TOYOTA PARKING ASSIST-SENSOR SYSTEM Reverse Signal Circuit

DESCRIPTION

The clearance warning ECU receives a reverse signal from the park/neutral position switch*1 or back-up light switch*2.


WIRING DIAGRAM

A004OX9E08

PROCEDURE


  1. CHECK CLEARANCE WARNING ECU (REVERSE SIGNAL)

    A004OO6E02
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Clearance Warning ECU)

    1. Disconnect the D65 ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D65-8 (RL) - Body ground Ignition switch ON, shift lever in R 11 to 14 V
      D65-8 (RL) - Body ground Ignition switch ON, shift lever not in R Below 1 V
      Result
      Result Proceed to
      OK A
      NG (for Automatic Transaxle) B
      NG (for Manual Transaxle) C

    A

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

    C

    CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - BACK-UP LIGHT SWITCH) Click here

    B

  2. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - PARK/NEUTRAL POSITION SWITCH)

    A004TQYE02
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Clearance Warning ECU)
    *2

    Front view of wire harness connector

    (to Park/Neutral Position Switch)

    1. Disconnect the D65 ECU connector.

    2. Disconnect the B14 switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D65-8 (RL) - B14-2 (RL) Always Below 1 Ω
      D65-8 (RL) - Body ground Always 10 kΩ or higher

    OK

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    A004P3SE02
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Clearance Warning ECU)
    *2

    Front view of wire harness connector

    (to Back-up Light Switch)

    1. Disconnect the D65 ECU connector.

    2. Disconnect the B5 switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D65-8 (RL) - B5-1 (RL) Always Below 1 Ω
      D65-8 (RL) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for EA62) A
      OK (for EA63) B
      OK (for EA65) C
      NG D

    A

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

    B

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

    C

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

    D

    REPAIR OR REPLACE HARNESS OR CONNECTOR