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Group28

EngineControlModule(ECM)DiagnosticTrouble

Codes(DTCs)

FMI5

•Currentbelow

normaloropen

circuit

•Opencircuit•Yellowelectronic

malfunctionlamp

illuminated

•Fautlyintakeairheater(IAH)2

ECMSPN975,EstimatedPercentFanSpeed–(MID128PID26)

Typeof

fault:

FMIDescription:

FaultCondition:

Possible

Symptoms:

PossibleCause:

FMI3

•Voltageabove

normal,orshorted

tohighsource

•Missingsignal

fromFanSpeed

Sensor

•ShortCircuit+,

Measuringline

•ShortCircuit-,

Measuringline

•OpenCircuit,

Measuringline

•OpenCircuit,

Groundline

•Higherfuel

consumption

•Willworkason/off

fan,100%fan

speedifcoolingis

needed

•CoolingFanSpeed(CFS)sensor

failure

•FaultyCoolingFanSpeed(CFS)

sensorharness

45