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Home >> Lexus >> 2015 >> ES 350 >> Repair and Diagnosis (Single Page) >> Restraints >> Restraints Control Systems >> Pre-Collision - Diagnostic Codes & Circuit Tests >> Pre-Collision System >> Circuit Tests >> Pre-collision System Cancel Switch Circuit [08/2014 - ] >> Procedure

Pre-collision System Cancel Switch Circuit [08/2014 - ]: Procedure

  1. INSPECT PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY 
    1. Remove the pre-collision system cancel switch assembly. Refer to REMOVAL [08/2014 - ] .
      GTY406169Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 - 2 Pressed Below 1 Ω
      Not pressed 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Pre-collision system cancel switch assembly)

    NG → See step   4 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY - DRIVING SUPPORT ECU ASSEMBLY) 
    1. Disconnect the K1 pre-collision system cancel switch assembly connector.
    2. Disconnect the H75 driving support ECU assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K1-1 - H75-5 (PBSW) Always Below 1 Ω
      K1-1 or H75-5 (PBSW) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY - BODY GROUND) 
    1. Disconnect the K1 pre-collision system cancel switch assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K1-2 - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   5 

  4. REPLACE PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY. Refer to  COMPONENTS [08/2014 - ] 
  5. REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to  COMPONENTS [08/2014 - ]