U110E-LOST AMBIENT TEMPERATURE MESSAGE

For a complete wiring diagram Refer to Section 8W.

When Monitored:
Ignition on.
Set Condition:
The PCM doesn't receive the ambient temperature signal over the CAN C bus from the TIPM. The circuit is continuously monitored. One Trip fault.

Possible Causes

CAN C BUS CIRCUIT OPEN OR SHORTED

TOTALLY INTEGRATED POWER MODULE

PCM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Theory of Operation

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.

Diagnostic Test

1. ACTIVE DTC

Ignition on, engine not running.
With the scan tool, select View DTCs.

Is the DTC Active at this time?

Yes

Go To 2

No

Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

2. U0141-LOST COMMUNICATION WITH FRONT CONTROL MODULE (TIPM) ALSO ACTIVE

With the scan tool, select View DTCs.

Is the U0141-NO BUS MESSAGE RECEIVED FROM THE FCM (TIPM) also set?

Yes

Follow the diagnostics for U0141-LOST COMMUNICATION WITH FRONT CONTROL MODULE (TIPM). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING)

No

Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)