LEXUS PARKING ASSIST-SENSOR SYSTEM Clearance Sonar Main Switch Circuit

DESCRIPTION

When the back sonar or clearance sonar switch assembly turns on, the ON signal is input into the clearance warning ECU assembly.

WIRING DIAGRAM

A01WPOOE01
*a from IG1 NO.2 Relay
*b ECU-IG NO.3
*c Main Switch Assembly (Clearance Sonar Main Switch)
*d Clearance Warning ECU Assembly

CAUTION / NOTICE / HINT

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

PROCEDURE


  1. READ VALUE USING GTS


    1. Check the Data List for proper functioning of the main switch assembly (clearance sonar main switch) Click here.

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

      OFF: Main switch assembly (clearance sonar main switch) off

      ON: Main switch assembly (clearance sonar main switch) on

      		 -
      OK
      The GTS display changes according to operation of main switch assembly (clearance sonar main switch).

    OK

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

    NG

  2. INSPECT MAIN SWITCH ASSEMBLY (CLEARANCE SONAR MAIN SWITCH)


    1. Remove the main switch assembly (clearance sonar main switch) Click here.

    2. Inspect the main switch assembly (clearance sonar main switch) Click here.


    NG

    REPLACE MAIN SWITCH ASSEMBLY (CLEARANCE SONAR MAIN SWITCH) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (MAIN SWITCH ASSEMBLY [CLEARANCE SONAR MAIN SWITCH] - CLEARANCE WARNING ECU ASSEMBLY AND BATTERY)


    1. Disconnect the E97 main switch assembly (clearance sonar main switch) connector.

    2. Disconnect the F92 clearance warning ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E97-9 (CLSW) - F92-5 (ECU) Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F97-6 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Below 1 V

    OK

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR