VOLVOUU Engine D13F Fault Code: SID 70 FMI 3 Air Inlet Heater Driver #1
CONTROL UNIT:
Engine ECU
DETECTION CONDITIONS:
The engine control unit (E-ECU) registers that the voltage is equal to Ubat.
SYMPTOM:
1. Relay may be continuously activated.
2. High cooling fan speed for charge-air cooling due to high inlet temperature.
POSSIBLE CAUSES:
Signal line short-circuited to Ubat.
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