ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1407, C1408

DTC Code DTC Name
C1407 Open or Short in Rear Speed Sensor RH Circuit
C1408 Open or Short in Rear Speed Sensor LH Circuit

DESCRIPTION

Refer to DTCs C1415 and C1416.

Click here

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1407 Open or Short in Rear Speed Sensor RH Circuit

523

526

528

  • INF Code: 523


    • An open in the speed sensor signal circuit continues for 0.5 seconds or more.

  • INF Code: 526


    • The speed sensor power source voltage is low for 0.5 seconds or more.

  • INF Code: 528


    • The speed sensor power source voltage is low for 0.2 seconds, and does not return to normal for 60 seconds or more.

  • Skid control sensor wire RH

  • Rear speed sensor RH (rear axle hub and bearing assembly RH)

  • Wire harness or connector

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

 ABS DTC
C1408 Open or Short in Rear Speed Sensor LH Circuit

533

536

538

  • INF Code: 533


    • An open in the speed sensor signal circuit continues for 0.5 seconds or more.

  • INF Code: 536


    • The speed sensor power source voltage is low for 0.5 seconds or more.

  • INF Code: 538


    • The speed sensor power source voltage is low for 0.2 seconds, and does not return to normal for 60 seconds or more.

  • Skid control sensor wire LH

  • Rear speed sensor LH (rear axle hub and bearing assembly LH)

  • Wire harness or connector

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

 ABS DTC

WIRING DIAGRAM

Refer to DTCs C1415 and C1416.

Click here

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

  • Disassembly of the rear speed sensor from the rear axle hub and bearing assembly is prohibited.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.


      Chassis > ABS/VSC/TRC > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK DTC


    1. Turn the power switch off.

    2. Turn the power switch on (IG).

    3. Check if the same DTC is output.


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      C1407 is output A
      C1408 is output B

    B

    READ VALUE USING GTS (MOMENTARY INTERRUPTION) Click here

    A

  3. 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.


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      RR Speed Open Rear speed sensor RH open detection Error or Normal

      Error: Momentary interruption

      Normal: Normal

      		 -

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      RR Speed Open

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

      Note

      Perform the above inspection before removing the sensor and connector.

      Result
      Result Proceed to
      The value of RR Speed Open is always Normal A
      The value of RR Speed Open outputs Error one or more times B

    B

    INSPECT SKID CONTROL SENSOR WIRE RH Click here

    A

  4. READ VALUE USING GTS (REAR SPEED SENSOR RH)


    1. Select the Data List on the GTS.


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      RR Wheel Speed Rear 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

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

    2. Check the rear speed sensor RH output value.

      Result
      Result Proceed to
      The value of RR Wheel Speed changes in accordance with the vehicle speed A
      Other than above B

    B

    GO TO STEP 7 Click here

    A

  5. CLEAR DTC


    1. Clear the DTCs.


      Chassis > ABS/VSC/TRC > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  6. RECONFIRM DTC


    1. Turn the power switch off.

    2. Turn the power switch on (READY).

    3. Perform a road test.

    4. Check if the same DTC is output.


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      C1407 is not output A
      C1407 is 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

  7. INSPECT SKID CONTROL SENSOR WIRE RH


    1. B004OSYC27
      *a Front view of skid control sensor wire RH
      *b

      Front view of wire harness connector

      (to Sensor Side Connector)
      *c

      Front view of wire harness connector

      (to Vehicle Side Connector)

      Turn the power switch off.

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

      OK
      The connector is securely connected.

    3. Remove the skid control sensor wire RH.

    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
      Tester Connection Condition Specified Condition
      g1-2 (RR+) - gM1 -1 (RR+) Always Below 1 Ω
      g1-2 (RR+) - gM1 -2 (RR-) Always 10 kΩ or higher
      g1-2 (RR+) or gM1 -1 (RR+) - Body ground Always 10 kΩ or higher
      g1-1 (RR-) - gM1 -2 (RR-) Always Below 1 Ω
      g1-1 (RR-) - gM1 -1 (RR+) Always 10 kΩ or higher
      g1-1 (RR-) or gM1 -2 (RR-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SKID CONTROL SENSOR WIRE RH

    OK

  8. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - SKID CONTROL SENSOR WIRE RH)


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

      OK
      The connector is securely connected.

