VSA System

VSA DTC Troubleshooting: 25, 26, 28

DTC 25:

Yaw Rate Sensor Malfunction

DTC 26:

Lateral Acceleration Sensor Malfunction

DTC 28:

Longitudinal Acceleration Sensor Malfunction

NOTE:

- These code(s) will set after a test drive if the sensor is installed incorrectly.
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

1. Turn the ignition switch to ON (II).

2. Check for DTCs with the HDS.

Is DTC 86 indicated with DTC 25, 26, or 28 at the same time?

YES -

Do the DTC 86 troubleshooting 86.

NO -

Go to step 3.

3. Turn the ignition switch to LOCK (0).

4. Substitute a known-good yaw rate-lateral/longitudinal acceleration sensor Service and Repair.

5. Turn the ignition switch to ON (II).

6. Clear the DTC with the HDS.

7. Test-drive the vehicle. Drive the vehicle at 19 mph(30 km/h) or more, and go a distance of 985 ft (300 m) or more.

8. Check for DTCs with the HDS.

Is DTC 25, 26, or 28 indicated?

YES -

Go to step 9.

NO -

Replace the original yaw rate-lateral/longitudinal acceleration sensor Service and Repair.�

9. Update the VSA modulator-control unit if it does not have the latest software Testing and Inspection. If the unit already has the latest software, substitute a known-good VSA modulator-control unit Service and Repair.

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

11. Test-drive the vehicle. Drive the vehicle at 19 mph(30 km/h) or more, and go a distance of 985 ft (300 m) or more.

12. Check for DTCs with the HDS.

Is DTC 25, 26, or 28 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 46P connector. Check for a loose connection at G303. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit Service and Repair, 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 Service and Repair. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.