TOYOTA PARKING ASSIST-SENSOR SYSTEM(w/o Multi-display) Back-up Light Circuit

DESCRIPTION

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

WIRING DIAGRAM

B001EHIE13
*a from ECU-IG NO.1 Fuse
*b Back-up Light Switch Assembly
*c Clearance Warning ECU

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. INSPECT BACK-UP LIGHT SWITCH ASSEMBLY

    A01XD4Z

    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. A01XES9E02
      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

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR