Hino 338 - Connect the PC Diagnosis Tool

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DEF SCR SYSTEM (DCU) 5–11

2. CONNECT THE PC DIAGNOSIS TOOL

(1) Set the starter switch to the “LOCK” position.

(2) Connect the PC DIAGNOSIS TOOL to the diagnosis connector on

the left side of steering column.

PC diagnosis

connector

SAPH16F020400012

Main Page

Introduction1
Chapter References Regarding this Workshop Manual2
Index: Troubleshooting3
Engine Control System (J08E) Contents4
Table of Contents5
DTC: P081A Starter Disable Circuit Low6
Inspection Procedure: P081A8
Check the DTC Detected (Engine ECU) (Hino-DX)8
Inspect the Starter Cut Relay Connector8
Inspect for Disconnection in Wire Harness of Starter Cut Relay9
Checklist: P081A10
DTC: P081B Starter Disable Circuit High11
Inspection Procedure: P081B13
Checklist: P081B15
DTC: P0850 Neutral Switch - Rationality16
Inspection Procedure: P085018
Inspect the Neutral Switch18
Inspect the Neutral Switch Connector18
Inspect the Neutral Switch Unit18
Inspect the Power Supply of the Neutral Switch19
Inspect the Neutral Switch Harness20
Checklist: P085021
DTC: P1133 PTO Accelerator Sensor (Hi)23
Ispection Procedure: P113325
Inspect the PTO Accelerator Sensor Connector25
Inspect the PTO Accelerator Sensor25
Inspect the PTO Accelerator Sensor Unit26
Inspect for Short-Circuit of the PTO Accelerator Sensor Harness27
Inspect Disconnection of the PTO Accelerator Sensor Harness28
Checklist: P113329
DTC: P119F Fuel Rail Pressure Sensor - Rationality31
Inspection Procedure: P119F33
Check the DTC Detected 1 (Engine ECU) (Hino-DX)33
Inspect the Common Rail Pressure Sensor Connector33
Inspect the Sensor Power Supply34
Inspect the Signal of the Common Rail Pressure Sensor35
Check the DTC Detected 2(Engine ECU) (Hino-DX)35
Checklist: P119F36
DTC: P141F Burner System Malfunction38
Inspection Procedure: P141F39
DTC: P1426 Differential Pressure Sensor - Rationality41
Inspection Procedure: P142643
Check the Differential Pressure Hose and Pipe43
Inspect the Differential Pressure Sensor Connector43
Inspect the Differential Pressure Sensor43
Inspect the Differential Pressure Sensor Unit44
Inspect for Short-Circuit of the Differential Pressure Sensor Harness44
Inspect Disconnection of the Differential Pressure Sensor Harness45
Checklist: P142647
DTC: P1427 Differential Pressure Sensor - out of Range (out of Range Low)49
Inspection Procedure: P142751
Inspect the Power Supply of the Differential Pressure Sensor52
Checklist: P142755
DTC: P1428 Differential Pressure Sensor - out of Range (out of Range High)57
Inspection Procedure: P142859
Inspect the Differential Pressure Sensor Power Supply60
Checklist: P142864
DTC: P1458 Valve Position Control Failure - DC Motor out of Range, Functional (EGR Actuator over Temp Warning Level)66
Inspection Procedure: P145868
Inspect the EGR Valve68
Inspect the EGR Valve Connector69
Inspect the EGR Power Supply69
Inspect the Response Delay of the EGR Valve (Hino-DX)70
Checklist: P145871
DTC: P1459 Controller High Temperature (EGR Actuator over Temp Severe Level)73
Inspection Procedure: P145975
Check the EGR Valve Power Supply76
Checklist: P145978
DTC: P14B0 Controller Store Data Error (EGR Actuator Abnormal Information Reading)80
Inspection Procedure: P14B082
Inspect the EGR Valve Power Supply83
Check the DTC Detected 2 (Engine ECU) (Hino-DX)83
Checklist: P14B084
DTC: P14B2 EGR Controller Power Supply Open Circuit (EGR Actuator Power Supply Open Circuit)85
Inspection Procedure: P14B287
Checklist: P14B289
DTC: P14B3 and P14B490
P14B3: Battery Voltage (High) (EGR Actuator Power Supply too High)90
P14B4: Battery Voltage (Low) (EGR Actuator Power Supply too Low)92
Inspection Procedure: P14B3 and P14B494
Checklist: P14B3 and P14B496
DTC: P14B7 and P14B897
P14B7: EGR Valve Controller Temperature Sensor 1 (Signal too Low) (EGR Actuator Temp. Sensor 1 Signal too Low)97
P14B8: EGR Valve Controller Temperature Sensor 1 (Signal too High) (EGR Actuator Temp. Sensor 1 Signal too High)99
Inspection Procedure: P14B7 and P14B8101
Checklist: P14B7 and P14B8103
DTC: P14BC and P14BD104
P14BC: EGR Valve Controller Temperature Sensor 2 (Signal too Low) (EGR Actuator Temp. Sensor 2 Signal too Low)104
