U0131

U0131-LOST COMMUNICATION WITH POWER STEERING CONTROL MODULE (EPS)





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.

Ignition Off Draw (IOD) fuse installed.

Front Control Module (FCM) is configured correctly.

- Set Condition:
Bus messages not received from the Electronic Power Steering Control Module (EPS) for approximately two to five seconds.





1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE

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

1. Using the scan tool, read active DTCs.

Is this DTC active?

Yes

- Go To 2

No

- Stored Lost Communication DTCs Perform the Stored Lost Communication diagnostic procedure.

2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
1. Using the scan tool, read all active DTCs from all modules.

NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

Does the scan tool display any active DTCs to the conditions listed above?

Yes

- Perform the appropriate diagnostic procedure.

No

- Go To 3

3. VERIFY THAT THE EPS IS ACTIVE ON THE BUS
1. Turn the ignition on.
2. Using the scan tool, select Network Diagnostics.
3. Verify that the EPS is active on the bus.

Is the EPS active on the bus?

Yes

- Go To 4

No

- Manufacturer Code Charts Perform the No Response from EPS diagnostic procedure.

4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
1. Using the scan tool, select Network Diagnostics.

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

Yes

- Replace/update the Power Steering Control Module.
- Perform the EPS VERIFICATION TEST. .

No

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