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DYNAMIC RADAR CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

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DTC Code DTC Name
  Cruise Control Switch Circuit
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DESCRIPTION

The cruise control switch is used to turn the cruise control system on and off, as well as operate 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 switch is an automatic return type switch which turns on only while it is being operated in the direction of each arrow and turns off after being released. The internal contact points of the cruise control switch turn on with switch operation. The driving support ECU assembly then reads the voltage value that has been changed by the switch operation to control MODE, SET, -, RES, +, or CANCEL function. The dynamic radar cruise control system has two cruise control modes: constant speed control mode and vehicle-to-vehicle distance control mode.


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WIRING DIAGRAM

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PROCEDURE


  1. Click here

    INSPECT CRUISE CONTROL SWITCH


    1. Remove the cruise control switch (Click here).

    2. A0007QEE04

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

      Table 1. Text in Illustration
      *1 Cruise Control Switch (ON-OFF button) - -
      *a

      Component without harness connected

      (Cruise Control Switch)

      		 *b ON-OFF
      *c +/RES *d -/SET
      *e MODE *f CANCEL
      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 MODE Below 2.5 Ω
      1 - 3 Cruise control switch ON-OFF button not pressed 1 MΩ or higher
      Cruise control switch ON-OFF button pressed Below 2.5 Ω
      +/RES 235 to 245 Ω
      -/SET 617 to 643 Ω
      CANCEL 1509 to 1571 Ω

    3. Reinstall the cruise control switch (Click here).


  2. Click here

    CHECK CRUISE CONTROL SWITCH WIRE (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - CRUISE CONTROL SWITCH)


    1. Remove the cruise control switch wire.

    2. A0003R8E02

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      z6-4 - Cruise control switch side connector terminal 1 Always Below 1 Ω
      z6-1 - Cruise control switch side connector terminal 2 Always Below 1 Ω
      z6-3 - Cruise control switch side connector terminal 3 Always Below 1 Ω
      Table 2. Text in Illustration
      *a

      Front view of wire harness connector

      (to Spiral Cable with Sensor Sub-assembly)
      *b

      Front view of wire harness connector

      (to Cruise Control Switch)

    3. Reinstall the cruise control switch wire.


    • OKClick here
    • NG

      REPAIR OR REPLACE CRUISE CONTROL SWITCH WIRE

  3. Click here

    INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

    Note:

    The spiral cable with sensor sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable with sensor sub-assembly may prevent the airbag from deploying. Be sure to read the pages shown in the brackets.

    Tip:

    1. A0004R1E02

      Remove the spiral cable with sensor sub-assembly.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      z6-1 - H22-8 (R/N) Center 3 Ω or less
      2.5 rotations to the left
      2.5 rotations to the right
      z6-3 - H22-1 (CCS) Center 3 Ω or less
      2.5 rotations to the left
      2.5 rotations to the right
      z6-4 - H22-2 (ECC) Center 3 Ω or less
      2.5 rotations to the left
      2.5 rotations to the right

    3. After setting the spiral cable with sensor sub-assembly to the center position, rotate the spiral cable with sensor sub-assembly 2.5 times clockwise. Then while rotating the spiral cable with sensor sub-assembly 5 times counterclockwise, measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      z6-1 - H22-8 (R/N) Always 3 Ω or less
      z6-3 - H22-1 (CCS) Always 3 Ω or less
      z6-4 - H22-2 (ECC) Always 3 Ω or less
      Table 3. Text in Illustration
      *a

      Component without harness connected

      (Spiral Cable with Sensor Sub-assembly)
      *b Cruise Control Switch Side
      *c Vehicle Side
      Tip:

      The spiral cable with sensor sub-assembly makes a maximum of approximately 5 rotations.

    4. Reinstall the spiral cable with sensor sub-assembly.


  4. Click here

    CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY)


    1. Disconnect the H75 driving support ECU assembly connector.

    2. Disconnect the H22 spiral cable with sensor sub-assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      H75-23 (CCS) - H22-1 (CCS) Always 3 Ω or less
      H75-10 (CCHG) - H22-8 (R/N) Always 3 Ω or less
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      H75-23 (CCS) or H22-1 (CCS) - Body ground Always 1 MΩ or higher
      H75-10 (CCHG) or H22-8 (R/N) - Body ground Always 1 MΩ or higher

    4. Reconnect the H22 spiral cable with sensor sub-assembly connector.

    5. Reconnect the H75 driving support ECU assembly connector.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. Click here

    CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - BODY GROUND)


    1. Disconnect the H22 spiral cable with sensor sub-assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      H22-2 (ECC) - Body ground Always Below 1 Ω

    3. Reconnect the H22 spiral with sensor cable sub-assembly connector.


    • OK

      PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR