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procedure manual if an ECM is suspect.
P066700 ECM internal temperature sensor range/performance
ECM internal temperature sensor
Cycle the ignition and allow power latch. Clear the DTC and retest. If the DTC resets, refer to the warranty policy and procedure manual if an ECM is suspect.
P066800 ECM internal temperature sensor circuit low
ECM internal temperature sensor
Cycle the ignition and allow power latch. Clear the DTC and retest. If the DTC resets, refer to the warranty policy and procedure manual if an ECM is suspect.
P066900 ECM internal temperature sensor circuit high
ECM internal temperature sensor
Cycle the ignition and allow power latch. Clear the DTC and retest. If the DTC resets, refer to the warranty policy and procedure manual if an ECM is suspect.
P067000 Glow plug control module - control circuit open
Glow plug control module, control Glow plug control module, control Glow plug control module failure
For glow plug control module circuit tests, Glow Plug System
P069100 Cooling fan control circuit low
Cooling fan control circuit: short circuit Cooling fan control circuit: high
For cooling fan circuit tests, GO to Pinpoint Test G549822p21.
P069200 Cooling fan control circuit high
Cooling fan control circuit: short circuit
For cooling fan circuit tests, GO to Pinpoint Test G549822p21.
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