2013 Mazda MX-5 Miata Grand Touring, Automatic TransFACTORY OEM SERVICE PROCEDURE

DTC C1222 [Dynamic Stability Control (DSC)]: Notes

NOTE:
  • DTC C1222 will be detected when a malfunctioning ABS wheel-speed sensor cannot be specified.
DTC C1222 DETECTION CONDITION AND POSSIBLE CAUSE

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
G06151244Courtesy of MAZDA MOTORS CORP.
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