DYNAMIC RADAR CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

The cruise control switch operates 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 it in the direction of each arrow and turns off after being released. The internal contact points of the cruise control switch are turned on with the switch operation. The driving support ECU then reads the voltage value that has been changed by the switch operation to control MODE, SET, -, RES, +, and CANCEL. The dynamic radar cruise control system has two cruise control modes: constant speed control mode and vehicle-to-vehicle distance control mode.


WIRING DIAGRAM

A003X0AE11

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT CRUISE CONTROL SWITCH


    1. Remove the cruise control switch Click here.

      A003W3CE27
      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

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition

      1 - 2

      1 - 3

      		 Cruise control switch off 1 MΩ or higher
      1 - 3 Cruise control switch on Below 2.5 Ω
      1 - 2 MODE Below 2.5 Ω
      1 - 3 +/RES 235 to 245 Ω
      1 - 3 -/SET 617 to 643 Ω
      1 - 3 CANCEL 1509 to 1571 Ω

    3. Reinstall the cruise control switch Click here.


    NG

    REPLACE CRUISE CONTROL SWITCH Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - CRUISE CONTROL SWITCH)


    1. A003Z59E95
      Text in Illustration
      *a

      Front view of wire harness connector

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

      Front view of wire harness connector

      (to Cruise Control Switch)

      Disconnect the connector from the spiral with sensor cable sub-assembly.

    2. Disconnect the connector from the cruise control switch.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      Cruise control switch side connector terminal 1 - z5-4 Always Below 1 Ω
      Cruise control switch side connector terminal 2 - z5-1 Always Below 1 Ω
      Cruise control switch side connector terminal 3 - z5-3 Always Below 1 Ω

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

    5. Reconnect the connector to the cruise control switch.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - CRUISE CONTROL SWITCH)

    OK

  3. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

    Note

    The spiral with sensor cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable sub-assembly may cause airbag deployment. Be sure to read the page shown in the link/brackets.


    1. A003YV8E01
      Text in Illustration
      *a

      Component without harness connected

      (Spiral with Sensor Cable Sub-assembly)

      Remove the spiral with sensor cable sub-assembly 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
      z5-1 - H30-8 (R/N) The spiral with sensor cable sub-assembly is centered Below 1 Ω
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the right
      z5-3 - H30-1 (CCS) The spiral with sensor cable sub-assembly is centered Below 1 Ω
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the right
      z5-4 - H30-2 (ECC) The spiral with sensor cable sub-assembly is centered Below 1 Ω
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
      The spiral with sensor cable sub-assembly position is 2.5 rotations to the right

      Tech Tips

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

    3. Install the spiral with sensor cable sub-assembly Click here.


    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the driving support ECU connector.

    2. Disconnect the spiral with sensor 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
      H5-23 (CCS) - H30-1 (CCS) Always Below 1 Ω
      H5-10 (CCHG) - H30-8 (R/N) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      H5-23 (CCS) or H30-1 (CCS) - Body ground Always 10 kΩ or higher
      H5-10 (CCHG) or H30-8 (R/N) - Body ground Always 10 kΩ or higher

    4. Reconnect the driving support ECU connector.

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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - DRIVING SUPPORT ECU)

    OK

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


    1. A003XMME01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Spiral with Sensor Cable Sub-assembly)

      Disconnect the spiral with sensor 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
      H30-2 (ECC) - Body ground Always Below 1 Ω

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


    NG

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

    OK

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