TOYOTA PARKING ASSIST-SENSOR SYSTEM(for Sedan without Simple Intelligent Parking Assist System) Reverse Signal Circuit

DESCRIPTION

The clearance warning ECU assembly receives a reverse signal from the back-up light switch assembly. (for MT or MMT)

WIRING DIAGRAM

B004297E23

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (REVERSE SIGNAL)


    1. Disconnect the E98 clearance warning ECU assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E98-32 (RL) - Body ground Ignition switch ON, shift lever in R 11 to 14 V
      Ignition switch ON, shift lever in any position other than R Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

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


    1. Disconnect the E98 clearance warning ECU assembly connector.

    2. Disconnect the B38*1 or A102*2 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
      E98-32 (RL) - B38-1*1 Always Below 1 Ω
      E98-32 (RL) - A102-1 (RL)*2 Always Below 1 Ω
      E98-32 (RL) - Body ground Always 10 kΩ or higher

      • *1: for MT

      • *2: for MMT

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH ASSEMBLY POWER SOURCE)


    1. Disconnect the B38*1 or A102*2 back-up light switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      B38-2 - Body ground*1 Ignition switch ON 11 to 14 V
      A102-2 (RB) - Body ground*2 Ignition switch ON 11 to 14 V

      • *1: for MT

      • *2: for MMT

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY for EC60: Click here
    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY for EC61: Click here
    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY for EC65A: Click here
    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY for EC69: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR