U1113

U1113-LOST A/C PRESSURE MESSAGE





For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

Ignition on.

- Set Condition:

The PCM doesn't receive the A/C Pressure signal over the CAN C bus from the TIPM. The circuit is continuously monitored.






Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Theory of Operation

The A/C Pressure Transducer signal is a direct input to the TIPM. The TIPM sends the PCM the A/C pressure signal over the CAN C bus.

Diagnostic Test

1. ACTIVE DTC

NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.

Ignition on, engine not running.

With a scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. Checking for an Intermittent DTC
- Perform the PCM Verification Test Ver. 1. PCM Verification Test

2. U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM) ALSO ACTIVE

With the scan tool read DTCs.

Is the DTC U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM) also set?

Yes

- Perform the diagnostic procedure for U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM).
- Perform the PCM Verification Test Ver. 1. PCM Verification Test

No

- Replace and program the Powertrain Control Module (PCM).
- Perform the PCM Verification Test Ver. 1. PCM Verification Test