VSA System

VSA DTC Troubleshooting: 25

DTC 25: Yaw Rate Sensor

NOTE: If DTC 27 or 64 is stored at the same time as DTC 25, troubleshoot those DTCs first, then recheck for DTC 25.

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

2. Clear the DTC with the HDS. Initial Inspection and Diagnostic Overview

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

4. Test-drive the vehicle around a number of corners.

5. Check for DTCs with the HDS.

Is DTC 25 indicated?
YES - Go to step 6.

NO - The system is OK at this time. Check for loose terminals or poor connections.


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

7. Disconnect the VSA modulator-control unit 47P connector and yaw rate-lateral/longitudinal acceleration sensor 5P connector.

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

9. Measure the voltage between body ground and the VSA modulator-control unit 47P connector terminals No. 33, No. 34, and No. 35 individually.

Is there 0.1 V or more?
YES - Repair short to power in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.

NO - Go to step 10.






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

11. Check for continuity between body ground and the VSA modulator-control unit 47P connector terminals No. 33, No. 34, and No. 35 individually.

Is there continuity?
YES - Repair short to body ground in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.

NO - Go to step 12.






12. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 35 and yaw rate-lateral/longitudinal acceleration sensor 5P connector terminal No. 2.

Is there continuity?
YES - Go to step 13.

NO - Repair open in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.






13. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 33 and yaw rate-lateral/longitudinal acceleration sensor 5P connector terminal No. 4.

Is there continuity?
YES - Go to step 14.

NO - Repair open in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.






14. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 34 and yaw rate-lateral/longitudinal acceleration sensor 5P connector terminal No. 3.

Is there continuity?
YES - Go to step 15.

NO - Repair open in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.






15. Substitute a known-good yaw rate-lateral/longitudinal acceleration sensor.

16. Reconnect all of the disconnected connectors.

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

18. Clear the DTC with the HDS. Initial Inspection and Diagnostic Overview

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

20. Test-drive the vehicle around a number of corners.

21. Check for DTCs with the HDS.

Is DTC 25 indicated?
YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit, Service and Repair and recheck.

NO - Replace the original yaw rate-lateral/longitudinal acceleration sensor. Service and Repair