Volvo Engine D13F Fault Code: SID 70 FMI 4 Air Inlet Heater Driver #1

Volvo Engine D13F Fault Code: SID 70 FMI 4 Air Inlet Heater Driver #1

CONTROL UNIT:
Engine ECU

DETECTION CONDITIONS:
The engine control unit (E-ECU) registers that the voltage is below 22 V(0.91 x Ubat).

SYMPTOM:
1. Preheating not functioning.
2. White smoke during cold starts.
3. Difficult to start in extreme cold.

POSSIBLE CAUSES:
1. Signal line short-circuited to frame ground.
2. Defective relay.