U1113

U1113-LOST A/C PRESSURE MESSAGE





For a complete wiring diagram refer to Diagrams/Electrical.


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.


Diagnostic Test


1. ACTIVE DTC

Ignition on, engine not running.

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

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

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