( TF09E00K801000R1212FAAT00 )
VSA DTC Troubleshooting: 12-12, 14-12, 16-12, 18-12
DTC 12-12:
 Right-front Wheel Speed Sensor Short to the Other Sensor Circuit
DTC 14-12:
 Left-front Wheel Speed Sensor Short to the Other Sensor Circuit
DTC 16-12:
 Right-rear Wheel Speed Sensor Short to the Other Sensor Circuit
DTC 18-12:
 Left-rear Wheel Speed Sensor Short to the Other Sensor Circuit
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Test-drive the vehicle. Drive the vehicle at 20 km/h (13 mph) or more, and go a distance of 100 m (328 ft) or more.
    NOTE: Drive the vehicle on a straight section of road, not on a lift.
  1. Check for DTCs with the HDS.
Is DTC 12-12, 14-12, 16-12, and/or 18-12 indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure, the system is OK at this time. Check for loose terminals between the wheel speed sensor 2P connector and the VSA modulator-control unit 36P connector. Refer to intermittent failures troubleshooting. ■
  1. Turn the ignition switch to LOCK (0).
  1. Check for continuity between the appropriate VSA modulator-control unit 36P connector wheel speed sensor GND terminals (see table).
    DTC
    VSA Modulator-control Unit 36P Connector Terminal
    Appropriate Terminal
    Other Terminals
    12-12
    No. 10
    No. 6
    No. 4
    No. 8
    14-12
    No. 6
    No. 10
    No. 4
    No. 8
    16-12
    No. 4
    No. 10
    No. 6
    No. 8
    18-12
    No. 8
    No. 10
    No. 6
    No. 4

Is there continuity?
YES -
Repair short in the wires between the appropriate wheel speed sensor and the VSA modulator-control unit.■
NO -
Go to Step 8 .
  1. Reconnect the VSA modulator-control unit 36P connector.
  1. Test-drive the vehicle. Drive the vehicle at 20 km/h (13 mph) or more, and go a distance of 100 m (328 ft) or more.
    NOTE: Drive the vehicle on a straight section of road, not on a lift.
  1. Check for DTCs with the HDS.
Is DTC 12-12, 14-12, 16-12, and/or 18-12 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.■