( TL19E00K8010008A210FAAT00 )

DTC Troubleshooting: 121, 122, 123, 124

DTC 121, 122, 123, 124:
VSA Solenoid

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

1. Clear the DTC with the HDS.

1. Test-drive the vehicle.
   NOTE: Drive the vehicle on a straight section of road, not on a lift.

1. Check for DTCs with the HDS.

Is DTC 121, 122, 123, or 124 indicated?

YES | - | Go to Step 5 .
NO | - | Intermittent failure, the system is OK at this time.■

1. 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.

1. Test-drive the vehicle.
   NOTE: Drive the vehicle on a straight section of road, not on a lift.

1. Check for DTCs with the HDS.

Is DTC 121, 122, 123, or 124 indicated?

YES | - | Check for loose terminals in the VSA modulator-control unit 47P 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.■