DTC C1041-00; DTC C1042-00; DTC C1043-00; DTC C1044-00: Wheel Abnormal Slip Detection

NOTE: Before you troubleshoot, review the general troubleshooting information .

• 1. Tire check:

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

  2. Check all four tires for size, inflation, and wear .

  Are all four tires the correct size, properly inflated, and worn evenly?

  YES 

  Go to step 2.

  NO 

  Swap the wheels and tires with a known-good set (the correct size, type, and properly inflated), then retest-drive the vehicle.

• 2. 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 at 12 mph (20 km/h) or more for 72 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
  C1041-00 Right Front Wheel Abnormal Slip Detection
  C1042-00 Left Front Wheel Abnormal Slip Detection
  C1043-00 Right Rear Wheel Abnormal Slip Detection
  C1044-00 Left Rear Wheel Abnormal Slip Detection

  Is DTC C1041-00, C1042-00, C1043-00, or C1044-00 indicated?

  YES 

  The failure is duplicated. Go to step 3.

  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.

• 3. Wheel speed sensor performance check:

  1. Test-drive the vehicle at 12 mph (20 km/h) or more in a straight line.

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

  2. Check the parameter(s) below with the HDS.

  Signal	Current conditions
  	Values	Unit
  RIGHT FRONT WHEEL SPEED
  LEFT FRONT WHEEL SPEED
  RIGHT REAR WHEEL SPEED
  LEFT REAR WHEEL SPEED

  Is any one of the four values different?

  YES 

  Go to step 4.

  NO 

  Go to step 6.

• 4. Wheel speed sensor check (substitution):

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

  2. Substitute a known-good wheel speed sensor .

  3. Turn the vehicle to the ON mode.

  4. Clear the DTC with the HDS.

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

  6. Test-drive the vehicle at 12 mph (20 km/h) or more for 72 seconds or more.

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

  7. Check for DTCs with the HDS.

  DTC Description	DTC	Freeze Frame
  C1041-00 Right Front Wheel Abnormal Slip Detection
  C1042-00 Left Front Wheel Abnormal Slip Detection
  C1043-00 Right Rear Wheel Abnormal Slip Detection
  C1044-00 Left Rear Wheel Abnormal Slip Detection

  Is DTC C1041-00, C1042-00, C1043-00, or C1044-00 indicated?

  YES 

  Go to step 5.

  NO 

  Replace the original wheel speed sensor .

• 5. Magnetic encoder check:

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

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

  • Front: Remove the driveshaft outboard joint from the appropriate wheel hub .
  • Rear: Remove the hub bearing unit .

  Is the magnetic encoder surface OK?

  YES 

  Go to step 6.

  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 6.

• 6. 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 at 12 mph (20 km/h) or more for 72 seconds or more.

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

  4. Check for DTCs with the HDS.

  Is DTC C1041-00, C1042-00, C1043-00, or C1044-00 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 , then go to step 2 and recheck. If the DTC is still present, replace the appropriate wheel bearing or the hub bearing unit .

  NO 

  Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.