U110E-LOST AMBIENT TEMPERATURE MESSAGE
For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
The ambient temperature sensor signal is a direct input to the Totally Integrated Power Module (TIPM). The TIPM busses the ambient temperature signal over the CAN network.
-
When Monitored:
Ignition on.
-
Set Condition:
The Powertrain Control Module (PCM) doesn't receive the ambient temperature signal over the CAN C bus from the BCM. The circuit is continuously monitored. One Trip fault.
Possible Causes |
|---|
| CAN C BUS CIRCUIT OPEN OR SHORTED |
| TOTALLY INTEGRATED POWER MODULE (TIPM) |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
| 1. | Ignition on, engine not running. |
| 2. | With the scan too, select View PCM DTCs. |
Is the DTC Active at this time?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
2. U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM) ALSO ACTIVE
| 1. | With the scan too, select View DTCs. |
Is the U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM) also set?
Yes
- Perform the U0141-Lost Communication with IPM (FCM/TIPM) diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing).
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
- (Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) and perform the Stored Lost Communication DTCs diagnostic procedure.