TOYOTA PARKING ASSIST-SENSOR SYSTEM(w/o Multi-display) Park / Neutral Position Switch Circuit

DESCRIPTION

This circuit sends the park/neutral position switch assembly signals to the clearance warning ECU.

WIRING DIAGRAM

B001EHIE16
*a from ECU-IG NO.1 Fuse
*b Park/Neutral Position Switch Assembly
*c Clearance Warning ECU

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    1. B001DR6E09

      Disconnect the C159 park/neutral position switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (RL) - 2 (RB) Shift lever in R Below 1 Ω
      1 (RL) - 2 (RB) Shift lever not in R 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for A750F) B
      NG (for AC60F) C

    B

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    C

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BATTERY)


    1. B001F91E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Park/Neutral Position Switch Assembly)

      Disconnect the C159 park/neutral position switch assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C159-2 (RB) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the I8 clearance warning ECU connector.

    2. Disconnect the C159 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
      I8-21 (RL) - C159-1 (RL) Always Below 1 Ω
      I8-21 (RL) - Body ground Always 10 kΩ or higher

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR