TOYOTA PARKING ASSIST-SENSOR SYSTEM (for 8 Sensor Type) Reverse Signal Circuit

DESCRIPTION

The clearance warning ECU*1 or parking assist ECU*2 receives a reverse shift position signal from the park/neutral position switch assembly*3 or back-up light switch assembly*4.


WIRING DIAGRAM

A0094PZE02
A0094PZE03

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK PARKING ASSIST MONITOR SYSTEM


    1. Check if the parking assist monitor system is installed.

      Result
      Result Proceed to
      w/o Parking Assist Monitor System and/or Side Monitor System A
      w/ Parking Assist Monitor System and/or Side Monitor System B

    B

    CHECK PARKING ASSIST ECU Click here

    A

  2. CHECK CLEARANCE WARNING ECU


    1. A0096J0E06
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Clearance Warning ECU)

      Disconnect the I1 clearance warning ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I1-8 (RL) - Body ground

      Ignition switch ON

      Shift lever in R

      		 11 to 14 V
      I1-8 (RL) - Body ground

      Ignition switch ON

      Shift lever in any position except R

      		 Below 1 V
      Result
      Result Proceed to
      OK A
      NG (for Automatic Transmission) B
      NG (for Manual Transmission) 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

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


    1. Disconnect the I1 clearance warning ECU connector.

    2. Disconnect the C40 park/neutral position switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I1-8 (RL) - C40-1 (RL) Always Below 1 Ω
      I1-8 (RL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

  4. 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
      I1-8 (RL) - C41-1 (RL) Always Below 1 Ω
      I1-8 (RL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

  5. CHECK PARKING ASSIST ECU


    1. A009BD6E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Parking Assist ECU)

      Disconnect the I3 parking assist ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I3-15 (REV) - Body ground

      Ignition switch ON

      Shift lever in R

      		 11 to 14 V
      I3-15 (REV) - Body ground

      Ignition switch ON

      Shift lever in any position except R

      		 Below 1 V
      Result
      Result Proceed to
      OK A
      NG (for Automatic Transmission) B
      NG (for Manual Transmission) C

    B

    CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - PARK/NEUTRAL POSITION SWITCH) Click here

    C

    CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BACK-UP LIGHT SWITCH) Click here

    A

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

  6. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - PARK/NEUTRAL POSITION SWITCH)


    1. Disconnect the I3 parking assist ECU connector.

    2. Disconnect the C40 park/neutral position switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I3-15 (REV) - C40-1 (RL) Always Below 1 Ω
      I3-15 (REV) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

  7. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BACK-UP LIGHT SWITCH)


    1. Disconnect the I3 parking assist 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
      I3-15 (REV) - C41-1 (RL) Always Below 1 Ω
      I3-15 (REV) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here