P14BD: EGR Valve Controller Temperature Sensor 2 (Signal too High) (EGR Actuator Temp. Sensor 2 Signal too High)106
Inspection Procedure: P14BC and P14BD108
Checklist: P14BC and P14BD110
DTC: P14BF EGR Valve Controller Temperature Sensor 1, 2 - Rationality (EGR Actuator Temp. Sensor 1 Performance Invalid)111
Inspection Procedure: P14BF113
Check the Response Delay of the EGR Valve (Hino-DX)115
Checklist: P14BF116
DTC: P1515 Charge Air Undercooling118
Inspection Procedure: P1515119
Inspect the Radiator Curtain119
Inspect the Air Cleaner Element119
Inspect the Radiator Fan120
Inspect the Fan Clutch120
Inspect the Intercooler120
Inspect the Intercooler Tube120
Inspect the Radiator121
Checklist: P1515122
DTC: P1530 Engine Stop Switch Malfunction124
Inspection Procedure: P1530125
Inspect the Engine Stop Switch125
Inspect the Engine Stop Switch Connector125
Inspect the Engine Stop Switch Unit125
Inspect for Power Supply Short-Circuit in the Wire Harness of the Engine Stop Switch126
Inspect for Disconnection in the Wire Harness of the Engine Stop Switch126
Checklist: P1530127
DTC: P1601 Fuel Injector Adjustment Data Error129
Inspection Procedure: P1601131
Check the Injector Replaced Record131
Check the Injector Calibration Data (QR CODE) 1 (Hino-DX)131
Check the Injector Calibration Data (QR CODE) 2 (Hino-DX)132
Checklist: P1601133
DTC: P200C DPF over Temperature134
Inspection Procedure: P200C136
Inspect the Exhaust Pipe136
Inspection of the Exhaust Gas Temperature(Hino-DX)137
Inspect the Injector (Hino-DX)137
Perform Engine Basic Inspection (Hino-DX)138
Inspect the Exhaust Gas Temperature Sensor (DOC Outlet) Connector138
Inspect the Outside of the Exhaust Gas Temperature Sensor (DOC Outlet)139
Inspect the Exhaust Gas Temperature Sensor (DOC Outlet) Unit139
Inspect the Exhaust Gas Temperature Sensor (Burner Outlet) Connector140
Inspect the Exhaust Gas Temperature Sensor (Burner Outlet)141
Inspect the Exhaust Gas Temperature Sensor (Burner Outlet) Unit141
Checklist: P200C142
DTC: P203F Empty Reductant Tank145
Inspection Procedure: P203F147
Inspect the DEF Tank147
Inspect the DEF Tank Level Sensor Connector147
Inspect the DEF Tank Level Sensor147
Check the DTC Detected (Engine) (Hino-DX)148
Checklist: P203F149
DTC: P204F Reductant System Performance150
Ispection Procedure: P204F152
DTC: P207F Improper Reductant154
Inspection Procedure: P207F156
Inspect the DEF Concentration156
Perform a Basic Engine Check156
Inspect the Air Flow Sensor156
Inspect the Exhaust Gas Temperature Sensor (SCR Inlet) Connector157
Inspect the Exhaust Gas Temperature Sensor (SCR Inlet)157
Inspect the Exhaust Gas Temperature Sensor (SCR Inlet) Unit158
Check the DEF Pipe (Pump Injector)158
Inspect the DEF Injector 1 (Hino-DX)159
Inspect the DEF Injector 2 (Hino-DX)159
Inspect the Nox Sensor (Hino-DX)160
Inspect the SCR Catalyst (Hino-DX)161
Checklist: P207F162
DTC: P20EE Nox Converting Catalyst Conversion Efficiency166
Inspection Procedure: P20EE168
Check the DEF Solution168
Perform a Basic Engine Check (Hino-DX)168
Checklist: P20EE174
DTC: P2100 DC Motor for Intake Throttle Valve - Circuit (Open Circuit (Circuit Low))178
Inspection Procedure: P2100180
Inspect the Diesel Throttle Connector180
Inspect the Diesel Throttle180
Inspect the Diesel Throttle Power Supply180
Inspect the Diesel Throttle Power Supply Harness181
Check the Operation of the Diesel Throttle (Hino-DX)181
Checklist: P2100183
DTC: P2101 Intake Throttle Valve - Functional185
Inspection Procedure: P2101187
Inspect the Air Hose and Air Pipe187
Inspect the Exhaust Muffler (Exhaust Pipe)188
Inspect the Exhaust Brake Valve188
Check the Operation of the Diesel Throttle Valve (Hino-DX)190
Checklist: P2101191
DTC: P2103 DC Motor for Intake Throttle Valve - Circuit (Short Circuit (Circuit High))193
Inspection Procedure: P2103195
Inspect the DTC Detected (Engine ECU) (Hino-DX)197
Checklist: P2103198
DTC: P2120 Throttle/Pedal Position Sensor/Switch "D" Circuit200
Inspection Procedure: P2120202
Check the DTC Detected (Engine ECU) 1 (Hino-DX)202
Check the DTC Detected (Engine ECU) 2 (Hino-DX)202
