VSA System

Control System DTCs

VSA DTC Troubleshooting: 81-15, 81-16, 81-17, 81-18

DTC 81-15 : Right-Front Wheel Speed Sensor Short to Power
DTC 81-16 : Left-Front Wheel Speed Sensor Short to Power
DTC 81-17 : Right-Rear Wheel Speed Sensor Short to Power
DTC 81-18 : Left-Rear Wheel Speed Sensor Short to Power

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. 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).

-4. Test-drive the vehicle.
NOTE: Drive the vehicle on the road, not on a lift.

-5. Check for DTCs with the HDS.

Is DTC 81-15, 81-16, 81-17, or 81-18 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. Shorted wire check (Wheel speed sensor lines to power):

Shorted wire check (Wheel speed sensor lines to power)
-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.





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

-4. Measure the voltage between body ground and the appropriate VSA modulator-control unit 22P connector terminals (see table).














Is there 0.1 V or more?
-YES- Repair a short to power in the wire between the appropriate wheel speed sensor and the VSA modulator-control unit.
-NO- The wheel speed sensor wires are OK. Go to step 3.

3. Wheel speed sensor check (substitution):

Wheel speed sensor check (substitution)
-1. Turn the ignition switch to LOCK (0).

-2. Reconnect the following connector.





-3. Substitute a known-good front wheel speed sensor Front Wheel Speed Sensor Removal and Installation or rear wheel speed sensor Rear Wheel Speed Sensor Removal and Installation.





-4. Turn the ignition switch to ON (II).

-5. Clear the DTC with the HDS.

-6. Turn the ignition switch to LOCK (0).

-7. Test-drive the vehicle.
NOTE: Drive the vehicle on the road, not on a lift.

-8. Check for DTCs with the HDS.

Is DTC 81-15, 81-16, 81-17, or 81-18 indicated?
-YES- Go to step 4.
-NO- Replace the original front wheel speed sensor Front Wheel Speed Sensor Removal and Installation or rear wheel speed sensor Rear Wheel Speed Sensor Removal and Installation.

4. 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).

-3. Test-drive the vehicle.
NOTE: Drive the vehicle on the road, not on a lift.

-4. Check for DTCs with the HDS.

Is DTC 81-15, 81-16, 81-17, or 81-18 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.