DTC    C0200/31    Front Speed Sensor RH Circuit

DTC    C0205/32    Front Speed Sensor LH Circuit

DTC    C1271/71    Low Output Signal of Front Speed Sensor RH (Test Mode DTC)

DTC    C1272/72    Low Output Signal of Front Speed Sensor LH (Test Mode DTC)

for Preparation Click here


DESCRIPTION

The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used to control the ABS system. This speed sensor contains a sensor IC, which consists of 2 MREs (Magnetic Resistance Element). The speed sensor rotor, which consists of 48 sets of N and S poles that are arranged in a circle, is integrated with the inner race of the hub bearing.
To detect the rotation direction, the output waves are used to determine the relationship of the pulses that are generated by 2 MREs. Upon receiving this signal, the sensor IC outputs a forward or backward wave to the ECU.
DTCs C1271/71 and C1272/72 can be deleted when the speed sensor sends a vehicle speed signal or the Test Mode ends. DTCs C1271/71 and C1272/72 are output only in the Test Mode.
C110679E02

DTC No.
INF Code
DTC Detection Condition
Trouble Area
C0200/31
251
At a vehicle speed of 6 mph (10 km/h) or more, an open or short in the sensor signal circuit of the abnormal wheel continues for 1 second or more.
  1. Right front speed sensor
  2. Speed sensor circuit
  3. Sensor installation
  4. Speed sensor rotor
  5. Skid control ECU
↑
252
More than 1 wheel is abnormal.
↑
↑
253
Speed sensor signal circuit is open for 0.5 seconds or more.
↑
↑
254
Momentary interruption of sensor signal from the abnormal wheel occurs 255 times or more.
↑
↑
255
Frequency of 2.7 kHz or higher is input.
  1. Right front speed sensor
  2. Speed sensor circuit
  3. Speed sensor rotor
  4. Skid control ECU
↑
256
Rotating direction of each wheel changes 7 times with the engine switch on (IG) while driving at 6 mph (10 km/h) or more.
  1. Right front speed sensor
  2. Speed sensor circuit
  3. Sensor installation
  4. Speed sensor rotor
  5. Skid control ECU
↑
257
Rotating direction of one of the wheels is not the same as that of the other wheels for 1 second while driving at 18 mph (30 km/h) or more.
↑
↑
258
Rotating direction of one of the wheels is not detected normally, and the rotating direction of each of the other wheels is not the same for 1 second while driving at 18 mph (30 km/h) or more.
↑
↑
259
3 of the wheel sensors detect normal reversing signals, and the other wheel sensor detects malfunction signals 75 times with the engine switch on (IG) while reversing 1.8 mph (3 km/h).
↑
↑
260
At a vehicle speed of 6 mph (10 km/h) or more, the output from the vehicle speed sensor is halved for 5 seconds or more.
↑
↑
261
Reversing signal is output for 1 second or more while driving at 60 mph (100 km/h) or more.
↑
↑
262
With the voltage of IG1 terminal 9.5 V or more, the sensor power supply voltage decreases for 0.5 seconds or more.
  1. Speed sensor circuit
  2. Skid control ECU
C0205/32
264
At a vehicle speed of 6 mph (10 km/h) or more, an open or short in the sensor signal circuit of the abnormal wheel continues for 1 second or more.
  1. Left front speed sensor
  2. Speed sensor circuit
  3. Sensor installation
  4. Speed sensor rotor
  5. Skid control ECU
↑
265
More than 1 wheel is abnormal.
↑
↑
266
Speed sensor signal circuit is open for 0.5 seconds or more.
↑
↑
267
Momentary interruption of sensor signal from the abnormal wheel occurs 255 times or more.
↑
↑
268
Frequency of 2.7 kHz or higher is input.
  1. Left front speed sensor
  2. Speed sensor circuit
  3. Speed sensor rotor
  4. Skid control ECU
↑
269
Rotating direction of each wheel changes 7 times with the engine switch on (IG) while driving at 6 mph (10 km/h) or more.
  1. Left front speed sensor
  2. Speed sensor circuit
  3. Sensor installation
  4. Speed sensor rotor
  5. Skid control ECU
↑
270
Rotating direction of one of the wheels is not the same as that of the other wheels for 1 second while driving at 18 mph (30 km/h) or more.
↑
↑
271
Rotating direction of one of the wheels is not detected normally, and the rotating direction of each of the other wheels is not the same for 1 second while driving at 18 mph (30 km/h) or more.
↑
↑
272
3 of the wheel sensors detect normal reversing signals, and the other wheel sensor detects malfunction signals 75 times with the engine switch on (IG) while reversing 1.8 mph (3 km/h).
↑
↑
273
At a vehicle speed of 6 mph (10 km/h) or more, the output from the vehicle speed sensor is halved for 5 seconds or more.
↑
↑
274
Reversing signal is output for 1 second or more while driving at 60 mph (100 km/h) or more.
↑
↑
275
With the voltage of IG1 terminal 9.5 V or more, the sensor power supply voltage decreases for 0.5 seconds or more.
  1. Speed sensor circuit
  2. Skid control ECU

HINT:
  1. DTC C0200/31 is for the right front speed sensor.
  2. DTC C0205/32 is for the left front speed sensor.


WIRING DIAGRAM


C109385E02


INSPECTION PROCEDURE

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

HINT:
Start the inspection from step 1 when using the intelligent tester and start from step 3 when not using the intelligent tester.

1.CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

  1. Using the intelligent tester, check for any momentary interruption in the wire harness and connector corresponding to a DTC (Click here).

    ABS / VSC / TR(A)C: 
    Item (Display)
    		Measurement Item /
    Range (Display)
    		Normal Condition
    FR Speed Open
    		FR speed sensor open detection / ERROR or NORMAL
    		ERROR: Momentary interruption
    NORMAL: Normal
    FL Speed Open
    		FL speed sensor open detection / ERROR or NORMAL
    		ERROR: Momentary interruption
    NORMAL: Normal

    OK:
    There are no momentary interruptions.

    HINT:
    Perform the above inspection before removing the sensor and connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (SPEED SENSOR CIRCUIT)
OK


2.READ VALUE OF INTELLIGENT TESTER (FRONT SPEED SENSOR)

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine.

  1. Select the DATA LIST mode on the intelligent tester.

    ABS / VSC / TR(A)C: 
    Item (Display)
    		Measurement Item /
    Range (Display)
    		Normal Condition
    FR Wheel Speed
    		Wheel speed sensor (FR) reading /
    min.: 0 mph (0 km/h), max.: 202 mph (326 km/h)
    		Actual wheel speed
    FL Wheel Speed
    		Wheel speed sensor (FL) reading /
    min.: 0 mph (0 km/h), max.: 202 mph (326 km/h)
    		Actual wheel speed

  1. Check that there is the speed value output from the speed sensor displayed on the intelligent tester and the speed value displayed on the speedometer are almost the same when driving the vehicle.

    OK:
    The speed value output from the speed sensor displayed on the intelligent tester is the same as the actual vehicle speed.


    ABS / VSC / TR(A)C: 
    Item (Display)
    		Measurement Item /
    Range (Display)
    		Normal Condition
    FR Wheel Direction
    		Wheel direction (FR) / FORWARD or BACK
    		FORWARD: Forward
    BACK: Back
    FL Wheel Direction
    		Wheel direction (FL) / FORWARD or BACK
    		FORWARD: Forward
    BACK: Back

  1. Check that the sensor signal conforms to the wheel direction.

    OK:
    The wheel direction is displayed.



NG
Go to step 5
OK


3.PERFORM TEST MODE (SIGNAL CHECK)

  1. Clear the DTC (Click here).

  1. Perform sensor signal check in TEST MODE PROCEDURE (Click here).

    OK:
    All Test Mode DTCs are erased.



