DYNAMIC RADAR CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

The cruise control switch is used to turn the 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 it 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 driving support ECU then reads the voltage value that has been changed by the switch operation to MODE, SET, -, RES, +, or 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

A005BWPE18

PROCEDURE


  1. 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.

      A005CRDE01
      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 Switch Condition Specified Condition

      1 - 2

      1 - 3

      		 Cruise control switch ON-OFF button not pressed 1 MΩ or higher
      1 - 3 Cruise control switch ON-OFF button pressed 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 CRUISE CONTROL SWITCH WIRE (SPIRAL CABLE - CRUISE CONTROL SWITCH)


    1. A005BDQE02
      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 - z10-4 Always Below 2.5 Ω
      Cruise control switch side connector terminal 2 - z10-1 Always Below 2.5 Ω
      Cruise control switch side connector terminal 3 - z10-3 Always Below 2.5 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      Cruise control switch side connector terminal 1 - z10-4 Always 1 MΩ or higher
      Cruise control switch side connector terminal 2 - z10-1 Always 1 MΩ or higher
      Cruise control switch side connector terminal 3 - z10-3 Always 1 MΩ or higher

    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 CRUISE CONTROL SWITCH WIRE (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. Remove the spiral with sensor cable sub-assembly Click here.

      A005EKNE02

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      z10-1 - L52-7 (R/N) Always Below 1 Ω
      z10-3 - L52-1 (CCS) Always Below 1 Ω
      z10-4 - L52-2 (ECC) Always Below 1 Ω
      Text in Illustration
      *a

      Component without harness connected

      (Spiral with Sensor Cable Sub-assembly)

      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 assembly 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
      L60-23 (CCS) - L52-1 (CCS) Always Below 1 Ω
      L60-10 (CCHG) - L52-7 (R/N) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      L60-23 (CCS) or L52-1 (CCS) - Body ground Always 10 kΩ or higher
      L60-10 (CCHG) or L52-7 (R/N) - Body ground Always 10 kΩ or higher

    4. Reconnect the driving support ECU assembly 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. A005CX0E02
      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
      L52-2 (ECC) - Body ground Always Below 1 Ω

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


    OK

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

    NG

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