DTC C1222 [DYNAMIC STABILITY CONTROL]

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

• Difference between any vehicle wheel speeds exceeds specification when driving at a constant speed.
• ABS control operates for 60 s or more.

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 (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 off.
• 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 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.
Clearance
Front: 0.3-1.0 mm {0.012-0.057 in}
Rear: 0.8-1.6 mm {0.032-0.062 in}
Yes
Go to the next step.
No
Replace the rear ABS wheel-speed sensor, then go to Step 4.
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 wheel hub component or rear drive shaft, then go to the next step.
4
VERIFY DTC TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• 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 HU/CM, then go to the next step.
No
Go to the next step.
5
VERIFY AFTER REPAIR PROCEDURE
• Are any other DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC Table.)
No
DTC troubleshooting completed.