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.
•  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.
•  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.
•  Start the engine and drive the vehicle at 20 km/h {13 mph} or more.
•  Are the same DTCs present?
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?
Yes
Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
No
DTC troubleshooting completed.