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Inspection Procedure

WARNING: This page is about a different car, the 2009 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Cruise Control / Data List.
    5. Check the Data List for proper functioning of the cruise control main switch.
    Fig 1: Identifying Cruise Control Switch
    G06009679Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Cruise Control (ECM) 

    CRUISE CONTROL REFERENCE

    Tester Display Measurement Item/Range Normal Condition Diagnostic Note
    Main SW M-CPU Main switch signal (Main CPU)/ ON or OFF ON: Cruise control main switch pushed
    OFF: Cruise control main switch not pushed    		 -
    Cancel SW CANCEL switch signal/ON or OFF ON: CANCEL switch on
    OFF: CANCEL switch off    		 -
    SET/COAST SW - (COAST)/SET switch signal/ON or OFF ON: - (COAST)/SET switch on
    OFF: - (COAST)/SET switch off    		 -
    RES/ACC SW + (ACCEL)/RES (RESUME) switch signal/ON or OFF ON: + (ACCEL)/RES (RESUME) switch on
    OFF: + (ACCEL)/RES (RESUME) switch off    		 -

    OK: 

    When the cruise control main switch is operated, the display changes as shown above. 

    Result 

    RESULT REFERENCE

    Result Proceed to
    OK A
    NG (All Items are defective) B
    NG (1 to 3 items are defective) C

    B : Go to step 2 

    C : REPLACE CRUISE CONTROL MAIN SWITCH  (See CRUISE CONTROL MAIN SWITCH )

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

  2. INSPECT CRUISE CONTROL MAIN SWITCH 
    1. Remove the cruise control main switch (See CRUISE CONTROL MAIN SWITCH ).
    2. Measure the resistance according to the value(s) in the table below.
    Fig 2: Identifying Cruise Control Main Switch Operation
    G05750574Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard Resistance 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Tester Connection Switch Condition Specified Condition
    3 (CCS) - 1 (ECC) Neutral 10 kΩ or higher
    3 (CCS) - 1 (ECC) + (ACCEL)/RES (RESUME) 216 to 264 Ω
    3 (CCS) - 1 (ECC) - (COAST)/SET 567 to 693 Ω
    3 (CCS) - 1 (ECC) CANCEL 1386 to 1694 Ω
    3 (CCS) - 1 (ECC) Main switch on Below 1.0 Ω

    NG : REPLACE CRUISE CONTROL MAIN SWITCH  (See CRUISE CONTROL MAIN SWITCH )

    OK : Go to next step 

  3. CHECK HARNESS AND CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE) 
    1. Disconnect the Y2 connector from the spiral cable.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified condition
      A-1 - Y2-4 Always Below 1 Ω
      A-3 - Y2-3 Always Below 1 Ω

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 3: Identifying Terminals Of Y2 Spiral Cable Connector
    G06009681Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : Go to next step 

  4. CHECK SPIRAL CABLE 
    NOTE: The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may cause airbag deployment. Be sure to read the page shown in the brackets.

    HINT:

    1. Remove the spiral cable (See SPIRAL CABLE ).
    2. Measure the resistance according to the value(s) in the table below.

    Standard Resistance 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    Y2-3 - E6-1 (CCS) The spiral cable position Is center Below 1 Ω
    The spiral cable position Is 2.5 rotations to the left
    The spiral cable position is 2.5 rotations to the right
    Y2-4 - E6-2 (ECC) The spiral cable position is center Below 1 Ω
    The spiral cable position is 2.5 rotations to the left
    The spiral cable position Is 2.5 rotations to the right
    Fig 4: Identifying Terminals Of Spiral Cable Connector
    G05641287Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The spiral cable makes a maximum of approximately 5 rotations.

    NG : REPLACE SPIRAL CABLE  (See SPIRAL CABLE )

    OK : Go to next step 

  5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECM, BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    E6-1 (CCS) - A50-40 (CCS) Always Below 1 Ω
    A50-40 (CCS) - Body ground Always 10 kΩ or higher
    E6-2 (ECC) - Body ground Always Below 1 Ω

    Result 

    RESULT REFERENCE

    Result Proceed to
    NG A
    OK (for 2ZR-FE) B
    OK (for 2AZ-FE) C

    B : REPLACE ECM (for 2ZR-FE)  (See ECM )

    C : REPLACE ECM (for 2AZ-FE)  (See ECM )

    Fig 5: Identifying Terminals Of A50 ECM Connector
    G06009683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    A : REPAIR OR REPLACE HARNESS OR CONNECTOR 

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