DYNAMIC RADAR CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

The cruise control main 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 main 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 when released. The internal contact points of the cruise control main 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

B00408GE15

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. B003Z8AC03
      *a ON-OFF
      *b CANCEL
      *c -SET
      *d +RES
      *e MODE

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


      Powertrain > Radar Cruise > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Main SW M-CPU Cruise control main switch signal (Main CPU) ON or OFF

      ON: Cruise control main switch on

      OFF: Cruise control main 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

      		 -

      Powertrain > Radar Cruise > Data List
      Tester Display
      Main SW M-CPU
      Cancel Switch
      SET/COAST Switch
      RES/ACC Switch
      OK
      When the cruise control main switch is operated, the display changes as shown in the table.
      Result
      Proceed to
      OK
      NG

    6. Turn the engine switch off.


    OK

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

    NG

  2. INSPECT CRUISE CONTROL MAIN SWITCH


    1. Remove the cruise control main switch.

      Click here

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

      B003ZXQC01
      *1 Cruise Control Main Switch (ON-OFF button) - -
      *a

      Component without harness connected

      (cruise control main switch)

      		 *b ON-OFF
      *c +/RES *d -/SET
      *e MODE *f CANCEL
      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (ECC) - 3 (R/N) Cruise control main switch (ON-OFF button) not pressed 1 MΩ or higher
      MODE Below 1.5 Ω
      1 (ECC) - 4 (CCS) Cruise control main switch (ON-OFF button) not pressed 1 MΩ or higher
      Cruise control main switch (ON-OFF button) pressed Below 1.5 Ω
      +/RES 235 to 245 Ω
      -/SET 617 to 643 Ω
      CANCEL 1509 to 1571 Ω

    3. Reinstall the cruise control main switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CRUISE CONTROL MAIN SWITCH Click here

    OK

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


    1. B00401OC05
      *1 Cruise Control Switch Wire
      *a

      Front view of wire harness connector

      (to Spiral Cable Sub-assembly)
      *b

      Front view of wire harness connector

      (to Cruise Control Main Switch)

      Remove the cruise control switch wire.

      Click here

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      z8-4 - Cruise control main switch side connector terminal 1 Always Below 1 Ω
      z8-1 - Cruise control main switch side connector terminal 3 Always Below 1 Ω
      z8-3 - Cruise control main switch side connector terminal 4 Always Below 1 Ω

    3. Reinstall the cruise control switch wire.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE CRUISE CONTROL SWITCH WIRE Click here

    OK

  4. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. Inspect the spiral cable sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the A43 ECM connector.

    2. Disconnect the F61 spiral cable 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
      A43-47 (CCS) - F61-1 (CCS) Always 3 Ω or less
      A43-48 (CCHG) - F61-8 (R/N) Always 3 Ω or less
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A43-47 (CCS) or F61-1 (CCS) - Body ground Always 1 MΩ or higher
      A43-48 (CCHG) or F61-8 (R/N) - Body ground Always 1 MΩ or higher

    4. Reconnect the A43 ECM connector.

    5. Reconnect the F61 spiral cable sub-assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM)

    OK

  6. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND)


    1. Disconnect the F61 spiral cable 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
      F61-2 (ECC) - Body ground Always Below 1 Ω

    3. Reconnect the F61 spiral cable sub-assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND)