measures accelerator opening if PTO (power take off) is used. (This applies only

to PTO-equipped vehicles.)

• The operational accelerator sensor cannot correctly sense.

• +B short-circuit is likely to have occurred.

2. DTC set condition

(1) Check conditions

• Starter switch ON.

• Battery voltage is in the range of 10 V to 16 V.

The conditions described above remain for 5 seconds or longer.

(2) Judgement criteria

• Sensor voltage remains at 4.82 V or higher for 3 seconds or longer.

3. Reset condition

• After normal operation is restored and starter switch is turned LOCK.

Page 24

ENGINE CONTROL SYSTEM (J08E) 4–801

4. Indication, warning or system control regulation when the DTC is set.

• MIL: OFF

• Diag lamp: OFF

• Body mounting control is not available.

5. Symptoms on the vehicle when the DTC is set

• Body mounting control is not working.

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is stored after test drive.

8. Estimated failure factors

• Faulty harness (+B short-circuit)

• Malfunction of sensor

• Failure in engine ECU sensor power supply or internal circuit

Page 25

ENGINE CONTROL SYSTEM (J08E)4–802

NOYES

INSPECTION PROCEDURE: P1133

Inspect the PTO accelerator sensor connector

Was any failure found?

1. Check the connection of the PTO accelerator sensor connector (Looseness and poor contact).

Connect securely, repair if needed. Perform "After-inspection work" of INFORMATION section.

Inspect the PTO accelerator sensor

Was any failure found?

Clean the PTO accelerator sensor and install it properly. If damaged, replace the sensor. Perform "After-inspection work" of INFORMATION section.

Go to step 2.

1. Check the installation of the PTO accelerator sensor.

2. Make sure there is no dirt or damage to the PTO accelerator sensor.

Go to step 3.

Page 26

ENGINE CONTROL SYSTEM (J08E) 4–803

NOYES

VCCSIG

GND

SIG

SAPH16F010300644

Inspect the PTO accelerator sensor unit

1. Set the starter switch to the "LOCK" position.

2. Disconnect the PTO accelerator sensor connector.

3. Use the electrical tester to measure the resistance between the terminals of the PTO accelerator sensor.

Measurement

conditions

Tester connections Standard values

PTO accelerator Starter switch: LOCK

sensor

SIG – VCC

More than 2 

SIG – GND

Do the measurements meet the standard value?

Go to step 4. Replace the PTO accelerator sensor.

Perform "After-inspection work" of INFORMATION section.

Page 27

ENGINE CONTROL SYSTEM (J08E)4–804

NOYES

V71

V68

V45

SAPH16F010300645

Inspect for short-circuit of the PTO accelerator sensor harness

1. Connect the signal check harness to the engine ECU. (Do not connect the harness to the ECU.)

2. Use the electrical tester to measure the resistance between the terminals of the engine ECU (signal check harness) and ground.

Measurement

conditions

Starter switch: LOCK

Tester connections Standard values

Engine ECU (signal check harness) ASCS(V68) – Ground AVC5(V71) – Ground ADG7(V45) – Ground

 

Do the measurements meet the standard value?

Go to step 5. Repair or replace the harness.

Perform "After-inspection work" of INFORMATION section.

Page 28

ENGINE CONTROL SYSTEM (J08E) 4–805

NOYES

V45

V68

V71

V68

SAPH16F010300646

Select

Engine

SAPH16F010300647

Inspect disconnection of the PTO accelerator sensor harness

1. Connect the PTO accelerator sensor connector.

2. Use the electrical tester to measure the resistance between the terminals of the engine ECU (signal check harness).

Measurement

conditions

Starter switch: LOCK

Tester connections Standard values

Engine ECU (signal check harness) ASCS(V68) – AVC5(V71) ASCS(V68) – ADG7(V45)

More than 2 

Do the measurements meet the standard value?

Go to step 6. Repair or replace the harness.

Perform "After-inspection work" of INFORMATION section.

Check the DTC detected (Engine ECU) [Hino-DX]

1. Connect the vehicle to Hino-DX.

2. Set the starter switch to the "ON" position.

3. Select [Engine] and check if P1133 has been detected in [Fault

Has DTC P1133 been detected?

Replace the engine ECU. Perform "After-inspection work" of INFORMATION section.

Information].

Procedure completed. Perform "After-inspection work" of INFORMATION section.

Page 29

ENGINE CONTROL SYSTEM (J08E)4–806

CHECKLIST: P1133

DTC: P1133 PTO accelerator sensor (Hi) Inspection procedure

Step Action Description Judgement

Failure found: Inspect the PTO accelera-

tor sensor connector

Check the connection of the PTO accelerator sensor connector (Looseness and poor contact).

Go to YES.

No failure

found: Go to

NO.

Inspect the

PTO accelerator sensor

1. Check the installation of the PTO accelerator sensor.

2. Make sure there is no dirt or damage to the PTO accelerator sensor.

Failure found: Go to YES.

No failure found: Go to NO.

Check

(Yes/No)

Yes No

Connect securely, repair if needed. Perform "Afterinspection work" of INFORMATION section.

Clean the PTO accelerator sensor and install it properly. If damaged, replace the sensor. Perform "Afterinspection work" of INFORMATION section.

Go to step 2.

Go to step 3.

Inspect the

PTO accelerator sensor unit

Inspect for short-circuit of

the PTO accelerator sensor harness

Disconnect the PTO accelerator sensor connector and measure the resistance between the terminals of the PTO accelerator sensor. <Tester connections> PTO accelerator sensor SIG – VCC SIG – GND <Standard values> More than 2 

Connect the signal check harness to the engine ECU. (Do not connect harness to the ECU.) Measure the resistance between the terminals of the engine ECU (signal check harness) and ground. <Tester connections> Engine ECU (signal check harness) ASCS(V68) – Ground AVC5(V71) – Ground <Standard values>  

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Go to step 4.

Go to step 5.

Replace the sensor. Perform "Afterinspection work" of INFORMATION section.

Repair or replace the harness. Perform "Afterinspection work" of INFORMATION section.

Page 30

ENGINE CONTROL SYSTEM (J08E) 4–807

DTC: P1133 PTO accelerator sensor (Hi) Inspection procedure

Step Action Description Judgement

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

DTC P1133 has been detected: Go to YES.

No DTC has been detected: Go to NO.

Inspect disconnection of

the PTO accelerator sensor harness

Check the DTC detected

(Engine ECU) [Hino-DX]

Connect the PTO accelerator sensor connector and measure the resistance between the terminals of the engine ECU (signal check harness). <Tester connections> ASCS(V68) – AVC5(V71) ASCS(V68) – ADG7(V45) <Standard values> More than 2 

Check if P1133 has been detected in [Engine].

Check

(Yes/No)

Yes No

Go to step 6.

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Repair or replace the harness. Perform "Afterinspection work" of INFORMATION section.

Procedure completed. Perform "Afterinspection work" of INFORMATION section.

Page 31

ENGINE CONTROL SYSTEM (J08E)4–808

SAPH16F010300648

DTC: P119F

P119F: Fuel rail pressure sensor - rationality

INFORMATION

K8N (PCR-)

GND1

K8P (PCR)

Common rail pressure sensor

PCR-

K8N

PCR-

K8N

PCR-

K8N

PCR-

K8N

PCR-

K8N

SIG1

VCC1

GND2

SIG2

VCC2

K8M (PCR+)

LLK (PCR-)

LLH (PCR)

LLJ (PCR+)

Common rail

Pressure limiter

Flow damper

K6D

KRX

K6E

KRP

KRY

LL3

KRQ

LCE

Pressure sensor

(PCR1)

(AGD1)

(PCR2)

(AVC1)

(AGD2)

(PCR4)

(AVC2)

(PCR3)

EN01H16F01030F03001102

Engine

ECU

1. Technical description

• The common rail pressure sensor consistently measures common rail pressure.

• Common rail pressure cannot be correctly sensed.

• Malfunction is likely to have occurred in the common rail pressure sensor.

2. DTC set condition

(1) Check conditions

• Starter switch ON.

• Battery voltage is in the range of 10 V to 16 V.

• The conditions described above remain for 5 seconds or longer.

• Common rail pressure is 220 MPa or less.

• No other diagnosis codes are present (the monitor disable DTC table can be referred to)

(2) Judgement criteria

P119F is detected under the conditions described below. 1 and 2 represent the order of priority.

1. A difference in voltage remains higher than 1.06 V for 3 seconds or longer.

2. A difference in voltage remains less than 0.04 V for 3 seconds or longer.

3. Reset condition

• After normal operation is restored and starter switch LOCK.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

5. Symptoms on the vehicle when the DTC is set

• –

Page 32

ENGINE CONTROL SYSTEM (J08E) 4–809

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is stored after test drive.

8. Estimated failure factors

• Sensor disconnected from measuring site

• Harness disconnection or short-circuit

• Abnormal resistance of sensor

• Malfunction of ECU

Page 33

ENGINE CONTROL SYSTEM (J08E)4–810

NOYES

SAPH16F010300649

INSPECTION PROCEDURE: P119F

Check the DTC detected 1 (Engine ECU) [Hino-DX]

1. Set the starter switch to the "LOCK" position.

2. Connect the vehicle to Hino-DX.

Select

Engine

3. Set the starter switch to the "ON" position.

4. Select [Engine] and check if any DTC other than P119F (for example, P0192, P0193) have been detected in [Fault Information].

Has a DTC other than P119F been detected?

Go to the diagnostic procedure of a related DTC.

Inspect the common rail pressure sensor connector

1. Check the connection of the common rail pressure sensor connector (Looseness and poor contact).

Go to step 2.

Was any failure found?

Connect securely, repair if needed. Perform "After-inspection work" of INFORMATION section.

Go to step 3.

Page 34

NOYES

Inspect the sensor power supply

C D

E13

E33 E76

E56

E49

E56

E68

E64

E76

E65

SAPH16F010300650

ENGINE CONTROL SYSTEM (J08E) 4–811

1. Set the starter switch to the "LOCK" position.

2. Connect the signal check harness to the engine ECU.

3. Disconnect the common rail pressure sensor connector.

4. Set the starter switch to the "ON" position.

5. Use the electrical tester to measure the voltage between the terminals of the engine ECU (signal check harness).

Measurement

conditions

Tester connections Standard values

Engine ECU (signal check harness)

AVC1(E13) – AGD1(E56) Starter switch: ON

PCR1(E49) – AGD1(E56)

PCR2(E68) – AGD1(E56)

AVC2(E33) – AGD2(E76)

PCR3(E64) – AGD2(E76)

PCR4(E65) – AGD2(E76)

Do the measurements meet the standard value?

Go to step 4. Replace the engine ECU.

Perform "After-inspection work" of INFORMATION section.