Check the DTC Detected (Engine ECU) 3 (Hino-DX)203
Cbhecklist: P2120204
DTC: P2122 and P2123205
P2122: Accelerator Pedal Position Sensor 1 - out of Range (out of Range Low)205
P2123: Accelerator Pedal Position Sensor 1 - out of Range (out of Range High)206
Insection Procedure: P2122 and P2123207
Inspect the Accelerator Sensor 1 Connector207
Inspect the Accelerator Sensor 1 Unit207
Inspect the Power Supply of the Accelerator Sensor 1208
Inspect the Signal Circuit of the Accelerator Sensor 1208
Inspect for Short-Circuit of the Accelerator Sensor 1 Harness209
Inspect Disconnection of the Accelerator Sensor 1 Harness210
Checklist: P2122 Ana P2123212
DTC: P2127 and P2128214
P2127: Accelerator Pedal Position Sensor 2 - out of Range (out of Range Low)214
P2128: Accelerator Pedal Position Sensor 2 - out of Range (out of Range High)216
Inspection Procedure: P2127 and P2128217
Inspect the Accelerator Sensor Connector217
Inspect the Accelerator Sensor217
Inspect the Accelerator Sensor Unit218
Inspect the Power Supply of the Accelerator Sensor219
Inspect the Signal Circuit of the Accelerator Sensor219
Inspect for Short-Circuit of the Accelerator Sensor Harness220
Inspect Disconnection of the Accelerator Sensor Harness221
Checklist: P2127 and P2128223
Dtc: P2135225
P2135: Intake Throttle Valve Position Sensor - Rationality225
Inspection Procedure: P2135227
Inspect the Intake Throttle Valve Position Sensor Connector228
Inspect the Signal Wire Harness of the Diesel Throttle228
Inspect the Engine ECU229
Checklist: P2135230
DTC: P2138 Accelerator Pedal Position Sensor - Rationality232
Inspection Procedure: P2138233
Inspect the Accelerator Sensor Signal234
Checklist: P2138236
DTC: P2146 Fuel Injector Driver Circuit 1 - Circuit (Circuit Open)238
Inspection Procedure: P2146240
Inspect the Injector Connector240
Inspect the Injector Power Supply240
Inspect the Injector Wire Harness Power Supply (Engine ECU - Injector Linked-Up Connector)241
Inspect for Short-Circuit of the Injector Wire Harness (between Injector Linked-Up Connector and Injector Harness Connector)241
Inspect the Injector Unit242
Checklist: P2146244
DTC: P2147 and P2148246
P2147: Fuel Injector Driver Circuit 1 - Circuit (Circuit Low)246
P2148: Fuel Injector Driver Circuit 1 - Circuit (Circuit High)248
Inspection Procedure: P2147 and P2148250
Inspect for Short-Circuit of the Injector Harness (Engine ECU - Injector Linked-Up Connector)250
Inspect for Short-Circuit of the Injector Harness (between Injector Linked-Up Connector and Injector Harness Connector)251
Inspect Disconnection of the Injector Harness251
Checklist: P2147 and P2148253
DTC: P2149 Fuel Injector Driver Circuit 2 - Circuit (Circuit Open)255
Inspect the Injector Wire Harness Power Supply (Engine ECU -Injector Linked-Up Connector)258
Checklist: P2149261
DTC: P2150 and P2151263
P2150: Fuel Injector Driver Circuit 2 - Circuit (Circuit Low)263
P2151: Fuel Injector Driver Circuit 2 - Circuit (Circuit High)265
Inspection Procedure: P2150 and P2151267
Checklist: P2150 and P2151270
DTC: P2184 and P2185272
P2184: Engine Coolant Temperature Sensor 2 - out of Range (out of Range Low)272
P2185: Engine Coolant Temperature Sensor 2 - out of Range (out of Range High)274
Inspection Procedure: P2184 and P2185276
Inspect the Engine Coolant Temperature Sensor 2 Connector276
Inspect the Engine Coolant Temperature Sensor 2276
Inspect the Engine Coolant Temperature Sensor 2 Unit276
Inspect the Engine Coolant Temperature Sensor 2 Power Supply277
Inspect for Short-Circuit of the Engine Coolant Temperature Sensor 2 Wire Harness277
Inspect Disconnection of the Wire Harness of Engine Coolant Temperature Sensor 2278
Checklist: P2184 and P2185279
DTC: P2214: Nox Sensor (SCR Downstream) - Performance and Monitoring Capability281
Inspection Procedure: P2214283
Inspection of the DEF283
Inspect the Air Flow Sensor Connector284
Inspect the Exhaust Temperature Sensor (DOC Outlet) Connector286
Inspect the Exhaust Gas Temperature Sensor (DOC Outlet)286
Inspect the Ambient Air Temperature Sensor Connector287
Inspect the Ambient Air Temperature Sensor Unit288
Inspection of the DEF Injector (Hino-DX)288
Checklist: P2214290
