Pinpoint Test 40: The Over-Temperature Warning Indicator Is Never/Always On
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PINPOINT TEST 40: THE OVER-TEMPERATURE WARNING INDICATOR IS NEVER/ALWAYS ON - HYBRID
Normal Operation
The instrument cluster receives the engine and motor over-temperature command from the PCM over the high speed controller area network (HS-CAN) communication bus. If the PCM detects an engine or motor over-temperature condition, the PCM sends a command to the instrument cluster to turn the over-temperature warning indicator on.If the engine or motor over-temperature message is missing, the instrument cluster sets DTC U0100 in continuous memory and the over-temperature warning indicator remains in the last indication mode (on or off). If the engine over-temperature message is deemed invalid by the instrument cluster, the instrument cluster defaults the over-temperature warning indicator on.
Possible Causes
- PCM
- Instrument cluster
Diagnostic Procedure
