86-13

VSA DTC Troubleshooting: 86-12, 86-13

DTC 86-12:

F-CAN Communication With ECM/PCM (Engine) Malfunction

DTC 86-13:

F-CAN Communication With PCM (A/T) Malfunction

NOTE:

- Troubleshoot any PGM F-I DTCs first.
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information 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).

4. Test-drive the vehicle at 6 mph(10 km/h) or more.

NOTE: Drive the vehicle on the road, not on a lift.

5. Check for DTCs with the HDS.

Is DTC 86-12 or 86-13 indicated?

YES -

If DTC 86-11 is indicated at the same time, do the DTC 86-11 troubleshooting first 86-11. If DTC 86-11 is not indicated, go to step 6.

NO -

If any other DTCs are indicated, go to the indicated DTCs troubleshooting. If DTCs are not indicated, intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting.

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

7. Short the SCS line with the HDS.

8. Disconnect ECM/PCM connector A (49P) Service and Repair.

9. Disconnect the VSA modulator-control unit 36P connector.

10. Check for continuity between the VSA modulator-control unit 36P connector terminal and ECM/PCM connector A (49P) terminal (see table).









Is there continuity?

YES -

Go to step 11.

NO -

Repair an open in the wire between the ECM/PCM and the VSA modulator-control unit.

11. Reconnect all connectors.

12. Update the ECM/PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM/PCM.

13. Clear the DTC with the HDS.

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

15. Test-drive the vehicle at 6 mph (10 km/h) or more.

NOTE: Drive the vehicle on the road, not on a lift.

16. Check for DTCs with the HDS.

Is DTC 86-12 or 86-13 indicated?

YES -

Go to step 17.

NO -

If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM Service and Repair.

17. Update the VSA modulator-control unit if it does not have the latest software Testing and Inspection.

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

19. Test-drive the vehicle at 6 mph (10 km/h) or more.

NOTE: Drive the vehicle on the road, not on a lift.

20. Check for DTCs with the HDS.

Is DTC 86-12 or 86-13 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 36P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit Service and Repair.

NO -

If the VSA modulator-control unit was updated, troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.