FMI 5 – Current below normal or open circuit
Fault code explanation: Faulty relay / Faulty relay circuit
Fault indication: DCU: Engine warning in DCU display.
Electrical fault: None.
Value fault: None.
Symptom: Might get start problems in cold climate.
Possible reason: • Preheater fuse broken.
• An open circuit in sense wiring.
Heating element broken.
Suitable action: 1 Check preheater fuse.
2 Check contact pressure in socket 7 in engine connector B.
3 Check all cable and connections to heating element.
4 Check heating element.
In cold climate the intake air might need too be pre-
heated. This is done by the preheater located on the
intake manifold. A sense wire is connected between
the preheater relay output and B7. The sense wire
checks that the preheat element and the preheat fuse
are not damaged. The activation of the preheater is
controlled by the EMS2 via the preheat relay. EMS2
pin B25 activates the preheat relay.
Preheater fuse is located between preheat relay and
Checking preheater relay page 184
R / BL
A Connector B
B Junction point
30-2 Fault Tracing
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