DTC: P2227: Barometric Pressure Sensor - Rationality295
Inspection Procedure: P2227297
Inspect the Boost Pressure Sensor Connector297
Inspect the Boost Pressure Sensor297
Checklist: P2227299
DTC: P2228 and P2229300
P2228: Barometric Pressure Sensor - out of Range (out of Range Low)300
P2229: Barometric Pressure Sensor - out of Range (out of Range High)302
Inspection Procedure: P228 and P2229303
Check the DTC Detected (Engine ECU) 1303
Check the DTC Detected (Engine ECU) 2303
Checklist: P2228 and P2229304
DTC: P2269: Water in Fuel Condition305
Inspection Procedure: P2269306
Inspect the Fuel Filter306
Inspect the Fuel Filter Water Level Sensor Connector306
Inspect the Fuel Filter Water Level Sensor Unit306
Inspect the Fuel Filter Water Level Sensor Power Supply307
Inspect for Short-Circuit in Wire Harness of the Fuel Filter Water Level Sensor307
Inspect for Disconnection in Wire Harness of the Fuel Filter Water Level Sensor308
Checklist: P2269309
DTC: P226C: Boost Pressure Slow Response311
Inspection Procedure: P226C313
Check the Response Delay of the VNT Controller (Hino-DX)313
Check the Air Intake System315
Check the Operation of the VNT Actuator (DC Motor) (Hino-DX)316
Checklist: P226C317
DTC: P22D3: Nozzle Stuck (VNT Stick Failure)320
Inspection Procedure: P22D3322
Checklist: P22D3324
DTC: P240F: EGR Flow Slow Response325
Inspection Procedure: P240F328
Inspect the Intake Air Temperature Sensor (Intake Manifold) Connector331
Inspect the Intake Air Temperature Sensor (Intake Manifold)331
Check the Injector (Hino-DX)332
Checklist: P240F334
DTC: P242B: Exhaust Gas Temperature Sensor (DOC Inlet) - Rationality338
P242B: Exhaust Gas Temperature Sensor (DOC Inlet) - Rationality340
Inspection Procedure: P242B342
Inspect the Exhaust Gas Temperature Sensor (DOC Inlet) Connector342
Inspect the Exhaust Gas Temperature Sensor (DOC Inlet)342
Inspect the Exhaust Gas Temperature Sensor (DOC Inlet) Unit342
Inspect for Short-Circuit of the Exhaust Gas Temperature Sensor (DOC Inlet) Harness343
Inspect Disconnection of the Exhaust Gas Temperature Sensor (DOC Inlet) Harness344
Checklist: P242B346
DTC: P242C and P242D: Exhaust Gas Temperature Sensor (DOC Inlet) - out of Range (out of Range Low)348
P242D: Exhaust Gas Temperature Sensor (DOC Inlet) - out of Range (out of Range High)350
Inspection Procedure: P242C and P242D352
Checklist: P242C and P242D356
DTC: P244A: Filtering Performance (Missing Substrate)358
P244A: Filtering Performance (Missing Substrate)360
Inspection Procedure: P244A362
Check the DTC Detected (Engine ECU)362
Check the Exhaust Gas Temperature Sensor (DOC Inlet) (Hino-DX)362
Inspect the Differential Pressure Sensor Pipe363
Inspect the Differential Pressure Sensor Hose363
Inspect the DPR Filter366
Inspect the Exhaust Gas Temperature Sensor (Burner Inlet) Connector366
Inspect the Outside of the Exhaust Gas Temperature Sensor (Burner Inlet)367
Inspect the Exhaust Gas Temperature Sensor (Burner Inlet) Unit367
Check the Response of the EGR Valve369
Check the Response Delay of the VNT Controller370
Inspect the Diesel Throttle Valve371
Inspect the SCV371
SCV Free Acceleration Test373
Test Method373
Types of Hino-DX Data to be Measured374
If the Following Symptoms Occur, FAIL. if Not, OK374
Checklist: P244A378
DTC: P244B: Incomplete Regeneration384
Inspection Procedure (Sheet 1): P244B387
Check the DPR Soot Accumulation Quantity387
Check the DPR Filter388
Inspect the Differential Pressure Sensor (Exhaust Gas Pressure Sensor) Unit389
Perform an Engine Basic Inspection [Hino-DX]391
Inspect the Air Flow Sensor (Hino-DX)391
Inspect the Exhaust Gas Temperature Sensor (Burner Inlet)392
Inspection Procedure (Sheet 2): P244B395
Check the DTC Detected (BCU (Burner))396
Check the Burner System 1 (Hino-DX)396
Check Burner System 2 (Hino-DX)397
Check Burner System 3 (Hino-DX)397
Check Burner System 4 (Hino-DX)398
Inspect DPR Manual Regeneration Switch (DPR Switch)398
Inspect DPR Indicator Light399
Inspect Accelerator Switch400
Inspect PTO Signal400
Inspect the External Accelerator Signal (Hino-DX)401
Inspect Injector (Hino-DX)402
Checklist (Sheet): P224B403
Checklist (Sheet 2): P224B407
DTC: P2457: EGR Cooler Performance413
