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.
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