DTC 121-XX*
DTC 121-xx*: VSA Solenoid Valve MalfunctionDTC 122-xx*: VSA Solenoid Valve Malfunction
DTC 123-xx*: VSA Solenoid Valve Malfunction
DTC 124-xx*: VSA Solenoid Valve Malfunction
*: Any two-character subcode (see table)
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.
Is DTC 121-xx, 122-xx, 123-xx, or 124-xx indicated?
YES - Go to step 5.
NO - Intermittent failure, the system is OK at this time.
5. Update the VSA modulator-control unit if it does not have the latest software. If the unit already has the latest software, substitute a known-good VSA modulator control unit.
6. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
7. Check for DTCs with the HDS.
Is DTC 121-xx, 122-xx, 123-xx, or 124-xx indicated?
YES - Check for loose terminals in the VSA modulator-control unit 36P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit, 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. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.