Manufacturer Code Charts: 85

TPMS DTC Troubleshooting: 85

DTC 85: F-CAN Communication Failure

NOTE: Check for fuel and emissions systems DTCs with the HDS, and troubleshoot the ECM/PCM and F-CAN communications first: Except Si model, Reading and Clearing Diagnostic Trouble Codes Si model. Reading and Clearing Diagnostic Trouble Codes

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.


6. Test-drive the vehicle.

Does the speedometer work?
YES - Go to step 10.

NO - Go to step 7.


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

8. Disconnect the TPMS control unit 20P connector.

9. Test-drive the vehicle.

Does the speedometer work?
YES - Check for loose terminals and poor connections at the TPMS control unit If necessary, substitute a known-good TPMS control unit, Service and Repair and recheck.

NO - Turn the ignition switch to LOCK (0), and reconnect all connectors, then check and troubleshoot the fuel and emissions systems: Except Si model, Reading and Clearing Diagnostic Trouble Codes Si model. Reading and Clearing Diagnostic Trouble Codes


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

11. Short the SCS line with the HDS.

12. Disconnect ECM/PCM connector A (44P).

13. Disconnect the TPMS control unit 20P connector.

14. Check for continuity between the TPMS control unit 20P connector terminals and the ECM/PCM connector A (44P) terminals according to the table.





Is there continuity?
YES - Check for loose terminals and poor connections at the TPMS control unit and G504 If necessary, substitute a known-good TPMS control unit, Service and Repair and recheck.

NO - Repair an open in the wire between the TPMS control unit and the ECM/PCM.