VSA System

Control System DTCs

VSA DTC Troubleshooting: 86-14

DTC 86-14 : F-CAN Communication With Gauge Control Module 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. DTC check:

DTC check
-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 86-14 indicated?
-YES- If DTC 86-14 is only indicated, go to step 2.
-YES- If DTC 86-11 is also indicated, go to DTC 86-11 VSA System.
-NO- Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting.

2. Gauge control module (tach) check:

Gauge control module (tach) check
-1. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

Do the gauge indicators come on?
-YES- Go to step 3.
-NO- Do the gauge control module self-diagnostic function Testing and Inspection.

3. 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. Disconnect the following connectors.





-3. 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 4.
-NO- Repair an open in the wire between the gauge control module (tach) and the VSA modulator-control unit.

4. Gauge control module (tach) check (substitution):

Gauge control module (tach) check (substitution)
-1. Substitute a known-good gauge control module (tach) Gauge Control Module (Tach) Removal and Installation.

-2. Reconnect the following connectors.





-3. Turn the ignition switch to ON (II).

-4. Clear the DTC with the HDS.

-5. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

-6. Check for DTCs with the HDS.

Is DTC 86-14 indicated?
-YES- Go to step 5.
-NO- Replace the original gauge control module (tach) Gauge Control Module (Tach) Removal and Installation.

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

VSA modulator-control unit check (update)
-1. Update the VSA modulator-control unit if it does not have the latest software Programming and Relearning.

-2. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

-3. Check for DTCs with the HDS.

Is DTC 86-14 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.