Engine JAC HFC4DA1-2C. Manual — part 35

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

139

Fault Tree:

Repair accordingly.

Repair the harness.

Repair accordingly.

Replace the component.

Check the component connector.

Connector fault

Visually check the component.

Component fault

ECU connector fault

Check continuity and insulating property.

Electrical fault

Replace the component.

Does the problem still exist?

Get the Technical Support.

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

140

6.

DTC P0201

The

1

st

cylinder fuel injector circuit is open.

P0263

Other errors of the 1

st

cylinder fuel injector

P1200

The forward error correction of the 1

st

fuel injector is too large.

P1201

The reverse error correction of the 1

st

fuel injector is too large.

P120C

The dynamic forward error correction of the 1

st

fuel injector is too large.

P120D

The dynamic reverse error correction of the 1

st

fuel injector is too large.

P1233

Other errors of the 1

st

cylinder fuel injector

P1234

Other errors of the 1

st

cylinder fuel injector

P1235

Other errors of the 1

st

cylinder fuel injector

P1613

The electrifying time detected by galloping prevention monitor is too long.

Fault Description: The ECU controls the switching-on circuit of fuel injector directly. The ECU controls the time for
switching on each fuel injector via adopting a device named “Driver” to supply PWM current to each fuel injector
control circuit. The driver owns a feedback circuit, which is monitored by ECU to verify if the control circuit is open
or short. If any failure in the fuel injector control circuit is detected by ECU, the fuel injector control circuit DTC shall
be generated.

Diagnosis Hint: For the failure in wire connector shall trigger the setting of DTC, be sure to check the connectors
relevant to this diagnostic procedure for short circuit of terminal or poor contact of wire, prior to replacement of any
component. Observe the state parameter of relevant fuel injector on the diagnostic tool while shaking the wire and
connector relevant to the test. If any intermittent failure is existed in the tested wire or connector, the relevant failure
shall be displayed on the diagnostic tool.

Performing compression test is helpful for locating the intermittent failure.

Terminal ECU

A16 1

st

fuel injector “High”

A47 1

st

fuel injector “Low”

1

st

cylinder fuel injector “High”

1

st

cylinder fuel injector “Low”

1

st

cylinder

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

141

Fault Tree:

Turn off the ignition switch and check the fuel

injector connector.

Connector fault

Repair accordingly.

Disconnect the fuel injector and turn on the ignition

switch.

Does the problem still exist?

Refer to “Inspection of Fuel Injector

Wiring” listed below.

Clear the DTC, turn off the ignition switch, reconnect

the fuel injector and turn on the ignition switch.

Does the problem reoccur?

Replace relevant fuel injector and

update the ECU data.

Repeat the above procedures for other fuel injectors.

Check the wiring of fuel injector.

Check the ECU connector.

Connector fault

Repair accordingly.

Repair the harness.

Check continuity and insulating property.

Electrical fault

Get the Technical Support.

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

142

7.

DTC P0202

The

2

nd

cylinder fuel injector circuit is open.

P0264

The low end of the 2

nd

fuel injector is short to the high end.

P0265

The low end of the 2

nd

fuel injector is short to the high level.

P0266

Other errors of the 2

nd

cylinder fuel injector

P1202

The forward error correction of the 2

nd

fuel injector is too large.

P1203

The reverse error correction of the 2

nd

fuel injector is too large.

P120E

The dynamic forward error correction of the 2

nd

fuel injector is too large.

P120F

The dynamic reverse error correction of the 2

nd

fuel injector is too large.

P1236

Other errors of the 2

nd

cylinder fuel injector

P1237

Other errors of the 2

nd

cylinder fuel injector

P1238

Other errors of the 2

nd

cylinder fuel injector

Fault Description: The ECU controls the switching-on circuit of fuel injector directly. The ECU controls the time for
switching on each fuel injector via adopting a device named “Driver” to supply PWM current to each fuel injector
control circuit. The driver owns a feedback circuit, which is monitored by ECU to verify if the control circuit is open
or short. If any failure in the fuel injector control circuit is detected by ECU, the fuel injector control circuit DTC shall
be generated.

Diagnosis Hint:

For the failure in wire connector shall trigger the setting of DTC, be sure to check the connectors relevant to this
diagnostic procedure for short circuit of terminal or poor contact of wire, prior to replacement of any component.
Observe the state parameter of relevant fuel injector on the diagnostic tool while shaking the wire and connector
relevant to the test. If any intermittent failure is existed in the tested wire or connector, the relevant failure shall be
displayed on the diagnostic tool.

Performing compression test is helpful for locating the intermittent failure.

Terminal ECU

A02 2

nd

fuel injector “High”

A31 2

nd

fuel injector “Low”

2

nd

cylinder fuel injector “High”

2

nd

cylinder fuel injector “Low”

2

nd

cylinder