4.5 – 5.5 V

Page 35

ENGINE CONTROL SYSTEM (J08E)4–812

NOYES

E49

E68

E65

E64

SAPH16F010300651

Select

Engine

SAPH16F010300652

Inspect the signal of the common rail pressure sensor

1. Set the starter switch to the "LOCK" position.

2. Connect the common rail pressure sensor connector.

3. Set the starter switch to the "ON" position.

4. Use the electrical tester to measure the voltage between the terminals of the engine ECU (signal check harness).

Measurement

conditions

Tester connections Standard values

Engine ECU (signal

check harness) Starter switch: ON

PCR1(E49) – PCR3(E64)

PCR1(E49) – PCR4(E65)

0.3 – 0.7 V

PCR2(E68) – PCR3(E64)

PCR2(E68) – PCR4(E65)

Do the measurements meet the standard value?

Go to step 5. Replace the common rail pressure sensor.

Perform "After-inspection work" of INFORMATION section.

Check the DTC detected 2(Engine ECU) [Hino-DX]

1. Perform engine warm-up. (engine coolant temperature: 60 C {140 F} or more)

Has DTC P119F been detected?

Replace the engine ECU. Perform "After-inspection work" of INFORMATION section.

2. Stop the engine and set the starter switch to the "ON" position.

3. Select [Engine] and check if P119F has been detected in [Fault Information].

Procedure completed. Perform "After-inspection work" of INFORMATION section.

Page 36

ENGINE CONTROL SYSTEM (J08E) 4–813

CHECKLIST: P119F

DTC: P119F Fuel rail pressure sensor - rationality Inspection procedure

Step Action Description Judgement

DTC other than P119F

has been Check the DTC detected

1 (Engine ECU) [HinoDX]

Check if any DTC other than P119F (for example P0192, P0193) has not been detected in [Engine].

detected: Go

to YES.

DTC other

than P119F

has not been

detected: Go

to NO.

Failure found: Inspect the common rail

pressure sensor connector

Check the connection of the common rail pressure sensor connector (Looseness and poor contact).

Go to YES.

No failure

found: Go to

NO.

1. Connect the signal check harness to the engine and disconnect the common rail pressure sensor connector.

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Inspect the

sensor power supply

2. Measure the voltage between the terminals of the engine ECU (signal check harness).

<Tester connections> Engine ECU (signal check harness) AVC1(E13) – AGD1(E56) PCR1(E49) – AGD1(E56) PCR2(E68) – AGD1(E56) AVC2(E33) – AGD2(E76) PCR3(E64) – AGD2(E76) PCR4(E65) – AGD2(E76) <Standard values>

4.5 – 5.5 V

Check

(Yes/No)

Yes No

Go to the diagnostic procedure of a related DTC.

Connect securely, repair if needed. Perform "Afterinspection work" of INFORMATION section.

Go to step 4.

Go to step 2.

Go to step 3.

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Page 37

ENGINE CONTROL SYSTEM (J08E)4–814

DTC: P119F Fuel rail pressure sensor - rationality Inspection procedure

Step Action Description Judgement

Connect the common rail pres-

Inspect the signal of the

common rail pressure sensor

sure sensor connector and measure the voltage between the terminals of the engine ECU (signal check harness). <Tester connections> Engine ECU (signal check harness) PCR1(E49) – PCR3(E64) PCR1(E49) – PCR4(E65) PCR2(E68) – PCR3(E64) PCR2(E68) – PCR4(E65) <Standard values>

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

0.3 – 0.7 V

DTC P119F has been detected: Go to YES.

No DTC has been detected:

Check the DTC detected

2 (Engine ECU) [HinoDX]

1. Perform engine warm-up. (engine coolant temperature: 60 C {140 F} or more)

2. Check if P119F has been detected in [Engine].

Go to NO.

Check

(Yes/No)

Yes No

Go to step 5.

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Replace the sensor. Perform "Afterinspection work" of INFORMATION section.

Procedure completed. Perform "Afterinspection work" of INFORMATION section.

Page 38

ENGINE CONTROL SYSTEM (J08E) 4–815

DTC: P141F

P141F: Burner system malfunction

INFORMATION

1. Technical description

• Malfunction in the burner system is diagnosed by BCU.

• Determine system in the BCU and diagnose malfunction on Hino-DX.

• BCU detects burner system failure.

2. DTC set condition

(1) Check conditions

• –

(2) Judgement criteria

• –

3. Reset condition

• Immediately after normal operation is restored.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

• Engine output is restricted.

EN01H16F01030F03001103

5. Symptoms on the vehicle when the DTC is set

• Engine output is insufficient.

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is detected after test drive.

8. Estimated failure factors

• –

Page 39

ENGINE CONTROL SYSTEM (J08E)4–816

NOYES

Select

Engine

SAPH16F010300653

INSPECTION PROCEDURE: P141F

Check the DTC detected (Engine ECU) [Hino-DX]

Has DTC P141F been detected?

1. Set the starter switch to the "LOCK" position.

2. Connect the vehicle to Hino-DX.

3. Set the starter switch to the "ON" position.

4. Select [Engine] and check if P141F has been detected in [Fault Information].

Go to DTC separate trouble diagnosis of the burner system (BCU).

Procedure completed. Perform "After-inspection work" of INFORMATION section.

Page 40

ENGINE CONTROL SYSTEM (J08E) 4–817

CHECKLIST: P141F

DTC: P141F Burner system malfunction Inspection procedure

Step Action Description Judgement

DTC P141F

has been Check the DTC detected

(Engine ECU) [Hino-DX]

Check if P141F has been detected in [Engine].

detected: Go

to YES.

No DTC has

been detected:

Go to NO.

Check

(Yes/No)

Yes No

Go to DTC separate trouble diagnosis of the burner system (BCU).

Procedure completed. Perform "Afterinspection work" of INFORMATION section.

Page 41

ENGINE CONTROL SYSTEM (J08E)4–818

(ET4+)

(ET2+)

(EXPS)

(ADG9)

(AVC5)

KR4

(GND3)

(TEX3)

KUH

LCT

KUQ

(VOUT)

(GND)

KSK

KSL

(VCC)

KSJ

LCY

LCZ

LCY LCG

KSF LCT

KSK KUH

KSJ KUQ

KSE KR4

LCY LCG

KSF LCT

KSK KUH

KSJ KUQ

KSE KR4

(GND1)

(TEX1)

KSE

KSF

Differential pressure sensor

LCG

Exhaust gas temperature sensor (DOC outlet)

Exhaust gas temperature sensor (DOC inlet)

Engine

ECU

SAPH16F010300654

DTC: P1426

P1426: Differential pressure sensor - rationality

INFORMATION

EN01H16F01030F03001104

1. Technical description

• It detects a difference between pressure at the inlet of the muffler and atmospheric pressure and monitors any failure

or malfunction of the DPR.

• DPR differential pressure sensor is recognized as being stuck or in characteristics failure condition.

2. DTC set condition

(1) Check conditions

• Elapse of at least 2 seconds after engine stop

• No other DTCs are present.

(2) Judgement criteria

• Differential pressure remains less than -2 kPa {-0.3 psi} or higher than +2 kPa {+0.3 psi} for 2 seconds.

3. Reset condition

• Immediately after normal operation is restored.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

5. Symptoms on the vehicle when the DTC is set

• –

Page 42

ENGINE CONTROL SYSTEM (J08E) 4–819

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is stored after test drive.

8. Estimated failure factors

• Loose/disconnected sensor and failure in sensing area (contamination or clogging)

• Abnormality in resistance of sensor

• Malfunction of engine ECU sensor power supply or internal circuit

Page 43

ENGINE CONTROL SYSTEM (J08E)4–820

NOYES

INSPECTION PROCEDURE: P1426

Check the differential pressure hose and pipe

Was any failure found?

1. Check if the differential pressure hose and pipe are cracked, bent, ruptured, or clogged.

Clean or replace the differential pressure hose and pipe. Perform "After-inspection work" of INFORMATION section.

Inspect the differential pressure sensor connector

1. Check the connection of the differential pressure sensor connector

Was any failure found?

Connect securely, repair if needed. Perform "After-inspection work" of INFORMATION section.

Inspect the differential pressure sensor

Go to step 2.

(Looseness and poor contact).

Go to step 3.

1. Check the installation of the differential pressure sensor.

2. Make sure there is no dirt or damage to the differential pressure sensor.

Was any failure found?

Clean the differential pressure sensor and install it properly. If damaged, replace the differential pressure sensor. Perform "After-inspection work" of INFORMATION section.

Go to step 4.

Page 44

ENGINE CONTROL SYSTEM (J08E) 4–821

NOYES

GND

VCC

GND

VOUT

SAPH16F010300655

V70

V71

V46

SAPH16F010300656

Inspect the differential pressure sensor unit

1. Set the starter switch to the "LOCK" position.

2. Disconnect the DPR differential pressure sensor connector.

3. Use the electrical tester to measure the resistance between the terminals of the differential pressure sensor.

Measurement

conditions

Tester connections Standard values

Differential presStarter switch: LOCK

sure sensor

VCC – GND

2 – 15 k

VOUT – GND

Do the measurements meet the standard value?

Go to step 5. Replace the differential pressure sensor.

Perform "After-inspection work" of INFORMATION section.

Inspect for short-circuit of the differential pressure sensor harness

1. Set the starter switch to the "LOCK" position.

2. Connect the signal check harness to the engine ECU vehicle-side harness. (Do not connect the harness to the ECU.)

3. Use the electrical tester to measure the resistance between the terminals of the engine ECU (signal check harness) and ground.

Measurement

conditions

Engine ECU (signal

Starter switch: LOCK

check harness) AVC5(V71) – Ground EXPS(V70) – Ground AGD9(V46) – Ground

Do the measurements meet the standard value?

Tester connections Standard values

 

Page 45

ENGINE CONTROL SYSTEM (J08E)4–822

NOYES

V70

V71

V70

V46

SAPH16F010300657

Go to step 6. Repair or replace the harness.

Perform "After-inspection work" of INFORMATION section.

Inspect disconnection of the differential pressure sensor harness

1. Connect the differential pressure sensor connector.

2. Use the electrical tester to measure the resistance between the terminals of the engine ECU (signal check harness).

Measurement

conditions

Starter switch: LOCK

Tester connections Standard values

Engine ECU (signal check harness) AVC5(V71) – EXPS(V70) AGD9(V46) – EXPS(V70)

2 – 15 k

Do the measurements meet the standard value?

Go to step 7. Repair or replace the harness.

Perform "After-inspection work" of INFORMATION section.

