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

A005WC3E02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CLEARANCE WARNING ECU (REVERSE SIGNAL)

    A005T8GE01
    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 Switch 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 CVT) B
      NG (for Manual Transaxle) C

    B

    CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - PARK/NEUTRAL POSITION SWITCH) Click here

    C

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

    A

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

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

    A005TO2E01
    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
      Result
      Result Proceed to
      OK (for K111) A
      OK (for K311) B
      NG C

    B

    REPLACE PARK/NEUTRAL POSITION SWITCH Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE PARK/NEUTRAL POSITION SWITCH Click here

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

    A005TM8E01
    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 EC60) A
      OK (for EB60) B
      NG C

    B

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here