RX400h · Service Manual BRAKE

C0200/31

Diagnostic trouble codes

DESCRIPTION

F000010E05
The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used to control the ABS control system. The front rotors have 48 serrations, respectively.
When the rotors rotate, the magnetic field emitted by the permanent magnet in the speed sensor generates 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 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.
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 ignition switch on 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 ignition switch on while reversing at 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 ignition switch on 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 ignition switch on while reversing at 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.
  3. The BRAKE warning light comes on when speed sensor malfunctions are detected in two or more wheels.


WIRING DIAGRAM

F100404E05

INSPECTION PROCEDURE

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


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 / TRAC: 
    Item
    		 Measurement Item /
    Range (Display)
    		 Normal Condition
    FR Speed Open
    		 FR speed sensor open detection /
    NORMAL or ERROR
    		 NORMAL : Normal condition
    FL Speed Open
    		 FR speed sensor open detection /
    NORMAL or ERROR
    		 NORMAL : Normal condition

    OK:
    There are no momentary interruptions.

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



 NG
Go to step 10
OK


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

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch ON position.

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

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

  1. Check that there is no difference between the speed value output from the speed sensor displayed on the intelligent tester and the speed value displayed on the speedometer when driving the vehicle.

    OK:
    There is almost no difference from the displayed speed value.

    HINT:
    There is tolerance of +-10 % in the speedometer indication.



 OK
Go to step 8
NG


3. INSPECT FRONT SPEED SENSOR INSTALLATION

  1. BR03795E33
    Check the sensor installation.

    OK:
    There is no clearance between the sensor and rear axle carrier.
    The installation bolt is tightened properly.
    Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf)

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



 NG
CHECK AND REPLACE FRONT SPEED SENSOR
OK


4. INSPECT FRONT SPEED SENSOR

  1. F100406E01
    Make sure that there is no looseness at the connector's locking part and connecting part of the connector.

  1. Disconnect the speed sensor connector.

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

    Resistance:
    LH:
    Tester Connection
    		 Specified Condition
    2 (FL+) - 1 (FL-)
    		 1.4 to 1.8 kΩ
    RH:
    Tester Connection
    		 Specified Condition
    2 (FR+) - 1 (FR-)
    		 1.4 to 1.8 kΩ

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

    Resistance:
    LH:
    Tester Connection
    		 Specified Condition
    1 (FL-) - Body ground
    		 10 kΩor higher
    2 (FL+) - Body ground
    		 10 kΩor higher
    RH:
    Tester Connection
    		 Specified Condition
    1 (FR-) - Body ground
    		 10 kΩor higher
    2 (FR+) - Body ground
    		 10 kΩor higher

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



 NG
REPLACE FRONT SPEED SENSOR
OK


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

  1. F100405E02
    Disconnect the skid control ECU connectors and the front speed sensor connectors.

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

    Resistance:
    LH:
    Tester Connection
    		 Specified Condition
    S2-1 (FL-) - S38-22 (FL-)
    		 Below 1 Ω
    S2-2 (FL+) - S38-28 (FL+)
    		 Below 1 Ω
    RH:
    Tester Connection
    		 Specified Condition
    S3-1 (FR-) - S41-22 (FR-)
    		 Below 1 Ω
    S3-2 (FR+) - S41-32 (FR+)
    		 Below 1 Ω

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

    Resistance:
    LH:
    Tester Connection
    		 Specified Condition
    S2-2 (FL+) - Body ground
    		 10 kΩ or higher
    S2-1 (FL-) - Body ground
    		 10 kΩ or higher
    RH:
    Tester Connection
    		 Specified Condition
    S3-2 (FR+) - Body ground
    		 10 kΩ or higher
    S3-1 (FR-) - Body ground
    		 10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6. INSPECT SPEED SENSOR AND SENSOR ROTOR SERRATIONS
C112029E04

  1. Connect the skid control ECU connectors.

  1. Connect the oscilloscope to terminals S41-32 (FR+) and S41-22 (FR-) or S38-28 (FL+) and S38-22 (FL-) of the skid control ECU.

  1. Drive the vehicle at approximately 19 mph (30 km/h), and check the signal waveform.

    OK:
    A waveform as shown in the figure should be output.

    HINT:
    1. As the vehicle speed (wheel revolution speed) increases, a cycle of the waveform narrows and the fluctuation in the output voltage becomes greater.
    2. When noise is identified in the waveform on the oscilloscope, error signals are generated due to the speed sensor rotor's scratches, looseness or foreign matter attached to it.



 NG
CLEAN OR REPLACE FRONT SPEED SENSOR AND SENSOR ROTOR
OK


7. READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on.

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

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

  1. Check that there is no difference between the speed value output from the speed sensor displayed on the intelligent tester and the speed value displayed on the speedometer when driving the vehicle.

    OK:
    There is almost no difference from the displayed speed value.

    HINT:
    There is tolerance of +- 10 % in the speedometer indication.



 NG
REPLACE SKID CONTROL ECU
OK

END

8. PERFORM TEST MODE (SIGNAL CHECK)

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

    OK:
    All test mode DTCs are erased.



 NG
Go to step 3
OK


9. INSPECT SPEED SENSOR AND SENSOR ROTOR SERRATIONS

  1. C112029E04
    Connect the oscilloscope to terminals S41-32 (FR+) and S41-22 (FR-) or S38-28 (FL+) and S38-22 (FL-) of the skid control ECU.

  1. Drive the vehicle at approximately 19 mph (30 km/h), and check the signal waveform.

    OK:
    A waveform as shown in the figure should be output.

    HINT:
    1. As the vehicle speed (wheel revolution speed) increases, a cycle of the waveform narrows and the fluctuation in the output voltage becomes greater.
    2. When noise is identified in the waveform on the oscilloscope, error signals are generated due to the speed sensor rotor's scratches, looseness or foreign matter attached to it.



 NG
CLEAN OR REPLACE FRONT SPEED SENSOR AND SENSOR ROTOR
OK

END

10. REPAIR OR REPLACE HARNESS OR CONNECTOR (BETWEEN FRONT SPEED SENSOR AND SKID CONTROL ECU)

NEXT


11. RECONFIRM DTC

  1. Clear the DTC (Click here).

  1. Turn the ignition switch on.

  1. Drive the vehicle at the speed of 32 km/h (20 mph) or more, for 60 seconds or more, and drive in reverse at a speed of 3 km/h (2 mph) or more, for approximately 5 seconds.

  1. Check that the same DTC is recorded (Click here).

    HINT:
    Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.


    Result:
    Condition
    		 Proceed To
    DTC is not output
    		 A
    DTC is output
    		 B



B
Go to step 2
A

END


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