LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2020 >> ES 300h Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 173 (Electronically Controlled Brake System (Except Hybrid) - Diagnostic Codes (1 Of 4)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model) >> DTC C050C-12: Left Rear Wheel Speed Sensor Circuit Short to Battery [08/2020 - ] >> Procedure

DTC C050C-12: Left Rear Wheel Speed Sensor Circuit Short to Battery [08/2020 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 250, 2023 Lexus ES 350, 2023 Lexus ES 250, and 2022 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK VEHICLE 
    1. Check the vehicle specification.

      Result

      Result Proceed to
      for 2WD (w/o AVS) A
      for 2WD (w/ AVS) B
      for AWD C

    Result: 

    B 

    See step  6

    Result: 

    C 

    See step  10

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT) 
    1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.
      GTY806193Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of skid control sensor wire LH (No. 2 parking brake wire assembly)
      (to Rear Speed Sensor LH (Rear Axle Hub and Bearing Assembly LH))

      OK

      The connector is securely connected.

    2. Disconnect the b4 rear speed sensor LH (rear axle hub and bearing assembly LH) connector.
    3. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    4. Turn the engine switch on (IG).
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      b4-2 (LA+) - b4-1 (LA-) Engine switch on (IG) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT) 
    1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.
      GTY784757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly))

      OK

      The connector is securely connected.

    2. Disconnect the bN2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
    3. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    4. Turn the engine switch on (IG).
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      bN2-1 (RL+) - bN2-2 (RL-) Engine switch on (IG) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY 

    Result: 

    NG 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) 
    1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.
      GTY784758Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly))

      OK

      The connector is securely connected.

    2. Disconnect the A40 skid control ECU (brake actuator assembly) connector.
    3. Disconnect the bN2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
    4. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

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

      Standard Voltage

      Tester Connection Condition Specified Condition
      bN2-2 (RL-) - Body ground Always Below 1.5 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) 
    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 A40 skid control ECU (brake actuator assembly) connector.
    3. Disconnect the bN2 skid control sensor wire LH (No. 2 parking brake wire assembly) 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

      Tester Connection Condition Specified Condition
      bN2-1 (RL+) or A40-39 (RL+) - bN2-2 (RL-) or A40-23 (RL-) Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  6. CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT) 
    1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.
      GTY806193Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of skid control sensor wire LH (No. 2 parking brake wire assembly)
      (to Rear Speed Sensor LH (Rear Axle Hub and Bearing Assembly LH))

      OK

      The connector is securely connected.

    2. Disconnect the b4 rear speed sensor LH (rear axle hub and bearing assembly LH) connector.
    3. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    4. Turn the engine switch on (IG).
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      b4-2 (LA+) - b4-1 (LA-) Engine switch on (IG) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT) 
    1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.
      GTY778878Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly))

      OK

      The connector is securely connected.

    2. Disconnect the bN6 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
    3. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    4. Turn the engine switch on (IG).
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      bN6-1 (RL+) - bN6-2 (RL-) Engine switch on (IG) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY 

    Result: 

    NG 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) 
    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.

      GTY828107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly))
    2. Disconnect the A40 skid control ECU (brake actuator assembly) connector.
    3. Disconnect the bN6 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
    4. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

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

      Standard Voltage

      Tester Connection Condition Specified Condition
      bN6-2 (RL-) - Body ground Always Below 1.5 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) 
    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 A40 skid control ECU (brake actuator assembly) connector.
    3. Disconnect the bN6 skid control sensor wire LH (No. 2 parking brake wire assembly) 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

      Tester Connection Condition Specified Condition
      bN6-1 (RL+) or A40-39 (RL+) - bN6-2 (RL-) or A40-23 (RL-) Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  10. CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT) 
    1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.
      GTY806193Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of skid control sensor wire LH (No. 2 parking brake wire assembly)
      (to Rear Speed Sensor LH)

      OK

      The connector is securely connected.

    2. Disconnect the b4 rear speed sensor LH connector.
    3. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    4. Turn the engine switch on (IG).
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      b4-2 (LA+) - b4-1 (LA-) Engine switch on (IG) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE REAR SPEED SENSOR LH. Refer to  REMOVAL [08/2020 - ] 

    Result: 

    NG 

    See step  3

scientia non olet · About LEMON Manuals