ABS (Antilock Brake System)

BRAKE CONTROL: ANTI-LOCK BRAKE SYSTEM: C1235/35: Foreign Object is Attached on Tip of Front Speed Sensor RH

DTC C1235/35 - Foreign Object is Attached on Tip of Front Speed Sensor RH

DTC C1236/36 - Foreign Object is Attached on Tip of Front Speed Sensor LH

DTC C1238/38 - Foreign Object is Attached on Tip of Rear Speed Sensor RH

DTC C1239/39 - Foreign Object is Attached on Tip of Rear Speed Sensor LH

DESCRIPTION

The Skid Control ECU sets this DTC if, according to abnormal signals input by the sensor, it detects that foreign material is adhering to the speed sensor tip or the sensor rotor, or the rotor has any missing teeth.
This DTC may be set if parts such as the speed sensor circuit connector or wire harness are malfunctioning.





HINT: DTC C1235/35 relates to the front speed sensor RH.

DTC C1236/36 relates to the front speed sensor LH.

DTC C1238/38 relates to the rear speed sensor RH.

DTC C1239/39 relates to the rear speed sensor LH.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SPEED SENSOR)





(a) Disconnect the skid control ECU connector.
(b) Disconnect speed sensor connectors.
(c) Measure the resistance.
Standard Resistance:





(d) Measure the resistance.
Standard Resistance:





(e) Reconnect speed sensor connectors.
(f) Reconnect the skid control ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. INSPECT BRAKE ACTUATOR (TERMINAL VOLTAGE)





(a) Disconnect the speed sensor connectors.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage.
Standard Voltage:





(d) Turn the ignition switch to OFF.
(e) Reconnect the speed sensor connectors.
NG -- REPLACE BRAKE ACTUATOR
OK -- Continue to next step.
3. RECONFIRM DTC
(a) Clear the DTCs (Reading and Clearing Diagnostic Trouble Codes).
(b) Drive the vehicle at 10 km/h (6 mph) or more to activate initial check.
(c) Check if the same DTCs are recorded.





B -- CHECK FOR INTERMITTENT PROBLEMS
A -- Continue to next step.
4. INSPECT SPEED SENSOR
(a) Remove the speed sensor.
(b) Check the sensor tip.
OK:
No scratches or foreign matter on the sensor tip.
NG -- CLEAN OR REPLACE SPEED SENSOR
OK -- CLEAN OR REPLACE SPEED SENSOR