DTC 121

DTC 121: VSA Solenoid
1. Clear the DTC using the HDS.
2. Disconnect the HDS from the 16P DLC.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle.
Does the VSA indicator come on, and is DTC 121, 122, 123, or 124 indicated?
YES - Check for loose terminals in the VSA control unit 47P connector. If necessary, substitute a known-good VSA modulator-control unit, and recheck.
NO - Intermittent failure; the system is OK at this time.