VSA DTC Troubleshooting: 12-120, 14-120, 16-120, 18-120
DTC 12-120: Right-Front Wheel Speed Sensor Circuit Malfunction
DTC 14-120: Left-Front Wheel Speed Sensor Circuit Malfunction
DTC 16-120: Right-Rear Wheel Speed Sensor Circuit Malfunction
DTC 18-120: Left-Rear Wheel Speed Sensor Circuit Malfunction
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

DTC Description
DTC
Freeze Frame
12-120 Right-Front Wheel Speed Sensor Circuit Malfunction
    
14-120 Left-Front Wheel Speed Sensor Circuit Malfunction
    
16-120 Right-Rear Wheel Speed Sensor Circuit Malfunction
    
18-120 Left-Rear Wheel Speed Sensor Circuit Malfunction
    

1.
Problem verification:

Problem verification
?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?4.
Test-drive the vehicle.
NOTE: Drive the vehicle on the road, not on a lift.

?5.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
12-120 Right-Front Wheel Speed Sensor Circuit Malfunction
    
14-120 Left-Front Wheel Speed Sensor Circuit Malfunction
    
16-120 Right-Rear Wheel Speed Sensor Circuit Malfunction
    
18-120 Left-Rear Wheel Speed Sensor Circuit Malfunction
    

Is DTC 12-120, 14-120, 16-120, or 18-120 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting.?
2.
Shorted wire check (Wheel speed sensor lines to power):

Shorted wire check (Wheel speed sensor lines to power)
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?4.
Measure the voltage between body ground and the appropriate wheel speed sensor ?B terminals of the VSA modulator-control unit 21P connector individually (see table).
Test condition
IG ON (II) or ON mode
 
VSA modulator-control unit 21P connector: disconnected

DTC
VSA Modulator-Control Unit 21P Connector Terminal
Appropriate Wheel Speed Sensor 2P Connector Terminal
12-120
No. 14
Right-front
14-120
No. 12
Left-front
16-120
No. 11
Right-rear
18-120
No. 13
Left-rear


Is there 0.1 V or more?

     
YES
     
     
     
Repair a short to power in the wire between the appropriate wheel speed sensor and the VSA modulator-control unit.?
     
NO
     
     
     
The wheel speed sensor wires are not shorted to power. Go to step 3.
3.
Wheel speed sensor check (substitution):

Wheel speed sensor check (substitution)
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Reconnect the following connector.

?3.
Substitute a known-good wheel speed sensor.
DTC
Appropriate Wheel
Speed Sensor
12-120
Right-front
14-120
Left-front
16-120
Right-rear
18-120
Left-rear

?4.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?5.
Clear the DTC with the HDS.


?6.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?7.
Test-drive the vehicle.
NOTE: Drive the vehicle on the road, not on a lift.

?8.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
12-120 Right-Front Wheel Speed Sensor Circuit Malfunction
    
14-120 Left-Front Wheel Speed Sensor Circuit Malfunction
    
16-120 Right-Rear Wheel Speed Sensor Circuit Malfunction
    
18-120 Left-Rear Wheel Speed Sensor Circuit Malfunction
    

Is DTC 12-120, 14-120, 16-120, or 18-120 indicated?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
4.
VSA modulator-control unit check (update):

VSA modulator-control unit check (update)
?1.
Update the VSA modulator-control unit if it does not have the latest software.

?2.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?3.
Test-drive the vehicle.
NOTE: Drive the vehicle on the road, not on a lift.

?4.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
     

Is DTC 12-120, 14-120, 16-120, or 18-120 indicated?

     
YES
     
     
     
Check for loose terminals in the VSA modulator-control unit 21P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit.?
     
NO
     
     
     
Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.?