DYNAMIC RADAR CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

The cruise control main switch operates 8 functions: SET, -(COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP, CANCEL, and MODE. The SET, TAP-DOWN, and - (COAST) functions, and the RES (RESUME), TAP-UP, and + (ACCEL) functions are operated with the same switch. The cruise control main switch is an automatic return type switch which turns on only while operating it in the direction of each arrow and turns off after releasing it. The internal contact point of the cruise control main switch is turned on with the switch operation. The ECM then reads the voltage value that has been changed by the switch operation to control MODE, SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL. The dynamic radar cruise control system has two cruise control modes: the constant speed control mode and vehicle-to-vehicle distance control mode.


WIRING DIAGRAM

A0161GJE01

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER

    A0161HME08

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Radar Cruise / Data List.

    5. Check the Data List for proper functioning of the cruise control main switch.

      Radar Cruise (ECM)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Main SW M-CPU Main switch signal (Main CPU)/ON or OFF

      ON: Main switch ON

      OFF: Main switch OFF

      		 -
      Cancel Switch CANCEL switch signal/ON or OFF

      ON: CANCEL switch ON

      OFF: CANCEL switch OFF

      		 -
      SET/COAST Switch SET/COAST switch signal/ON or OFF

      ON: - (COAST)/SET switch ON

      OFF: - (COAST)/SET switch OFF

      		 -
      RES/ACC Switch RES/ACC 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 Proceed to
      OK A
      NG (all items are defective) B
      NG (1 to 3 items are defective) C

    B

    INSPECT CRUISE CONTROL MAIN SWITCH Click here

    C

    REPLACE CRUISE CONTROL MAIN SWITCH Click here

    A

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. INSPECT CRUISE CONTROL MAIN SWITCH


    1. Remove the cruise control main switch Click here.

      A015Z1SE07

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition

      2 (R/N) - 1 (ECC)

      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 off 10 kΩ or higher
      3 (CCS) - 1 (ECC) Main Switch on Below 1 Ω
      2 (R/N) - 1 (ECC) Main Switch on and MODE Switch on Below 1 Ω

    NG

    REPLACE CRUISE CONTROL MAIN SWITCH Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - CRUISE CONTROL MAIN SWITCH)


    1. A016391E28

      Disconnect the m1 connector from the spiral cable.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-1 (ECC) - m1-4 (ECC) Always Below 1 Ω
      A-2 (R/N) - m1-1 (R/N) Always Below 1 Ω
      A-3 (CCS) - m1-3 (CCS) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT 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.

    Tech Tips



    1. A0161MTE16

      Remove the spiral cable Click here.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      m1-1 (R/N) - J24-7 (R/N) 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
      m1-3 (CCS) - J24-1 (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
      m1-4 (ECC) - J24-2 (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

      Tech Tips

      The spiral cable makes a maximum of approximately 5 rotations.


    NG

    REPLACE SPIRAL CABLE Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECM, BODY GROUND)


    1. Disconnect the A5 and A6 connectors from the ECM.

    2. A0163FCE01

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      J24-1 (CCS) - A6-15 (CCS) Always Below 1 Ω
      J24-7 (R/N) - A5-17 (CCHG) Always Below 1 Ω
      J24-1 (CCS) - Body ground Always 10 kΩ or higher
      J24-7 (R/N) - Body ground Always 10 kΩ or higher
      J24-2 (ECC) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM (for 2UR-GSE) Click here