JAC HFC4DA1-2C - Page 166

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
167
Fault Tree:
Check the relay connector.
Connector fault
Repair accordingly.
Check the ECU connector.
Connector fault Repair accordingly.
Repair the harness.
Check continuity and insulating property.
Electrical fault
Replace the relay (running ISO
circulation.
)
Fault of ISO circulation
Get the Technical Support.