ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1413, C1414

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

DESCRIPTION

Each speed sensor detects the wheel speed and sends the signals to the skid control ECU (brake booster with master cylinder assembly). These signals are used for ABS control.

Tech Tips

The output voltage values shown below are for when the vehicle wire harnesses are connected to the skid control ECU (brake booster with master cylinder assembly) and the speed sensors.

A003L8NE15
DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1413 Front Speed Sensor RH Circuit Output

504

541

  • INF Code: 504


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

  • INF Code: 541


    • Either of the following is detected:


      1. 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.

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

  • Front speed sensor RH

  • Speed sensor installed improperly

  • Wire harness or connector

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

  • Skid control ECU (brake booster with master cylinder assembly)

 ABS DTC
C1414 Front Speed Sensor LH Circuit Output

514

542

  • INF Code: 514


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

  • INF Code: 542


    • Either of the following is detected:


      1. 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.

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

  • Front speed sensor LH

  • Speed sensor installed improperly

  • Wire harness or connector

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

  • Skid control ECU (brake booster with master cylinder assembly)

 ABS DTC
DTC Detection Conditions: C1413 INF Code: 541
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition At a vehicle speed of 20 km/h (12 mph) or more. ○ -
At a vehicle speed of 10 km/h (6 mph) or more. - ○
Malfunction Status Noise occurs in the sensor signals of a malfunctioning wheel. ○ -
Noise occurs once per rotor rotation. - ○
Detection Time Detected 75 times or more within 5 seconds 15 seconds or more
Number of Trips 1 trip 1 trip

Tech Tips

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

DTC Detection Conditions: C1414 INF Code: 542
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition At a vehicle speed of 20 km/h (12 mph) or more. ○ -
At a vehicle speed of 10 km/h (6 mph) or more. - ○
Malfunction Status Noise occurs in the sensor signals of a malfunctioning wheel. ○ -
Noise occurs once per rotor rotation. - ○
Detection Time Detected 75 times or more within 5 seconds 15 seconds or more
Number of Trips 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

A003P6XE06

CAUTION / NOTICE / HINT

Note

After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

Click here

PROCEDURE


  1. READ VALUE USING GTS (MOMENTARY INTERRUPTION)


    1. Using the GTS, check for any momentary interruptions 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

    2. Check for any momentary interruptions in the wire harness and connectors.

      OK
      There are no momentary interruptions.

      Note

      Perform the above inspection before removing the sensor and connector.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK FRONT SPEED SENSOR INSTALLATION Click here

    OK

  2. READ VALUE USING GTS (FRONT SPEED SENSOR)


    1. Select the Data List on the GTS.

      Click here


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Wheel Speed Front speed sensor RH Min.: 0 km/h (0 mph), Max.: 326.4 km/h (203 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      FL Wheel Speed Front speed sensor LH Min.: 0 km/h (0 mph), Max.: 326.4 km/h (203 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

    2. Check the speed sensor output value.

      OK
      The output value changes in accordance with the vehicle speed.
      Result
      Proceed to
      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 power switch off.

    3. Turn the power switch on (READY).

    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. B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY for LHD: Click here
    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY for RHD: Click here

  4. CHECK FRONT SPEED SENSOR INSTALLATION


    1. A003O7RC29
      *1 Front Speed Sensor
      *a OK
      *b NG
      *c 8.5 N*m
      *d No Clearance

      Turn the power switch off.

    2. Check the speed sensor installation.

      OK
      There is no clearance between the sensor and the front steering knuckle.
      The installation bolt is tightened properly.
      Torque
      8.5 N*m (87 kgf*cm, 75 in.*lbf)
      Result
      Proceed to
      OK
      NG

    NG

    REINSTALL OR REPLACE FRONT SPEED SENSOR Click here

    OK

  5. CHECK FRONT SPEED SENSOR AND SENSOR ROTOR (CHECK FOR FOREIGN MATTER)


    1. Remove the front speed sensor and the component with the speed sensor rotor.

      for Speed Sensor: Click here

      for Speed Sensor Rotor: Click here

    2. Check the speed sensor tip and speed sensor rotor.

      OK
      The sensor tip and rotor are free of scratches, oil, and foreign matter.

      Note


      • If there is oil or foreign matter on the speed sensor, clean the speed sensor and then check the sensor rotor.

      • If the speed sensor is damaged, replace the speed sensor with a new one.

      • Check the speed sensor signal after cleaning or replacement.

        Click here

      Result
      Proceed to
      OK
      NG

    NG

    CLEAN OR REPLACE FRONT SPEED SENSOR AND SENSOR ROTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - FRONT SPEED SENSOR)


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

      OK
      The connector is securely connected.

    2. Disconnect the A32 skid control ECU (brake booster with master cylinder assembly) connector.

    3. Disconnect the A63 or A62 front speed sensor connector.

    4. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Resistance
      for RH
      Tester Connection Condition Specified Condition
      A32-3 (FR+) - A63-1 (FR+) Always Below 1 Ω
      A32-3 (FR+) or A63-1 (FR+) - Body ground Always 10 kΩ or higher
      A32-4 (FR-) - A63-2 (FR-) Always Below 1 Ω
      A32-4 (FR-) or A63-2 (FR-) - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      A32-31 (FL+) - A62-1 (FL+) Always Below 1 Ω
      A32-31 (FL+) or A62-1 (FL+) - Body ground Always 10 kΩ or higher
      A32-32 (FL-) - A62-2 (FL-) Always Below 1 Ω
      A32-32 (FL-) or A62-2 (FL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SENSOR OUTPUT)


    1. A003NSBC25
      *A for RH
      *B for LH
      *a

      Front view of wire harness connector

      (to Front Speed Sensor)

      Reconnect the A32 skid control ECU (brake booster with master cylinder assembly) connector.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      for RH
      Tester Connection Condition Specified Condition
      A63-1 (FR+) - Body ground Power switch on (IG) 8 to 14 V
      for LH
      Tester Connection Condition Specified Condition
      A62-1 (FL+) - Body ground Power switch on (IG) 8 to 14 V

      Note

      Check the speed sensor signal after replacement.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT SPEED SENSOR Click here

    NG

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY for LHD: Click here
    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY for RHD: Click here