Manufacturer Code Charts: 85

TPMS DTC Troubleshooting: 85

DTC 85: F-CAN Communication Failure

NOTE: Check for gauge DTCs with the HDS. Diagnostic Aids If gauge DTCs are stored, troubleshoot those DTCs first.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0), then turn the ignition switch to ON (II) again.

4. Wait about 5 seconds.

5. Check for DTCs with the HDS.

Is DTC 85 indicated?
YES - Go to step 6.

NO - The system is OK at this time. Check for loose terminals between the TPMS control unit and the gauge assembly.


6. Test-drive the vehicle.

Does the speedometer work?
YES - Go to step 7.

NO - Check for loose terminals and poor connections at the gauge assembly. If necessary, substitute a known-good gauge assembly, Service and Repair and recheck.


7. Turn the ignition switch to LOCK (0).

8. Disconnect gauge assembly connector A (22P).

9. Disconnect the TPMS control unit 20P connector.

10. Check for continuity between body ground and TPMS control unit 20P connector terminals No. 1 and No. 11 individually.

Is there continuity?
YES - Repair short to body ground in the wire between the TPMS control unit and the gauge assembly.

NO - Go to step 11.






11. Check for continuity between TPMS control unit 20P connector terminals No. 1 and No. 11.

Is there continuity?
YES - Repair short in the wires between the TPMS control unit and the gauge assembly.

NO - Go to step 12.






12. Check for continuity between the TPMS control unit 20P connector terminals and gauge assembly connector A (22P) terminals according to the table.





Is there continuity?
YES - Go to step 13.

NO - Repair open in the wire between the TPMS control unit and the gauge assembly.






13. Substitute a known-good TPMS control unit. Service and Repair

14. Reconnect all connectors.

15. Memorize the tire pressure sensor ID with the HDS. Testing and Inspection

16. Turn the ignition switch to ON (II).

17. Clear the DTC with the HDS.

18. Turn the ignition switch to LOCK (0), then turn the ignition switch to ON (II) again.

19. Wait about 5 seconds.

20. Check for DTCs with the HDS.

Is DTC 85 indicated?
YES - Replace the gauge assembly. Service and Repair

NO - Replace the original TPMS control unit. Service and Repair