C1236 MERCURY, LINCOLN, FORD, MAZDA: LEFT REAR WHEEL SPEED SENSOR INPUT SIGNAL MISSING
POST UPDATED IN May, 2023
C1236 MERCURY, LINCOLN, FORD, MAZDA: LEFT REAR WHEEL SPEED SENSOR INPUT SIGNAL MISSING
Various signals indicating wheel speed are sent to the Anti-Lock Brake System Module. This data is provided by the Wheel Speed Sensors and it is from this information that the controller determines if it is necessary to activate the ABS System.
The purpose of a Wheel Speed Sensor is to detect the magnetic field of the sensor ring once it passes over the sensor face while in operation. The sensor circuit is connected to the ABS Module through two wires and a connector for each sensor. By placing the ignition switch in the RUN position, the ABS Module performs checks by sending a reference voltage to all sensors through its circuitry to verify that it is working properly
When the C1236 OBDII fault code is set, it is because the input signal corresponding to the Left Rear Wheel Speed Sensor was not detected.
The reasons for the C1236 OBD2 diagnostic code being set are:
The steps to correct the DTC C1236 OBDII code are as follows: