LEXUS PARKING ASSIST-SENSOR SYSTEM Clearance Sonar Main Switch Circuit

DESCRIPTION

The clearance sonar main switch is installed in the outer mirror switch assembly. When the clearance sonar main switch turns ON, the ON signal is input into the ECU through the CAN communication line.

WIRING DIAGRAM

A001FRME03

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (MAIN SWITCH)


    1. Use the Data List to check if the clearance sonar main switch is functioning properly.

      Clearance Sonar
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Main Switch Clearance sonar main switch/OFF or ON

      OFF: Clearance sonar main switch OFF

      ON: Clearance sonar main switch ON

      		 -

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. CHECK FUSE (D-IG1-1, D MPX-B 1)


    1. Remove the D-IG1-1 and D MPX-B 1 fuses from the driver side junction block.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D-IG1-1 Always Below 1 Ω
      D MPX-B 1 Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  3. CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH POWER SUPPLY)


    1. A001ATRE01
      *1 Front view of wire harness connector: (to Outer Mirror Switch)

      Disconnect the switch connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L6-1 (E) - Body ground Always Below 1 Ω

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

      Standard voltage
      Tester Connection Condition Specified Condition
      L6-12 (B) - Body ground Always 11 to 14 V
      L6-11 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR