7000 - 7999: 7350

7350-LOST COMMUNICATION WITH PSM

For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:

- With the ignition on
- Battery voltage between 10 and 16 volts
- IOD fuse installed
- PCM is configured correctly
- Set Condition:
Bus messages not received from the PSM for approximately 500ms.





Diagnostic Test

1. VERIFY DTC IS ACTIVE
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

With the scan tool, read active DTCs.
Is this DTC active?

Yes

- Go To 2

No

- Refer to the Stored Lost Communication test procedure. Stored Lost Communication DTCs
- Perform BODY VERIFICATION TEST - VER 1.Verification Tests

2. VERIFY THAT THE POWER STEERING MODULE IS ACTIVE ON THE BUS
Turn the ignition on.
With the scan tool, select Network Diagnostics.
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

- Refer to the No Response test procedure.
Communications - Verbose Codes
- Perform BODY VERIFICATION TEST - VER 1.Verification Tests

3. POWER STEERING MODULE
Replace the Power Steering Module.
Perform ABS VERIFICATION TEST - VER 1. Verification Tests.
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 - VER 1. Verification Tests.

No

- Test Complete.