86-1

VSA DTC Troubleshooting: 86

DTC 86:

F-CAN Communication Malfunction

NOTE: 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), or press the engine start/stop button to select the ON mode.

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

4. Start and run the engine for at least 5 seconds.

5. Check for DTCs with the HDS.

Is DTC 86 indicated?

YES -

Go to step 6.

NO -

Check the COMMU FI ECU, COMMU A/T (A/T), COMMU GAUGE, COMMU YAW RATE/G, COMMU STEERING ANGLE S (With SH-AWD), and COMMU 4WD (With SH-AWD) in the VSA FREEZE DATA with the HDS. Then check for F-CAN communication lines continuity to the appropriate system or sensor and loose terminals in the appropriate system or sensor connectors.

6. Check the COMMU FI ECU, COMMU A/T (A/T), COMMU GAUGE, COMMU YAW RATE/G, COMMU STEERING ANGLE S (With SH-AWD), and COMMU 4WD (With SH-AWD) in the VSA DATA LIST with the HDS.

Is there a communication error in the system or sensor?

YES -

Go to step 7.

NO -

Go to step 24.

7. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

8. Short the SCS line with the HDS.

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

10. Disconnect the VSA modulator-control unit 47P connector.

11. Disconnect the gauge control module 32P connector Service and Repair.

12. Disconnect the yaw rate-acceleration sensor 4P connector Service and Repair.

13. With SH-AWD: Disconnect the steering angle sensor 5P connector Service and Repair.

14. With SH-AWD: Disconnect SH-AWD control unit connector A (20P) Service and Repair.

15. Check the F-CAN communication lines for continuity between the VSA modulator-control unit and the appropriate system or sensor (see table).

With SH-AWD:

Is there continuity on the F-CAN communication lines?

YES -

- If the appropriate system or sensor is the yaw rate-acceleration sensor: Go to step 16.
- If the appropriate system or sensor is not the yaw rate-acceleration sensor: Go to step 20.

NO -

Repair an open in the appropriate wire.

16. Check for loose terminals in the yaw rate-acceleration sensor 4P connector.

Is the yaw rate-acceleration sensor 4P connector OK?

YES -

Go to step 17.

NO -

Repair or reconnect the connector securely.

17. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

18. Measure the voltage between yaw rate-acceleration sensor 4P connector terminals No. 1 and No. 4.

Is there battery voltage?

YES -

Replace the yaw rate-acceleration sensor Service and Repair.

NO -

Go to step 19.

19. Measure the voltage between yaw rate-acceleration sensor 4P connector terminal No. 1 and body ground.

Is there battery voltage?

YES -

Repair an open in the wire between the yaw rate-acceleration sensor and body ground (G403).

NO -

Repair an open in the wire between the yaw rate-acceleration sensor and the driver's under-dash fuse/relay box.

20. Check for loose terminals in the appropriate system connectors.

Are the appropriate system connectors OK?

YES -

Go to step 21.

NO -

Repair or reconnect the connector securely.

21. Reconnect all connectors.

22. Start and run the engine for at least 5 seconds.

23. Check for other system DTCs with the HDS.

Is another DTCs indicated?

YES -

Do the appropriate DTC troubleshooting.

NO -

Go to step 24.

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

25. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

26. Start and run the engine for at least 5 seconds.

27. Check for DTCs with the HDS.

Is DTC 86 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 47P 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.