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Home >> Toyota >> 2009 >> Matrix S, AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control/Dynamic Control System >> Vehicle Stability Control System >> 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) >> Inspection Procedure
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Inspection Procedure

NOTE: When replacing the brake actuator assembly, perform zero point calibration (See CALIBRATION  ).
  1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION) 
    1. Using the Techstream, check for any momentary interruptions in the wire harness and connector corresponding to a DTC (See CHECK FOR INTERMITTENT PROBLEMS  ).

      ABS/VSC/TRAC 

      ABS/VSC/TRAC DIAGNOSTIC CHART

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      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      		 -

      Result 

      RESULT CHART

      Result Proceed to
      There are momentary interruptions A
      There are no momentary interruptions B
      There is a constant open circuit C

      HINT:

      Perform the above inspection before removing the sensor and connector.

      B: Go to step  4

      C: Go to step  7

      A: Go to next step 

  2. REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR) 
    1. Turn the ignition switch off.
    2. Repair or replace the harness or connector.
    3. Check for any momentary interruptions between the skid control ECU and front speed sensor (See CHECK FOR INTERMITTENT PROBLEMS  ).
    4. Check that there are no momentary interruptions.
  3. RECONFIRM DTC 
    1. Turn the ignition switch off.
    2. Clear the DTCs (See DTC CHECK / CLEAR  ).
    3. Start the engine.
    4. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
    5. Check if the same DTC is recorded (See DTC CHECK / CLEAR  ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTCs (C0200/31 and/or 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 (See PROBLEM SYMPTOMS TABLE  ).

      B: END 

      A: Go to next step 

  4. READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR) 
    1. Turn the ignition switch off.
    2. Connect the Techstream to the DLC3.
    3. Start the engine.
    4. Select Data List mode on the Techstream (See DATA LIST / ACTIVE TEST  ).

      ABS/VSC/TRAC 

      ABS/VSC/TRAC DATA LIST

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Wheel Speed FR wheel speed sensor reading / min.: 0 km/h (0 mph), max.: 326.4 km/h (202 mph) Actual wheel speed Similar speed as indicated on speedometer
      FL Wheel Speed FL wheel speed sensor reading /min.: 0 km/h (0 mph), max.: 326.4 km/h (202 mph) Actual wheel speed Similar speed as indicated on speedometer
    5. Check that there is no difference between the speed value output from the speed sensor displayed on the Techstream and the speed value displayed on the speedometer when driving the vehicle.

      HINT:

      Factors that affect the indicated vehicle speed include tire size, tire inflation, and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using a speedometer tester (calibrated chassis dynamometer). For details about testing and the margin of error, see the reference chart (See ON-VEHICLE INSPECTION ).

      OK: 

      The speed value output from the speed sensor displayed on the Techstream is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer)  .

      NG: Go to step  7

      OK: Go to next step 

  5. PERFORM TEST MODE (SIGNAL CHECK) 
    1. Turn the ignition switch off.
    2. Perform the sensor check in the Test Mode procedure (See TEST MODE PROCEDURE  ).

      OK: 

      All Test Mode DTCs are cleared  .

      NG: Go to step  7

      OK: Go to next step 

  6. RECONFIRM DTC 
    1. Turn the ignition switch off.
    2. Clear the DTCs (See DTC CHECK / CLEAR  ).
    3. Start the engine.
    4. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
    5. Check if the same DTC is recorded (See DTC CHECK / CLEAR  ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTCs (C0200/31 and C0205/32) are not output A
      DTCs (C0200/31 and/or 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 (See PROBLEM SYMPTOMS TABLE  ).

      B: Go to step  13

      A: CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)  (See DIAGNOSIS SYSTEM  )

  7. CHECK FRONT SPEED SENSOR INSTALLATION 
    1. Turn the ignition switch off.
    2. Check the speed sensor installation.

      OK: 

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

      The installation nut is tightened properly  .

      Torque: 8.5 N*m (87 kgf*cm, 75 in.*lbf) 

      NG: INSTALL FRONT SPEED SENSOR CORRECTLY  (See INSTALLATION  )

      Fig 1: Identifying Front Speed Sensor Proper Installation Position
      G05389454Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  8. CHECK FRONT SPEED SENSOR TIP 
    1. Remove the front speed sensor (See REMOVAL  ).
    2. Check the speed sensor tip.

      OK: 

      No scratches, oil or foreign matter on the sensor tip  .

      NOTE: Check the speed sensor signal after cleaning or replacement (See TEST MODE PROCEDURE  ).

