7000 - 7999: 7350

7350-LOST COMMUNICATION WITH PSM

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

- When Monitored:
With the ignition on.

Battery voltage between 10 and 16 volts.

IOD fuse installed.

ECM is configured correctly.

- Set Condition:
Bus messages not received from the PSM for approximately 500 ms.





1. VERIFY DTC IS ACTIVE

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

1. With the scan tool, read active DTCs.

Is this DTC active?

Yes

- Go To 2

No

- Perform the appropriate Loss of Communication diagnostic procedure.Stored Lost Communication DTCs

2. VERIFY THAT THE POWER STEERING MODULE IS ACTIVE ON THE BUS
1. Turn the ignition on.
2. With the scan tool, select Network Diagnostics.
3. Verify that the Power Steering Module is active on the bus.

Is the Power Steering Module active on the bus?

Yes

- Go To 3

No

- Communications - Verbose Codesfor No Response diagnostic procedures.
- Perform the BODY VERIFICATION TEST Verification Tests.

3. POWER STEERING MODULE
1. Replace the Power Steering Module.
2. Perform ABS VERIFICATION TEST Verification Tests.
3. With the scan tool, read ABS DTCs.

Did DTC 7350-LOST COMMUNICATION WITH PSM reset?

Yes

- Replace the Anti-Lock Brakes Module.
- Perform ABS VERIFICATION TEST Verification Tests.

No

- Test Complete.