DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236 [ABS]

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DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236 [ABS]

B3E040243000W06

  Note

  • When only the driving wheels are rotated while the vehicle is jacked up, DTCs C1235 and C1236 are input to the memory.

DTC | C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236 | ABS wheel-speed sensor/ABS sensor rotor

DETECTION CONDITION

• C1141, C1142, C1143, C1144

  - Periodic abnormality is detected in the signal wave pattern from the ABS wheel-speed sensors.

• C1234, C1233, C1235, C1236

  - Wheel speed signal is not input or extremely low wheel speed signal is input from any of the four wheels when driving at a vehicle speed of 10 km/h {6.2 mph} or more.
  - A large, sudden change in wheel speed signal is detected.
  - ABS control operates for 28 s or more.

POSSIBLE CAUSE | • ABS wheel-speed sensor malfunction • ABS sensor rotor malfunction (foreign material adhering) • Improper installation of ABS wheel-speed sensor and/or sensor rotor • Excessive clearance between the ABS wheel-speed sensor and sensor rotor • Continuous ABS operation

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---

1

INSPECT PID FOR ABS WHEEL-SPEED SENSOR OUTPUT ERROR USING WDS OR EQUIVALENT
• Turn the ignition switch off.
• Connect the WDS or equivalent to the DLC-2.
• Select the following PIDs using the WDS or equivalent:
LF_WSPD
LR_WSPD
RF_WSPD
RR_WSPD
• Drive the vehicle.
• Verify that the vehicle speeds detected by the four ABS wheel-speed sensors are approximately the same.
• Are the vehicle speeds approximately the same?

Yes

Go to Step 3.

No | Go to the next step.

2

INSPECT FOR SHORT TO GROUND BETWEEN ABS WHEEL-SPEED SENSOR CONNECTORS AND GROUND
• Disconnect the ABS wheel-speed sensor connectors.
• Inspect for no continuity between the following ABS wheel-speed sensor connector terminals (vehicle harness-side) and body ground:

  - ABS wheel-speed sensor (RF):
  B-Body ground
  - ABS wheel-speed sensor (LF):
  B-Body ground
  - ABS wheel-speed sensor (RR):
  B-Body ground
  - ABS wheel-speed sensor (LR):
  B-Body ground

• Is the continuity normal?

Yes

Go to the next step.

No | Repair or replace the wiring harness, then go to Step 6.

3

INSPECT IF MALFUNCTION OCCURRED DUE TO IMPROPER SENSOR CLEARANCE.
• Inspect the clearance between the ABS wheel-speed sensor and the ABS sensor rotor.
(See FRONT ABS WHEEL-SPEED SENSOR INSPECTION.)
(See REAR ABS WHEEL-SPEED SENSOR INSPECTION.)
• Is the clearance normal?

  Clearance
  Front: 2.1 mm {0.082 in} or less
  Rear: 1.46 mm {0.057 in} or less

Yes

Go to the next step.

No | Replace the ABS wheel-speed sensor, then go to Step 6. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.) (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
4 | VISUALLY INSPECT ABS SENSOR ROTOR FOR FOREIGN MATERIAL ADHERING OR IMPROPER INSTALLATION • Is the result normal? | Yes | Go to Step 6.
No | Replace the wheel hub component, then go to Step 6. (See WHEEL HUB, STEERING KNUCKLE REMOVAL/INSTALLATION.) (See WHEEL HUB COMPONENT REMOVAL/INSTALLATION.)
5 | INSPECT IF MALFUNCTION OCCURRED DUE TO INTERNAL MALFUNCTION OF HYDRAULIC UNIT (CLOGGING IN PIPING) • Perform the ABS system operation inspection. (See ABS SYSTEM INSPECTION.) • Is the system normal? | Yes | Go to the next step.
No | Replace the hydraulic unit, then go to the next step. (See ABS HU/CM REMOVAL/INSTALLATION.)
6 | VERIFY THAT THE SAME DTC IS NOT PRESENT • Clear the DTCs from the memory. (See Clearing DTCs Procedures.) • Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more. • Are the same DTCs present? | Yes | Repeat the inspection from Step 1. If the malfunction recurs, replace the ABS HU/CM, then go to the next step. (See ABS HU/CM REMOVAL/INSTALLATION.)
No | Go to the next step.
7 | VERIFY THAT NO OTHER DTCS ARE PRESENT • Are any other DTCs output? | Yes | Go to the applicable DTC inspection. (See DTC Table.)
No | DTC troubleshooting completed.