MID 128, SID 1/2/3/4/5/6 Injector # 1-6
FMI 3 – Voltage above normal or shorted high
(Short to battery voltage, injector low voltage side)
Fault code explanation: Fault in the injection system.
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 7.1–7.6
Value fault: None.
Symptom: Faulty unit injector is shut off, engine runs on 5 cylinders. Limp home on rest
of unit injectors. Engine performance is reduced. Abnormal sound.
Preconditions: NOTICE!
Identify which injector by the SID number.
Conditions for fault code: Injector activated and faulty voltage in injector low side.
Possible reason: •
Short circuit to battery voltage on the pin on the respective injector’s
low voltage side. (EMS2 pin: 36, 40, 44, 48, 52, 56 and 12, 16, 20, 24,
28, 32)
• Short circuit between high voltage and low voltage sides.
• Short circuit to battery voltage in low voltage injector wire.
Suitable action: 1 Check the cable harness between injectors and engine control unit
(EMS2).
FMI 4 – Voltage below normal or shorted to lower voltage
(Short to battery negative, injector high voltage side)
Fault code explanation: Fault in the injection system.
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 7.1–7.6
Value fault: None.
Symptom: Faulty unit injector is shut off, engine runs on 5 cylinders. Limp home on rest
of unit injectors. Engine performance is reduced. Abnormal sound.
Preconditions: NOTICE! Identify which injector by the SID number.
Conditions for fault code: Injector activated and faulty voltage in injector high side.
Possible reason: • Short circuit to battery negative on the pin on the respective injector’s
high voltage side. (EMS2 pin: 59, 60, 61 and 62)
•
Short circuit to battery negative in high voltage injector wire.
Suitable action: 1
Check the cable harness between injectors and engine control unit
(EMS2).
30-2 Fault Tracing
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