DTC 84-21

DTC 84-21: VSA Sensor Neutral Position not Writing
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Do the VSA sensor neutral position memorization. Programming and Relearning
4. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
5. Check for DTCs with the HDS.

Is DTC 84-21 indicated?

YES - Check for loose terminals in the VSA modulator-control unit 37P connector. If necessary, substitute a known-good VSA modulator-control unit, and retest.

NO - The system is OK at this time.