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 connector A (44P) and the VSA modulator-control unit 37P 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 connector A (44P).
8. Disconnect the HDS from the data link connector (DLC).
9. Disconnect the gauge control module (tach) 36P connector.
10. Disconnect SRS unit connector A (28P).
11. Disconnect EPS unit connector D (28P).
12. With TPMS: Disconnect the TPMS control unit 20P connector.
13. Disconnect the yaw rate-lateral acceleration sensor 5P connector.
14. Disconnect the VSA modulator-control unit 37P connector.
15. Check for continuity between body ground and VSA modulator-control unit 37P connector terminals No. 1 and No. 15 individually.





Is there continuity?

YES - Repair short to body ground in the wire between the ECM, the gauge control module (tach), the data link connector (DLC), the SRS unit, the EPS control unit, the TPMS control unit (if equipped), the yaw rate-lateral acceleration sensor, and the VSA modulator-control unit.

NO - Go to step 16.

16. Check for continuity between VSA modulator-control unit 37P connector terminals No. 1 and No. 15.





Is there continuity?

YES - Repair short in the wires between VSA modulator-control unit 37P connector terminals No. 1 (CAN-L line) and No. 15 (CAN-H line).

NO - Go to step 17.

17. Check for continuity between the VSA modulator-control unit 37P connector terminal and ECM connector A (44P) terminal (see table).





Is there continuity?

YES - Check for loose terminals in the VSA modulator-control unit 37P connector. If necessary, substitute a known-good VSA modulator-control unit, and retest.

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