MID 128, PPID 55 ECU temperature
FMI 0 – Data valid but above normal operational range
Fault code explanation: ECU temperature is too high.
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 8.4
Value fault: None.
Symptom: None.
Conditions for fault code: The temperature inside the engine control unit is too high.
Possible reason: • High surrounding temperature.
•
Fault in sensor.
Suitable action: 1
Check if the surrounding temperature is high or if the EMS 2 unit is
exposed to heat radiation.
2 Change EMS 2 unit.
FMI 4 – Voltage below normal or short circuit to lower voltage
Fault code explanation: Faulty sensor / Faulty sensor circuit
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 8.4
Value fault: None.
Symptom: None.
Possible reason: Fault in sensor circuit.
Suitable action: 1 Change EMS 2 unit.
FMI 5 – Current below normal or open circuit
Fault code explanation: Faulty sensor / Faulty sensor circuit
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 8.4
Value fault: None.
Symptom: None.
Possible reason: Fault in sensor circuit.
Suitable action: 1 Change EMS 2 unit.
Circuit description
The temperature
sensor is installed inside of the EMS
2 unit.
30-2 Fault Tracing
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