DTC C1233, C1234, C1235, C1236 [DSC/RSC]

id0402b3801600

DTC
C1233
C1234
C1235
C1236
LF ABS wheel-speed sensor/ABS sensor rotor system
RF ABS wheel-speed sensor/ABS sensor rotor system
RR ABS wheel-speed sensor/ABS sensor rotor system
LR ABS wheel-speed sensor/ABS sensor rotor system
DETECTION CONDITION
•  Vehicle wheel speed signals of any of the four vehicle wheels indicate abnormal acceleration that exceeds specification.
•  Periodic abnormality is detected in the signal wave pattern from the ABS wheel-speed sensors.
POSSIBLE CAUSE
•  ABS wheel-speed sensor malfunction (low output, metal shavings on sensor)
•  ABS sensor rotor malfunction (chipping of sensor rotor teeth)
•  Poor installation of ABS wheel-speed sensor and/or sensor rotor
•  DSC/RSC HU/CM malfunction
•  Excessive clearance between the ABS wheel-speed sensor and sensor rotor

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT PID FOR ABNORMAL OUTPUT FROM ABS WHEEL-SPEED SENSOR USING M-MDS
•  Turn the ignition switch off.
•  Connect the M-MDS to the DLC-2.
•  Select the following PIDs using the M-MDS:
―  WSPD_LF
―  WSPD_LR
―  WSPD_RF
―  WSPD_RR
•  Start the engine and drive the vehicle.
•  Verify that the PIDs of the four ABS wheel-speed sensors correspond approximately.
•  Do the vehicle speeds correspond?
Yes
Go to Step 4.
No
If there is a difference in speeds of the four wheels, go to the next step.
2
INSPECT IF MALFUNCTION OCCURRED DUE TO IMPROPER SENSOR CLEARANCE.
•  Inspect the clearance between the ABS wheel-speed sensor and the ABS sensor rotor.
•  Is the clearance normal?
Yes
Go to the next step.
No
Replace the ABS wheel-speed sensor, then go to Step 4.
(See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
(See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION [2WD].)
(See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION [4WD].)
3
VISUALLY INSPECT ABS SENSOR ROTOR FOR FOREIGN MATERIAL ADHERING OR IMPROPER INSTALLATION
•  Is the result normal?
Yes
Go to the next step.
No
Replace the front drive shaft, rear drive shaft, then go to the next step.
(See FRONT DRIVE SHAFT REMOVAL/INSTALLATION.)
(See REAR DRIVE SHAFT REMOVAL/INSTALLATION.)
4
VERIFY THAT THE SAME DTC IS NOT PRESENT
•  Clear the DTC from the memory.
•  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 DSC/RSC HU/CM, then go to the next step.
(See DSC/RSC HU/CM REMOVAL/INSTALLATION [L.H.D.].)
(See DSC/RSC HU/CM REMOVAL/INSTALLATION [R.H.D.].)
No
Go to the next step.
5
VERIFY THAT NO OTHER DTCS ARE PRESENT
•  Are any other DTCs output?
Yes
Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS [DSC/RSC].)
No
DTC troubleshooting completed.