Tire Pressure Module (TPM)

9047-IMPLAUSIBLE SIGNAL RECEIVED FROM HVAC

For a complete wiring diagram, Refer to the Wiring Information Electrical Diagrams.

- When Monitored:
Ignition on.

- Set Condition:
The TPM Module gets an implausible signal over the CAN B circuit from the HVAC. The circuit is continuously monitored.





1. ACTIVE DTC

NOTE: Diagnose all CAN B and C communication failures before continuing.

1. Ignition on, engine not running.
2. With a scan tool, read DTCs.

Is the DTC active at this time?

Yes

- Go To 3

No

- Go To 2

2. INTERMITTENT CONDITION

NOTE: Check for any of the follow conditions:
- Poor wire to terminal connection
- Corroded terminals
- Backed out or loose terminals
- Broken wire internal to the insulation
- Dirty (partial) module ground

Were any of the above condition present?

Yes

- Repair as necessary.
- Perform TPM VERIFICATION TEST. TPM Verification Test.

No

- DTC is not active at this time. Test complete.

3. HVAC IS ACTIVE ON THE CAN B BUS
1. With the scan tool, attempt to communicate with the HVAC.

Is the HVAC active on the bus?

Yes

- Go To 4

No

- Perform the Loss of Communication with HVAC diagnostic procedureCommunications - Verbose Codes.
- Perform the BODY VERIFICATION TEST. Verification Tests.

4. DTCS STORED OR ACTIVE IN THE HVAC

Are any active DTCs in the HVAC?

Yes

- Perform the appropriate diagnostic procedure.Testing and Inspection
- Perform TPM VERIFICATION TEST. TPM Verification Test.

No

- Go To 5

5. ACTIVE DTCS IN THE ELECTRONIC IGNITION SWITCH/CENTRAL GATEWAY MODULE
1. With the scan tool, read DTCs in the Electronic Ignition Switch/Central Gateway Module.

Are any Communication DTCs active in the Electronic Ignition Switch/Central Gateway Module relating to the HVAC?

Yes

- Perform the appropriate diagnostic procedure.Testing and Inspection
- Perform the BODY VERIFICATION TEST. Verification Tests.

No

- Replace and program the TPM Module.
- Perform TPM VERIFICATION TEST. TPM Verification Test.