MID 128, SID 232 5 V supply
FMI 3 – Voltage above normal or shorted high
Fault code explanation: Fault in circuit.
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 9.3
Value fault: None.
Symptom: None.
Conditions for fault code: Abnormally high voltage or short circuit to higher voltage on pin A7.
Possible reason: Short circuit to battery voltage.
Suitable action: 1 Check the supply voltage to the sensors which have set fault codes.
2
Check sensor cables.
3
Check the sensors.
FMI 4 – Voltage below normal or shorted to lower voltage
Fault code explanation: Fault in circuit.
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 9.3
Value fault: None.
Symptom: None.
Conditions for fault code: Abnormally low voltage or short circuit to battery negative on pin A7.
Possible reason: • Short circuit sensor supply voltage cable to battery negative, oil pres-
sure sensor.
•
Short circuit sensor supply voltage cable to battery negative, air inlet
pressure sensor.
Suitable action: 1
Check the supply voltage to the above-mentioned sensors.
2 Check sensor cables.
3 Check the sensors.
Circuit description
Pin A7 on the EMS2 distributes 5 Volt supply voltage
to the oil pressure sensor and the air inlet pressure
sensor.
30-2 Fault Tracing
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