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Home >> Toyota >> 2005 >> Highlander Base, 2.4 D, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control System - Diagnostics >> Cruise Control Switch Circuit >> Inspection Procedure

Inspection Procedure

  1. READ VALUE OF HAND HELD TESTER 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch to the ON position.
    3. According to the display on the tester, read the "DATA LIST".
    Fig 1: Identifying Combination Switch
    G02596724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    ECM: 

    HAND HELD TESTER READ VALUE CHART

    Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
    MAIN SW (MAIN) Main SW signal (Main CPU) / ON or OFF ON: Main SW ON (Pushed on) OFF Main SW OFF (Pushed off) -
    MAIN SW (SUB) Main SW signal (Sub CPU) / ON or OFF ON: Main SW ON (Pushed on) OFF Main SW OFF (Pushed off) -
    CANCEL SW CANCEL SW signal / ON or OFF ON: CANCEL SW ON OFF: CANCEL SW OFF -
    SET/COAST SW -/SET SW signal / ON or OFF ON: -/SET SW ON OFF: -/SET SW OFF -
    RES/ACC SW +/RES SW signal / ON or OFF ON: +/RES SW ON OFF: +/RES OFF -
    1. OK: When cruise control main switch operation is performed, the standard values will be above. 
    RESULT

    OK A
    NG (All items are defective.) B
    NG (One to four items are defective.) C
    1. B: Go to step 2 
    2. C: REPLACE CRUISE CONTROL MAIN SWITCH (SEE  CRUISE CONTROL MAIN SWITCH  ) 
    3. A: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE  PROBLEM SYMPTOMS TABLE   ) 
  2. INSPECT CRUISE CONTROL MAIN SWITCH 
    1. Disconnect the cruise control main switch connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      RESISTANCE CHECK SPECIFIED CONDITION

      Switch condition Tester connection Resistance (Ω)
      Neutral 1 - 3 Ω (No continuity)
      +/RES 1 - 3 210 to 270
      -/SET 1 - 3 560 to 700
      CANCEL 1 - 3 1,380 to 1,700
      Main Switch OFF 1 - 3 10 kΩ or higher
      Main Switch ON 1 - 3 1 Ω or less
      Fig 2: Inspecting Cruise Control Main Switch
      G02596725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE CRUISE CONTROL MAIN SWITCH (SEE  CRUISE CONTROL MAIN SWITCH  ) 
    2. OK: Go To Next Step 
  3. CHECK HARNESS AND CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE SUB-ASSY) 
    1. Disconnect the spiral cable connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      RESISTANCE CHECK SPECIFIED CONDITION

      Tester connection Specification
      1 - A-5 Below 1 Ω
      3 - A-4 Below 1 Ω
      Fig 3: Checking Harness And Connector (Cruise Control Main Switch - Spiral Cable Sub-Assy)
      G02596726Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go To Next Step 
  4. INSPECT SPIRAL CABLE SUB-ASSY 
    1. Disconnect the spiral cable vehicle side connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      RESISTANCE CHECK SPECIFIED CONDITION

      Tester connection Specification
      A-4 - C16-4 Below 1 Ω
      A-5 - C16-5 Below 1 Ω
      Fig 4: Inspecting Spiral Cable Sub-Assy
      G02596727Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE SPIRAL CABLE SUB-ASSY (SEE  SPIRAL CABLE SUB-ASSY  ) 
    2. OK: Go To Next Step 
  5. CHECK HARNESS AND CONNECTOR 
    1. Disconnect the ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      RESISTANCE CHECK SPECIFIED CONDITION

      Tester connection Condition Specification
      Spiral cable (C16-5) - CCS (E6-24) Always Below 1 Ω
      CCS (E6-24) - Body ground Always 10 kΩ or higher
      Spiral cable (C16-4) - Body ground Always Below 1 Ω
      Fig 5: Identifying C16 Connector Terminals
      G02596728Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 6: Checking Harness And Connector
      G02596729Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: REPLACE ECM (SEE  ECM (3MZ-FE)  ) 
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