DTC C1222 [DSC/RSC]

id0402b3801500

DTC
C1222
ABS wheel-speed sensor system
DETECTION CONDITION
•  When the difference in the wheel speed between one tire and the others exceeds 25%.
POSSIBLE CAUSE
•  A tire of different diameter is installed
•  An incorrect ABS sensor rotor is installed (different number of teeth)
•  DSC/RSC HU/CM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT PID (WHEEL SPEED) FOR DIFFERENCE IN EACH WHEEL SPEED 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
•  Drive the vehicle.
•  Verify that the wheel speeds detected by the four ABS wheel speed sensors are approximately the same.
•  Are the wheel speeds approximately the same?
Yes
Go to Step 4.
No
Go to the next step.
2
INSPECT THE SIZE OF THE TIRE THAT HAS A DIFFERENT WHEEL SPEED
•  Inspect the tire for differences in the tire diameter caused by the tire size, wear, or tire pressure.
•  Is the tire diameter the same as the others?
Yes
Go to the next step.
No
Replace the tire, then go to Step 4.
3
INSPECT FOR INCORRECT ABS SENSOR ROTOR INSTALLATION
•  Inspect if the number of teeth on the ABS sensor rotor is incorrect.
•  Is the number of teeth correct?
Yes
Go to the next step.
No
Replace the ABS sensor rotor, then go to the next step.
(See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
(See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
4
VERIFY THAT THE SAME DTC IS NOT PRESENT
•  Clear the DTC from the memory.
•  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.