Test W: The Overtemp Warning Indicator Is Inoperative
PINPOINT TEST W: THE OVERTEMP WARNING INDICATOR IS INOPERATIVEW1-W2:
W3-W4:
Normal Operation
If the overtemp warning indicator is illuminated (not flashing), at least one of the following temperature related conditions exist:
- the internal combustion engine coolant is overheated.
- the electric motor electronics loop coolant is overheated.
- the failsafe cooling feature is in Mode 1 which means the internal combustion engine is running a limited operating strategy in an attempt to reduce engine temperature.
If the indicator is flashing, the failsafe cooling feature is in Mode 2 which means the internal combustion engine will shut down shortly due to an unresolvable engine overtemp condition. The input to the cluster is on the CAN circuits from the PCM.
Possible Causes
- instrument cluster
- PCM