Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
135
− Poor contact between terminal and wire
Check the harness for any damage. If the harness appears normal, observe the ECT indication on the diagnostic tool
while moving relevant connector and harness of ECT sensor. If the ECT indication changes, there must be failure in
that part. If the DTC won’t appear again, the fault record data can be used for determining the self-diagnostic code and
the running mileage after the previous setting can be used for determining the occurrence frequency of that condition,
which can facilitate the troubleshooting for overheating.
After the engine is started, the engine coolant temperature shall increase steadily to about 90°C (194°F) and then
become stable after the thermostat is disconnected.
Terminal ECU
A37 Signal terminal of ECT sensor
A50 Ground terminal of ECT sensor
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