VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1413, C1414

DTC Code DTC Name
C1413 Front Speed Sensor RH Output Malfunction
C1414 Front Speed Sensor LH Output Malfunction

DESCRIPTION

The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU (brake actuator assembly). These signals are used for brake control.

Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change when the rotors turn.

Each speed sensor detects that magnetic change and sends a pulse signal to the skid control ECU (brake actuator assembly).

Tech Tips

When the connectors between the speed sensor and skid control ECU (brake actuator assembly) are connected, the following waveform is output.

B002CURE35
DTC No. Detection Item DTC Detection Condition Trouble Area Note
C1413 Front Speed Sensor RH Output Malfunction

Any of the following is detected:


  • An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more.

  • At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds.

  • At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.

  • Sensor installation

  • Front speed sensor RH (Front axle hub sub-assembly RH)

  • Front speed sensor rotor RH (front axle hub sub-assembly RH)

  • Speed sensor circuit

  • Skid control ECU (brake actuator assembly)

 -
C1414 Front Speed Sensor LH Output Malfunction

Any of the following is detected:


  • An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more.

  • At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds.

  • At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.

  • Sensor installation

  • Front speed sensor LH (Front axle hub sub-assembly LH)

  • Front speed sensor rotor LH (front axle hub sub-assembly LH)

  • Speed sensor circuit

  • Skid control ECU (brake actuator assembly)

 -
C1413 DTC Detection Conditions
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition - - - -
Malfunction Status An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more ○ - -
At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds - ○ -
At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation - - ○
Detection Time - - 15 seconds or more.
Number of Trips 1 trip 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

C1414 DTC Detection Conditions
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition - - - -
Malfunction Status An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more ○ - -
At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds - ○ -
At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation - - ○
Detection Time - - 15 seconds or more.
Number of Trips 1 trip 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

B002EI8E28

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information.

Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)


    1. Using the GTS, check for any momentary interruption in the wire harness and connector corresponding to a DTC.

      Click here


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Speed Sensor Voltage Open Front speed sensor RH voltage open detection Error or Normal

      Error: Momentary interruption

      Normal: Normal

      		 -
      FL Speed Sensor Voltage Open Front speed sensor LH voltage open detection Error or Normal

      Error: Momentary interruption

      Normal: Normal

      		 -

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      FR Speed Sensor Voltage Open
      FL Speed Sensor Voltage Open
      OK
      Normal (There are no momentary interruptions.)

      Tech Tips

      Perform the above inspection before removing the sensor and connector.

      Result
      Result
      OK
      NG

    NG

    CHECK FRONT SPEED SENSOR INSTALLATION Click here

    OK

  2. READ VALUE USING GTS (FRONT SPEED SENSOR)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Start the engine.

    4. Select the Data List using the GTS.

      Click here


      Chassis > ABS/VSC/TRC > Data List
      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) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      FL Wheel Speed Front wheel speed sensor LH reading Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      FR Wheel Speed
      FL Wheel Speed

    5. Check the speed value output from the speed sensor displayed on the GTS.

      Tech Tips

      Factors that affect the indicated vehicle speed include tire size, tire pressure, 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.

      Click here

      OK
      The speed value output from the speed sensor displayed on the GTS is similar to the speed indicated on the speedometer.

      Tech Tips

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

      Click here

      Result
      Result
      OK
      NG

    NG

    GO TO STEP 4 Click here

    OK

  3. RECONFIRM DTC


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the engine switch off.

    3. Start the engine.

    4. Perform a road test.

    5. Check if the same DTC is output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTCs C1413 and C1414 are not output. A
      DTCs C1413 and/or C1414 are output. (for LHD) B
      DTCs C1413 and/or C1414 are output. (for RHD) C

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

  4. CHECK FRONT SPEED SENSOR INSTALLATION


    1. B002ER0C07
      *1 Front Speed Sensor
      *a Correct
      *b Incorrect
      *c No clearance

      Check the speed sensor installation.

      OK
      There is no clearance between the sensor and the front steering knuckle.
      Result
      Proceed to
      OK
      NG

    NG

    INSTALL FRONT SPEED SENSOR CORRECTLY Click here

    OK

  5. INSPECT SKID CONTROL SENSOR WIRE


    1. B002EIEC11
      *a Front view of Skid Control Sensor Wire
      *b

      Front view of wire harness connector

      (to Sensor Side Connector)
      *c

      Front view of wire harness connector

      (to Vehicle Side Connector)
      *d for RH
      *e for LH

      Turn the engine switch off.

    2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

    3. Disconnect the A46, A47, m1 and/or n1 skid control sensor wire connector.

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

      Standard Resistance
      for RH
      Tester Connection Condition Specified Condition
      m1-2 (FR+) - A47-1 (FR+) Always Below 1 Ω
      m1-2 (FR+) - A47-2 (FR-) Always 10 kΩ or higher
      m1-2 (FR+) or A47-1 (FR+) - Body ground Always 10 kΩ or higher
      m1-1 (FR-) - A47-2 (FR-) Always Below 1 Ω
      m1-1 (FR-) - A47-1 (FR+) Always 10 kΩ or higher
      m1-1 (FR-) or A47-2 (FR-) - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      n1-2 (FL+) - A46-1 (FL+) Always Below 1 Ω
      n1-2 (FL+) - A46-2 (FL-) Always 10 kΩ or higher
      n1-2 (FL+) or A46-1 (FL+) - Body ground Always 10 kΩ or higher
      n1-1 (FL-) - A46-2 (FL-) Always Below 1 Ω
      n1-1 (FL-) - A46-1 (FL+) Always 10 kΩ or higher
      n1-1 (FL-) or A46-2 (FL-) - Body ground Always 10 kΩ or higher

      Note

      Check the speed sensor signal after replacement.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SKID CONTROL SENSOR WIRE Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - SKID CONTROL SENSOR WIRE)


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

    2. Reconnect the A46 or A47 skid control sensor wire connector (for vehicle side connector).

    3. Disconnect the A52 skid control ECU (brake actuator assembly) connector.

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

      Standard Resistance
      for RH
      Tester Connection Condition Specified Condition
      A52-31 (FR+) - m1-2 (FR+) Always Below 1 Ω
      A52-31 (FR+) or m1-2 (FR+) - Body ground Always 10 kΩ or higher
      A52-30 (FR-) - m1-1 (FR-) Always Below 1 Ω
      A52-30 (FR-) or m1-1 (FR-) - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      A52-18 (FL+) - n1-2 (FL+) Always Below 1 Ω
      A52-18 (FL+) or n1-2 (FL+) - Body ground Always 10 kΩ or higher
      A52-17 (FL-) - n1-1 (FL-) Always Below 1 Ω
      A52-17 (FL-) or n1-1 (FL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT BRAKE ACTUATOR ASSEMBLY (SENSOR INPUT)


    1. B002CH2C58
      *a

      Front view of wire harness connector

      (to Sensor Side Connector)
      *b for RH
      *c for LH

      Reconnect the A52 skid control ECU (brake actuator assembly) connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      for RH
      Tester Connection Switch Condition Specified Condition
      m1-2 (FR+) - Body ground Engine switch on (IG) 11 to 14 V
      for LH
      Tester Connection Switch Condition Specified Condition
      n1-2 (FL+) - Body ground Engine switch on (IG) 11 to 14 V

      Tech Tips

      The front speed sensor rotor and front speed sensor are incorporated into the front axle hub sub-assembly.

      If the front speed sensor rotor needs to be replaced, replace the front axle hub sub-assembly with front speed sensor.

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    REPLACE FRONT AXLE HUB SUB-ASSEMBLY Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here