Lost Communication With PCM

LOST COMMUNICATION WITH PCM







- When Monitored:
Continuously.

- Set Condition:
The Gateway module does not receive any messages from the PCM.





1. ATTEMPT TO COMMUNICATE WITH THE PCM
1. Turn the ignition on.
2. With the scan tool, select ECU View.
3. Verify that the PCM is active on the bus.

Is the PCM active on the bus?

Yes

- Go To 2

No

- Perform the No Response diagnostic procedure. Communications - Verbose Codes

2. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTC'S
1. With the scan tool, select Network View and select Advanced.

Is there more than one module with active DTCs "Logged Against" the PCM?

Yes

- Replace/update the PCM.
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

- Replace/update the module that set this DTC.
- Perform the BODY VERIFICATION TEST. Body Verification Test