Inspection Procedure: P2457415
Inspect the EGR Cooler Outlet Gas Temperature Sensor Connector415
Inspect the EGR Cooler Outlet Gas Temperature Sensor415
Inspect the EGR Cooler Outlet Gas Temperature Sensor Unit415
Inspect the Coolant416
Inspect the EGR Cooler 1416
Inspect the EGR Cooler 2416
Inspect the SCV (Hino-DX)418
Checklist: P2457426
DTC: P2459: Frequent Regeneration430
Checklist: P2459432
DTC: P2463: DPF Clogged433
Inspection Procedure: P2463435
Check the DTC Detected (Burner)435
Burner System Check 1 (Hino-DX)436
Burner System Check 2 (Hino-DX)436
Burner System Check 3 (Hino-DX)437
Burner System Check 4 (Hino-DX)437
Inspect DPR Switch438
Inspect the DPR Indicator Light439
Inspect the Accelerator Switch440
Inspect the PTO Switch440
Check the External Accelerator Signal (Hino-DX)441
Checklist: P2463442
DTC: P246F: Exhaust Gas Temperature Sensor (DOC Outlet) - Rationality447
P246F: Exhaust Gas Temperature Sensor (DOC Outlet) - Rationality449
Inspection Procedure: P246F451
Inspect for Short-Circuit of the Exhaust Gas Temperature Sensor (DOC Outlet) Harness452
Inspect Disconnection of the Exhaust Gas Temperature Sensor (DOC Outlet) Harness453
Checklist: P246F455
DTC: P2470 and P2471457
P2470: Exhaust Gas Temperature Sensor (DOC Outlet) - out of Range (out of Range Low)457
P2471: Exhaust Gas Temperature Sensor (DOC Outlet) - out of Range (out of Range High)459
Inspection Procedure: P2470 and P2471461
Inspect the Exhaust Gas Temperature Sensor (DOC Outlet) Power Supply462
Check Short-Circuit in Wire Harness of Exhaust Gas Temperature Sensor (DOC Outlet)462
Check Disconnection in Wire Harness of Exhaust Gas Temperature Sensor (DOC Outlet)463
Checklist: P2470 and P2471465
DTC: P2563: Nozzle Position Sensor Failure Range (High Level) (VNT Actuator Position Sensor Performance Invalid)467
Inspection Procedure: P2563469
Check the Connector Connection (Hino-DX)470
Inspect the VNT Actuator Harness470
Replace the VNT Controller (Hino-DX)471
Checklist: P2563472
DTC: P2564 and P2565474
P2564: Nozzle Position Sensor Failure Range (Low Level) (VNT Actuator Position Sensor Signal too Low)474
P2565: Nozzle Position Sensor Failure Range (High Level) (VNT Actuator Position Sensor Signal too High)476
Inspection Procedure: P2564 and P2565478
Checklist: P2564 and P2565481
DTC: P259E: Nozzle Operating Range Failure -NARROW (VNT Actuator Wiping Error (too Narrow Range))483
Inspection Procedure: P259E485
Check the Turbocharger External Appearance486
Check the Operation of the VNT Controller (Hino-DX)486
Check the Response Delay of the VNT Controller 2 (Hino-DX)487
Checklist: P259E488
DTC: P259F: Nozzle Operating Range Failure -WIDE (VNT Actuator Wiping Error (too Wide Range))490
Inspection Procedure: P259F492
Check Operation of VNT Controller (Hino-DX)493
Checklist: P259F495
DTC: P2635: Fuel Pump Low Flow/Performance497
Inspection Procedure: P2635499
Inspect the Start of the Engine499
Inspect the Supply Pump499
Function Check of Supply Pump (Hino-DX)499
SCV Free Acceleration Test (Hino-DX)500
Check the Engine ECU500
Inspect the Fuel Pipe and Hose501
Inspect the Fuel Tank Breather502
Inspect the Fuel Tank Feed Pipe502
Inspect the Fuel Tank502
Inspect the Supply Pump Gauze Filter502
Inspect the Fuel High-Pressure Pipe503
Inspect the Bubble Separator503
Inspect the SCV Connector504
Inspect the Common Rail Pressure Sensor Power Supply504
Inspect the Crankshaft Position Sensor (Engine Speed Main Sensor) (Hino-DX)505
Inspect the Fuel Return Pipe and Hose506
Check Again the Fuel Pipe507
Check Again the Sensor System508
Checklist: P2635514
DTC: P268A and P2696519
P268A: Fuel Injector Adjustment Data Error519
P2696: Fuel Injector Adjustment Data Error521
Inspection Procedure: P268A and P2696523
Check the Injector Replace Record523
Inspect the Injector Calibration Data (QR CODE) (Hino-DX)523
Checklist: P268A and P2696525
DTC: P2BA9: Insufficient Reagent Quality526
Inspection Procedure: P2BA9528
Inspect the DEF528
Check the DEF Quality Sensor529
Checklist: P2BA9530
DTC: U0073: Engine ECU CAN Communication Bus for Emission Control System - Bus off532
Inspection Procedure: U0073534
Checklist: U0073535
