DYNAMIC RADAR CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

The cruise control switch is used to turn the dynamic radar 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 ECM 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 2 cruise control modes: constant speed control mode and vehicle-to-vehicle distance control mode.


WIRING DIAGRAM

A01G93UE01

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING GTS (MAIN SW M-CPU, CANCEL SWITCH, SET/COAST SWITCH, RES/ACC SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. A01G7YWE19
      Text in Illustration
      *a ON-OFF
      *b CANCEL
      *c -SET
      *d +RES
      *e MODE

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

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

      ON: Cruise control switch on

      OFF: Cruise control switch off

      		 -
      Cancel Switch CANCEL switch signal / ON or OFF

      ON: CANCEL switch on

      OFF: CANCEL switch off

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

      ON: -/SET switch on

      OFF: -/SET switch off

      		 -
      RES/ACC Switch +/RES switch signal / ON or OFF

      ON: +/RES switch on

      OFF: +/RES switch off

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

    6. Turn the engine switch off.


    NG

    INSPECT CRUISE CONTROL SWITCH Click here

    OK

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

  2. INSPECT CRUISE CONTROL SWITCH


    1. Remove the cruise control switch Click here.

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

      A01G6M1E27
      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 Cruise control switch ON-OFF button not pressed 1 MΩ or higher
      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.


    NG

    REPLACE CRUISE CONTROL SWITCH Click here

    OK

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


    1. A01G76GE06
      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)

      Remove the cruise control switch wire.

    2. 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

    3. Reinstall the cruise control switch wire.


    NG

    REPAIR OR REPLACE CRUISE CONTROL SWITCH WIRE

    OK

  4. 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.

    Tech Tips



    1. A01G5G1E12
      Text in Illustration
      *a

      Component without harness connected

      (Spiral Cable with Sensor Sub-assembly)
      *b Steering Pad Switch Assembly Side
      *c Vehicle Side

      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

      Tech Tips

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

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


    NG

    REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - ECM)


    1. Disconnect the A22 ECM 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
      A22-47 (CCS) - H22-1 (CCS) Always 3 Ω or less
      A22-48 (CCHG) - H22-8 (R/N) Always 3 Ω or less
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A22-47 (CCS) or H22-1 (CCS) - Body ground Always 1 MΩ or higher
      A22-48 (CCHG) or H22-8 (R/N) - Body ground Always 1 MΩ or higher

    4. Reconnect the A22 ECM connector.

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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. 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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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