Page 46

ENGINE CONTROL SYSTEM (J08E) 4–823

NOYES

Select

Engine

SAPH16F010300658

Check the DTC detected (Engine ECU) [Hino-DX]

1. Perform engine warm-up. (engine coolant temperature: 60 C {140

2. Stop the engine and set the starter switch to the "LOCK" position.

3. Connect the vehicle to Hino-DX.

4. Set the starter switch to the "ON" position.

5. Select [Engine] and check if P1426 has been detected in [Fault

Has DTC P1426 been detected?

F} or more)

Information].

Replace the engine ECU. Perform "After-inspection work" of INFORMATION section.

Procedure completed. Perform "After-inspection work" of INFORMATION section.

Page 47

ENGINE CONTROL SYSTEM (J08E)4–824

CHECKLIST: P1426

DTC: P1426 Differential pressure sensor - rationality Inspection procedure

Step Action Description Judgement

Failure found: Check the differential pres-

sure hose and pipe

Check if the differential pressure hose and pipe are cracked, bent, ruptured, or clogged.

Go to YES.

No failure

found: Go to

NO.

Failure found: Inspect the differential pres-

sure sensor connector

Check the connection of the differential pressure sensor connector (Looseness and poor contact).

Go to YES.

No failure

found: Go to

NO.

Inspect the dif-

ferential pressure sensor

1. Check the installation of the differential pressure sensor.

2. Make sure there is no dirt or damage to the differential pressure sensor.

Failure found: Go to YES.

No failure found: Go to NO.

Check

(Yes/No)

Yes No

Clean or replace the differential pressure hose and pipe. Perform "Afterinspection work" of INFORMATION section.

Connect securely, repair if needed. Perform "Afterinspection work" of INFORMATION section.

Clean the differential pressure sensor and install it properly. If damaged, replace the sensor. Perform "Afterinspection work" of INFORMATION section.

Go to step 2.

Go to step 3.

Go to step 4.

Inspect the differential pres-

sure sensor unit

Disconnect the DPR differential pressure sensor connector and measure the resistance between the terminals of the differential pressure sensor. <Tester connections> Differential pressure sensor VCC – GND VOUT – GND <Standard values> 2 – 15 k

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Go to step 5.

Replace the sensor. Perform "Afterinspection work" of INFORMATION section.

Page 48

ENGINE CONTROL SYSTEM (J08E) 4–825

DTC: P1426 Differential pressure sensor - rationality Inspection procedure

Step Action Description Judgement

Connect the signal check harness to the engine ECU. (Do not con-

Inspect for short-circuit of

the differential pressure sensor harness

nect harness to the ECU.) and measure the resistance between the terminals of the engine ECU (signal check harness) and ground. <Tester connections> Engine ECU (signal check harness) AVC5(V71) – Ground EXPS(V70) – Ground AGD9(V46) – Ground

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

<Standard values>  

Inspect disconnection of

the differential pressure sensor harness

Connect the differential pressure sensor connector and measure the resistance between the terminals of the engine ECU (signal check harness). <Tester connections> Engine ECU (signal check harness) AVC5(V71) – EXPS(V70) AGD9(V46) – EXPS(V70) <Standard values> 2 – 15 k

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Check

(Yes/No)

Yes No

Go to step 6.

Go to step 7.

Repair or replace the harness. Perform "Afterinspection work" of INFORMATION section.

Check the DTC detected.

(Engine ECU) [Hino-DX]

1. Perform engine warm-up. (engine coolant temperature: 60 C {140 F} or more)

2. Check if P1426 has been detected in [Engine].

DTC P1426 has been detected: Go to YES.

No DTC has been detected: Go to NO.

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Procedure completed. Perform "Afterinspection work" of INFORMATION section.

Page 49

ENGINE CONTROL SYSTEM (J08E)4–826

(ET4+)

(ET2+)

(EXPS)

(ADG9)

(AVC5)

KR4

(GND3)

(TEX3)

KUH

LCT

KUQ

(VOUT)

(GND)

KSK

KSL

(VCC)

KSJ

LCY

LCZ

LCY LCG

KSF LCT

KSK KUH

KSJ KUQ

KSE KR4

LCY LCG

KSF LCT

KSK KUH

KSJ KUQ

KSE KR4

(GND1)

(TEX1)

KSE

KSF

Differential pressure sensor

LCG

Exhaust gas temperature sensor (DOC outlet)

Exhaust gas temperature sensor (DOC inlet)

Engine

ECU

SAPH16F010300659

DTC: P1427

P1427: Differential pressure sensor - out of range (Out of range low)

INFORMATION

EN01H16F01030F03001105

1. Technical description

• It detects a difference between pressure at the inlet of the muffler and atmospheric pressure and monitors any failure

or malfunction of the DPR.

• Exhaust pressure cannot be correctly recognized.

• Possible DPR differential pressure sensor failure, harness disconnection, or GND short-circuit

2. DTC set condition

(1) Check conditions

• Starter switch ON.

• Battery voltage is in the range of 10 V to 16 V.

The conditions described above remain for 5 seconds or longer.

(2) Judgement criteria

• Output of the sensor remains less than 0.5 V (-6.41 kPa {-0.93 psi}) for 3 seconds.

3. Reset condition

• Immediately after normal operation is restored.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

Page 50

ENGINE CONTROL SYSTEM (J08E) 4–827

5. Symptoms on the vehicle when the DTC is set

• –

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is stored after test drive.

8. Estimated failure factors

• Abnormal resistance of sensor

• Harness disconnection or short-circuit

• Looseness or poor contact of connector.

• Malfunction of engine ECU sensor power supply or internal circuit.

Page 51

ENGINE CONTROL SYSTEM (J08E)4–828

NOYES

INSPECTION PROCEDURE: P1427

Inspect the differential pressure sensor connector

Was any failure found?

1. Check the connection of the differential pressure sensor connector (Looseness and poor contact).

Connect securely, repair if needed. Perform "After-inspection work" of INFORMATION section.

Inspect the differential pressure sensor

Was any failure found?

Clean the differential pressure sensor and install it properly. If damaged, replace the differential pressure sensor. Perform "After-inspection work" of INFORMATION section.

Go to step 2.

1. Check the installation of the differential pressure sensor.

2. Make sure there is no dirt or damage to the differential pressure sensor.

Go to step 3.

Page 52

ENGINE CONTROL SYSTEM (J08E) 4–829

NOYES

GND

VCC

GND

VOUT

SAPH16F010300660

VCC

GND

SAPH16F010300661

Inspect the differential pressure sensor unit

1. Set the starter switch to the "LOCK" position.

2. Disconnect the DPR differential pressure sensor connector.

3. Use the electrical tester to measure the resistance between the terminals of the differential pressure sensor.

Measurement

conditions

Tester connections Standard values

Differential presStarter switch: LOCK

sure sensor

VCC – GND

2 – 15 k

VOUT – GND

Do the measurements meet the standard value?

Go to step 4. Replace the differential pressure sensor.

Perform "After-inspection work" of INFORMATION section.

Inspect the power supply of the differential pressure sensor

1. Set the starter switch to the "ON" position.

2. Use the electrical tester to measure the voltage between the terminals of the differential pressure sensor vehicle-side connector.

Measurement

conditions

Tester connections Standard values

Differential pres-

Starter switch: ON

sure sensor vehicleside connector VCC – GND

Do the measurements meet the standard value?

Go to step 5. Go to step 7.

4.5 – 5.5 V

Page 53

ENGINE CONTROL SYSTEM (J08E)4–830

NOYES

V70

V71

V46

SAPH16F010300662

Inspect for short-circuit of the differential pressure sensor harness

1. Set the starter switch to the "LOCK" position.

2. Connect the signal check harness to the engine ECU vehicle-side harness. (Do not connect the harness to the ECU.)

3. Use the electrical tester to measure the resistance between the terminals of the engine ECU (signal check harness) and ground.

Measurement

conditions

Starter switch: LOCK

Tester connections Standard values

Engine ECU (signal check harness) AVC5(V71) – Ground EXPS(V70) – Ground ADG9(V46) – Ground

 

Do the measurements meet the standard value?

Go to step 6. Repair or replace the harness.

Perform "After-inspection work" of INFORMATION section.

Page 54

ENGINE CONTROL SYSTEM (J08E) 4–831

NOYES

V70

V71

V70

V46

SAPH16F010300663

Select

Engine

SAPH16F010300664

Inspect disconnection of the differential pressure sensor harness

1. Connect the differential pressure sensor connector.

2. Use the electrical tester to measure the resistance between the terminals of the engine ECU (signal check harness).

Measurement

conditions

Starter switch: LOCK

Tester connections Standard values

Engine ECU (signal check harness) AVC5(V71) – EXPS(V70) ADG9(V46) – EXPS(V70)

2 – 15 k

Do the measurements meet the standard value?

Go to step 7. Repair or replace the harness.

Perform "After-inspection work" of INFORMATION section.

Check the DTC detected (Engine ECU) [Hino-DX]

1. Perform engine warm-up. (engine coolant temperature: 60 C {140

2. Stop the engine and set the starter switch to the "LOCK" position.

3. Connect the vehicle to Hino-DX.

4. Set the starter switch to the "ON" position.

5. Select [Engine] and check if P1427 have been detected in [Fault

Has DTC P1427 been detected?

Replace the engine ECU. Perform "After-inspection work" of INFORMATION section.

F} or more)

Information].

Procedure completed. Perform "After-inspection work" of INFORMATION section.

Page 55

CHECKLIST: P1427

ENGINE CONTROL SYSTEM (J08E)4–832

DTC: P1427

Differential pressure sensor - out of range

(Out of range low)

Step Action Description Judgement

Failure found: Inspect the differential pres-

sure sensor connector

Check the connection of the differential pressure sensor connector (Looseness and poor contact).

Go to YES.

No failure

found: Go to

NO.

Inspect the dif-

ferential pressure sensor

1. Check the installation of the differential pressure sensor.

2. Make sure there is no dirt or damage to the differential pressure sensor.

Failure found: Go to YES.

No failure found: Go to NO.

Check

(Yes/No)

Inspection procedure

Yes No

Connect securely. repair if needed. Perform "After-

Go to step 2. inspection work" of INFORMATION section.

Clean the differential pressure sensor and install it properly. If damaged, replace the

Go to step 3. sensor. Perform "Afterinspection work" of INFORMATION section.

Inspect the differential pres-

sure sensor unit

Inspect the power supply

of the differential pressure sensor

Measure the resistance between the terminals of the differential pressure sensor. <Tester connections> Differential pressure sensor VCC – GND VOUT – GND <Standard values> 2 – 15 k

Measure the voltage between the terminals of the differential pressure sensor vehicle-side connector. <Tester connections> Differential pressure sensor vehicle-side connector VCC – GND <Standard values>

4.5 – 5.5 V

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Replace the

sensor.

Perform "AfterGo to step 4.

inspection

work" of

INFORMA-

TION section.

Go to step 5. Go to step 7.

