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Cruise Control Switch Circuit: Wiring Diagram

Fig 1: Cruise Control Switch Circuit - Wiring Diagram
G04092018Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. READ VALUE OF INTELLIGENT TESTER 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch on, and turn the intelligent tester main switch on.
      Fig 2: Identifying Cruise Control Switch Positions
      G04092019Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the DATA LIST for proper functioning of the cruise control main switch.

      LASER CRUISE: 

      LASER CRUISE DATA LIST

      Item Measurement Item / Display (Range) Normal Condition Diagnostic Note
      MAIN SW (MAIN) Main switch signal (Main CPU) / ON or OFF ON: Main switch ON (Pushed on)
      OFF: Main switch OFF (Pushed off)      		 -
      CANCEL SW CANCEL switch signal / ON or OFF ON: CANCEL switch ON
      OFF: CANCEL switch OFF      		 -
      SET/COAST SW -/SET switch signal / ON or OFF ON: -/SET switch ON
      OFF: -/SET switch OFF      		 -
      RES/ACC SW +/RES switch signal / ON or OFF ON: +/RES switch ON
      OFF: +/RES switch OFF      		 -

    OK: When cruise control main switch operation is performed, the result will be same as above. 

    Result: 

    OUTPUT RESULT TABLE

    Result Proceed to
    OK A
    NG (all items are defective) B
    NG (one to four items are defective) C

    A : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    C : REPLACE CRUISE CONTROL MAIN SWITCH 

    B : Go to next step 

  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.
    Fig 3: Inspecting Cruise Control Main Switch
    G04092020Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard resistance 

    TESTER CONNECTION - RESISTANCE TABLE

    Tester Connection Switch Condition Specified Condition
    1 - 2, 1 - 3 Neutral 10 kΩ or higher
    1 - 3 +/RES 210 to 270 Ω
    1 - 3 -/SET 560 to 700 Ω
    1 - 3 CANCEL 1380 to 1700 Ω
    1 - 3 Main Switch OFF 10 kΩ or higher
    1 - 3 Main Switch OFF Below 1 Ω
    1 - 2 MODE Below 1 Ω

    NG : REPLACE CRUISE CONTROL MAIN SWITCH 

    OK : Go to next step 

  3. CHECK WIRE HARNESS AND CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE SUB-ASSEMBLY) 
    1. Turn the ignition switch OFF.
    2. Disconnect the cruise control main switch connector and spiral cable connector.
    3. Check for an open circuit in harness and connector.

      Resistance 

      TESTER CONNECTION - RESISTANCE TABLE

      Terminal No. Specified value
      A-1 - B-2 Below 1 Ω
      A-3 - B-3 Below 1 Ω
      A-4 - B-1 Below 1 Ω
    4. Connect the spiral cable connector.
    5. Check for an open circuit in harness and connector.

    Resistance 

    Fig 4: Checking Wire Harness And Connector (Cruise Control Main Switch - Spiral Cable Sub-Assembly)
    G04092021Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION - RESISTANCE TABLE

    Terminal No. Specified value
    B-2 - Body ground 10 kΩ or higher
    B-3 - Body ground 10 kΩ or higher

    NG : REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 

    OK : Go to next step 

  4. INSPECT SPIRAL CABLE 
    1. Disconnect the spiral cable connector.
    2. Measure the resistance according to the value(s) in the table below.

    Standard resistance 

    Fig 5: Inspecting Spiral Cable
    G04092022Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION - RESISTANCE TABLE

    Tester Condition Specified Condition
    A-1 - C13-7 Below 1 Ω
    A-3 - C13-1 Below 1 Ω
    A-4 - C13-2 Below 1 Ω

    NG : REPLACE SPIRAL CABLE 

    OK : Go to next step 

  5. CHECK WIRE HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM) 
    1. Check for an open or short circuit in harness and connector between the spiral cable sub-assembly and ECM (See HOW TO PROCEED WITH TROUBLESHOOTING ).

    NG : REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 

    OK : Go to next step 

  6. CHECK WIRE HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND) 
    1. Check for an open circuit in harness and connector between the spiral cable sub-assembly and body ground (See HOW TO PROCEED WITH TROUBLESHOOTING ).

    NG : REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 

    OK : REPLACE ECM 

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