TOYOTA PARKING ASSIST-SENSOR SYSTEM(w/ Multi-display) Reverse Signal Circuit

DESCRIPTION

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


WIRING DIAGRAM

B001FPDE08
A01XI7OE09

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK CLEARANCE WARNING ECU


    1. A01XMN0E01
      Text in Illustration
      *A for 4 Sensor Type
      *B for 8 Sensor Type
      *a

      Front view of wire harness connector

      (to Clearance Warning ECU)

      Disconnect the clearance warning ECU connector.

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

      Standard Voltage
      for 4 Sensor Type
      Tester Connection Condition Specified Condition
      I1-8 (RL) - Body ground

      Engine switch on (IG)

      Shift lever in R

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

      Engine switch on (IG)

      Shift lever in any position except R

      		 Below 1 V
      for 8 Sensor Type
      Tester Connection Condition Specified Condition
      G154-8 (RL) - Body ground

      Engine switch on (IG)

      Shift lever in R

      		 11 to 14 V
      G154-8 (RL) - Body ground

      Engine switch on (IG)

      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

    A

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

    C

    INSPECT BACK-UP LIGHT SWITCH ASSEMBLY Click here

    B

  2. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    1. Remove the park/neutral position switch assembly.


    2. Inspect the park/neutral position switch assembly.


      Result
      Result Proceed to
      OK A
      NG (for AC60F) B
      NG (for A750F) C

    B

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    C

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    A

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


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

    2. Disconnect the I1*1 or G154*2 clearance warning ECU connector.


      • *1: for 4 Sensor Type

      • *2: for 8 Sensor Type

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C40-2 (RB) - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      for 4 Sensor Type
      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
      for 8 Sensor Type
      Tester Connection Condition Specified Condition
      G154-8 (RL) - C40-1 (RL) Always Below 1 Ω
      G154-8 (RL) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

    REPLACE CLEARANCE WARNING ECU Click here

    B

    REPLACE CLEARANCE WARNING ECU Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT BACK-UP LIGHT SWITCH ASSEMBLY


    1. Remove the back-up light switch assembly.


    2. Inspect the back-up light switch assembly.


      Result
      Result Proceed to
      OK A
      NG (for R150F) B
      NG (for RA61F) 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

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


    1. Disconnect the C41 back-up light switch assembly connector.

    2. Disconnect the I1*1 or G154*2 clearance warning ECU connector.


      • *1: for 4 Sensor Type

      • *2: for 8 Sensor Type

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C41-2 - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      for 4 Sensor Type
      Tester Connection Condition Specified Condition
      I1-8 (RL) - C41-1 Always Below 1 Ω
      I1-8 (RL) - Body ground Always 10 kΩ or higher
      for 8 Sensor Type
      Tester Connection Condition Specified Condition
      G154-8 (RL) - C41-1 Always Below 1 Ω
      G154-8 (RL) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

    REPLACE CLEARANCE WARNING ECU Click here

    B

    REPLACE CLEARANCE WARNING ECU Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR