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

DTC    C1275/75    Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC)

DTC    C1276/76    Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC)

DTC    C1277/77    Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC)

DTC    C1278/78    Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC)

for Preparation Click here


DESCRIPTION

Refer to DTCs C0200/31 and C0205/32 (Click here).
DTCs C1275/75 to C1278/78 can be deleted when the speed sensor sends a vehicle speed signal or the Test Mode ends. DTCs C1275/75 to C1278/78 are output only in the Test Mode.

DTC No.
INF Code
DTC Detection Condition
Trouble Area
C1235/35
302
When either of the following is detected:
  1. Continuous noise occurs in speed sensor signals when vehicle speed is 12 mph (20 km/h) or more for 5 seconds or more.
  2. At a vehicle speed of 6 mph (10 km/h) or more, noise is input once per rotor rotation continues for 15 seconds or more.
  1. Right front speed sensor
  2. Speed sensor circuit
  3. Sensor installation
  4. Speed sensor rotor
  5. Skid control ECU
C1236/36
303
↑
  1. Left front speed sensor
  2. Speed sensor circuit
  3. Sensor installation
  4. Speed sensor rotor
  5. Skid control ECU
C1238/38
304
↑
  1. Right rear speed sensor
  2. Speed sensor circuit
  3. Sensor installation
  4. Speed sensor rotor
  5. Skid control ECU
C1239/39
305
↑
  1. Left rear speed sensor
  2. Speed sensor circuit
  3. Sensor installation
  4. Speed sensor rotor
  5. Skid control ECU

HINT:
  1. DTC C1235/35 is for the right front speed sensor.
  2. DTC C1236/36 is for the left front speed sensor.
  3. DTC C1238/38 is for the right rear speed sensor.
  4. DTC C1239/39 is for the left rear speed sensor.


WIRING DIAGRAM

Refer to DTCs C0200/31 and C0205/32 (Click here) or DTC C0210/33 and C0215/34 (Click here).

INSPECTION PROCEDURE

NOTICE:
When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration (Click here).

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


    C110723E02

  1. Disconnect the skid control ECU (A13, A15) connectors and each speed sensor connector.

  1. Measure the resistance according to the value(s) in the table below.

    Resistance:
    RH:
    Tester Connection
    		Specified Condition
    A13-15 (FR+) - n1-2 (FR+)
    		Below 1 Ω
    A13-28 (FR-) - n1-1 (FR-)
    		Below 1 Ω
    A15-10 (RR+) - p1-2 (RR+)
    		Below 1 Ω
    A15-23 (RR-) - p1-1 (RR-)
    		Below 1 Ω
    LH:
    Tester Connection
    		Specified Condition
    A15-13 (FL+) - m1-2 (FL+)
    		Below 1 Ω
    A15-25 (FL-) - m1-1 (FL-)
    		Below 1 Ω
    A13-11 (RL+) - o1-2 (RL+)
    		Below 1 Ω
    A13-12 (RL-) - o1-1 (RL-)
    		Below 1 Ω

  1. Measure the resistance according to the value(s) in the table below.

    Resistance:
    RH:
    Tester Connection
    		Specified Condition
    A13-15 (FR+) - Body ground
    		10 kΩ or higher
    A13-28 (FR-) - Body ground
    		10 kΩ or higher
    A15-10 (RR+) - Body ground
    		10 kΩ or higher
    A15-23 (RR-) - Body ground
    		10 kΩ or higher
    LH:
    Tester Connection
    		Specified Condition
    A15-13 (FL+) - Body ground
    		10 kΩ or higher
    A15-25 (FL-) - Body ground
    		10 kΩ or higher
    A13-11 (RL+) - Body ground
    		10 kΩ or higher
    A13-12 (RL-) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.INSPECT SKID CONTROL ECU (SENSOR INPUT VOLTAGE)


    C110682E04

  1. Reconnect the skid control ECU (A13, A15) connectors.

  1. Disconnect each speed sensor connector.

  1. Turn the engine switch on (IG).

  1. Measure the voltage according to the value(s) in the table below.

    Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    n1-2 (FR+) -
    Body ground
    		Engine switch on (IG)
    		6.7 to 14 V
    m1-2 (FL+) -
    Body ground
    		Engine switch on (IG)
    		6.7 to 14 V
    p1-2 (RR+) -
    Body ground
    		Engine switch on (IG)
    		6.7 to 14 V
    o1-2 (RL+) -
    Body ground
    		Engine switch on (IG)
    		6.7 to 14 V



NG
REPLACE SKID CONTROL ECU
OK


3.RECONFIRM DTC

  1. Clear the DTC (Click here).

  1. Start the engine.

  1. Drive the vehicle at the speed of 12 mph (20 km/h) or more for 60 seconds or more.

  1. Check if the same DTCs are recorded (Click here).

    HINT:
    Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.


    Result:

    Condition
    		Proceed To
    DTCs (C1235/35, C1236/36, C1238/38 and C1239/39) are output
    		A
    DTCs (C1235/35, C1236/36, C1238/38 and C1239/39) are not output
    		B



B
END
A


4.INSPECT SPEED SENSOR TIP

  1. Remove the each speed sensor (Click here for front, or Click here for rear).

  1. Check the sensor tip.

    OK:
    No scratches or foreign matter on the sensor tip.

    NOTICE:
    Check the speed sensor signal after replacement (Click here).



NG
CLEAN OR REPLACE SPEED SENSOR
OK


5.INSPECT SPEED SENSOR ROTOR

  1. Remove the speed sensor rotor.

  1. Check the sensor rotor.

    OK:
    No scratches, oil, or foreign matter on the rotors.

    NOTICE:
    Check the speed sensor signal after cleaning/replacement (Click here).



NG
CLEAN OR REPLACE SPEED SENSOR ROTOR
OK


6.RECONFIRM DTC

  1. Clear the DTCs (Click here).

  1. Turn the engine switch on (IG).

  1. Check if the same DTCs are recorded (Click here).

    Result:

    Condition
    		Proceed To
    DTCs (C1235/35, C1236/36, C1238/38 and C1239/39) are not output
    		A
    DTCs (C1235/35, C1236/36, C1238/38 and C1239/39) are output
    		B



B
REPLACE SKID CONTROL ECU
A

END