DTC 81-19: Yaw Rate Sensor (Inside of Modulator-Control Unit) Internal Circuit Malfunction; DTC 81-20: Acceleration Sensor (Inside of Modulator-Control Unit) Internal Circuit Malfunction
NOTE:
- BEFORE YOU TROUBLESHOOT, RECORD ALL FREEZE DATA AND ANY ON-BOARD SNAPSHOT, AND REVIEW THE HOW TO TROUBLESHOOT THE VSA SYSTEM .
- The yaw rate-acceleration sensor is built into the VSA modulator-control unit.
- Before troubleshooting, check the VSA modulator-control unit for proper mounting. If not properly installed the VSA modulator-control unit may set these codes.
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| 81-19 Yaw Rate Sensor (Inside of Modulator-Control Unit) Internal Circuit Malfunction | ||
| 81-20 Acceleration Sensor (Inside of Modulator-Control Unit) Internal Circuit Malfunction |
- 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.
DTC Description DTC Freeze Frame 81-19 Yaw Rate Sensor (Inside of Modulator-Control Unit) Internal Circuit Malfunction 81-20 Acceleration Sensor (Inside of Modulator-Control Unit) Internal Circuit Malfunction
Is DTC 81-19 or 81-20 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.
- VSA modulator-control unit check (update):
- 1. Update the VSA modulator-control unit if it does not have the latest software See VSA MODULATOR-CONTROL UNIT UPDATE , VSA SENSOR NEUTRAL POSITION MEMORIZATION or VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION .
- 2. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
- 3. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame
Is DTC 81-19 or 81-20 indicated?
YES : Check for loose terminals in the VSA modulator-control unit 38P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit See VSA SENSOR NEUTRAL POSITION MEMORIZATION , VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION or VSA MODULATOR-CONTROL UNIT UPDATE .
NO : Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.