User Manual

Group28
EngineControlModule(ECM)DiagnosticTrouble
Codes(DTCs)
ECMSPN637,CrankshaftPositionSensor(CKP)–MID128SID22
Typeof
fault:
FMIDescription:
FaultCondition:
Possible
Symptoms:
PossibleCause:
FMI2
•Dataerratic,
intermittentor
incorrect
•Intermittentor
weaksignal
•MILilluminated
•Yellowelectronic
malfunctionlamp
illuminated
•Increasedfuel
consumption
•Impreciseengine
timing
•Increasedfuel
consumption
•Unevencylinder
balancing
•Powerloss
•Smoke
•FaultyCKPsensorharness
•FaultyCKPsensor
FMI3
•Voltageabove
normal,orshorted
tohighsource
•MissingSignal
CKPsensor
•OpenintheCKP
sensorcircuit
•Shorttobatteryin
theCKPsensor
circuit
•Shorttogroundin
theCKPsensor
circuit
•MILilluminated
•Yellowelectronic
malfunctionlamp
illuminated
•Possiblelossof
enginepower
•Increasedfuel
consumption
•FaultyCKPsensorharness
•FaultyCKPsensor
FMI8
•Abnormalfrequency
orpulsewidthor
period
•Erraticor
intermittentsignal
fromCKPsensor
•OpenintheCKP
sensor
•MILilluminated
•Yellowelectronic
malfunctionlamp
illuminated
•Possiblelossof
enginepower
•Increasedengine
starttime
•Increasedfuel
consumption
•Unevencylinder
balancing
•Powerloss
•Smoke
•FaultyCKPsensorharness
•FaultyCKPsensormounting
36