Volvo Engine D12D AE E3 (Tier 3) Fault Code: SID70 FMI 4 Air Inlet Heater Driver #1

DETECTION CONDITIONS:
The engine control unit (E-ECU) registers:
1. Drive step for relay for preheating coil activated.
2. Signal line short-circuited to frame ground. (EB7)

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. (EB7)
2. Defective relay.

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