DTC Troubleshooting: 12, 14, 16, 18
DTC 12, 14, 16, 18:
 Wheel Speed Sensor (Electrical Noise/Intermittent Interruption)
NOTE: If the ABS and the VSA indicators come on because of electrical noise, the indicator goes off when you test-drive the vehicle at 15 km/h (9 mph).
  1. Turn the ignition switch to LOCK (0).
  1. Check that the appropriate wheel speed sensor is properly mounted.
    DTC
    Appropriate Wheel Speed Sensor
    12
    Right-front
    14
    Left-front
    16
    Right-rear
    18
    Left-rear

Is the wheel speed sensor installation OK?
YES -
Go to Step 3 .
NO -
Reinstall the wheel speed sensor, and check the mounting position. ■
  1. Inspect the appropriate magnetic encoder.
    DTC
    Appropriate Magnetic Encoder
    Note
    12
    Right-front
    Remove the driveshaft outboard joint from the appropriate wheel hub.
    14
    Left-front
    16
    Right-rear
    Remove the hub bearing unit.
    18
    Left-rear

Is the magnetic encoder OK?
YES -
Go to Step 4 .
NO -
Replace the wheel bearing (front) or the hub bearing unit (rear):■
  • Front: Replace the front wheel bearing.
  • Rear: Replace the rear hub bearing unit.
  1. Disconnect the VSA modulator-control unit 47P connector.
  1. Check for continuity between the appropriate wheel speed sensor GND terminal and other wheel speed sensor GND terminals of the VSA modulator-control unit 47P connector (see table).
    DTC
    Appropriate Terminal
    Other Terminals
    12
    FR-GND:
    No. 33
    No. 46
    No. 42
    No. 37
    14
    FL-GND:
    No. 46
    No. 33
    No. 42
    No. 37
    16
    RR-GND:
    No. 42
    No. 33
    No. 46
    No. 37
    18
    RL-GND:
    No. 37
    No. 33
    No. 46
    No. 42

Is there continuity?
YES -
Repair short in the wires between the appropriate wheel speed sensor and the other wheel speed sensor.■
NO -
Go to Step 6 .
  1. Substitute a known-good wheel speed sensor.
  1. Reconnect all connectors.
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Test-drive the vehicle. Drive the vehicle at 30 km/h (19 mph) 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, 14, 16, and/or 18 indicated?
YES -
Go to Step 12 .
NO -
Replace the original wheel speed sensor. ■
  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. Drive the vehicle at 30 km/h (19 mph) 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, 14, 16, and/or 18 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.■