FMI 5 – Current below normal or open circuit
(Break in injector circuit.)
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 or low side.
Possible reason: • Open circuit in low voltage wiring side or high voltage wiring side.
If three
injection fault codes are set there is an Open circuit on the high
side. If one injection fault code is set there is an Open circuit on the low
side.
• Short circuit to battery voltage on the pin on the respective injector’s
high voltage side. (EMS2 pin: 59, 60, 61 and 62)
• Short circuit to battery negative 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)
Suitable action: 1 Check the cable harness between injectors and engine control unit
(EMS2).
2 Check the contact pressure in all sockets regarding the unit injectors in
engine connector A.
30-2 Fault Tracing
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