Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
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Diagnosis Hint:
The normal boost pressure sensor shall make quick response to the change of accelerator pedal position, so its slow
action should not appear or it should not act slower than the change of accelerator pedal position.
For poor contact inspection between ECU and IAT sensor, please check the ECU harness connector for the following
conditions:
− Loose terminal
− Poor matching and connection
− Breakage of keeper
− Distortion or damage of terminal
− Poor contact between terminal and wire
Terminal ECU
A07 Power supply terminal of sensor
A53 Temperature signal terminal
A54 Pressure signal terminal
A28 Ground terminal of sensor
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