Possible DTC: P0110 (Air temperature sensor)
Air temperature sensor is integrated into HFM5. Actual value for evaluation: Set value., Ambient temperature
Evaluation display:
A temperature reading ＜ -40°C indicates an open circuit in the signal line
A temperature reading ＞ 120°C indicates a short circuit to GND in the signal line
＊ CC-CODE
C001 (Signal below the lower limit- No signal)
Possible causes of trouble :
Short circuit to GND line Contact resistance HFM5 defective ECU defective |
C002 (Signal above the upper limit)
Possible causes of trouble:
Short circuit to Bat line, Open circuit in wiring ATS in HFM5 defective ECU defective |
Measure the resistance of temperature sensor at the detached ECU plug.
Set value at 0 ~ 30°C : 1.5 ~ 6kΩ
Set value at approx. 50°C : 750 ~ 920kΩ
If set values are not attained , repeat the measurement at temperature sensor in air flow sensor pin 1 to pin 3.
If set values are attained at sensor, check wiring from ECU pin 86 to sensor pin 1 and ECU pin 88 to sensor pin 3.
Replace HFM5 if set value is not attained at air temperature sensor.
