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Group 30: Electrical system Diagnostic Trouble Codes

MID 128 / MID 144, PPID 6

Engine stop switch

MID 128: Engine control unit

MID 144: DCU/CIU

FMI 3: The voltage exceeds the normal value or is

short circuited to higher voltage.

FMI 4: The voltage is less than the normal value or

is short circuited to lower voltage.

FMI 5: The current is less than the normal value or

is open circuited.

FMI Fault code explanation

3, 4, 5 Faulty circuit

Fault indication

DCU: Engine warning in DCU display.

CIU: Flash code

Flash code

Electrical fault: 4.8 (EMS)

Value fault: None (EMS)

Electrical fault: 5.3 (CIU)

Value fault: None (CIU)

Symptom

The engine can only be stopped by using AUX stop.

FMI5: Engine can’t be stopped.

Volvo TAD650VE User Manual

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