VSA System

Control System DTCs

VSA DTC Troubleshooting: 86-11

DTC 86-11 : F-CAN Bus-Off Malfunction

NOTE:
* Troubleshoot and repair any fuel and emissions DTCs first.
* 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. Problem verification:

Problem verification
-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 86-11 indicated?
-YES- The failure is duplicated. Go to step 2.
-NO- Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting.

2. Open wire check (F_CAN-L, F_CAN-H lines):

Open wire check (F_CAN-L, F_CAN-H lines)
-1. Turn the ignition switch to LOCK (0).

-2. Short the SCS line with the HDS.

-3. Disconnect the following connectors.





-4. Check for continuity between test points 1 and 2.














Is there continuity?
-YES- The F_CAN-L, F_CAN-H wires are OK. Go to step 3.
-NO- Repair an open in the wire between the ECM/PCM and the VSA modulator-control unit.

3. VSA modulator-control unit check (update):

VSA modulator-control unit check (update)
-1. Reconnect the following connectors.





-2. Update the VSA modulator-control unit if it does not have the latest software Programming and Relearning.

-3. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

-4. Check for DTCs with the HDS.

Is DTC 86-11 indicated?
-YES- Check for loose terminals in the VSA modulator-control unit 22P 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- Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.