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

A0042XRE10

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE ON GTS


    1. A0043TEE02
      Text in Illustration
      *a ON-OFF
      *b -/SET
      *c +/RES

      Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Select the following menu items: Powertrain / Radar Cruise / Data List.

    5. Check the Data List to confirm proper functioning of the cruise control switch.

      Radar Cruise
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Cruise Control Main Switch Cruise control switch signal / ON or OFF

      ON: Cruise control switch (ON-OFF button) pushed

      OFF: Cruise control switch (ON-OFF button) released

      		 -
      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

      		 -
      OK
      When the cruise control switch is operated, the display changes as shown above.

    NG

    INSPECT CRUISE CONTROL SWITCH Click here

    OK

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

  2. 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.

      A0042SWE27
      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 Condition Specified Condition

      1 - 2

      1 - 3

      		 Cruise control switch (ON-OFF button) released 1 MΩ or higher
      1 - 3 Cruise control switch (ON-OFF button) pushed 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

    NG

    REPLACE CRUISE CONTROL SWITCH Click here

    OK

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


    1. A0043IME09
      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 spiral with sensor cable sub-assembly connector.

    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
      z10-4 - Cruise control switch side connector terminal 1 Always Below 1 Ω
      z10-1 - Cruise control switch side connector terminal 2 Always Below 1 Ω
      z10-3 - Cruise control switch side connector terminal 3 Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      z10-4 - Body ground Always 10 kΩ or higher
      z10-1 - Body ground Always 10 kΩ or higher
      z10-3 - Body ground Always 10 kΩ or higher

    NG

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

    OK

  4. 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. A003ZXGE12
      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
      z10-1 - L43-7 (R/N) Center Below 3 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z10-3 - L43-1 (CCS) Center Below 3 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z10-4 - L43-2 (ECC) Center Below 3 Ω
      2.5 rotations to the left
      2.5 rotations to the right

    3. After setting the spiral cable with sensor assembly to the center position, rotate the spiral cable with sensor assembly 2.5 times clockwise. Then while rotating the spiral cable with sensor assembly 5 times counterclockwise, measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      z10-1 - L43-7 (R/N) Always Below 3 Ω
      z10-3 - L43-1 (CCS) Always Below 3 Ω
      z10-4 - L43-2 (ECC) Always Below 3 Ω

      Tech Tips

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

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


    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the driving support ECU 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
      L43-1 (CCS) - L54-23 (CCS) Always Below 1 Ω
      L43-7 (R/N) - L54-10 (CCHG) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      L43-1 (CCS) or L54-23 (CCS) - Body ground Always 10 kΩ or higher
      L43-7 (R/N) or L54-10 (CCHG) - Body ground Always 10 kΩ or higher

    NG

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

    OK

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


    1. A0041OYE36
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Spiral with Sensor Cable Sub-assembly)

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      L43-2 (ECC) - Body ground Always Below 1 Ω

    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