VOLVOUU Engine D13F Fault Code: SID 39 FMI 10 Engine Starter Motor Relay

VOLVOUU Engine D13F Fault Code: SID 39 FMI 10 Engine Starter Motor Relay

CONTROL UNIT:
Engine ECU

DETECTION CONDITIONS:
The engine control unit (E-ECU) registers the starter motor has been activated for 3s but the engine is still not revolving at all.

SYMPTOM:
The starter motor is deactivated.

POSSIBLE CAUSES:
1. Mechanical fault.
2. Faulty engine speed sensor+.
3. Defective cam speed sensor.
4. Power supply problems.
5. Defective starter relay.
6. Faulty starter motor.