DTC C1020: Abnormality In RL Wheel Speed Sensor Circuit: Notes

Fig 1: Wheel Speed Sensor Circuit Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

CAUTION:

If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to TROUBLE CODE DIAGNOSIS ).
Whenever ECU is replaced, ensure that the CAN bus lines are normal.
When the hydraulic unit (integrated with ASC-ECU) is replaced, always carry out the calibration of the steering wheel sensor, the G and yaw rate sensor and brake fluid pressure sensor (Refer to BRAKE FLUID PRESSURE SENSOR CALIBRATION , G AND YAW RATE SENSOR CALIBRATION and BRAKE FLUID PRESSURE SENSOR CALIBRATION ).