Page 56

ENGINE CONTROL SYSTEM (J08E) 4–833

DTC: P1427

Step Action Description Judgement

Inspect for short-circuit in wire harness

of common rail pressure sensor

Inspect disconnection of the common

rail pressure sensor harness

Differential pressure sensor - out of range

(Out of range low)

Connect the signal check harness, and measure the resistance between the terminals of the engine ECU (signal check harness) and ground. <Tester connections> Engine ECU (signal check harness) AVC5(V71) – Ground EXPS(V70) – Ground AGD9(V46) – Ground <Standard values>  

Connect the differential pressure sensor connector, and measure the resistance between the terminals of the engine ECU (signal check harness). <Tester connections> Engine ECU (signal check harness) AVC5(V71) – XPS(V70) ADG9(V46) – EXPS(V70) <Standard values> 2 – 15 k

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Check

(Yes/No)

Inspection procedure

Yes No

Repair or replace the harness.

Go to step 6.

Go to step 7.

Perform "Afterinspection work" of INFORMATION section.

Repair or replace the harness. Perform "Afterinspection work" of INFORMATION section.

Check the DTC detected

(Engine ECU) [Hino-DX]

Perform engine warm-up (engine coolant temperature: 60 C {140 F} or more), and check if P1427 has been detected in [Engine].

DTC P1427 has been detected: Go to YES.

No DTC has been detected: Go to NO.

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Procedure completed. Perform "Afterinspection work" of INFORMATION section.

Page 57

ENGINE CONTROL SYSTEM (J08E)4–834

(ET4+)

(ET2+)

(EXPS)

(ADG9)

(AVC5)

LCG

KR4

(GND3)

(TEX3)

KUH

LCT

KUQ

(VOUT)

(GND)

KSK

KSL

(VCC)

KSJ

LCY

LCZ

LCY LCG

KSF LCT

KSK KUH

KSJ KUQ

KSE KR4

LCY LCG

KSF LCT

KSK KUH

KSJ KUQ

KSE KR4

(GND1)

(TEX1)

KSE

KSF

Exhaust gas temperature sensor (DOC outlet)

Exhaust gas temperature sensor (DOC inlet)

Differential pressure sensor

Engine

ECU

SAPH16F010300665

DTC: P1428

P1428: Differential pressure sensor - out of range (Out of range high)

INFORMATION

EN01H16F01030F03001106

1. Technical description

• It detects a difference between pressure at the inlet of the muffler and atmospheric pressure and monitors any failure

or malfunction of the DPR.

• Exhaust pressure cannot be correctly recognized.

• Possible DPR differential pressure sensor failure or harness +B short

2. DTC set condition

(1) Check conditions

• Starter switch ON.

• Battery voltage is in the range of 10 V to 16 V.

The conditions described above remain for 5 seconds or longer.

(2) Judgement criteria

• Output of the sensor remains greater than 4.46 V (95.1 kPa {13.8 psi}) for 3 seconds.

3. Reset condition

• Immediately after normal operation is restored.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

Page 58

ENGINE CONTROL SYSTEM (J08E) 4–835

5. Symptoms on the vehicle when the DTC is set

• –

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is stored after test drive.

8. Estimated failure factors

• Abnormal resistance of sensor

• Harness disconnection or short-circuit

• Looseness or poor contact of connector.

• Malfunction of engine ECU sensor power supply or internal circuit

Page 59

ENGINE CONTROL SYSTEM (J08E)4–836

NOYES

INSPECTION PROCEDURE: P1428

Inspect the differential pressure sensor connector

Was any failure found?

1. Check the connection of the differential pressure sensor connector (Looseness and poor contact).

Connect securely, repair if needed. Perform "After-inspection work" of INFORMATION section.

Inspect the differential pressure sensor

Was any failure found?

Clean the differential pressure sensor and install it properly. If damaged, replace the differential pressure sensor. Perform "After-inspection work" of INFORMATION section.

Go to step 2.

1. Check the installation of the differential pressure sensor.

2. Make sure there is no dirt or damage to the differential pressure sensor.

Go to step 3.

Page 60

ENGINE CONTROL SYSTEM (J08E) 4–837

NOYES

VCC

GND

VOUT

SAPH16F010300666

Inspect the differential pressure sensor power supply

1. Set the starter switch to the "ON" position.

2. Use the electrical tester to measure the voltage between the terminals of the differential pressure sensor vehicle-side connector.

Measurement

conditions

Tester connections Standard values

Differential pressure sensor vehicle-

Starter switch: ON

side connector VCC – GND VOUT – GND

Do the measurements meet the standard value?

Go to step 7. Go to step 4.

4.5 – 5.5 V

Page 61

ENGINE CONTROL SYSTEM (J08E)4–838

NOYES

VOUT

VCC

GND

VOUT

SAPH16F010300667

Inspect the differential pressure sensor unit

1. Set the starter switch to the "LOCK" position.

2. Disconnect the differential pressure sensor connector.

3. Use the electrical tester to measure the resistance between the terminals of the differential pressure sensor.

Measurement

conditions

Tester connections Standard values

Differential pres-

Starter switch: LOCK

sure sensor connector VCC – VOUT

2 – 15 k

VOUT – GND

Do the measurements meet the standard value?

Go to step 5. Replace the differential pressure sensor.

Perform "After-inspection work" of INFORMATION section.

Page 62

ENGINE CONTROL SYSTEM (J08E) 4–839

NOYES

V70

V71

V46

SAPH16F010300668

Inspect for short-circuit of the differential pressure sensor harness

1. Set the starter switch to the "LOCK" position.

2. Connect the signal check harness to the engine ECU vehicle-side harness. (Do not connect the harness to the ECU.)

3. Use the electrical tester to measure the resistance between the terminals of the engine ECU (signal check harness) and ground.

Measurement

conditions

Starter switch: LOCK

Tester connections Standard values

Engine ECU (signal check harness) AVC5(V71) – Ground EXPS(V70) – Ground AGD9(V46) – Ground

 

Do the measurements meet the standard value?

Go to step 6. Repair or replace the harness.

Perform "After-inspection work" of INFORMATION section.

Page 63

ENGINE CONTROL SYSTEM (J08E)4–840

NOYES

V70

V71

V70

V46

SAPH16F010300669

Select

Engine

SAPH16F010300670

Inspect disconnection of the differential pressure sensor harness

1. Connect the differential pressure sensor connector.

2. Use the electrical tester to measure the resistance between the terminals of the engine ECU (signal check harness).

Measurement

conditions

Starter switch: LOCK

Tester connections Standard values

Engine ECU (signal check harness) AVC5(V71) – EXPS(V70) AGD9(V46) – EXPS(V70)

2 – 15 k

Do the measurements meet the standard value?

Go to step 7. Repair or replace the harness.

Perform "After-inspection work" of INFORMATION section.

Check the DTC detected (Engine ECU) [Hino-DX]

1. Perform engine warm-up. (engine coolant temperature: 60 C {140

2. Stop the engine and set the starter switch to the "LOCK" position.

3. Connect the vehicle to Hino-DX.

4. Set the starter switch to the "ON" position.

5. Select [Engine] and check if P1428 has been detected in [Fault

Has DTC P1428 been detected?

Replace the engine ECU. Perform "After-inspection work" of INFORMATION section.

F} or more)

Information].

Procedure completed. Perform "After-inspection work" of INFORMATION section.

Page 64

CHECKLIST: P1428

ENGINE CONTROL SYSTEM (J08E) 4–841

DTC: P1428

Differential pressure sensor - out of range

(Out of range high)

Step Action Description Judgement

Failure found: Inspect the differential pres-

sure sensor connector

Check the connection of the differential pressure sensor connector (Looseness and poor contact).

Go to YES.

No failure

found: Go to

NO.

Inspect the dif-

ferential pressure sensor

1. Check the installation of the differential pressure sensor.

2. Make sure there is no dirt or damage to the differential pressure sensor.

Failure found: Go to YES.

No failure found: Go to NO.

Check

(Yes/No)

Inspection procedure

Yes No

Connect securely, repair if needed. Perform "After-

Go to step 2. inspection work" of INFORMATION section.

Clean the differential pressure sensor and install it properly. If damaged, replace the

Go to step 3. sensor. Perform "Afterinspection work" of INFORMATION section.

Inspect of the differential

pressure power supply

Inspect the differential pres-

sure sensor unit

Measure the voltage between the terminals of the differential pressure sensor vehicle-side connector. <Tester connections> Differential sensor vehicle-side connector. VCC – GND VOUT – GND <Standard values>

4.5 – 5.5 V

Disconnect the differential pressure sensor connector and measure the resistance between the terminals of the sensor. <Tester connections> DPR differential pressure sensor connector VCC – VOUT VOUT – GND <Standard values> 2 – 15 k

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Go to step 7. Go to step 4.

Replace the

sensor.

Perform "AfterGo to step 5.

inspection

work" of

INFORMA-

TION section.

Page 65

ENGINE CONTROL SYSTEM (J08E)4–842

DTC: P1428

Differential pressure sensor - out of range

(Out of range high)

Step Action Description Judgement

Connect the signal check harness to the engine ECU vehicle-side

Inspect for short-circuit of

the differential pressure sensor harness

harness. (Do not connect harness to the ECU.) and measure the resistance between the terminals of the engine ECU (signal check harness) and ground. <Tester connections> Engine ECU (signal check harness) AVC5(V71) – Ground EXPS(V70) – Ground AGD9(V46) – Ground

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

<Standard values>  

Inspect disconnection of

the differential pressure sensor harness

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Check

(Yes/No)

Inspection procedure

Yes No

Repair or replace the harness.

Go to step 6.

Perform "Afterinspection work" of INFORMATION section.

Repair or replace the harness.

Go to step 7.

Perform "Afterinspection work" of INFORMATION section.

Check the DTC detected

(Engine ECU) [Hino-DX]

1. Perform engine warm-up. (engine coolant temperature: 60 C {140 F} or more)

2. Check if P1428 have been detected in [Engine].

DTC P1428 has been detected: Go to YES.

No DTC has been detected: Go to NO.

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Procedure completed. Perform "Afterinspection work" of INFORMATION section.

Page 66

ENGINE CONTROL SYSTEM (J08E) 4–843

VNT controller

VNT actuator

ENG No.1 SUB W/H ENG No.1 W/H

LM8

(AMPU)

LMY

LMZ

(HSPW)

(MPU)

LM4

(AHOU)

LM3

(AHOV)

(HOV)

LM2 LMU

(AHOW)

(HOW)

%KQ (ENG)

%KV

(VNTC)

%KW

(VNTA)

LM5

LMW

LMV

(AHSG)

(SLGD)

(HSGD)

LM1 LMX

(AHSP)

(AMPW)

(AMPV)

LMT

(MPV)

LM0

(MPW)

KV0

(VNTV)

KVA

(VNTG)

KV8

(VNTH)

KV9

(VNTL)

L4T

(EGRV)

L4U

(EGRG)

L4S (EGRL)

L4R (EGRH)

(CANH)

K6W

K6V

(CANL)

(HOU)

LMSLM4LMS

LM3LMT

LM2LMU

%Z3LMW

LM5LMV

LM1LMX

LM8LMY

LM7LMZ

LM6LM0

LM7

LM6

%Z3

(ENG)

To CAN circuit (DPR) (BA-1)

EGR

controller

(BA-1)

To CAN circuit (DPR)

EGRL

L4S

EGRH

L4R

EGRV

L4T

EGRG

L4U

Engine

ECU

SAPH16F010300671

DTC: P1458

EN01H16F01030F03001107

P1458: Valve position control failure - DC motor out of range, functional (EGR actuator over temp warning level)

INFORMATION

1. Technical description

• EGR valve is a butterfly type.

• EGR valve opening is controlled by engine speed and amount of intake air.

• EGR valve opening is adjusted by engine ECU and CAN communication.

• EGR valve will not operate when engine coolant temperature is low (≤ 40 C {104 F}).

• DTC is issued when failure message is received from EGR actuator unit.

• EGR actuator system is malfunctioning.

2. DTC set condition

(1) DTC detection condition

• Battery voltage is in the range of 8 V to 16 V.

• There is no disconnection in harness connected to EGR valve.

• Starter switch ON. (Not related to engine speed)

(2) Judgement criteria

• Actual actuator temperature is 165 C {329 F}, and this condition continues for 0.6 sec.

3. Reset condition

• Normal operation is restored and accelerator is not being operated.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

• Engine output is restricted.

Page 67

ENGINE CONTROL SYSTEM (J08E)4–844

5. Symptoms on the vehicle when the DTC is set

• Engine output is insufficient.

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is detected after test drive.

8. Estimated failure factors

• Abnormal engine room interior temperature

• Abnormal heat rise in motor or element inside EGR actuator.

• Soot adhesion and damage due to hard foreign substances on EGR valve sealing face and gas passageway.

(Hardened carbon may peel off from EGR cooler upstream of EGR valve.)

Page 68

ENGINE CONTROL SYSTEM (J08E) 4–845

NOYES

SAPH16F010300672

INSPECTION PROCEDURE: P1458

Check the DTC detected (Engine ECU) [Hino-DX]

1. Set the starter switch to the "LOCK" position.

2. Connect the vehicle to Hino-DX.

Select

Engine

Has a DTC other than P1458 been detected?

Go to the diagnostic procedure of a related DTC.

Inspect the EGR valve

3. Set the starter switch to the "ON" position.

4. Select [Engine] and check if any DTC other than P1458 have been detected in [Fault Information].

Go to step 2.

1. Check the valve sealing face and gas passageway for soot accumulation and damage due to foreign substances.

2. Check if there is soot obstructing the exhaust gas passageway inlet or outlet.

Was any failure found?

Remove foreign substances and clean the EGR valve. Replace the EGR valve if it is damaged. Perform "After-inspection work" of INFORMATION section.

Go to step 3.

Page 69

NOYES

Inspect the EGR valve connector

EGRV

EGRG

SAPH16F010300673

Was any failure found?

ENGINE CONTROL SYSTEM (J08E)4–846

1. Check the connection of the EGR valve connector (Looseness and poor contact).

Connect securely, repair if needed. Perform "After-inspection work" of INFORMATION section.

Inspect the EGR power supply

Do the measurements meet the standard value?

Go to step 4.

1. Set the starter switch to the "LOCK" position.

2. Disconnect the EGR valve connector.

3. Set the starter switch to the "ON" position.

4. Use the electrical tester to measure the voltage between the terminals of the EGR valve vehicle-side connector.

Measurement

conditions

Starter switch: ON

Tester connections Standard values

EGR valve vehicleside connector EGRV – EGRG

8 – 16 V

Go to step 5. Check the wire harness (actuator power sup-

ply and ground) and battery voltage. Repair or replace parts as needed. Perform "After-inspection work" of INFORMATION section.

Page 70

ENGINE CONTROL SYSTEM (J08E) 4–847

! CAUTION

NOYES

SAPH16F010300674

Inspect the response delay of the EGR valve [Hino-DX]

1. Select [Check functions] and then [EGR check] from the menu,

(1)

then inspect the response delay at the Target EGR position and Actual EGR position.

(2)

(4)

(3)

(5)

• Perform the inspection while the engine is stopped to avoid

damages.

<Inspection procedure> (1) Select [Check functions]. (2) Select [EGR check]. (3) Click [Check start]. (4) Select [EGR opening UP]:  Inspect the response delay at each step of the Target EGR position and Actual EGR position from 0 to 100 %. (5) Select [EGR opening DOWN]:  Inspect the response delay at each step of the Target EGR position and Actual EGR position from 100 to 0 %.

HINT

• The EGR opening position changes of around 10 % per step

between 0 – 100 %.

Standard values

From the Target EGR position to the Actual EGR position, the response delay should be within 5 seconds.

Do the measurements meet the standard value?

Replace the engine ECU. Perform "After-inspection work" of INFORMATION section.

Replace the EGR valve. Perform "After-inspection work" of INFORMATION section.

Page 71

CHECKLIST: P1458

DTC: P1458

ENGINE CONTROL SYSTEM (J08E)4–848

Valve position control failure - DC motor out of

range, functional

(EGR actuator over temp warning level)

Inspection procedure

Step Action Description Judgement

DTC other than P1458

Check the DTC detected

(Engine ECU) [Hino-DX]

Check if any DTC other than P1458 has been detected in [Engine].

has been detected: Go to YES.

No DTC has been detected: Go to NO.

1. Check the valve sealing face Failure found: Go to YES.

No failure found: Go to NO.

Inspect the EGR valve

and gas passageway for soot accumulation and damage due to foreign substances.

2. Check if there is soot

obstructing the exhaust gas passageway inlet or outlet.

Check

(Yes/No)

Yes No

Go to diagnosis procedure of a related DTC.

Remove foreign substances and clean the valve. Replace the EGR valve if it is damaged. Perform "Afterinspection work" of INFORMATION section.

Go to step 2.

Go to step 3.

Inspect the

EGR valve connector

Inspect the

EGR power supply

Check the connection of the EGR valve connector (Looseness and poor contact).

Disconnect the EGR valve connector, and measure the voltage between the terminals of the EGR valve vehicle-side connector. <Tester connections> EGR valve vehicle-side connector EGRV – EGRG <Standard values> 8 – 16 V

Failure found: Go to YES.

No failure found: Go to NO.

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Connect securely. repair if needed. Perform "Afterinspection work" of INFORMATION section.

Go to step 5.

Go to step 4.

Check the wire harness (actuator power supply and ground) and battery voltage. Repair or replace parts as needed. Perform "Afterinspection work" of INFORMATION section.

Page 72

!CAUTION

DTC: P1458

ENGINE CONTROL SYSTEM (J08E) 4–849

Valve position control failure - DC motor out of

range, functional

(EGR actuator over temp warning level)

Inspection procedure

Step Action Description Judgement

Select [Check functions] and then [EGR check] from the menu, then inspect the response delay at the Target EGR position and Actual EGR position.

Perform the inspection while the engine is stopped to avoid damages.

<Inspection procedure> (1) Select [Check functions].

Inspect the response

delay of the EGR valve [Hino-DX]

(2) Select [EGR check]. (3) Click [Check start]. (4) Select [EGR opening UP]:

• Inspect the response delay

at each step of the Target EGR position and Actual EGR position from 0 to 100 %.

(5) Select [EGR opening DOWN]:

• Inspect the response delay

at each step of the Target

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go

to NO. EGR position and Actual EGR position from 100 to 0 %.

HINT The EGR opening position changes of around 10 % per step between 0 – 100 %.

Check

(Yes/No)

Yes No

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Replace the EGR valve. Perform "Afterinspection work" of INFORMATION section.

<Standard values> From the Target EGR position to the Actual EGR position, the response delay should be within 5 seconds.

Page 73

ENGINE CONTROL SYSTEM (J08E)4–850

VNT

controller

VNT actuator

ENG No.1 SUB W/H ENG No.1 W/H

LM8

(AMPU)

LMY

LMZ

(HSPW)

(MPU)

LM4

(AHOU)

LM3

(AHOV)

(HOV)

LM2 LMU

(AHOW)

(HOW)

%KQ (ENG)

%KV

(VNTC)

%KW

(VNTA)

LM5

LMW

LMV

(AHSG)

(SLGD)

(HSGD)

LM1 LMX

(AHSP)

(AMPW)

(AMPV)

LMT

(MPV)

LM0

(MPW)

KV0

(VNTV)

KVA

(VNTG)

KV8

(VNTH)

KV9

(VNTL)

L4T

(EGRV)

L4U

(EGRG)

L4S (EGRL)

L4R (EGRH)

(CANH)

K6W

K6V

(CANL)

(HOU)

LMSLM4LMS

LM3LMT

LM2LMU

%Z3LMW

LM5LMV

LM1LMX

LM8LMY

LM7LMZ

LM6LM0

LM7

LM6

%Z3

(ENG)

To CAN circuit (DPR) (BA-1)

EGR

controller

(BA-1)

To CAN circuit (DPR)

EGRL

L4S

EGRH

L4R

EGRV

L4T

EGRG

L4U

Engine

ECU

SAPH16F010300675

DTC: P1459

P1459: Controller high temperature (EGR actuator over temp severe level)

INFORMATION

EN01H16F01030F03001108

1. Technical description

• EGR valve is a butterfly type.

• EGR valve opening is controlled by engine speed and amount of intake air.

• EGR valve opening is adjusted by engine ECU and CAN communication.

• EGR valve will not operate when engine coolant temperature is low (≤ 40 C {104 F}).

• DTC is issued when failure message is received from EGR actuator unit.

• EGR actuator system is malfunctioning.

2. DTC set condition

(1) DTC detection condition

• Battery voltage is in the range of 8 V to 16 V.

• There is no disconnection in harness connected to EGR valve.

• Starter switch ON. (Not related to engine speed)

(2) Judgement criteria

• Actual actuator temperature is 150 C {302 F} or greater and under 165 C {329 F}, and this condition continues

for 0.6 sec.

3. Reset condition

• Normal operation is restored and accelerator is not being operated.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

• Engine output is restricted.

Page 74

ENGINE CONTROL SYSTEM (J08E) 4–851

5. Symptoms on the vehicle when the DTC is set

• Engine output is insufficient.

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is detected after test drive.

8. Estimated failure factors

• Abnormal engine room interior temperature.

• Abnormal heat rise in motor or element inside EGR actuator.

