Possible Causes
| Possible Causes |
|---|
| CAN C BUS CIRCUIT OPEN OR SHORTED |
| TOTALLY INTEGRATED POWER MODULE (TIPM) |
| POWERTRAIN CONTROL MODULE (PCM) |
Perform PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .
The ambient temperature sensor signal is a direct input to the TIPM. The TIPM sends the PCM the ambient temperature signal over the CAN C bus.