DTC C1222 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2801500

  Note
  • DTC C1222 will be detected when a malfunctioning ABS wheel-speed sensor cannot be specified.

DTC | C1222 | ABS wheel-speed sensor (slip monitor) system
DETECTION CONDITION | • Condition 1 ― ABS control for two wheels or more is continued for 60 s (If accelerator pedal is ON and brake switch is OFF and vehicle speed is more than 50 km/h {31 mph}, it is detected when 10 s has elapsed). • Condition 2 ― While the vehicle is driven at a speed of 20 km/h {13 mph}or more, difference in each wheel speed is continuously not within the specification. • Condition 3 ― There is difference between yaw rate value calculated based on the ABS wheel-speed sensor and yaw rate value calculated based on the steering angle sensor (abnormal cornering direction is detected).
POSSIBLE CAUSE | • Tire type or size is different between the front and rear wheels. • 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 (If the sensor rotor is installed at an angle, it may cause output of abnormal wave pattern at high speeds.) • 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 to the LOCK position. • Connect the M-MDS to the DLC-2. • Select the following PIDs using the M-MDS: ― LF_WSPD ― LR_WSPD ― RF_WSPD ― RR_WSPD • 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 5.
No | If there is a difference in speeds of the four wheels, go to the next step.
2 | INSPECT TIRE SIZE AND PRESSURE • Inspect the tire size and tire pressure of each wheel. (See WHEEL AND TIRE SPECIFICATION.) • Is the tire size and tire pressure as specified? | Yes | Go to the next step.
No | Install the specified tire or adjust the tire pressure, then go to Step 5.
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? | Yes | Go to the next step.
No | Replace the rear ABS wheel-speed sensor, then go to Step 5. (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 the next step.
No | Replace the front wheel hub component or rear drive shaft, then go to the next step. (See WHEEL HUB, STEERING KNUCKLE REMOVAL/INSTALLATION.) (See REAR DRIVE SHAFT REMOVAL/INSTALLATION.)
5 | VERIFY DTC TROUBLESHOOTING COMPLETED • Clear the DTC from the memory. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) • Start the engine and drive the vehicle at 20 km/h {13 mph} or more. • Are the same DTCs present? (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) | Yes | Repeat the inspection from Step 1. If the malfunction recurs, replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
No | Go to the next step.
6 | VERIFY AFTER REPAIR PROCEDURE • Are any other DTCs present? (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) | Yes | Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
No | DTC troubleshooting completed.