    2. Disconnect the A41 skid control ECU (brake booster with master cylinder assembly) connector.

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

      OK
      No deformation or corrosion.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A41-7 (RR+) - gM1 -1 (RR+) Always Below 1 Ω
      A41-7 (RR+) or gM1 -1 (RR+) - Body ground Always 10 kΩ or higher
      A41-8 (RR-) - gM1 -2 (RR-) Always Below 1 Ω
      A41-8 (RR-) or gM1 -2 (RR-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. B004PV9C01
      *a

      Front view of wire harness connector

      (to Skid Control Sensor Wire RH)

      Reconnect the A41 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
      Tester Connection Condition Specified Condition
      gM1 -1 (RR+) - Body ground Power switch on (IG) 8 to 14 V

      Note

      Check the rear speed sensor RH signal after replacement.

      Click here

      Tech Tips

      The rear speed sensor RH and rear speed sensor rotor RH are incorporated into the rear axle hub and bearing assembly RH.

      If the rear speed sensor RH and rear speed sensor rotor RH need to be replaced, replace the rear axle hub and bearing assembly RH.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR AXLE HUB AND BEARING ASSEMBLY RH 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

  10. 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.


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      RL Speed Open Rear speed sensor LH open detection Error or Normal

      Error: Momentary interruption

      Normal: Normal

      		 -

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      RL Speed Open

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

      Note

      Perform the above inspection before removing the sensor and connector.

      Result
      Result Proceed to
      The value of RL Speed Open is always Normal A
      The value of RL Speed Open outputs Error one or more times B

    B

    INSPECT SKID CONTROL SENSOR WIRE LH Click here

    A

  11. READ VALUE USING GTS (REAR SPEED SENSOR LH)


    1. Select the Data List on the GTS.


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      RL Wheel Speed Rear 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
      RL Wheel Speed

    2. Check the rear speed sensor LH output value.

      Result
      Result Proceed to
      The value of RL Wheel Speed changes in accordance with the vehicle speed A
      Other than above B

    B

    GO TO STEP 14 Click here

    A

  12. CLEAR DTC


    1. Clear the DTCs.


      Chassis > ABS/VSC/TRC > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  13. RECONFIRM DTC


    1. Turn the power switch off.

    2. Turn the power switch on (READY).

    3. Perform a road test.

    4. Check if the same DTC is output.


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      C1408 is not output A
      C1408 is 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

  14. INSPECT SKID CONTROL SENSOR WIRE LH


    1. B004OSYC40
      *a Front view of skid control sensor wire LH
      *b

      Front view of wire harness connector

      (to Sensor Side Connector)
      *c

      Front view of wire harness connector

      (to Vehicle Side Connector)

      Turn the power switch off.

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

      OK
      The connector is securely connected.

    3. Remove the skid control sensor wire LH.

    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
      Tester Connection Condition Specified Condition
      f1-2 (RL+) - fM1 -1 (RL+) Always Below 1 Ω
      f1-2 (RL+) - fM1 -2 (RL-) Always 10 kΩ or higher
      f1-2 (RL+) or fM1 -1 (RL+) - Body ground Always 10 kΩ or higher
      f1-1 (RL-) - fM1 -2 (RL-) Always Below 1 Ω
      f1-1 (RL-) - fM1 -1 (RL+) Always 10 kΩ or higher
      f1-1 (RL-) or fM1 -2 (RL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SKID CONTROL SENSOR WIRE LH

    OK

  15. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - SKID CONTROL SENSOR WIRE LH)


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

      OK
      The connector is securely connected.

    2. Disconnect the A41 skid control ECU (brake booster with master cylinder assembly) connector.

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

      OK
      No deformation or corrosion.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A41-34 (RL+) - fM1 -1 (RL+) Always Below 1 Ω
      A41-34 (RL+) or fM1 -1 (RL+) - Body ground Always 10 kΩ or higher
      A41-35 (RL-) - fM1 -2 (RL-) Always Below 1 Ω
      A41-35 (RL-) or fM1 -2 (RL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. B004PV9C02
      *a

      Front view of wire harness connector

      (to Skid Control Sensor Wire LH)

      Reconnect the A41 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
      Tester Connection Condition Specified Condition
      fM1 -1 (RL+) - Body ground Power switch on (IG) 8 to 14 V

      Note

      Check the rear speed sensor LH signal after replacement.

      Click here

      Tech Tips

      The rear speed sensor LH and rear speed sensor rotor LH are incorporated into the rear axle hub and bearing assembly LH.

      If the rear speed sensor LH and rear speed sensor rotor LH need to be replaced, replace the rear axle hub and bearing assembly LH.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH 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