• Soot adhesion and damage due to hard foreign substances on EGR valve sealing face and gas passageway (Hard-

ened carbon may peel off from EGR cooler upstream of EGR valve.)

Page 75

ENGINE CONTROL SYSTEM (J08E)4–852

NOYES

SAPH16F010300676

INSPECTION PROCEDURE: P1459

Check the DTC detected (Engine ECU) [Hino-DX]

1. Set the starter switch to the "LOCK" position.

2. Connect the vehicle to Hino-DX.

Select

Engine

Has a DTC other than P1459 been detected?

Go to the diagnostic procedure of a related DTC.

Inspect the EGR valve

3. Set the starter switch to the "ON" position.

4. Select [Engine] and check if any DTC other than P1459 has been detected in [Fault Information].

Go to step 2.

1. Check the valve sealing face and gas passageway for soot accumulation and damage due to foreign substances.

2. Check if there is soot obstructing the exhaust gas passageway inlet or outlet.

Was any failure found?

Remove foreign substances and clean the EGR valve. Replace the EGR valve if it is damaged. Perform "After-inspection work" of INFORMATION section.

Go to step 3.

Page 76

NOYES

Inspect the EGR valve connector

EGRV

EGRG

SAPH16F010300677

Was any failure found?

ENGINE CONTROL SYSTEM (J08E) 4–853

1. Check the connection of the EGR valve connector (Looseness and poor contact).

Connect securely, repair if needed. Perform "After-inspection work" of INFORMATION section.

Check the EGR valve power supply

Do the measurements meet the standard value?

Go to step 4.

1. Set the starter switch to the "LOCK" position.

2. Disconnect the EGR valve connector.

3. Set the starter switch to the "ON" position.

4. Use the electrical tester to measure the voltage between the terminals of the EGR valve vehicle-side connector.

Measurement

conditions

Starter switch: ON

Tester connections Standard values

EGR valve vehicleside connector EGRV – EGRG

8 – 16 V

Go to step 5. Check the wire harness (actuator power sup-

ply and ground) and battery voltage. Repair or replace parts as needed. Perform "After-inspection work" of INFORMATION section.

Page 77

ENGINE CONTROL SYSTEM (J08E)4–854

!CAUTION

NOYES

(4)

(5)

(3)

(1)

(2)

SAPH16F010300678

Inspect the response delay of the EGR valve [Hino-DX]

1. Select [Check functions] and then [EGR check] from the menu, then inspect the response delay at the Target EGR position and Actual EGR position.

• Perform the inspection while the engine is stopped to avoid

damages.

HINT

• The EGR opening position changes of around 10 % per step

between 0 – 100 %.

From the Target EGR position to the Actual EGR position, the response delay should be within 5 seconds.

Do the measurements meet the standard value?

Replace the engine ECU. Perform "After-inspection work" of INFORMATION section.

Standard values

Replace the EGR valve. Perform "After-inspection work" of INFORMATION section.

Page 78

CHECKLIST: P1459

ENGINE CONTROL SYSTEM (J08E) 4–855

DTC: P1459

Controller high temperature

(EGR actuator over temp severe level)

Step Action Description Judgement

DTC other than P1459

Check the DTC detected

(Engine ECU) [Hino-DX]

Check if any DTC other than P1459 has been detected in [Engine].

has been detected: Go to YES.

No DTC has been detected: Go to NO.

1. Check the valve sealing face Failure found: Go to YES.

No failure found: Go to NO.

Inspect the EGR valve

and gas passageway for soot accumulation and damage due to foreign substances.

2. Check if there is soot

obstructing the exhaust gas passageway inlet or outlet.

Check

(Yes/No)

Inspection procedure

Yes No

Go to diagnosis procedure of a related

Go to step 2.

DTC.

Remove foreign substances and clean the valve. Replace the EGR valve if it

Go to step 3. is damaged. Perform "Afterinspection work" of INFORMATION section.

Inspect the

EGR valve connector

Check the

EGR valve power supply

Check the connection of the EGR valve connector (Looseness and poor contact).

Failure found: Go to YES.

No failure found: Go to NO.

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Connect securely. repair if needed. Perform "Afterinspection work" of INFORMATION section.

Go to step 5.

Go to step 4.

Check the wire

harness (actu-

ator power

supply and

ground) and

battery volt-

age. Repair or

replace parts

as needed.

Perform "After-

inspection

work" of

INFORMA-

TION section.

Page 79

ENGINE CONTROL SYSTEM (J08E)4–856

!CAUTION

DTC: P1459

Controller high temperature

(EGR actuator over temp severe level)

Step Action Description Judgement

Select [Check functions] and then [EGR check] from the menu, then inspect the response delay at the Target EGR position and Actual EGR position.

Perform the inspection while the engine is stopped to avoid damages.

<Inspection procedure> (1) Select [Check functions].

Inspect the response

delay of the EGR valve [Hino-DX]

(2) Select [EGR check]. (3) Click [Check start]. (4) Select [EGR opening UP]:

• Inspect the response delay

at each step of the Target EGR position and Actual EGR position from 0 to 100 %.

(5) Select [EGR opening DOWN]:

• Inspect the response delay

at each step of the Target

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go

to NO. EGR position and Actual EGR position from 100 to 0 %.

HINT The EGR opening position changes of around 10 % per step between 0 – 100 %.

Check

(Yes/No)

Inspection procedure

Yes No

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Replace the EGR valve. Perform "Afterinspection work" of INFORMATION section.

<Standard values> From the Target EGR position to the Actual EGR position, the response delay should be within 5 seconds.

Page 80

ENGINE CONTROL SYSTEM (J08E) 4–857

VNT controller

VNT actuator

ENG No.1 SUB W/H ENG No.1 W/H

LM8

(AMPU)

LMY

LMZ

(HSPW)

(MPU)

LM4

(AHOU)

LM3

(AHOV)

(HOV)

LM2 LMU

(AHOW)

(HOW)

%KQ (ENG)

%KV

(VNTC)

%KW

(VNTA)

LM5

LMW

LMV

(AHSG)

(SLGD)

(HSGD)

LM1 LMX

(AHSP)

(AMPW)

(AMPV)

LMT

(MPV)

LM0

(MPW)

KV0

(VNTV)

KVA

(VNTG)

KV8

(VNTH)

KV9

(VNTL)

L4T

(EGRV)

L4U

(EGRG)

L4S (EGRL)

L4R (EGRH)

(CANH)

K6W

K6V

(CANL)

(HOU)

LMSLM4LMS

LM3LMT

LM2LMU

%Z3LMW

LM5LMV

LM1LMX

LM8LMY

LM7LMZ

LM6LM0

LM7

LM6

%Z3

(ENG)

To CAN circuit (DPR) (BA-1)

EGR

controller

(BA-1)

To CAN circuit (DPR)

EGRL

L4S

EGRH

L4R

EGRV

L4T

EGRG

L4U

Engine

ECU

SAPH16F010300679

DTC: P14B0

EN01H16F01030F03001109

P14B0: Controller store data error (EGR actuator abnormal information reading)

INFORMATION

1. Technical description

• EGR valve is a butterfly type.

• EGR valve opening is controlled by engine speed and amount of intake air.

• EGR valve opening is adjusted by engine ECU and CAN communication.

• EGR valve will not operate when engine coolant temperature is low (≤ 40 C {104 F})

• DTC is issued when failure message is received from EGR actuator unit.

• EGR actuator system is malfunctioning.

2. DTC set condition

(1) DTC detection condition

• Battery voltage is in the range of 8 V to 16 V.

• There is no disconnection in harness connected to EGR valve.

• Starter switch ON. (Not related to engine speed.)

(2) Judgement criteria

• When data stored in actuator cannot be correctly read.

3. Reset condition

• When power is supplied again and judgment criteria are resolved.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

• Engine output is restricted.

Page 81

ENGINE CONTROL SYSTEM (J08E)4–858

5. Symptoms on the vehicle when the DTC is set

• Engine output is insufficient.

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is detected after test drive.

8. Estimated failure factors

• Damaged element inside EGR valve actuator

Page 82

ENGINE CONTROL SYSTEM (J08E) 4–859

NOYES

Select

Engine

SAPH16F010300680

INSPECTION PROCEDURE: P14B0

Check the DTC detected 1 (Engine ECU) [Hino-DX]

Has a DTC other than P14B0 been detected?

1. Set the starter switch to the "LOCK" position.

2. Connect the vehicle to Hino-DX.

3. Set the starter switch to the "ON" position.

4. Select [Engine] and check if any DTC other than P14B0 have been detected in [Fault Information].

Go to the diagnostic procedure of a related DTC.

Inspect the EGR valve connector

Was any failure found?

Connect securely, repair if needed. Perform "After-inspection work" of INFORMATION section.

Go to step 2.

1. Check the connection of the EGR valve connector (Looseness and poor contact).

Go to step 3.

Page 83

NOYES

Inspect the EGR valve power supply

EGRV

EGRG

SAPH16F010300681

SAPH16F010300682

ENGINE CONTROL SYSTEM (J08E)4–860

1. Set the starter switch to the "LOCK" position.

2. Disconnect the EGR valve connector.

3. Set the starter switch to the "ON" position.

4. Use the electrical tester to measure the voltage between the terminals of the EGR valve vehicle-side connector.

Measurement

conditions

Starter switch: ON

Tester connections Standard values

EGR valve vehicleside connector EGRV – EGRG

8 – 16 V

Do the measurements meet the standard value?

Replace the EGR valve, go to step 4. Check the wire harness (actuator power sup-

ply and ground) and battery voltage. Repair or replace parts as needed. Perform "After-inspection work" of INFORMATION section.

Check the DTC detected 2 (Engine ECU) [Hino-DX]

1. Set the starter switch to the "ON" position.

2. Select [Engine] and check if P14B0 have been detected in [Fault

Select

Engine

Has DTC P14B0 been detected?

Replace the engine ECU. Perform "After-inspection work" of INFORMATION section.

Information].

Procedure completed. Perform "After-inspection work" of INFORMATION section.

Page 84

CHECKLIST: P14B0

ENGINE CONTROL SYSTEM (J08E) 4–861

DTC: P14B0

Step Action Description Judgement

Check the DTC detected

1 (Engine ECU) [HinoDX]

Inspect the

EGR valve connector

Inspect the

EGR valve power supply

(EGR actuator abnormal information reading)

Check if any DTC other than P14B0 has been detected in [Engine].

Check the connection of the EGR valve connector (Looseness and poor contact).

Disconnect the EGR valve connector and measure the voltage between the terminals of the EGR valve vehicle-side connector. <Tester connections> EGR valve vehicle-side connector EGRV – EGRG <Standard values> 8 – 16 V

Controller store data error

DTC other than P14B0 has been detected: Go to YES.

No DTC has been detected. Go to NO.

Failure found: Go to YES.

No failure found: Go to NO.

