TOYOTA PARKING ASSIST-SENSOR SYSTEM Back-up Light Circuit

DESCRIPTION

This circuit sends the back-up light switch assembly signals to the rear clearance warning ECU assembly.

WIRING DIAGRAM

A01J4PWE14

INSPECTION PROCEDURE

PROCEDURE


  1. SELECT ENGINE TYPE


    1. Select the engine type.

      Result
      Result Proceed to
      1GR - FE A
      2TR - FE B

    B

    INSPECT BACK-UP LIGHT SWITCH ASSEMBLY Click here

    A

  2. INSPECT BACK-UP LIGHT SWITCH ASSEMBLY


    1. A01J6MKE02

      Disconnect the B1 back-up light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Shift lever on R Below 1 Ω
      1 - 2 Shift lever not on R 10 kΩ or higher

    NG

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH ASSEMBLY - REAR CLEARANCE WARNING ECU ASSEMBLY)


    1. A01J4TZE02

      Disconnect the B1 back-up light switch assembly connector.

    2. A01J5BQE74

      Disconnect the C25 rear clearance warning ECU assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B1-2 - Body ground Ignition switch ON 11 to 14 V
      B1-2 - Body ground Ignition switch off Below 1 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B1-1 - C25-13 (RL) Always Below 1 Ω
      B1-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  4. INSPECT BACK-UP LIGHT SWITCH ASSEMBLY


    1. A01J5YGE02

      Disconnect the B1 back-up light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Shift lever on R Below 1 Ω
      1 - 2 Shift lever not on R 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (R150) B
      NG (R150F) C

    B

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

    C

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

    A

  5. CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH ASSEMBLY - REAR CLEARANCE WARNING ECU ASSEMBLY)


    1. A01J3HFE02

      Disconnect the B1 back-up light switch assembly connector.

    2. A01J5BQE75

      Disconnect the C25 rear clearance warning ECU assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B1-2 - Body ground Ignition switch ON 11 to 14 V
      B1-2 - Body ground Ignition switch off Below 1 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B1-1 - C25-13 (RL) Always Below 1 Ω
      B1-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here