DTC: U010A: Engine ECU CAN Communication (EGR Valve Control)536
DTC: U010C: VNT Actuator CAN Communication Error539
DTC: U010E: Engine ECU CAN Communication (Denox ECU)542
DTC: U029D: Engine ECU CAN Communication (Nox Sensor (SCR Upstream))545
DTC: U029E: Engine ECU CAN Communication (Nox Sensor (SCR Downstream))548
DTC: U02A2: Engine ECU CAN Communication (DEF Tank Sensor)551
DTC: U0301: Software Incompatibility with Denox ECU554
Inspection Procedure: U0301556
Inspect the DCU (Hino-DX)556
Checklist: U0301557
DTC: U1001: Engine ECU CAN Communication Bus for Vehicle Control - Bus off558
DTC: U110A: Engine ECU CAN Communication (Vehicle ECU)561
DTC: U111E: Engine ECU CAN Communication (Burner ECU)564
DEF SCR System (DCU) Contents567
DEF SCR System568
Precautions for Diagnosis568
Illustration of Connector and Measurement on Terminal569
Numbering of Connector Terminal569
Precautions for Terminal Measurement569
System Block Diagram570
System Diagram571
Sensor Location572
Exhaust Gas after Treatment System572
Computer (DCU) Wire Harness Connector PIN Assignment574
Signal Check Harness575
Inspection575
Malfunction Indicator Light Status575
Malfunction Indicator Light Illumination Pattern576
Diagnosis Using the PC Diagnosis Tool576
Diagnosis Tool576
Connect the PC Diagnosis Tool577
Diagnostic Trouble Code (DTC) Table578
DTC: P0071 Ambient Air Temperature Sensor - Rationality583
Inspection Procedure: P0071585
Inspect the Connector of the External Resistor585
Inspect the DCU 86P Connector585
Inspect the Ambient Air Temperature Sensor586
Inspect the External Resistor Unit587
Inspect for Short-Circuit in the Ambient Air Temperature Sensor Harness588
Inspect for Disconnections of the Ambient Air Temperature Sensor Harness588
Inspect the Engine Coolant Temperature Sensor Connector589
Inspect the Engine Coolant Temperature Sensor589
Inspect the Engine Coolant Temperature Sensor Unit590
Inspect the DEF Pump Temperature Sensor Connector592
Check the DTC Detected (DCU)592
Checklist: P0071593
DTC: P0072 Ambient Air Temperature Sensor - out of Range (out of Range Low)598
Inspection Procedure: P0072600
Inspect for Disconnection in the Ambient Air Temperature Sensor Harness603
Check the DTC Detected [DCU]604
Checklist: P0072605
DTC: P0073 Ambient Air Temperature Sensor - out of Range (out of Range High)608
Inspection Procedure: P0073610
Checklist: P0073615
DTC: P0562 Sensor Supply Voltage - out of Range (out of Range Low)618
Inspection Procedure: P0562619
Inspect the DCU 53P Connector619
Inspect the Voltage of the DCU Power Supply619
Check the DTC Detected (DCU) (Hino-DX)620
Checklist: P0562621
DTC: P0563 Sensor Supply Voltage - out of Range (out of Range High)622
Inspection Procedure: P0563623
Inspect the Voltage of DCU Power Supply623
Checklist: P0563625
DTC: P060C Denox ECU Error626
Inspection Procedure: P060C627
Check the DTC Detected (DCU) [Hino-DX]627
Checklist: P060C628
DTC: P062F Controller Store Data Error629
Inspection Procedure: P062F630
Checklist: P062F631
DTC: P0667 Denox ECU Temperature Sensor 1, 2 - Rationality632
Inspection Procedure: P0667633
Checklist: P0667634
DTC: P0668 Denox ECU Temperature Sensor (out of Range Low)635
Inspection Procedure: P0668636
Checklist: P0668637
DTC: P0669 Denox ECU Temperature Sensors - out of Range (out of Range High)638
Inspection Procedure: P0669639
Checklist: P0669640
DTC: P068A Main Relay641
Inspection Procedure: P068A643
Inspect the DCU Power Supply Circuit644
Inspect the DCU Harness645
Checklist: P068A647
DTC: P142A DEF Pump Temperature Sensor 1 - out of Range649
Inspection Procedure: P142A651
Inspect the DEF Pump Temperature Sensor Harness651
Check the DTC Detected (DCU) 1 (Hino-DX)652
Check the DTC Detected (DCU) 2652
Checklist: P142A653
DTC: P142B DEF Pump Temperature Sensor 1 - Rationality654
Inspection Procedure: P142B656
Inspect Disconnection of the Ambient Air Temperature Sensor Harness658
Check the Operation of the Coolant Shutoff Valve (Hino-DX)662
Inspect the Engine Coolant Lines and Hoses662
Inspect the DEF Pump663
Checklist: P142B664
DTC: P202E Reductant Delivery Performance669
Inspection Procedure: P202E671