      NG: CLEAN OR REPLACE FRONT SPEED SENSOR 

      OK: Go to next step 

  9. INSPECT FRONT SPEED SENSOR 
    1. Install the front speed sensor.
    2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.
    3. Disconnect the front speed sensor connector.
    4. Measure the resistance according to the value(s) in the table below.
      Fig 2: Measuring Front Speed Sensor Resistance
      G05417688Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance: 

      for RH 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      2 (FR+) - Body ground Always 10 kΩ or higher
      1 (FR-) - Body ground Always 10 kΩ or higher

      for LH 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      2 (FL+) - Body ground Always 10 kΩ or higher
      1 (FL-) - Body ground Always 10 kΩ or higher
      NOTE: Check the speed sensor signal after replacement (See TEST MODE PROCEDURE  ).

      NG: REPLACE FRONT SPEED SENSOR  (See REMOVAL  )

      OK: Go to next step 

  10. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR) 
    1. Disconnect the skid control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance: 

      for RH 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      A38-7 (FR+) - A21-2 (FR+) Always Below 1 Ω
      A38-7 (FR+) - Body ground Always 10 kΩ or higher
      A38-6 (FR-) - A21-1 (FR-) Always Below 1 Ω
      A38-6 (FR-) - Body ground Always 10 kΩ or higher

      for LH 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      A38-19 (FL+) - A22-2 (FL+) Always Below 1 Ω
      A38-19 (FL+) - Body ground Always 10 kΩ or higher
      A38-18 (FL-) - A22-1 (FL-) Always Below 1 Ω
      A38-18 (FL-) - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 3: Identifying Skid Control ECU And Front Speed Sensor Connector Terminals
      G06034989Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  11. INSPECT SKID CONTROL ECU (SENSOR INPUT) 
    1. Reconnect the skid control ECU connector.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage: 

      for RH 

      VOLTAGE SPECIFIED CONDITIONS

      Tester Connection Switch Condition Specified Condition
      A21-2 (FR+) - Body ground ignition switch ON 8 to 14 V

      for LH 

      VOLTAGE SPECIFIED CONDITIONS

      Tester Connection Switch Condition Specified Condition
      A22-2 (FL+) - Body ground Ignition switch ON 8 to 14 V
      Fig 4: Identifying Front Speed Sensor Connector Terminals
      G06034885Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPLACE BRAKE ACTUATOR ASSEMBLY  (See REMOVAL  )

      OK: Go to next step 

  12. RECONFIRM DTC 
    1. Turn the ignition switch off.
    2. Reconnect the front speed sensor connector.
    3. Clear the DTCs (See DTC CHECK / CLEAR  ).
    4. Start the engine.
    5. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
    6. Check if the same DTC is recorded (See DTC CHECK / CLEAR  ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTCs (C0200/31 and/or 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 (See PROBLEM SYMPTOMS TABLE  ).

      B: CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)  (See DIAGNOSIS SYSTEM  )

      A: Go to next step 

  13. REPLACE FRONT SPEED SENSOR 
    1. Turn the ignition switch off.
    2. Replace the front speed sensor (See REMOVAL  ).
      NOTE: Check the speed sensor signal after replacement (See TEST MODE PROCEDURE  ).
  14. RECONFIRM DTC 
    1. Clear the DTCs (See DTC CHECK / CLEAR  ).
    2. Start the engine.
    3. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
    4. Check if the same DTC is recorded (See DTC CHECK / CLEAR  ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTCs (C0200/31 and/or 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 (See PROBLEM SYMPTOMS TABLE  ).

      B: END 

      A: Go to next step 

  15. REPLACE FRONT SPEED SENSOR ROTOR 
    1. Turn the ignition switch off.
    2. Remove the front drive shaft assembly (See REMOVAL for 2AZ-FE, or DISASSEMBLY for 2ZR-FE).
    3. Replace the front axle outboard joint shaft assembly (front speed sensor rotor) (See DISASSEMBLY for 2AZ-FE, or REMOVAL for 2ZR-FE).

      HINT:

      If the front speed sensor rotor needs to be replaced, replace it together with the front axle outboard joint shaft assembly.

      NOTE: Check the speed sensor signal after replacement (See TEST MODE PROCEDURE  ).
  16. RECONFIRM DTC 
    1. Install the front drive shaft assembly.
    2. Clear the DTCs (See DTC CHECK / CLEAR  ).
    3. Start the engine.
    4. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
    5. Check if the same DTC is recorded (See DTC CHECK / CLEAR  ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTCs (C0200/31 and C0205/32) are not output A
      DTCs (C0200/31 and/or 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 (See PROBLEM SYMPTOMS TABLE  ).

      B: REPLACE BRAKE ACTUATOR ASSEMBLY  (See REMOVAL  )

      A: END 

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