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Pre-collision System Cancel Switch Circuit [03/2014 - ]: Procedure

  1. READ VALUE USING TECHSTREAM (PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY) 
    1. Use the Data List to check if the pre-collision system cancel switch assembly is functioning properly.
      PRE-COLLISION 2

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Pre-collision Brake OFF Switch Pre-collision system operational status/ON or OFF ON: Pre-collision system cancel switch on
      OFF: Pre-collision system cancel switch off      		 -

      OK

      On the Techstream screen, the item changes between ON and OFF according to the above table.

    NG → See step   2 

    OK → See step   5 

  2. INSPECT PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY 
    1. Remove the pre-collision system cancel switch assembly. Refer to REMOVAL [03/2014 - ] .
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      1 - 2 Pre-collision system cancel switch pressed Below 1 Ω
      Pre-collision system cancel switch not pressed 10 kΩ or higher
    3. Reinstall the pre-collision system cancel switch assembly. Refer to INSTALLATION [03/2014 - ] .

    NG → See step   6 

    OK: Go to next step 

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      F103-1 - C1-5 (PBSW) Always Below 1 Ω
      F103-1 - Body ground Always 10 kΩ or higher
    4. Reconnect the driving support ECU connector.
    5. Reconnect the pre-collision system cancel switch assembly connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY - DRIVING SUPPORT ECU) 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY - BODY GROUND) 
    1. Disconnect the 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
      F103-2 - Body ground Always Below 1 Ω
    3. Reconnect the pre-collision system cancel switch assembly connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY - BODY GROUND) 

    OK → See step   7 

  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [03/2014 - ] 
  6. REPLACE PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY. Refer to  REMOVAL [03/2014 - ] 
  7. REPLACE DRIVING SUPPORT ECU. Refer to  REMOVAL [03/2014 - ] 
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