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

Check

(Yes/No)

Inspection procedure

Yes No

Go to the diagnostic procedure of a related DTC.

Connect securely, repair if needed. Perform "Afterinspection work" of INFORMATION section.

Replace the EGR valve, go to step 4.

Go to step 2.

Go to step 3.

Check the wire harness (actuator power supply and ground) and battery voltage. Repair or replace parts as needed. Perform "Afterinspection work" of INFORMATION section.

Check the DTC detected

2 (Engine ECU) [HinoDX]

Check if P14B0 has been detected in [Engine].

DTC P14B0 has been detected: Go to YES.

No DTC has been detected: Go to NO.

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Procedure completed. Perform "Afterinspection work" of INFORMATION section.

Page 85

ENGINE CONTROL SYSTEM (J08E)4–862

VNT controller

VNT actuator

ENG No.1 SUB W/H ENG No.1 W/H

LM8

(AMPU)

LMY

LMZ

(HSPW)

(MPU)

LM4

(AHOU)

LM3

(AHOV)

(HOV)

LM2 LMU

(AHOW)

(HOW)

%KQ (ENG)

%KV

(VNTC)

%KW

(VNTA)

LM5

LMW

LMV

(AHSG)

(SLGD)

(HSGD)

LM1 LMX

(AHSP)

(AMPW)

(AMPV)

LMT

(MPV)

LM0

(MPW)

KV0

(VNTV)

KVA

(VNTG)

KV8

(VNTH)

KV9

(VNTL)

L4T

(EGRV)

L4U

(EGRG)

L4S (EGRL)

L4R (EGRH)

(CANH)

K6W

K6V

(CANL)

(HOU)

LMSLM4LMS

LM3LMT

LM2LMU

%Z3LMW

LM5LMV

LM1LMX

LM8LMY

LM7LMZ

LM6LM0

LM7

LM6

%Z3

(ENG)

To CAN circuit (DPR) (BA-1)

EGR

controller

(BA-1)

To CAN circuit (DPR)

EGRL

L4S

EGRH

L4R

EGRV

L4T

EGRG

L4U

Engine

ECU

SAPH16F010300683

DTC: P14B2

EN01H16F01030F03001110

P14B2: EGR controller power supply open circuit (EGR actuator power supply open circuit)

INFORMATION

1. Technical description

• EGR valve is a butterfly type.

• EGR valve opening is controlled by engine speed and amount of intake air.

• EGR valve opening is adjusted by engine ECU and CAN communication.

• EGR valve will not operate when engine coolant temperature is low (≤ 40 C {104 F})

• DTC is issued when failure message is received from EGR actuator unit.

• EGR actuator system is malfunctioning.

2. DTC set condition

(1) DTC detection condition

• Battery voltage is in the range of 8 V to 16 V.

• There is no disconnection in harness connected to EGR valve.

• Starter switch ON. (Not related to engine speed.)

(2) Judgement criteria

• When difference in power supply voltage input with 2 systems is at least 1 V, and this condition continues for 1

second.

3. Reset condition

• Normal operation is restored and accelerator is not being operated.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

Page 86

ENGINE CONTROL SYSTEM (J08E) 4–863

•

Engine output is restricted.

5. Symptoms on the vehicle when the DTC is set

• Engine output is insufficient.

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is detected after test drive.

8. Estimated failure factors

• Damaged substrate or element inside EGR valve actuator

• Abnormal battery voltage

• Faulty contact in EGR actuator connector

• Disconnection or short-circuit in sensor harness

Page 87

ENGINE CONTROL SYSTEM (J08E)4–864

NOYES

SAPH16F010300684

INSPECTION PROCEDURE: P14B2

Check the DTC detected 1 (Engine ECU) [Hino-DX]

1. Set the starter switch to the "LOCK" position.

2. Connect the vehicle to Hino-DX.

Select

Engine

Has a DTC other than P14B2 been detected?

Go to the diagnostic procedure of a related DTC.

Inspect the EGR valve connector

3. Set the starter switch to the "ON" position.

4. Select [Engine] and check if any DTC other than P14B2 has been detected in [Fault Information].

Go to step 2.

1. Check the connection of the EGR valve connector (Looseness and poor contact).

Was any failure found?

Connect securely, repair if needed. Perform "After-inspection work" of INFORMATION section.

Go to step 3.

Page 88

NOYES

Inspect the EGR valve power supply

EGRV

EGRG

SAPH16F010300685

Select

Engine

SAPH16F010300686

ENGINE CONTROL SYSTEM (J08E) 4–865

1. Set the starter switch to the "LOCK" position.

2. Disconnect the EGR valve connector.

3. Set the starter switch to the "ON" position.

4. Use the electrical tester to measure the voltage between the terminals of the EGR valve vehicle-side connector.

Measurement

conditions

Starter switch: ON

Tester connections Standard values

EGR valve vehicleside connector EGRV – EGRG

8 – 16 V

Do the measurements meet the standard value?

Replace the EGR valve, go to step 4. Check the wire harness (actuator power sup-

ply and ground) and battery voltage. Repair or replace parts as needed. Perform "After-inspection work" of INFORMATION section.

Check the DTC detected 2 (Engine ECU) [Hino-DX]

1. Set the starter switch to the "ON" position.

2. Select [Engine] and check if P14B2 has been detected in [Fault Information].

Has DTC P14B2 been detected?

Replace the engine ECU. Perform "After-inspection work" of INFORMATION section.

Procedure completed. Perform "After-inspection work" of INFORMATION section.

Page 89

CHECKLIST: P14B2

ENGINE CONTROL SYSTEM (J08E)4–866

DTC: P14B2

Step Action Description Judgement

Check the DTC detected

1 (Engine ECU) [HinoDX]

Inspect the

EGR valve connector

Inspect the

EGR valve power supply

EGR controller power supply open circuit (EGR actuator power supply open circuit)

DTC other than P14B2

has been Check if any DTC other than P14B2 has been detected in [Engine].

Check the connection of the EGR valve connector (Looseness and poor contact).

detected: Go

to YES.

No DTC has

been detected.

Go to NO.

Failure found:

Go to YES.

No failure

found: Go to

NO.

The measure-

ments meet

the standard

value: Go to

YES.

The measure-

ments do not

meet the stan-

dard value: Go

to NO.

Check

(Yes/No)

Inspection procedure

Yes No

Go to the diagnostic procedure of a related DTC.

Connect securely, repair if needed. Perform "Afterinspection work" of INFORMATION section.

Replace the EGR valve, go to step 4.

Go to step 2.

Go to step 3.

Check the wire harness (actuator power supply and ground) and battery voltage. Repair or replace parts as needed. Perform "Afterinspection work" of INFORMATION section.

Check the DTC detected

2 (Engine ECU) [HinoDX]

Check if P14B2 has been detected in [Engine].

DTC P14B2

has been

detected: Go

to YES.

No DTC has

been detected:

Go to NO.

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Procedure completed. Perform "Afterinspection work" of INFORMATION section.

Page 90

ENGINE CONTROL SYSTEM (J08E) 4–867

VNT controller

VNT actuator

ENG No.1 SUB W/H ENG No.1 W/H

LM8

(AMPU)

LMY

LMZ

(HSPW)

(MPU)

LM4

(AHOU)

LM3

(AHOV)

(HOV)

LM2 LMU

(AHOW)

(HOW)

%KQ (ENG)

%KV

(VNTC)

%KW

(VNTA)

LM5

LMW

LMV

(AHSG)

(SLGD)

(HSGD)

LM1 LMX

(AHSP)

(AMPW)

(AMPV)

LMT

(MPV)

LM0

(MPW)

KV0

(VNTV)

KVA

(VNTG)

KV8

(VNTH)

KV9

(VNTL)

L4T

(EGRV)

L4U

(EGRG)

L4S (EGRL)

L4R (EGRH)

(CANH)

K6W

K6V

(CANL)

(HOU)

LMSLM4LMS

LM3LMT

LM2LMU

%Z3LMW

LM5LMV

LM1LMX

LM8LMY

LM7LMZ

LM6LM0

LM7

LM6

%Z3

(ENG)

To CAN circuit (DPR) (BA-1)

EGR

controller

(BA-1)

To CAN circuit (DPR)

EGRL

L4S

EGRH

L4R

EGRV

L4T

EGRG

L4U

Engine

ECU

SAPH16F010300687

DTC: P14B3 and P14B4

P14B3: Battery voltage (high) (EGR actuator power supply too high)

INFORMATION

EN01H16F01030F03001111

1. Technical description

• EGR valve is a butterfly type.

• EGR valve opening is controlled by engine speed and amount of intake air.

• EGR valve opening is adjusted by engine ECU and CAN communication.

• EGR valve will not operate when engine coolant temperature is low (≤ 40 C {104 F})

• Wiping operation from "fully open  fully closed" is conducted as an EGR valve surface cleaning operation when the

starter switch is LOCK.

• Failure message is received from EGR controller.

2. DTC set condition

(1) DTC detection condition

• Battery voltage is in the range of 8 V to 16 V.

• There is no disconnection in harness connected to EGR valve.

• Starter switch ON. (Not related to engine speed.)

(2) Judgement criteria

• When power supply voltage is 7 V or less, and this condition continues for 1 second.

3. Reset condition

• After restoration to normal condition.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

• Engine output is restricted.

Page 91

ENGINE CONTROL SYSTEM (J08E)4–868

5. Symptoms on the vehicle when the DTC is set

• Engine output is insufficient.

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is detected after test drive.

8. Estimated failure factors

• Abnormal battery voltage.

• Faulty contact in EGR actuator connector.

• Harness disconnection or short-circuit.

Page 92

ENGINE CONTROL SYSTEM (J08E) 4–869

VNT controller

VNT actuator

ENG No.1 SUB W/H ENG No.1 W/H

LM8

(AMPU)

LMY

LMZ

(HSPW)

(MPU)

LM4

(AHOU)

LM3

(AHOV)

(HOV)

LM2 LMU

(AHOW)

(HOW)

%KQ (ENG)

%KV

(VNTC)

%KW

(VNTA)

LM5

LMW

LMV

(AHSG)

(SLGD)

(HSGD)

LM1 LMX

(AHSP)

(AMPW)

(AMPV)

LMT

(MPV)

LM0

(MPW)

KV0

(VNTV)

KVA

(VNTG)

KV8

(VNTH)

KV9

(VNTL)

L4T

(EGRV)

L4U

(EGRG)

L4S (EGRL)

L4R (EGRH)

(CANH)

K6W

K6V

(CANL)

(HOU)

LMSLM4LMS

LM3LMT

LM2LMU

%Z3LMW

LM5LMV

LM1LMX

LM8LMY

LM7LMZ

LM6LM0

LM7

LM6

%Z3

(ENG)

To CAN circuit (DPR) (BA-1)

EGR

controller

(BA-1)

To CAN circuit (DPR)

EGRL

L4S

EGRH

L4R

EGRV

L4T

EGRG

L4U

Engine

ECU

SAPH16F010300688

P14B4: Battery voltage (low) (EGR actuator power supply too low)

INFORMATION

1. Technical description

• EGR valve is a butterfly type.

• EGR valve opening is controlled by engine speed and amount of intake air.

• EGR valve opening is adjusted by engine ECU and CAN communication.

• EGR valve will not operate when engine coolant temperature is low (≤ 40 C {104 F})

• Wiping operation from "fully open  fully closed" is conducted as an EGR valve surface cleaning operation when the

starter switch is LOCK.

• Failure message is received from EGR controller.

2. DTC set condition

(1) DTC detection condition

• Battery voltage is in the range of 8 V to 16 V.

• There is no disconnection in harness connected to EGR valve.

• Starter switch ON. (Not related to engine speed.)

(2) Judgement criteria

• When power supply voltage is 7 V or less, and this condition continues for 60 ms.

3. Reset condition

• Immediately after normal operation is restored.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

• Engine output is restricted.

Page 93

ENGINE CONTROL SYSTEM (J08E)4–870

5. Symptoms on the vehicle when the DTC is set

• Engine output is insufficient.

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is detected after test drive.

8. Estimated failure factors

• Abnormal battery voltage.

• Faulty contact in EGR actuator connector.

• Disconnection or short-circuit in sensor harness.

Page 94

ENGINE CONTROL SYSTEM (J08E) 4–871

NOYES

Select

Engine

SAPH16F010300689

INSPECTION PROCEDURE: P14B3 and P14B4

Check the DTC detected 1 (Engine ECU) [Hino-DX]

1. Set the starter switch to the "LOCK" position.

2. Connect the vehicle to Hino-DX.

3. Set the starter switch to the "ON" position.

4. Select [Engine] and check if any DTC other than DTC (P14B3 or P14B4) has been detected in [Fault Information].

Has a DTC other than DTC (P14B3 or P14B4) been detected?

Go to diagnosis procedure of a related DTC. Go to step 2.

Inspect the EGR valve connector

1. Check the connection of the EGR valve connector (Looseness and poor contact).

Was any failure found?

Connect securely, repair if needed. Perform "After-inspection work" of INFORMATION section.

Go to step 3.

Page 95

NOYES

Inspect the EGR valve power supply

EGRV

EGRG

SAPH16F010300690

SAPH16F010300691

ENGINE CONTROL SYSTEM (J08E)4–872

1. Set the starter switch to the "LOCK" position.

2. Disconnect the EGR valve connector.

3. Set the starter switch to the "ON" position.

4. Use the electrical tester to measure the voltage between the terminals of the EGR valve vehicle-side connector.

Measurement

conditions

Starter switch: ON

Tester connections Standard values

EGR valve vehicleside connector EGRV – EGRG

8 – 16 V

Do the measurements meet the standard value?

Replace the EGR valve, and go to step 4. Check the wire harness (actuator power sup-

ply and ground). Repair or replace parts as needed. Perform "After-inspection work" of INFORMATION section.

Check the DTC detected 2 (Engine ECU) [Hino-DX]

1. Set the starter switch to the "ON" position.

2. Select [Engine] and check if the DTC (P14B3 or P14B4) has been

Select

Engine

Has DTC (P14B3 or P14B4) been detected?

Replace the ECU. Perform "After-inspection work" of INFORMATION section.

detected in [Fault Information].

Procedure completed. Perform "After-inspection work" of INFORMATION section.

Page 96

CHECKLIST: P14B3 and P14B4

ENGINE CONTROL SYSTEM (J08E) 4–873

DTC: P14B3

DTC: P14B4

Step Action Description Judgement

Check the DTC detected

1 (Engine ECU) [HinoDX]

Inspect the

EGR valve connector

(EGR actuator power supply too high)

(EGR actuator power supply too low)

Check if any DTC other than DTC (P14B3 or P14B4) has been detected in [Engine].

Check the connection of the EGR valve connector (Looseness and poor contact).

Battery voltage (high)

Battery voltage (low)

DTC other than DTC (P14B3 or P14B4) has been detected: Go to YES.

No DTC has been detected. Go to NO.

Failure found: Go to YES.

No failure found: Go to NO.

Check

(Yes/No)

Inspection procedure

Yes No

Go to diagnosis procedure of a related DTC.

Connect securely, repair if needed. Perform "Afterinspection work" of INFORMATION section.

Go to step 2.

Go to step 3.

Inspect the

EGR valve power supply

Check the DTC detected

2 (Engine ECU) [HinoDX]

Check if the DTC (P14B3 or P14B4) has been detected in [Engine].

The measurements meet the standard value: Go to YES.

The measurements do not meet the standard value: Go to NO.

DTC (P14B3 or P14B4) has been detected: Go to YES.

No DTC has been detected: Go to NO.

Replace the EGR valve, and go to step

Replace the engine ECU. Perform "Afterinspection work" of INFORMATION section.

Check the wire harness (actuator power supply and ground). Repair or replace parts as needed. Perform "Afterinspection work" of INFORMATION section.

Procedure completed. Perform "Afterinspection work" of INFORMATION section.

Page 97

ENGINE CONTROL SYSTEM (J08E)4–874

VNT controller

VNT actuator

ENG No.1 SUB W/H ENG No.1 W/H

LM8

(AMPU)

LMY

LMZ

(HSPW)

(MPU)

LM4

(AHOU)

LM3

(AHOV)

(HOV)

LM2 LMU

(AHOW)

(HOW)

%KQ (ENG)

%KV

(VNTC)

%KW

(VNTA)

LM5

LMW

LMV

(AHSG)

(SLGD)

(HSGD)

LM1 LMX

(AHSP)

(AMPW)

(AMPV)

LMT

(MPV)

LM0

(MPW)

KV0

(VNTV)

KVA

(VNTG)

KV8

(VNTH)

KV9

(VNTL)

L4T

(EGRV)

L4U

(EGRG)

L4S (EGRL)

L4R (EGRH)

(CANH)

K6W

K6V

(CANL)

(HOU)

LMSLM4LMS

LM3LMT

LM2LMU

%Z3LMW

LM5LMV

LM1LMX

LM8LMY

LM7LMZ

LM6LM0

LM7

LM6

%Z3

(ENG)

To CAN circuit (DPR) (BA-1)

EGR

controller

(BA-1)

To CAN circuit (DPR)

EGRL

L4S

EGRH

L4R

EGRV

L4T

EGRG

L4U

Engine

ECU

SAPH16F010300692

DTC: P14B7 and P14B8

EN01H16F01030F03001112

P14B7: EGR valve controller temperature sensor 1 (Signal too low) (EGR actuator temp. sensor 1 signal too low)

INFORMATION

1. Technical description

• EGR valve is a butterfly type.

• EGR valve opening is controlled by engine speed and amount of intake air.

• EGR valve opening is adjusted by engine ECU and CAN communication.

• EGR valve will not operate when engine coolant temperature is low (≤ 40 C {104 F})

• DTC is issued when failure message is received from EGR actuator unit.

• EGR actuator system is malfunctioning.

2. DTC set condition

(1) DTC detection condition

• Battery voltage is in the range of 8 V to 16 V.

• There is no disconnection in harness connected to EGR valve.

• Starter switch ON. (Not related to engine speed.)

(2) Judgement criteria

• When temperature of temperature sensor 1 (FET side) inside actuator is -50 C {-58 F} or less, and this condi-

tion continues for 1 second.

3. Reset condition

• Normal operation is restored and accelerator is not being operated.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

Page 98

ENGINE CONTROL SYSTEM (J08E) 4–875

•

Engine output is restricted.

5. Symptoms on the vehicle when the DTC is set

• Engine output is insufficient.

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is detected after test drive.

8. Estimated failure factors

• Damaged element inside EGR valve actuator

Page 99

ENGINE CONTROL SYSTEM (J08E)4–876

VNT controller

VNT actuator

ENG No.1 SUB W/H ENG No.1 W/H

LM8

(AMPU)

LMY

LMZ

(HSPW)

(MPU)

LM4

(AHOU)

LM3

(AHOV)

(HOV)

LM2 LMU

(AHOW)

(HOW)

%KQ (ENG)

%KV

(VNTC)

%KW

(VNTA)

LM5

LMW

LMV

(AHSG)

(SLGD)

(HSGD)

LM1 LMX

(AHSP)

(AMPW)

(AMPV)

LMT

(MPV)

LM0

(MPW)

KV0

(VNTV)

KVA

(VNTG)

KV8

(VNTH)

KV9

(VNTL)

L4T

(EGRV)

L4U

(EGRG)

L4S (EGRL)

L4R (EGRH)

(CANH)

K6W

K6V

(CANL)

(HOU)

LMSLM4LMS

LM3LMT

LM2LMU

%Z3LMW

LM5LMV

LM1LMX

LM8LMY

LM7LMZ

LM6LM0

LM7

LM6

%Z3

(ENG)

To CAN circuit (DPR) (BA-1)

EGR

controller

(BA-1)

To CAN circuit (DPR)

EGRL

L4S

EGRH

L4R

EGRV

L4T

EGRG

L4U

Engine

ECU

SAPH16F010300693

P14B8: EGR valve controller temperature sensor 1 (Signal too high) (EGR actuator temp. sensor 1 signal too high)

INFORMATION

1. Technical description

• EGR valve is a butterfly type.

• EGR valve opening is controlled by engine speed and amount of intake air.

• EGR valve opening is adjusted by engine ECU and CAN communication.

• EGR valve will not operate when engine coolant temperature is low (≤ 40 C {104 F})

• DTC is issued when failure message is received from EGR actuator unit.

• EGR actuator system is malfunctioning.

2. DTC set condition

(1) DTC detection condition

• Battery voltage is in the range of 8 V to 16 V.

• There is no disconnection in harness connected to EGR valve.

• Starter switch ON. (Not related to engine speed.)

(2) Judgement criteria

• When temperature of temperature sensor 1 (FET side) inside actuator is at least 200 C {392 F}, and this condi-

3. Reset condition

tion continues for 1 second.

• Normal operation is restored and accelerator is not being operated.

4. Indication, warning or system control regulation when the DTC is set.

• MIL: ON

• Diag lamp: OFF

• Engine output is restricted.

Page 100

ENGINE CONTROL SYSTEM (J08E) 4–877

5. Symptoms on the vehicle when the DTC is set

• Engine output is insufficient.

• –

6. Pre-inspection work

• Check that the battery voltage is in the normal range.

7. After-inspection work

• Clear all past DTCs.

• Check that no DTC is detected after test drive.

8. Estimated failure factors

• Damaged element inside EGR valve actuator