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 [2WD].) (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION [4WD].)
4 | VERIFY THAT THE SAME DTC IS NOT PRESENT • Clear the DTC from the memory. (See ON-BOARD DIAGNOSIS [DSC/RSC].) • 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.