FixVault
Home › Lexus › 2003 › SC 430 › Repair and Diagnosis › External Pages › Different car › Section 477 (Dynamic Laser Cruise Control System - Diagnosis) › Data List/Active Test

Data List/Active Test

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. DATA LIST 

    HINT:

    From the DATA LIST displayed on the hand-held tester, the value of components such as the switch, sensor, and actuator can be read without parts removal. Reading the DATA LIST as the first step of troubleshooting is one way to shorten labor time.

    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch to the ON position.
    3. According to the display on the tester, read the "DATA LIST".

    CC (ECM): 

    NORMAL CONDITION CHART

    Item Measurement Item / Display (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 Laser sensor/ min.:0 m (O ft), max.: 255 m (836.65 ft) Distance to the vehicle in front -
    L/C OPTION FLAG Laser cruise option flag / NO, YES YES: Vehicle to vehicle distance mode -
    DISTANCE TIME Car distance time setting condition /SHRT, MID, LONG, NO The vehicle selected by distance control switch -
    O/D CUT RQST O/D cut request / NOT REQ, REQUEST NOT REQ: Idling -
    3RD SHIFT DOWN Shift down request to 3rd gear / NOT REQ, REQUEST NOT REQ: Idling -
    4TH SHIFT DOWN Shift down request to 4th gear / NOT REQ, REQUEST NOT REQ: Idling -
    ALARM RQST Alarm request signal / NOT REQ, REQUEST REQUEST: When beeping
    NOT REQ: When not beeping    		 -
    THROTTLE CLOSE All throttle close request / NOT REQ, REQUEST ON: REQUEST
    OFF: NOT REQUEST    		 -
    BRAKE CTRL RQST Brake control request / NOT REQ, REQUEST ON: REQUEST
    OFF: NOT REQUEST    		 -
    TARG DECL SLOPE Cruise target deceleration slope / 0.03,0.06,0.11,0.16 0.03,0.06,0.11,0.16 -
    VEHICLE SPD Vehicle speed sensor/ min.: 0 km/h (0 mph), max.: 255 km/h (158 mph) Actual vehicle speed -
    MEMORY SPD Cruise control memorized speed / min.: 0 km/h (0 mph), max.: 255 km/h (158 mph) Memorized speed: Cruise control activated -
    THROTTLE Required throttle opening angle / min.: 0 deg, max.: 125 deg Required throttle opening angle: Cruise control activated -
    RQST TORQUE Cruise request torque/ min.: -1024 N.m, max.: 1016 N.m - -
    CRUISE CTRL Cruise control system active condition / ON or OFF ON: Cruise control activated
    OFF: Cruise control inactivated    		 -
    MAIN SW (MAIN) Main SW signal (Main CPU) / ON or OFF ON: Main SW ON (Pushed on)
    OFF: Main SW OFF (Pushed off)    		 *3
    MAIN SW (SUB) Main SW signal (Sub CPU) / ON or OFF ON: Main SW ON (Pushed on)
    OFF: Main SW OFF (Pushed off)    		 *3
    CCS READY M Cruise control system standby condition (Main CPU) / ON or OFF ON <==> OFF: Change ON/OFF each time Main SW is pushed. *1
    CCS READY S Cruise control system standby condition (Sub CPU) / ON or OFF ON <==> OFF: Change ON/OFF each time Main SW is pushed. *1
    CCS INDICATOR M Cruise indicator signal (Main CPU) /ON or OFF ON: "CCS READY" ON
    OFF: "CCS READY" OFF    		 *2
    CCS INDICATOR S Cruise indicator signal (Sub CPU) /ON or OFF ON: "CCS READY" ON
    OFF: "CCS READY" OFF    		 *2
    CANCEL SW CANCEL SW signal / ON or OFF ON: CANCEL SW ON
    OFF: CANCEL SW OFF    		 -
    SET/COAST SW SET/COAST SW signal / ON or OFF ON: SET/COAST SW ON
    OFF: SET/COAST SW OFF    		 -
    RES/ACC SW RES/ACC SW signal / ON or OFF ON: RES/ACC SW ON
    OFF: RES/ACC OFF    		 -
    STP LIGHT SW M Stop lamp SW signal (Main CPU) / ON or OFF ON: Brake pedal depressed
    OFF: Brake pedal released    		 -
    STP LIGHT SW S1 Stop lamp SW signal (Sub CPU) / ON or OFF ON: Brake pedal depressed
    OFF: Brake pedal released    		 -
    STP LIGHT SW S2 Stop lamp SW signal (Sub CPU) / ON or OFF ON: Brake pedal depressed
    OFF: Brake pedal released    		 -
    SHIFT D POS PNP SW signal (D position) / ON or OFF ON: Shift D position
    OFF: Except shift D position    		 -
    VSC FAIL SAFE VSC fail-safe flag/ ON or OFF - -

    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 come on --> Indicator, W/H, or ECM failure

    MULTI-INFORMATION DISPLAY CONTROL SWITCH (STEERING PAD SWITCH MODULATOR): 

    NORMAL CONDITION CHART

    Item Measurement Item / Display (Range) Normal Condition Diagnostic Note
    MULTI DSP2 SW Steering pad switch (DISP2) signal / ON or OFF ON <==> OFF: Change ON/OFF each time steering pad switch (DISP2) SW is pushed. -
  2. ACTIVE TEST 

    HINT:

    Performing the ACTIVE TEST using the hand-held tester allows components such as the relay, VSV, and actuator to operate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one way to shorten labor time.

    1. It is possible to display the DATA LIST during the ACTIVE TEST.
    2. Connect the hand-held tester to the DLC3.
    3. Turn the ignition switch to the ON position.
    4. According to the display on the tester, perform the "ACTIVE TEST".

      HINT:

      The ignition switch must be turned to the ON position to proceed to the ACTIVE TEST using the hand-held tester.

    COMBINATION METER ASSY: 

    ITEM DESCRIPTION CHART

    Item Vehicle Condition / Test Details Diagnostic Note
    CRUISE INDIC "CRUISE" indicator is ON / OFF -
    L-CRUISE DISP Graphic area is ON / OFF ((1))
    L-CRS CHECK IND "CHECK CRUISE SYSTEM" indicator is ON / OFF -
    L-CRS READY IND "RADAR READY" indicator is ON / OFF -
    (1) The entire graphic area in the combination meter will light up.
About FixVault