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 7 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP and CANCEL.

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 contains momentary type contacts for each function. The contacts close only while the cruise control main switch is being operated in the direction of the relative function arrow, and open when the cruise control main switch is released. The voltage at the terminal of the hybrid vehicle control ECU changes as each of the different contacts open or close. The hybrid vehicle control ECU reads this voltage and controls the SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL functions accordingly.


WIRING DIAGRAM

B004OVUE29

CAUTION / NOTICE / HINT

Note


  • Before replacing the hybrid vehicle control ECU, refer to Service Bulletin.

  • The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.

    Click here

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Radar Cruise 1 / Data List.

    5. Read the Data List according to the display on the GTS.


      Powertrain > Cruise Control > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Cancel Switch CANCEL switch status ON or OFF

      ON: CANCEL switch on

      OFF: CANCEL switch off

      		 -
      -SET Switch -SET switch status ON or OFF

      ON: -SET switch on

      OFF: -SET switch off

      		 -
      +RES Switch +RES switch status ON or OFF

      ON: +RES switch on

      OFF: +RES switch off

      		 -
      Cruise Main Switch Operation Condition Cruise control main switch (ON/OFF button) status ON or OFF

      ON: Cruise control main switch (ON/OFF button) pushed

      OFF: Cruise control main switch (ON/OFF button) not pushed

      		 -

      Powertrain > Cruise Control > Data List
      Tester Display
      Cancel Switch
      -SET Switch
      +RES Switch
      Cruise Main Switch Operation Condition
      OK
      The Data List items shown in the table change according to the operation of the cruise control main switch.
      Result
      Proceed to
      OK
      NG

    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. Inspect 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


    1. B004QUNC63
      *a

      Front view of wire harness connector

      (to Spiral Cable with Sensor 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
      Tester Connection Condition Specified Condition
      z7-3 (CCS) - A-3 (CCS) Always Below 1 Ω
      z7-4 (ECC) - A-1 (ECC) Always Below 1 Ω
      z7-3 (CCS) or A-3 (CCS) - Body ground Always 10 kΩ or higher
      z7-4 (ECC) or A-1 (ECC) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CRUISE CONTROL SWITCH WIRE Click here

    OK

  4. INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY


    1. Remove the spiral cable with sensor sub-assembly.

      Click here

    2. Inspect the spiral cable with sensor sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - HYBRID VEHICLE CONTROL ECU AND BODY GROUND)


    1. Disconnect the F21 spiral cable with sensor sub-assembly connector.

    2. Disconnect the F3 hybrid vehicle control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F21-1 (CCS) - F3-14 (CCS) Always Below 1 Ω
      F21-2 (ECC) - Body ground Always Below 1 Ω
      F21-1 (CCS) or F3-14 (CCS) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR