TOYOTA PARKING ASSIST-SENSOR SYSTEM(for 4 Sensor Type) Reverse Signal Circuit

DESCRIPTION

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


WIRING DIAGRAM

A01QR5RE01
except Manual Transaxle
*a IG1 NO.2 Relay
*b GAUGE
*c Park/Neutral Position Switch Assembly
*d Clearance Warning ECU Assembly
A01QR5RE02
for Manual Transaxle
*a IG1 NO.2 Relay
*b GAUGE
*c Back-up Light Switch Assembly
*d Clearance Warning ECU Assembly

PROCEDURE


  1. CHECK CLEARANCE WARNING ECU ASSEMBLY (REVERSE SIGNAL)


    1. Disconnect the G33 clearance warning ECU assembly connector.

    2. A01QTLTC02
      *a

      Front view of wire harness connector

      (to Clearance Warning ECU Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G33-21 (RL) - Body ground

      Ignition switch ON

      Shift lever in R

      		 11 to 14 V
      G33-21 (RL) - Body ground

      Ignition switch ON

      Shift lever in any position except R

      		 Below 1 V
      Result
      Result
      OK
      NG (except Manual Transaxle)
      NG (for Manual Transaxle)

    OK

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

    NG (for Manual Transaxle)

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

    NG (except Manual Transaxle)

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


    1. Disconnect the G33 clearance warning ECU assembly connector.

    2. Disconnect the B36 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
      G33-21 (RL) - B36-2 Always Below 1 Ω
      G33-21 (RL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY for U660F: Click here for U760E: Click here for U760F: Click here for K111: Click here for K111F: Click here for K114F: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Disconnect the G33 clearance warning ECU assembly connector.

    2. Disconnect the B35 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
      G33-21 (RL) - B35-1 Always Below 1 Ω
      G33-21 (RL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY for EA64: Click here for EA64F: Click here for EB61: Click here for EB61F: Click here for EB63: Click here for EB63F: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR