VSC sistem Diagnostic trouble code C0200 C0205 C1235 C1236

DTC C0200/31 Front Speed Sensor RH Circuit

DTC C0205/32 Front Speed Sensor LH Circuit

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

Description

Wiring diagram

Inspection procedure

Read value using intelligent tester (fr/fl speed open)

Read value using intelligent tester (fr/fl wheel speed, fr/fl wheel direction)

Perform signal check

Inspect front speed sensor installation

Inspect speed sensor tip

Inspect front speed sensor

Inspect skid control sensor wire

Check harness and connector (skid control ecu - front speed sensor wire)

Inspect master cylinder solenoid (skid control ecu output voltage)

Reconfirm dtc

Replace front speed sensor

Reconfirm dtc

Inspect speed sensor rotor

Description

The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used to control the Multi-terrain ABS, EBD, BA, VSC, A-TRC, CRAWL and hill-start assist control systems. 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 skid control ECU.

Diagnostic trouble code C0200 C0205 C1235 C1236 Land Cruiser Description
DTC Code DTC Detection Condition Trouble Area
C0200/31 C0205/32 When any of the following conditions is detected: 1. At a vehicle speed of 10 km/h (6 mph) or more, the pulses are not input for 1 second. 2. A momentary interruption of the speed sensor signal occurs at least 255 times when switching the ignition switch ON and off. 3. Continuous noise occurs in the speed sensor signals at a vehicle speed of 20 km/h (12 mph) or more. 4. The speed sensor signal circuit is open for 0.12 seconds or more.
  1. Front speed sensor RH
  2. Front speed sensor LH
  3. Harness or connector
  4. Speed sensor rotor
  5. Sensor installation
  6. Master cylinder solenoid (Skid control ECU)
C1235/35 C1236/36 Noise in the speed sensor signals occurs 75 times or more for 5 seconds when the vehicle speed is 20 km/h (12 mph) or more.
  1. Front speed sensor RH
  2. Front speed sensor LH
  3. Speed sensor rotor
  4. Sensor installation
  5. Master cylinder solenoid (Skid control ECU)

HINT:

  1. DTC C0200/31 and C1235/35 are for the front speed sensor RH.
  2. DTC C0205/32 and C1236/36 are for the front speed sensor LH.

Wiring diagram

Diagnostic trouble code C0200 C0205 C1235 C1236 Land Cruiser Wiring diagram

Inspection procedure

NOTICE:

When replacing the master cylinder solenoid, perform zero point calibration .

1.READ VALUE USING INTELLIGENT TESTER (FR/FL SPEED OPEN)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the intelligent tester on.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

    ABS/VSC/TRC
    Tester Display Measurement Item/Range Normal Condition Diagnostic Note
    FR Speed Open Front speed sensor RH open detection / Error or Normal Error: Momentary interruption Normal: Normal -
    FL Speed Open Front speed sensor LH open detection / Error or Normal Error: Momentary interruption Normal: Normal -

  1. Check for any momentary interruption in the wire harness and connector corresponding to the DTC .

    OK:

    There are no momentary interruptions.

HINT:

Perform the above inspection before removing the sensor and connector.

  NG  
REPAIR OR REPLACE HARNESS OR CONNECTOR
 
OK  
   

2.READ VALUE USING INTELLIGENT TESTER (FR/FL WHEEL SPEED, FR/FL WHEEL DIRECTION)

  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.

    ABS/VSC/TRC
    Tester Display Measurement Item/Range Normal Condition Diagnostic Note
    FR Wheel Speed Front wheel speed sensor RH reading /min.: 0 km/h (0 mph), max.: 326 km/h (202 mph) Actual wheel speed A similar speed is indicated on the speedometer.
    FL Wheel Speed Front wheel speed sensor LH reading /min.: 0 km/h (0 mph), max.: 326 km/h (202 mph) Actual wheel speed A similar speed is indicated on the speedometer.

    OK:

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

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

    ABS/VSC/TRC
    Tester Display Measurement Item/Range Normal Condition Diagnostic Note
    FR Wheel Direction Front wheel direction RH / Forward or Back Forward: Forward Back: Backward -
    FL Wheel Direction Front wheel direction LH / Forward or Back Forward: Forward Back: Backward -

    OK:

    The wheel direction is displayed correctly.

  NG  
Go to step 4
 
OK  
   

3.PERFORM SIGNAL CHECK

  1. Check if test mode (signal check) DTCs are output.

    HINT:

    Enter the following menus: Chassis / ABS/VSC/TRC / Utility / Signal Check.

    Result
    Result Proceed to
    Test mode (signal check) DTC is output A
    Test mode (signal check) DTC is not output B
  B  
Go to step 10
 
A  
   

4.INSPECT FRONT SPEED SENSOR INSTALLATION

  1. Check the speed sensor installation .

    OK:

    The installation bolt is tightened properly.

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

    NOTICE:

    Check the speed sensor signal after replacement .

  NG  
INSTALL FRONT SPEED SENSOR CORRECTLY
 
OK  
   

5.INSPECT 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 .

  NG  
CLEAN OR REPLACE FRONT SPEED SENSOR
 
OK  
   

6.INSPECT FRONT SPEED SENSOR

Diagnostic trouble code C0200 C0205 C1235 C1236 Land Cruiser Install the front speed sensor.