Inspect the DEF Pipe (Pressure Line) between the DEF Pump and the DEF Injector.671
Inspect DEF Injector (1) (Hino-DX)671
Inspect the DEF Injector (2) (Hino-DX)672
Checklist: P202E673
DTC: P203C DEF Tank Level Sensor - out of Range (out of Range Low)676
Inspection Procedure: P203C678
Checklist: P203C679
DTC: P203D DEF Tank Level Sensor - out of Range (out of Range High)680
Inspection Procedure: P203D682
Checklist: P203D683
DTC: P2044 DEF Tank Temperature Sensor - out of Range (out of Range Low)684
Inspection Procedure: P2044686
Checklist: P2044687
DTC: P2045 DEF Tank Temperature Sensor - out of Range (out of Range High)688
Inspection Procedure: P2045690
Checklist: P2045691
DTC: P2047 DEF Injector - Functional692
Inspection Procedure: P2047693
Checklist: P2047694
DTC: P2048 DEF Injector - Disconnection (Disconnection (Low Side))695
Inspection Procedure: P2048696
Inspect for Short-Circuit in the DEF Injector Harness696
Inspect the DEF Injector Unit696
Inspect Disconnection of the DEF Injector Harness697
Checklist: P2048699
DTC: P2049 DEF Injector - Disconnection (Disconnection (High Side))701
Inspection Procedure: P2049703
Inspect the DEF Injector Connector703
DTC the DTC Detected (DCU) (Hino-DX)705
Checklist: P2049706
DTC: P204B DEF Pressure Sensor - Rationality708
Inspection Procedure: P204B710
Checklist: P204B711
DTC: P204C DEF Pressure Sensor - out of Range (out of Range Low)712
Inspection Procedure: P204C714
Inspect the DEF Pump Connector714
Inspect the DEF Pump (Pressure Sensor) Unit714
Check for Short-Circuit in Wire Harness of DEF Pump (Pressure Sensor)715
Check for Disconnection in Wire Harness of DEF Pump (Pressure Sensor)715
Checklist: P204C717
DTC: P204D DEF Pressure Sensor - out of Range (out of Range High)719
Inspection Procedure: P204D721
Checklist: P204D724
DTC: P205B DEF Tank Temperature Sensor - Rationality726
Inspection Procedure: P205B728
Inspect the DEF Tank Temperature Sensor Connector728
Inspect the Ambient Air Temperature Sensor Harness730
Inspect the External Resistor Connector Unit731
Checklist: P205B735
DTC: P205C DEF Tank Temperature Sensor - out of Range (out of Range Low)739
Inspection Procedure: P205C741
Checklist: P205C742
DTC: P205D DEF Tank Temperature Sensor - out of Range (out of Range High)743
Inspection Procedure: P205D745
Checklist: P205D746
DTC: P206A Reductant Quality Sensor - Malfunction747
Inspection Procedure: P206A749
Checklist: P206A750
DTC: P208A DEF Pump Motor - Circuit (Open Load)751
Inspection Procedure: P208A753
Inspect the DEF Pump Harness754
Checklist: P208A755
DTC: P208B DEF Pump Motor - Functional756
Inspection Procedure: P208B757
Inspection of the DEF Pump Pressure (Hino-DX)757
Checklist: P208B758
DTC: P208C DEF Pump Motor - Circuit (Circuit Low)759
Inspection Procedure: P208C760
Check the DEF Pump Wire Harness761
Checklist: P208C762
DTC: P208D DEF Pump Motor - Circuit (Circuit High)763
Inspection Procedure: P208D764
Checklist: P208D766
DTC: P20A0 Reverting Valve for DEF Pump - Circuit (Open Load)767
Inspection Procedure: P20A0769
Inspect the DEF Pump (Reverting Valve) Connector769
Inspect the DEF Pump (Reverting Valve) Unit769
Inspect for Short-Circuit in the DEF Pump (Reverting Valve) Harness770
Inspect Disconnection of the DEF Pump (Reverting Valve) Harness770
Checklist: P20A0772
DTC: P20A1 Reverting Valve for DEF Pump Stuck Close774
Inspection Procedure: P20A1775
Check the Operation of the DEF Pump (Reverting Valve) (Hino-DX)775
Inspect the DEF Pump (Reverting Valve) (Hino-DX)775
Checklist: P20A1777
DTC: P20A2 Reverting Valve for DEF Pump - Circuit (Circuit Low)778
Inspection Procedure: P20A2780
Checklist: P20A2783
DTC: P20A3 Reverting Valve for DEF Pump - Circuit (Circuit High)785
Inspection Procedure: P20A3786
Checklist: P20A3789
DTC: P20B1 DEF Tank Heater Valve - Circuit (Open Load)791
Inspection Procedure: P20B1792
Inspect the Coolant Cut off Valve (DEF Tank Heater Valve) Connector792
Check the Coolant Cut off Valve (DEF Tank Heater Valve) Unit792
Check for Short-Circuit in the Coolant Cut off Valve (DEF Tank Heater Valve) Wire Harness793
Check for Disconnection in the Coolant Cut off Valve (DEF Tank Heater Valve) Wire Harness793
Checklist: P20B1795
