Manufacturer Code Charts: 86

VSA DTC Troubleshooting: 86

DTC 86: F-CAN Communication

NOTE: Troubleshoot fuel and emissions DTC's first.

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

2. Clear the DTC with the HDS.

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

4. Check for DTCs with the HDS.

Is DTC 86 indicated?
YES - Go to step 5.

NO - Check the COMMU FI ECU, COMMU A/T, COMMU GAUGE, and COMMU YAW RATE/G 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.


5. Check the COMMU FI ECU, COMMU A/T, COMMU GAUGE, and COMMU YAW RATE/G in the VSA DATA LIST with the HDS.

Is there communication error in the system or sensor?
YES - Go to step 6.

NO - Go to step 15.


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

7. Short the SCS line with the HDS.

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

9. Disconnect the VSA modulator-control unit 47P connector. Service and Repair

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

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

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





Do the F-CAN communication lines have continuity?
YES - Go to step 13.

NO - Repair an open in the appropriate wire.














13. Check for loose terminals in the appropriate system or sensor connectors.

Are the appropriate system or sensor connectors OK?
YES - Go to step 14.

NO - Repair or reconnect the connector securely.


14. Check for other system or sensor DTCs with the HDS.

Is another DTC indicated?
YES - Do the appropriate DTC troubleshooting.

NO - Go to step 15.


15. Update the VSA modulator-control unit if it does not have the latest software. Testing and Inspection If the unit already has the latest software, substitute a known-good VSA modulator-control unit. Service and Repair

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

17. 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, substitute a known-good VSA modulator-control unit, Service and Repair then retest. If the VSA modulator-control unit was substituted, go to step 1.

NO - If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit. Service and Repair If any other DTCs are indicated, go to the indicated DTCs troubleshooting.