  1. Install the front speed sensor.

  1. Turn the ignition switch off.

  1. Disconnect the z17 and/or z18 front speed sensor connector.

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

    Standard Resistance:

    for RH:

    Tester Connection Switch Condition Specified Condition
    z17-2 (FR+) - Body ground Ignition switch off 10 k? or higher
    z17-1 (FR-) - Body ground Ignition switch off 10 k? or higher

    for LH:

    Tester Connection Switch Condition Specified Condition
    z18-2 (FL+) - Body ground Ignition switch off 10 k? or higher
    z18-1 (FL-) - Body ground Ignition switch off 10 k? or higher
    Text in Illustration
    *1 Component without harness connected (Front Speed Sensor)
    *a for RH
    *b for LH
  NG  
REPLACE FRONT SPEED SENSOR
 
OK  
   

7.INSPECT SKID CONTROL SENSOR WIRE

Diagnostic trouble code C0200 C0205 C1235 C1236 Land Cruiser Disconnect the z17 and Az2/z18 and Az1 skid control sensor wire connectors.

  1. Disconnect the z17 and Az2/z18 and Az1 skid control sensor wire connectors.

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

    Standard Resistance:

    for RH:

    Tester Connection Condition Specified Condition
    z17-2 (FR+) - Az2-5 Always Below 1 ?
    z17-2 (FR+) - Az2-1 Always 10 k? or higher
    z17-2 (FR+) - Body ground Always 10 k? or higher
    z17-1 (FR-) - Az2-1 Always Below 1 ?
    z17-1 (FR-) - Az2-5 Always 10 k? or higher
    z17-1 (FR-) - Body ground Always 10 k? or higher

    for LH:

    Tester Connection Condition Specified Condition
    z18-2 (FL+) - Az1-5 Always Below 1 ?
    z18-2 (FL+) - Az1-1 Always 10 k? or higher
    z18-2 (FL+) - Body ground Always 10 k? or higher
    z18-1 (FL-) - Az1-1 Always Below 1 ?
    z18-1 (FL-) - Az1-5 Always 10 k? or higher
    z18-1 (FL-) - Body ground Always 10 k? or higher
    Text in Illustration
    *1 Component without harness connected (Skid Control Sensor Wire)
    *a Sensor Side Connector
    *b Vehicle Side Connector
    *c for RH
    *d for LH

    NOTICE:

    Check the speed sensor signal after replacement .

  NG  
REPLACE SKID CONTROL SENSOR WIRE
 
OK  
   

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

  1. Disconnect the A24 skid control ECU connector and Az2/Az1 skid control sensor wire connector.

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

    Standard Resistance:

    for RH:

    Tester Connection Condition Specified Condition
    A24-3 (FR+) - Az2-5 Always Below 1 ?
    A24-3 (FR+) - Body ground Always 10 k? or higher
    A24-17 (FR-) - Az2-1 Always Below 1 ?
    A24-17 (FR-) - Body ground Always 10 k? or higher

    for LH:

    Tester Connection Condition Specified Condition
    A24-18 (FL+) - Az1-5 Always Below 1 ?
    A24-18 (FL+) - Body ground Always 10 k? or higher
    A24-4 (FL-) - Az1-1 Always Below 1 ?
    A24-4 (FL-) - Body ground Always 10 k? or higher
  NG  
REPAIR OR REPLACE HARNESS OR CONNECTOR
 
OK  
   

9.INSPECT MASTER CYLINDER SOLENOID (SKID CONTROL ECU OUTPUT VOLTAGE)

Diagnostic trouble code C0200 C0205 C1235 C1236 Land Cruiser Reconnect the A24 skid control ECU connector.

  1. Reconnect the A24 skid control ECU connector.

  1. Turn the ignition switch to ON.

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

    Standard Voltage:

    for RH:

    Tester Connection Switch Condition Specified Condition
    Az2-5 - Body ground Ignition switch ON 7.5 to 12 V

    for LH:

    Tester Connection Switch Condition Specified Condition
    Az1-5 - Body ground Ignition switch ON 7.5 to 12 V
    Text in Illustration
    *1 Front view of wire harness connector (to Front Speed Sensor Wire)
    *a for RH
    *b for LH
    Result
    Result Proceed to
    OK A
    NG for LHD B
    for RHD C
  B  
REPLACE MASTER CYLINDER SOLENOID
 
  C  
REPLACE MASTER CYLINDER SOLENOID
 
A  
   

10.RECONFIRM DTC

  1. Clear the DTCs .

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

  1. Check if the same DTCs are output .

    HINT:

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

    Result
    Result Proceed to
    DTC is output A
    DTC is not output (When troubleshooting in accordance with the Diagnostic Trouble Code Chart) B
    DTC is not output (When troubleshooting in accordance with the Problem Symptoms Table) C
  B  
USE SIMULATION METHOD TO CHECK
 
  C  
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
 
A  
   

11.REPLACE FRONT SPEED SENSOR

  1. Replace the front speed sensor .

    NOTICE:

    Check the speed sensor signal after replacement .

NEXT  
   

12.RECONFIRM DTC

  1. Clear the DTCs .

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

  1. Check if the same DTCs are output .

    HINT:

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

    Result
    Result Proceed to
    DTC is output A
    DTC is not output B
  B  
END
 
A  
   

13.INSPECT SPEED SENSOR ROTOR

  1. Remove the front axle hub sub-assembly .

  1. Check the sensor rotor.

    OK:

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

    NOTICE:

    Check the speed sensor signal after cleaning/replacement .

    Result
    Result Proceed to
    NG A
    OK for LHD B
    for RHD C
  B  
REPLACE MASTER CYLINDER SOLENOID
 
  C  
REPLACE MASTER CYLINDER SOLENOID
 
A  
   
CLEAN OR REPLACE FRONT AXLE HUB SUB-ASSEMBLY (SPEED SENSOR ROTOR)