TOYOTA PARKING ASSIST-SENSOR SYSTEM (for 4 Sensor Type) Back-up Light Circuit

DESCRIPTION

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

WIRING DIAGRAM

A009C32E01

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. INSPECT BACK-UP LIGHT SWITCH ASSEMBLY

    A0094I1

    1. Disconnect the C41 back-up light switch assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 Pushed Below 1 Ω
      1 - 2 Released 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for RA61F) B
      NG (for R150F) C
      NG (for G52F) D

    B

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

    C

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

    D

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH - BATTERY)


    1. A0097FFE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Back-up Light Switch Assembly)

      Disconnect the C41 back-up light switch assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C41-2 - Body ground Ignition switch ON 11 to 14 V
      C41-2 - Body ground Ignition switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the I1 clearance warning ECU connector.

    2. Disconnect the C41 back-up light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I1-13 (RL) - C41-1 (RL) Always Below 1 Ω
      I1-13 (RL) - 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