DTC: P20B2 DEF Tank Heater Valve Stuck797
Inspection Procedure: P20B2799
Inspect the Engine Coolant System (Pipes or Hoses)800
Coolant Cut off Valve (DEF Tank Heater Valve) Actuation Test (Hino-DX)802
Inspect the Engine Coolant Temperature (Hino-DX)802
Inspect the Coolant Cut off Valve (DEF Tank Heater Valve) Unit803
Inspect the Coolant Cut off Valve (DEF Tank Heater Valve)803
Inspect the DEF Sensor804
Replace the DEF Tank Temperature Sensor805
Checklist: P20B2806
DTC: P20B3 DEF Tank Heater Valve - Circuit (Circuit Low)809
Inspection Procedure: P20B3810
Inspect the Coolant Cut off Valve Connector810
Inspect the Coolant Cut off Valve Unit810
Check for Short-Circuit in the Coolant Cut off Valve Wire Harness811
Check for Disconnection in the Coolant Cut off Valve Wire Harness811
Checklist: P20B3813
DTC: P20B4 DEF Tank Heater Valve - Circuit (Circuit High)815
Inspection Procedure: P20B4816
Check the Coolant Cut off Valve Unit816
Checklist: P20B4819
DTC: P20E8 Suction Line Pressure Build up Check821
Inspection Procedure: P20E8823
Inspect the DEF Quantity823
Inspect the DEF Tank Filter Cap823
Inspect the DEF Pipe824
Leak Test of the DEF Pipe (Hino-DX)825
Inspect the DEF Pressure 1 (Inspection of the DEF Hose) (Hino-DX)826
Inspection of the DEF Pressure 2 (Inspection of the DEF Tank/Sensor) (Hino-DX)827
Inspection of the DEF Pressure 3 (Inspection of the DEF Pump) (Hino-DX)828
Checklist: P20E8829
DTC: P20E9 Back Flow Line Check832
Inspection Procedure: P20E9834
Inspect the Leak of the DEF Pipe (Hino-DX)834
Inspect the DEF Pressure 2 (Inspection of the DEF Sensor) (Hino-DX)836
Inspect the DEF Pressure 2 (Inspection of the DEF Pump) (Hino-DX)837
Checklist: P20E9838
DTC: P20F4 DEF Consumption Failure840
Inspection Procedure: P20F4842
Inspect the DEF Pipe (Pump Injector)842
Inspect DEF Injector 1 (Hino-DX)842
Checklist: P20F4844
DTC: P2201 Nox Sensor (SCR Upstream) - Performance and Monitoring Capability847
Inspection Procedure: P2201849
Inspect the Nox Sensor 1 (SCR Upstream)850
Check the Coolant Temperature Sensor Output Signal (Hino-DX)852
Check the Boost Pressure Sensor Output Signal (Hino-DX)855
Inspect the Intake Manifold Temperature Sensor855
Inspect the Intake Manifold Temperature Sensor Unit856
Inspect the Nox Sensor 1 (Hino-DX)856
Checklist: P2201857
DTC: P2202 Nox Sensor (SCR Upstream) and Heater - Circuit (Circuit Open)860
Inspection Procedure: P2202862
Checklist: P2202863
DTC: P2203 Nox Sensor (SCR Upstream) and Heater - Circuit (Circuit Short)864
Inspection Procedure: P2203866
Checklist: P2203867
DTC: P2204 Nox Sensor (SCR Upstream) - Feedback868
Inspection Procedure: P2204870
Inspect the Nox Sensor 1 (SCR Upstream) (Hino-DX)870
Check the Engine Coolant Temperature Sensor Output Signal (Hino-DX)871
Inspect the Boost Pressure Sensor Output Signal (Hino-DX)873
Inspection of the Nox Sensor 1 (Hino-DX)874
Checklist: P2204875
DTC: P2209 Nox Sensor (SCR Upstream) - Heater Performance878
Inspection Procedure: P2209880
Inspect the Nox Sensor 1 (SCR Upstream) Connector880
Inspect the Nox Sensor 1 Harness (CAN Communication Line)880
Inspect the Nox Sensor 1 Harness (GND Line)881
Inspect the Nox Sensor 1 Harness (Power Supply Line)881
Checklist: P2209886
DTC: P2212 Nox Sensor (SCR Downstream) - Feedback889
Inspection Procedure: P2212891
Inspect the Nox Sensor 2 (SCR Downstream) (Hino-DX)891
Inspection of the Nox Sensor 2 (Hino-DX)896
Checklist: P2212897
DTC: P2215 Nox Sensor (SCR Downstream) and Heater - Circuit (Circuit Open)900
Inspection Procedure: P2215902
Checklist: P2215903
DTC: P2216 Nox Sensor (SCR Downstream) and Heater - Circuit (Circuit Short)904
Inspection Procedure: P2216906
Checklist: P2216907
DTC: P2222 Nox Sensor (SCR Downstream) - Heater Performance908
Inspection Procedure: P2222910
Inspect the Nox Sensor 2 (SCR Downstream) Connector910
Inspect the Nox Sensor 2 Harness (CAN Communication Line)910
Inspect the Nox Sensor 2 Harness (GND Line)911
Inspect the Nox Sensor 2 Harness (Power Supply Line)911
Inspect Exhaust Gas Temperature Sensor (SCR Inlet) Connector912
Check the Nox Sensor 2 (Hino-DX)915
Checklist: P2222916

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