DTC 86-01

DTC 86-01: F-CAN Bus-off Malfunction

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 it to ON (II) again.
4. Check for DTCs with the HDS.

Is DTC 86-01 indicated?

YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for loose terminals between ECM/PCM connector A (49P) and the VSA modulator-control unit 36P connector. Refer to intermittent failures troubleshooting.

5. Turn the ignition switch to LOCK (0).
6. Short the SCS line with the HDS.
7. Disconnect ECM/PCM connector A (49P).
8. Disconnect the VSA modulator-control unit 36P connector.
9. Check for continuity between VSA modulator control unit 36P connector terminal and ECM/PCM connector A (49P) terminal (see table).





Is there continuity?

YES - Go to step 10.

NO - Repair open in the wire between the ECM/PCM and the VSA modulator-control unit.

10. Reconnect all connectors.
11. Update the VSA modulator-control unit if it does not have the latest software. If the unit already has the latest software, substitute a known-good VSA modulator-control unit.
12. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
13. Check for DTCs with the HDS.

Is DTC 86-01 indicated?

YES - Check for loose terminals in the VSA modulator-control unit 36P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit, 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. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.