Manufacturer Code Charts: 86
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).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0).
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, 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.�
6. 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 a communication error in the system or sensor?
YES -
Go to step 7.
NO -
Go to step 22.
7. Turn the ignition switch to LOCK (0).
8. Short the SCS line with the HDS.
9. Disconnect 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. Check the F-CAN communication lines for continuity between the VSA modulator-control unit and the appropriate system or sensor (see table).
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 14.
- If the appropriate system or sensor is not the yaw rate-acceleration sensor: Go to step 18.
NO -
Repair an open in the appropriate wire.�
14. 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 15.
NO -
Repair or reconnect the connector securely.�
15. Turn the ignition switch to ON (II).
16. 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 17.
17. 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 (G503).�
NO -
Repair an open in the wire between the yaw rate-acceleration sensor and the driver's under-dash fuse/relay box.�
18. Check for loose terminals in the appropriate system connectors.
Are the appropriate system connectors OK?
YES -
Go to step 19.
NO -
Repair or reconnect the connector securely.�
19. Reconnect all connectors.
20. Start and run the engine for at least 5 seconds.
21. Check for other system DTCs with the HDS.
Is another DTC indicated?
YES -
Do the appropriate DTC troubleshooting.�
NO -
Go to step 22.
22. 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.
23. Turn the ignition switch to LOCK (0).
24. Start and run the engine for at least 5 seconds.
25. 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.