CRUISE CONTROL SYSTEM(for 8NR-FTS) Cruise Control Switch Circuit

DESCRIPTION

The cruise control main switch (ON/OFF button) is used to turn the 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 ECM changes as each of the different contacts open or close. The ECM reads this voltage and controls the SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL functions accordingly.

WIRING DIAGRAM

A005OGRE07

CAUTION / NOTICE / HINT

Note


  • 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

  • Before replacing the ECM refer to Service Bulletin.

PROCEDURE


  1. READ VALUE ON GTS (CANCEL SWITCH, -SET SWITCH, +RES SWITCH, CRUISE MAIN SWITCH OPERATION CONDITION)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Cruise Control / 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
    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
    OK
  3. CHECK CRUISE CONTROL SWITCH WIRE


    1. A005PBGC77
      *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.

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

      Standard Resistance (Check for Open)
      Tester Connection Specified Condition
      Cruise control main switch side connector terminal 3 - z4-3 Below 1 Ω
      Cruise control main switch side connector terminal 1 - z4-4 Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG
    OK
  4. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. Remove the spiral cable sub-assembly.

      Click here

    2. Inspect the spiral cable sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG
    OK
  5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM AND BODY GROUND)


    1. Disconnect the spiral cable sub-assembly connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F29-1 (CCS) - A38-55 (CCS) Always Below 1 Ω
      F29-2 (ECC) - A38-41 (ECCS) Always Below 1 Ω
      F29-1 (CCS) or A38-55 (CCS) - Body ground Always 10 kΩ or higher
      F29-2 (ECC) or A38-41 (ECCS) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  6. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)


    1. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C62-53 (E1) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK
    NG