U1113

U1113-LOST A/C PRESSURE MESSAGE



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 Transducer signal over the CAN C bus.

- 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. Pre-Diagnostic Troubleshooting Procedure.

1. ACTIVE DTC
1. Ignition on, engine not running.
2. With the scan tool, view Active Powertrain DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition Test.

2. U0141-LOST COMMUNICATION WITH FRONT CONTROL MODULE (TIPM) ALSO ACTIVE
1. With the scan tool, View DTCs.

Is the U0141-LOST COMMUNICATION WITH FRONT CONTROL MODULE (TIPM) also set?

Yes

- Follow the diagnostics for U0141-LOST COMMUNICATION WITH FRONT CONTROL MODULE (TIPM), U0141.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.

No

- Replace and program the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.