MID 128, SID 33 Fan clutch output
FMI 3 – Voltage above normal or shorted high
Fault code explanation: Faulty solenoid or solenoid circuit.
Fault indication: Yellow alarm status.
Fault stored in memory: Yes.
Symptom: Fan runs at full speed.
Conditions for fault code: Faulty signal at pin B49.
DTL = 5000 ms
Possible reason: • Short circuit in the clutch solenoid wiring.
•
Faulty solenoid.
Suitable action: 1 Check all cables and connectors between the engine ECU and the
clutch solenoid.
2 Check the solenoid.
FMI 4 – Voltage below normal or shorted low
Fault code explanation: Faulty solenoid or solenoid circuit.
Fault indication: Yellow alarm status.
Fault stored in memory: Yes.
Symptom: Fan is always deactivated or always activated if fault is intermittent.
Conditions for fault code: Faulty signal at pin B49.
DTL = 5000 ms
Possible reason: • Short circuit in the clutch solenoid wiring.
• Faulty solenoid.
Suitable action: 1
Check all cables and connectors between the engine ECU and the
clutch solenoid.
2 Check the solenoid.
FMI 5 – Current below normal or open circuit
Fault code explanation: Faulty solenoid or solenoid circuit.
Fault indication: Yellow alarm status.
Fault stored in memory: Yes.
Symptom: Fan runs at full speed.
Conditions for fault code: Faulty signal at pin B49.
DTL = 5000 ms
Possible reason: • Open circuit in the clutch solenoid wiring.
• Faulty solenoid.
Suitable action: 1
Check all cables and connectors between the engine ECU and the
clutch solenoid.
2 Check the solenoid.
30-2 Fault Tracing
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