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

DTC Code DTC Name
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.

  • *1: except Manual Transaxle

  • *2: for Manual Transaxle

WIRING DIAGRAM

E270560E01
E270560E02

PROCEDURE

  1. CHECK CLEARANCE WARNING ECU ASSEMBLY (REVERSE SIGNAL)

    1. Disconnect the G33 clearance warning ECU assembly connector.

    2. E270561C02

      *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

    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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR