Dtc C1235/35 Foreign Object Is Attached On Tip Of Front Speed Sensor Rh

Brake. Camry. Acv40 Gsv40
Brake Control. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK SPEED SENSOR AND SPEED SENSOR ROTOR SERRATIONS

RECONFIRM DTC

INSPECT SPEED SENSOR

CHECK HARNESS AND CONNECTOR (SKID CONTROL SENSOR WIRE)

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

RECONFIRM DTC

CHECK FRONT SPEED SENSOR TIP

CHECK SPEED SENSOR ROTOR

RECONFIRM DTC

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)


DESCRIPTION

The speed sensors detect wheel speed and transmit the signals to the ECU. These signals are used for control of the ABS control system. Each of the front and rear rotors have 48 serrations.
When the rotors rotate, the magnetic field generated by the permanent magnet in the speed sensor induces an AC voltage.
Since the frequency of this AC voltage changes in direct proportion to the speed of the rotor, the frequency is used by the ECU to detect the speed of each wheel.
DTCs C1275/75 to C1278/78 can be deleted when the speed sensor sends a vehicle speed signal or the Test Mode ends. DTCs from C1275/75 to C1278/78 are output only in the Test Mode.
Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1235/35 Foreign Object Is Attached On Tip Of Front Speed Sensor Rh

DTC No.
DTC Detection Condition
Trouble Area
C1235/35
C1236/36
C1238/38
C1239/39
At a vehicle speed of 12 mph (20 km/h) or more, noise occurs in the sensor signal from the abnormal wheel for 5 seconds or more.
  1. Speed sensor
  2. Speed sensor rotor
  3. Sensor installation
  4. Brake actuator assembly
    (Skid control ECU)
HINT:
  1. DTC C1235/35 is for the front speed sensor RH.
  2. DTC C1236/36 is for the front speed sensor LH.
  3. DTC C1238/38 is for the rear speed sensor RH.
  4. DTC C1239/39 is for the rear speed sensor LH.

WIRING DIAGRAM


Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1235/35 Foreign Object Is Attached On Tip Of Front Speed Sensor Rh


Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1235/35 Foreign Object Is Attached On Tip Of Front Speed Sensor Rh


INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (CAMRY_ACV40 RM000000XHR03AX.html).
HINT:
When C0200/31, C0205/32, C0210/33, or C0215/34 is output together with C1235/35, C1236/36, C1238/38, or C1239/39, inspect and repair the trouble areas indicated by C0200/31, C0205/32, C0210/33, or C0215/34 first.
1.CHECK SPEED SENSOR AND SPEED SENSOR ROTOR SERRATIONS


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1235/35 Foreign Object Is Attached On Tip Of Front Speed Sensor Rh

  1. Disconnect the skid control ECU connector.

  1. Connect the oscilloscope to each speed sensor terminal of the skid control ECU.

  1. Check that a waveform is output when the tires are rotated (by the sensor circuit).

OK:
The same waveform is output from all the 4 wheels and there is no noise or interference in the waveform.

  1. Check that the waveform does not change while jiggling a connector or a wire harness.

    OK:
    The waveform does not change.
    HINT:
    1. As the vehicle speed (wheel revolution speed) increases, a cycle of the waveform narrows and the output voltage becomes greater.
    2. When noise is identified in the waveform on the oscilloscope, the erratic signals are generated due to speed sensor rotor's scratches, looseness or foreign matter attached to it.


NG
Go to step 3
OK


2.RECONFIRM DTC

  1. Reconnect the skid control ECU connector.

  1. Clear the DTC (CAMRY_ACV40 RM000000XHV04YX.html).

  1. Start the engine.

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

  1. Check if the same DTC is recorded (CAMRY_ACV40 RM000000XHV04YX.html).

    Result:

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


B
REPLACE BRAKE ACTUATOR ASSEMBLY
A

USE SIMULATION METHOD TO CHECK

3.INSPECT SPEED SENSOR


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1235/35 Foreign Object Is Attached On Tip Of Front Speed Sensor Rh

  1. Disconnect each speed sensor connector.

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

    Standard resistance:
    RH:
    Tester Connection
    		Condition
    		Specified Condition
    1 (FR+) - 2 (FR-)
    		Always
    		1.4 to 1.8 kΩ at 20°C (68 °F)
    1 (FR+) - Body ground
    		Always
    		10 kΩ or higher
    2 (FR-) - Body ground
    		Always
    		10 kΩ or higher
    2 (RR+) - 1 (RR-)
    		Always
    		0.9 to 2.1 kΩ
    2 (RR+) - Body ground
    		Always
    		10 kΩ or higher
    1 (RR-) - Body ground
    		Always
    		10 kΩ or higher
    LH:
    Tester Connection
    		Condition
    		Specified Condition
    1 (FL+) - 2 (FL-)
    		Always
    		1.4 to 1.8 kΩ at 20°C (68 °F)
    1 (FL+) - Body ground
    		Always
    		10 kΩ or higher
    2 (FL-) - Body ground
    		Always
    		10 kΩ or higher
    2 (RL+) - 1 (RL-)
    		Always
    		0.9 to 2.1 kΩ
    2 (RL+) - Body ground
    		Always
    		10 kΩ or higher
    1 (RL-) - Body ground
    		Always
    		10 kΩ or higher

    Result:

    Result
    		Proceed to
    OK (for rear)
    		A
    OK (for front)
    		B
    NG
    		C


B
Go to step 5

C
REPLACE SPEED SENSOR
A


4.CHECK HARNESS AND CONNECTOR (SKID CONTROL SENSOR WIRE)


