LEXUS PARKING ASSIST-SENSOR SYSTEM Clearance Sonar Main Switch Circuit

DESCRIPTION

The combination switch assembly (clearance sonar main switch) is installed at the base of the driver side of the lower instrument panel finish panel sub-assembly.

When the combination switch assembly (clearance sonar main switch) is turned on, an on signal is sent to the clearance warning ECU assembly. The LEXUS parking assist-sensor system operates according to this signal.

WIRING DIAGRAM

B002KUKE02
*a from IG1 NO.2 Relay
*b ECU-IG NO.2
*c Combination Switch Assembly (Clearance Sonar Main Switch)
*d Clearance Warning ECU Assembly

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Clearance Sonar / Data List.

    5. According to the display on the GTS, read the Data List.


      Body Electrical > Clearance Sonar > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Main Switch Combination switch assembly (clearance sonar main switch) OFF or ON

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

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

      		 -

      Body Electrical > Clearance Sonar > Data List
      Tester Display
      Main Switch
      Result
      Result Proceed to
      The display does not change as shown above when the combination switch assembly (clearance sonar main switch) is operated. A
      The display changes as shown above when the combination switch assembly (clearance sonar main switch) is operated. B

    B

    REPLACE CLEARANCE WARNING ECU ASSEMBLY for LHD REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here
    REPLACE CLEARANCE WARNING ECU ASSEMBLY for RHD REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    A

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


    1. Remove the combination switch assembly (clearance sonar main switch).

      Click here

    2. Inspect the combination switch assembly (clearance sonar main switch).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

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

    OK

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


    1. B002IIQC01
      *a

      Front view of wire harness connector

      (to Combination Switch Assembly [Clearance Sonar Main Switch])

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      I33-4 (IG) - Body ground Power switch on (IG) 11 to 14 V
      I33-4 (IG) - Body ground Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the I20 clearance warning ECU assembly connector.

    2. Disconnect the I33 combination switch assembly (clearance sonar main switch) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I20-38 (CLSW) -I33-14 (ECU) Always Below 1 Ω
      I20-38 (CLSW) or I33-14 (ECU) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CLEARANCE WARNING ECU ASSEMBLY for LHD REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here
    REPLACE CLEARANCE WARNING ECU ASSEMBLY for RHD REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR