U0163

U0163-LOST COMMUNICATION WITH NAVIGATION MODULE (NAV)





For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

With the ignition in run.

- Set Condition:

Bus messages not received from the Navigation Module (NAV) for approximately 2 to 5 seconds.





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.

NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

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 the BODY VERIFICATION TEST - VER 1. Body Verification Test

2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS

With the scan tool, read all active DTCs from all modules.

NOTE: Check for BCM configuration, PCI or CAN 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

- Diagnose and repair the DTC.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 3

3. VERIFY THAT THE NAVIGATION MODULE IS ACTIVE ON THE BUS

Turn the ignition on.

With the scan tool, select ECU View.

Verify that the Navigation Module is active on the bus.

Is the Navigation Module active on the bus?

Yes

- Go To 4

No

- Refer to No response test procedure.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS

With the scan tool, select Network View and select Advanced.

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

Yes

- Replace/update the Navigation Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace/update the module that set this DTC
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test