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1235/35 Foreign Object Is Attached On Tip Of Front Speed Sensor Rh

  1. Disconnect the skid control sensor wire.

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

    Standard resistance:
    RH:
    Tester Connection
    		Condition
    		Specified Condition
    f1 ("A"-1) - f1 ("B"-2)
    		Always
    		Below 1 Ω
    f1 ("A"-1) - f1 ("B"-1)
    		Always
    		10 kΩ or higher
    f1 ("A"-1) - Body ground
    		Always
    		10 kΩ or higher
    f1 ("A"-2) - f1 ("B"-1)
    		Always
    		Below 1 Ω
    f1 ("A"-2) - f1 ("B"-2)
    		Always
    		10 kΩ or higher
    f1 ("A"-2) - Body ground
    		Always
    		10 kΩ or higher
    LH:
    Tester Connection
    		Condition
    		Specified Condition
    g1 ("A"-1) - g1 ("B"-2)
    		Always
    		Below 1 Ω
    g1 ("A"-1) - g1 ("B"-1)
    		Always
    		10 kΩ or higher
    g1 ("A"-1) - Body ground
    		Always
    		10 kΩ or higher
    g1 ("A"-2) - g1 ("B"-1)
    		Always
    		Below 1 Ω
    g1 ("A"-2) - g1 ("B"-2)
    		Always
    		10 kΩ or higher
    g1 ("A"-2) - Body ground
    		Always
    		10 kΩ or higher
    NOTICE:
    Check the speed sensor signal after replacement (CAMRY_ACV40 RM000000XHT03NX.html).


NG
REPLACE SKID CONTROL SENSOR WIRE
OK


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


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1235/35 Foreign Object Is Attached On Tip Of Front Speed Sensor Rh

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

    Standard resistance:
    RH:
    Tester Connection
    		Condition
    		Specified Condition
    A26-3 (FR+) - A35-1 (FR+)
    		Always
    		Below 1 Ω
    A26-3 (FR+) - Body ground
    		Always
    		10 kΩ or higher
    A26-17 (FR-) - A35-2 (FR-)
    		Always
    		Below 1 Ω
    A26-17 (FR-) - Body ground
    		Always
    		10 kΩ or higher
    A26-5 (RR+) - f1-1 (RR+)
    		Always
    		Below 1 Ω
    A26-5 (RR+) - Body ground
    		Always
    		10 kΩ or higher
    A26-19 (RR-) - f1-2 (RR-)
    		Always
    		Below 1 Ω
    A26-19 (RR-) - Body ground
    		Always
    		10 kΩ or higher
    LH:
    Tester Connection
    		Condition
    		Specified Condition
    A26-18 (FL+) - A14-1 (FL+)
    		Always
    		Below 1 Ω
    A26-18 (FL+) - Body ground
    		Always
    		10 kΩ or higher
    A26-4 (FL-) - A14-2 (FL-)
    		Always
    		Below 1 Ω
    A26-4 (FL-) - Body ground
    		Always
    		10 kΩ or higher
    A26-20 (RL+) - g1-1 (RL+)
    		Always
    		Below 1 Ω
    A26-20 (RL+) - Body ground
    		Always
    		10 kΩ or higher
    A26-6 (RL-) - g1-2 (RL-)
    		Always
    		Below 1 Ω
    A26-6 (RL-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.RECONFIRM DTC

  1. Reconnect the skid control sensor wire.

  1. Reconnect the skid control ECU connector and the speed sensor connector.

  1. Clear the DTC (CAMRY_ACV40 RM000000XHV04YX.html).

  1. Start the engine.

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

  1. Check if the same DTC is recorded (CAMRY_ACV40 RM000000XHV04YX.html).

    Result:

    Condition
    		Proceed to
    DTCs (C1235/35, C1236/36, C1238/38 and/or C1239/39) are output (for front)
    		A
    DTCs (C1235/35, C1236/36, C1238/38 and/or C1239/39) are output (for rear)
    		B
    DTCs (C1235/35, C1236/36, C1238/38 and/or C1239/39) are not output
    		C


B
Go to step 8

C
USE SIMULATION METHOD TO CHECK
A


7.CHECK FRONT SPEED SENSOR TIP

  1. Turn the ignition switch off.

  1. Remove the front speed sensor (CAMRY_ACV40 RM0000011P500SX.html).

  1. Check the speed sensor tip.

    OK:
    No scratches or foreign matter on the sensor tip.
    NOTICE:
    Check the speed sensor signal after cleaning or replacement (CAMRY_ACV40 RM000000XHT03NX.html).


NG
CLEAN OR REPLACE FRONT SPEED SENSOR
OK


8.CHECK SPEED SENSOR ROTOR

  1. Turn the ignition switch off.

  1. Remove each speed sensor rotor.

  1. Check the speed sensor rotor.

    OK:
    No scratches, oil, or foreign matter on the rotors.
    NOTICE:
    Check the speed sensor signal after cleaning or replacement (CAMRY_ACV40 RM000000XHT03NX.html).


NG
CLEAN OR REPLACE SPEED SENSOR ROTOR
OK


9.RECONFIRM DTC

  1. Install the front speed sensor and the speed sensor rotor.

  1. Clear the DTC (CAMRY_ACV40 RM000000XHV04YX.html).

  1. Start the engine.

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

  1. Check if the same DTC is recorded (CAMRY_ACV40 RM000000XHV04YX.html).

    Result:

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


B
USE SIMULATION METHOD TO CHECK
A

REPLACE BRAKE ACTUATOR ASSEMBLY