NG
Go to step 5
OK


4.RECONFIRM DTC

  1. Clear the DTC (Click here).

  1. Start the engine.

  1. Drive the vehicle at the speed of 20 mph (32 km/h) or more for 60 seconds or more.

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

    Result:

    Condition
    		Proceed To
    DTCs (C0200/31 and C0205/32) are not output
    		A
    DTCs (C0200/31 and C0205/32) are output
    		B

    HINT:
    If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step (Click here).



B
Go to step 11
A

END 

5.INSPECT FRONT SPEED SENSOR INSTALLATION


    F010178E03

  1. Check the sensor installation.

    OK:
    There is no clearance between the sensor and the front steering knuckle.

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



NG
CHECK AND REPLACE FRONT SPEED SENSOR
OK


6.INSPECT FRONT SPEED SENSOR TIP

  1. Remove the front speed sensor.

  1. Check the sensor tip.

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

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



NG
CLEAN OR REPLACE FRONT SPEED SENSOR
OK


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


    C107603E05

  1. Disconnect the skid control sensor wire.

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

    Resistance:
    RH:
    Tester Connection
    		Specified Condition
    n1 ("A"-2) - n1 ("B"-1)
    		Below 1 Ω
    n1 ("A"-2) - n1 ("B"-2)
    		10 kΩ or higher
    n1 ("A"-2) - Body ground
    		10 kΩ or higher
    n1 ("A"-1) - n1 ("B"-2)
    		Below 1 Ω
    n1 ("A"-1) - n1 ("B"-1)
    		10 kΩ or higher
    n1 ("A"-1) - Body ground
    		10 kΩ or higher
    LH:
    Tester Connection
    		Specified Condition
    m1 ("A"-2) - m1 ("B"-1)
    		Below 1 Ω
    m1 ("A"-2) - m1 ("B"-2)
    		10 kΩ or higher
    m1 ("A"-2) - Body ground
    		10 kΩ or higher
    m1 ("A"-1) - m1 ("B"-2)
    		Below 1 Ω
    m1 ("A"-1) - m1 ("B"-1)
    		10 kΩ or higher
    m1 ("A"-1) - Body ground
    		10 kΩ or higher

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



NG
REPLACE SKID CONTROL SENSOR WIRE
OK


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


    C110689E02

  1. Disconnect the skid control ECU (A13, A15) connectors and the front 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
    LH:
    Tester Connection
    		Specified Condition
    A15-13 (FL+) - m1-2 (FL+)
    		Below 1 Ω
    A15-25 (FL-) - m1-1 (FL-)
    		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
    LH:
    Tester Connection
    		Specified Condition
    A15-13 (FL+) - Body ground
    		10 kΩ or higher
    A15-25 (FL-) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


9.INSPECT SKID CONTROL ECU (SENSOR INPUT VOLTAGE)


    C110680E06

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

  1. Disconnect the 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



NG
REPLACE SKID CONTROL ECU
OK


10.RECONFIRM DTC

  1. Clear the DTC (Click here).

  1. Start the engine.

  1. Drive the vehicle at the speed of 20 mph (32 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 (C0200/31 and C0205/32) are not output
    		A
    DTCs (C0200/31 and C0205/32) are output
    		B

    HINT:
    If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step (Click here).



B
Go to step 11
A

END 

11.REPLACE FRONT SPEED SENSOR

  1. Replace the front speed sensor (Click here).

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


NEXT


12.RECONFIRM DTC

  1. Clear the DTC (Click here).

  1. Start the engine.

  1. Drive the vehicle at the speed of 20 mph (32 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 (C0200/31 and C0205/32) are output
    		A
    DTCs (C0200/31 and C0205/32) are not output
    		B

    HINT:
    If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step (Click here).



B
END
A


13.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

REPLACE SKID CONTROL ECU