Engine JAC HFC4DA1-2C. Manual — part 31

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines

123

S/N DTC

Meaning

513

P168C

CJ945 Power level is short to battery.

514

P168D

CJ945 Power level is short to ground.

515

P168E

CJ945 Power level is short to ground.

516

P1700

Unreliable clutch signal / Clutch signal error

517

P1710

Overheating of engine speed sensor

518 P1720 Transmission

neutral

position

signal

519

P2002

The particulate oxidation catalyst device is removed.

520

P2004

Overcurrent of EGR valve bridge-H based on temperature

521

P2008

EGR valve circuit is open.

522

P2009

EGR valve circuit is short to ground.

523

P2010

EGR valve circuit is short to power supply.

524

P2014

Under-voltage of EGR valve bridge-H

525

P2015

The turbocharger control valve is stuck.

526

P2072

The throttle valve is frozen.

527

P2076

An error is reported when the EGR valve is stuck in closing or opening.

528

P2077

The signal level of swirl valve position sensor is relatively low.

529 P2078

The signal level measured by the variable swirl valve position sensor is above the
limit.

530

P207A

Overtemperature of EGR valve bridge-H chip

531

P207B

The short-term jitter of EGR valve exceeds the limit.

532

P2100

Open circuit of throttle bridge-H

533

P2101

Overcurrent of throttle bridge-H

534

P2102

Output circuit 1 of throttle bridge-H is short to ground.

535

P2103

Output circuit 1 of throttle bridge-H is short to battery.

536

P2135

Signals of accelerator pedal position sensor 1 and 2 are unreliable.

537

P213A

Open circuit of EGR valve bridge-H

538

P213B

Overload of EGR valve bridge-H

539

P213C

The Port 2 of EGR valve bridge-H chip is short to ground.

540

P213D

The Port 2 of EGR valve bridge-H chip is short to ground.

541

P2141

The Port 1 of EGR valve bridge-H chip is short to ground.

542

P2142

The Port 1 of EGR valve bridge-H chip is short to power supply.

543 P2146 Short

circuit

544 P2149 Short

circuit

545

P2157

Unreliable vehicle speed signal

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines

124

S/N DTC

Meaning

546

P2173

False positive deviation of throttle regulator

547

P2175

False negative deviation of throttle regulator

548

P2226

Fault of signal obtained from CAN by air pressure sensor

549

P2228

The signal value of ambient pressure is below the lower limit.

550

P2229

The signal value of ambient pressure is above the upper limit.

551

P2264

EGR valve circuit is open.

552

P2265

An error is reported when the moisture content in fuel is detected.

553

P2266

EGR valve circuit is short to ground.

554

P2267

EGR valve circuit is short to power supply.

555

P2268

EGR valve circuit is open.

556

P2269

The sensor self-checking signal level is above the upper limit.

557

P2290

The rail pressure is below the minimum set value.

558

P242F

The particulate filter smoke load exceeds the maximum.

559

P2454

The signal level of particulate filter differential pressure sensor is relatively low.

560

P2455

The signal level of particulate filter differential pressure sensor is relatively high.

561 P2458 Particulate

filter

regeneration permanent fault

562

P245A

EGR cooler bypass valve fault

563

P245B

Too low EGR cooling efficiency

564

P245D

The signal level of EGR cooler sensor is relatively high.

565

P250F

Danger is caused by too low fuel level and air ingress into hydraulic system.

566

P2519

A/C switch CAN input signal error

567

P2522

The compressor torque reduction command circuit in electrifying phase is open.

568

P2562

The turbocharger bridge-H chip circuit is open.

569

P2563

The turbocharger control valve is stuck.

570

P2564

The original voltage of EGR valve sensor signal is below the lower limit.

571

P2565

The original voltage of EGR valve sensor signal is above the upper limit.

572

P2621

The throttle signal level is relatively low.

573

P2622

The throttle signal level is relatively high.

574

P2626

The oxygen sensor pump current terminal IP is in open circuit.

575 B0020 Airbag

collision

status

576

U0121

ABS ECU main data loss

577

U0400

CAN received frame BCM1 message length error

578

U0415

CAN received frame ABS1 message length error

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines

125

Section V. Fault Diagnosis for Electronic-Controlled Common Rail Diesel Engines

z Prior to disconnecting or reconnecting the power cord of engine control module (ECM), be sure to turn off the

ignition switch, in order not to damage the ECM.

z All types of engine DTCs are stored in the ECM memory.

z The engine DTCs should be cleared after the maintenance.

Common DTCs and Troubleshooting Methods for Electronic Control Systems of Diesel Engines

1.

DTC

P0475

The exhaust brake valve control line is open.

P0476

The ECU internal driver module of exhaust brake valve control line is
overheating.

P0477

The exhaust brake valve control line is short to ground.

P0478

The exhaust brake valve control line is short to high level.

Fault Description: The engine control unit (ECU) shall actuate the exhaust braking after processing the signal
received from the exhaust brake switch and also check if the exhaust brake feedback signal matches with the ECU
control command. If not, DTC shall be reported.

Diagnosis Hint: The intermittent failure may be caused by poor contact of wire, abrasion of the insulation or damage
of the wire inside insulation.

Check for the following conditions:

z Poor contact of ECU or exhaust brake valve – Check the harness connector

– Loose terminal

– Poor matching and connection

– Breakage of keeper

– Distortion or damage of terminal

– Poor contact between terminal and wire

z Damage of harness – Check the harness for any damage

Terminal ECU

K29 Exhaust

brake

actuator

Exhaust brake actuator

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines

126

Fault Tree:

检查制动阀连接

检修或更换

制动阀问题

更换制动阀

对制动阀外观检测

插接件问题

更换ECU

Y

N

N

Y

检查ECU插接件

Y

检修或更换

N

联系技术支持

N

Check the connection of brake valve.

Connector fault

Repair or replace it.

Check the appearance of brake valve.

Fault of brake valve

Replace the brake valve.

Check the ECU connector.

Repair or replace it.

Replace the ECU.

Get the Technical Support.