DTC C0031-3A: Wheel Speed Sensor (Left Front) Signal Failure (Signal Frequency is Too High); DTC C0034-3A: Wheel Speed Sensor (Right Front) Signal Failure (Signal Frequency is Too High); DTC C0037-3A: Wheel Speed Sensor (Left Rear) Signal Failure (Signal Frequency is Too High); DTC C003A-3A: Wheel Speed Sensor (Right Rear) Signal Failure (Signal Frequency is Too High)

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• If the ABS and other indicators come on because of electrical noise, the indicators will go off when you test-drive the vehicle speed at 9 mph (15 km/h) or more and the noise is gone.

DTCs (VSA)

1. Problem verification:

   - 1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   - 3. Turn the vehicle to the OFF (LOCK) mode, then start the engine.

   - 4. Test-drive the vehicle for 80 seconds or more.

   NOTE:  Drive the vehicle on the road, not on a lift.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   C0031-3A Wheel Speed Sensor (Left Front) Signal Failure (Signal Frequency is Too High)
   C0034-3A Wheel Speed Sensor (Right Front) Signal Failure (Signal Frequency is Too High)
   C0037-3A Wheel Speed Sensor (Left Rear) Signal Failure (Signal Frequency is Too High)
   C003A-3A Wheel Speed Sensor (Right Rear) Signal Failure (Signal Frequency is Too High)

   Is DTC C0031-3A, C0034-3A, C0037-3A, or C003A-3A 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 . If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the Freeze data/on-board snapshot.

2. Wheel speed sensor installation check:

   - 1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Check that the appropriate wheel speed sensor is properly mounted .

   DTC	Appropriate Wheel Speed Sensor
   C0031-3A	Left-front
   C0034-3A	Right-front
   C0037-3A	Left-rear
   C003A-3A	Right-rear

   Is the wheel speed sensor installation OK?

   YES 

   Go to step 3.

   NO 

   Reinstall the wheel speed sensor , and recheck its mounting position, then go to step 1.

3. Wheel speed sensor check (substitution):

   - 1. Substitute a known-good wheel speed sensor .

   DTC	Appropriate Wheel Speed Sensor
   C0031-3A	Left-front
   C0034-3A	Right-front
   C0037-3A	Left-rear
   C003A-3A	Right-rear

   - 2. Turn the vehicle to the ON mode.

   - 3. Clear the DTC with the HDS.

   Clear DTCs

   - 4. Turn the vehicle to the OFF (LOCK) mode, then start the engine.

   - 5. Test-drive the vehicle for 80 seconds or more.

   NOTE:  Drive the vehicle on the road, not on a lift.

   - 6. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   C0031-3A Wheel Speed Sensor (Left Front) Signal Failure (Signal Frequency is Too High)
   C0034-3A Wheel Speed Sensor (Right Front) Signal Failure (Signal Frequency is Too High)
   C0037-3A Wheel Speed Sensor (Left Rear) Signal Failure (Signal Frequency is Too High)
   C003A-3A Wheel Speed Sensor (Right Rear) Signal Failure (Signal Frequency is Too High)

   Is DTC C0031-3A, C0034-3A, C0037-3A, or C003A-3A indicated?

   YES 

   Go to step 4.

   NO 

   Replace the original wheel speed sensor .

4. Magnetic encoder check:

   - 1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Inspect the appropriate magnetic encoder for damage, debris, and correct installation.

   DTC	Appropriate Magnetic Encoder	Note
   C0031-3A	Left-front	Remove the driveshaft outboard joint from the appropriate wheel hub .
   C0034-3A	Right-front

   DTC	Appropriate Magnetic Encoder	Note
   C0037-3A	Left-rear	Remove the hub bearing unit .
   C003A-3A	Right-rear

   Is the magnetic encoder surface OK?

   YES 

   Go to step 5.

   NO 

   Clean the debris from the appropriate magnetic encoder surface on the wheel bearing or the hub bearing unit. If the debris cannot be removed or the encoder is damaged, replace the appropriate wheel bearing or the hub bearing unit . Then recheck for DTCs. If the DTC is still present go to step 5.

5. VSA modulator-control unit check (update):

   - 1. Update the VSA modulator-control unit if it does not have the latest software .

   - 2. Turn the vehicle to the OFF (LOCK) mode, then start the engine.

   - 3. Test-drive the vehicle for 80 seconds or more.

   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 C0031-3A, C0034-3A, C0037-3A, or C003A-3A indicated?

   YES 

   Check for loose terminals and poor connections in the VSA modulator-control unit 38P 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.