TOYOTA PARKING ASSIST-SENSOR SYSTEM(for Sedan without Simple Intelligent Parking Assist System) Reverse Signal Circuit

DTC Code DTC Name
Reverse Signal Circuit

DESCRIPTION

The clearance warning ECU assembly receives a reverse signal from the back-up light switch assembly. (for MT or MMT)

WIRING DIAGRAM

E226161E23

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (REVERSE SIGNAL)

    1. Disconnect the E98 clearance warning ECU assembly connector.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      E98-32 (RL) - Body ground

      Ignition switch ON, shift lever in R

      11 to 14 V

      Ignition switch ON, shift lever in any position other than R

      Below 1 V

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

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

    1. Disconnect the E98 clearance warning ECU assembly connector.

    2. Disconnect the B38*1 or A102*2 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

      E98-32 (RL) - B38-1*1

      Always

      Below 1 Ω

      E98-32 (RL) - A102-1 (RL)*2

      Always

      Below 1 Ω

      E98-32 (RL) - Body ground

      Always

      10 kΩ or higher

      • *1: for MT

      • *2: for MMT

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH ASSEMBLY POWER SOURCE)

    1. Disconnect the B38*1 or A102*2 back-up light switch assembly connector.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      B38-2 - Body ground*1

      Ignition switch ON

      11 to 14 V

      A102-2 (RB) - Body ground*2

      Ignition switch ON

      11 to 14 V

      • *1: for MT

      • *2: for MMT

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY

    for EC60:Click here

    for EC61:Click here

    for EC65A:Click hereClick here

    for EC69:Click hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR