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Home >> Lexus >> 2008 >> IS F >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control >> Dynamic Radar Cruise Control System >> Data List / Active Test
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Data List / Active Test

  1. DATA LIST 

    HINT

    Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed Reading the Data List information early in troubleshooting is one way to save diagnostic time

    NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Radar Cruise / Data List.
    5. Read the Data List according to the display on the Techstream

      Radar Cruise (ECM) 

      DATA LIST

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Accel Request Accelerator request signal/min -2621 44 k/h/s, max 2621 36 k/h/s No vehicle in front -
      Vehicle Distance Millimeter wave radar sensor/min 0 m (0 ft), max 255 m (836 65 ft) Distance to vehicle in front -
      L/C Option Flag Dynamic radar cruise option flag/No or Yes Yes Dynamic radar cruise control system can be used
      No Dynamic radar cruise control system cannot be used      		 -
      Car Dist Time Setting Vehicle distance time setting condition/Short, Mid, Long, No Vehicle-to-vehicle distance selected by steering pad switch (distance control switch) -
      O/D Cut Request O/D cut request/Not Req or Request Not Req Idling -
      Shift Down Rqst to 3rd Shift down request to 3rd gear/Not Req or Request Not Req Idling -
      Shift Down Rqst to 4th Shift down request to 4th gear/Not Req or Request Not Req Idling -
      Shift Down Rqst to 5th Shift down request to 5th gear/Not Req or Request Not Req Idling -
      Shift Down Rqst to 6th Shift down request to 6th gear/Not Req or Request Not Req Idling -
      Alarm Request Alarm request signal/Not Req or Request Request When beeping
      Not Req When not beeping      		 -
      All Throttle Close Rqst All throttle close request/Not Req or Request ON Request
      OFF Not Req      		 -
      Brake Control Request Brake control request/Not Req or Request ON Request
      OFF Not Req      		 -
      Targ Decl Slope Cruise target deceleration slope/0 03, 0 06, 0 11, 0 15 0 03, 0 06, 0 11, 0 15 -
      CCS Vehicle Spd Vehicle speed sensor/min 0 km/h (0 mph), max 255 km/h (158 mph) Actual vehicle speed -
      CCS Mem Vehicle Spd Cruise control memorized speed/min 36 km/h (22 5 mph), max 200km/h (125mph) Memorized speed Cruise control activated -
      Throttle Opening Angle Throttle opening angle/mm 0°, max 125° Actual demanded throttle angle -
      Cruise Control Cruise control system active condition/ON or OFF ON Cruise control activated
      OFF Cruise control deactivated      		 -
      Main SW M-CPU Main switch signal (Main CPU)/ON or OFF ON Main switch on
      OFF Main switch off      		 3
      CCS Ready M-CPU Cruise control system standby condition (Main CPU)/ON or OFF Each time main switch is pushed, ON/OFF changes 1
      CCS Indicator M-CPU Cruise indicator signal (Main CPU)/ON or OFF ON "CRUISE" on
      OFF "CRUISE" off      		 2
      Cancel Switch CANCEL switch signal/ON or OFF ON CANCEL switch on
      OFF CANCEL switch off      		 -
      SET/COAST Switch SET/COAST switch signal/ON or OFF ON - (COAST)/SET switch on
      OFF - (COAST)/SET switch off      		 -
      RES/ACC Switch RES/ACC switch signal/ON or OFF ON + (ACCEL)/RES (RESUME) switch on
      OFF + (ACCEL)/RES (RESUME) switch off      		 -
      Stp Light SW M-CPU Stop light switch signal (Main CPU)/ON or OFF ON Brake pedal depressed
      OFF Brake pedal released      		 -
      Cruise Operation Status Cruise control condition/ON or OFF ON Cruise control operated
      OFF Cruise control operation stopped      		 -
      VSC Fail Safe Flag VSC fail-safe flag/Not Req or Request VSC communication fail safe in operation -
      # Codes Number of DTC recorded/0 to 255 Number of DTCs will be displayed -

      HINT

      • 3 is OK, but 1 is NG → ECM failure
      • 1 is OK, but 2 is NG → DTC output or ECM failure
      • 3 is OK, but CRUISE main indicator light does not illuminate → Cruise main indicator light, wire harness, or ECM failure
  2. ACTIVE TEST 

    HINT.

    Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG)
    3. Turn the Techstream on
    4. Enter the following menus- Body Electrical / Combination Meter / Active Test.
    5. Perform Active Test according to the display on the Techstream.

      HINT.

      The engine switch must be turned on (IG) to proceed with the Active Test using the Techstream.

      Combination Meter 

      ACTIVE TEST

      Tester Display Test Part Control Range Diagnostic Note
      Indicat Lamp Cruise Cruise main indicator light OFF or ON Confirm that the vehicle is stopped, engine idling
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