Dynamic Radar Cruise Control System Data List / Active Test

Cruise Control System. Lexus Is250, Is220D. Gse20 Ale20
Cruise Control. Lexus Is250, Is220D. Gse20 Ale20

  1. READ DATA LIST

  1. ACTIVE TEST

Dynamic Radar Cruise Control System -- Data List / Active Test



READ DATA LIST
HINT:
Using the intelligent tester's DATA LIST allows switch, sensor, actuator, and other item values to be read without removing any parts. Reading the DATA LIST early in troubleshooting is one way to save time.

  1. Connect the intelligent tester to the DLC3.

  2. Turn the engine switch on (IG).

  3. Read the DATA LIST according to the display on the tester.

    ECM (Cruise control):
    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
    		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: Vehicle-to-vehicle distance mode
    		-
    Distance Time
    		Vehicle distance time setting condition / SHRT, MID, LONG, NO
    		Vehicle-to-vehicle distance selected by steering pad switch (distance control switch)
    		-
    O/D Cut Rqst
    		O/D cut request / NOT REQ or REQUEST
    		NOT REQ: Idling
    		-
    3rd Shift Down
    		Shift down request to 3rd gear / NOT REQ or REQUEST
    		NOT REQ: Idling
    		-
    4th Shift Down
    		Shift down request to 4th gear / NOT REQ or REQUEST
    		NOT REQ: Idling
    		-
    Alarm Rqst
    		Alarm request signal / NOT REQ or REQUEST
    		REQUEST: When beeping
    NOT REQ: When not beeping
    		-
    Throttle Close
    		All throttle close request / NOT REQ or REQUEST
    		ON: REQUEST
    OFF: NOT REQUEST
    		-
    Brake Ctrl Rqst
    		Brake control request / NOT REQ or REQUEST
    		ON: REQUEST
    OFF: NOT REQUEST
    		-
    Targ Decl Slope
    		Cruise target deceleration slope / 0.03, 0.06, 0.11, 0.15
    		0.03, 0.06, 0.11, 0.15
    		-
    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.: 36 km/h (22.5 mph), max.: 200 km/h (125 mph)
    		Memorized speed: Cruise control activated
    		-
    Rqst Torque
    		Cruise request torque / min.: -1,024 N*m (-10,442 kgf*cm, -755 ft.*lbf), max.: 1,016 N*m (10,360 kgf*cm, 749 ft.*lbf)
    		-
    		-
    Cruise Control
    		Cruise control system active condition / ON or OFF
    		ON: Cruise control activated
    OFF: Cruise control deactivated
    		-
    Main SW (Main)
    		Main switch signal (Main CPU) / ON or OFF
    		ON: Main switch on (Pushed on)
    OFF: Main switch off (Pushed off)
    		1
    CCS Indicator M
    		Cruise indicator signal (Main CPU) / ON or OFF
    		ON: "CRUISE" on
    OFF: "CRUISE" off
    		3
    Cancel SW
    		CANCEL switch signal / ON or OFF
    		ON: CANCEL switch on
    OFF: CANCEL switch off
    		-
    SET/COAST SW
    		 SET/COAST switch signal / ON or OFF
    		ON: - (COAST)/SET switch on
    OFF: - (COAST)/SET switch off
    		-
    RES/ACC SW
    		RES/ACC switch signal / ON or OFF
    		ON: + (ACCEL)/RES (RESUME) switch on
    OFF: + (ACCEL)/RES (RESUME) switch off
    		-
    Stp Light SW M
    		Stop light switch signal (Main CPU) / ON or OFF
    		ON: Brake pedal depressed
    OFF: Brake pedal released
    		-
    Shift D Pos
    		PNP switch signal (D position) / ON or OFF
    		ON: Shift lever in D
    OFF: Shift lever not in D
    		-
    VSC Fail Safe
    		VSC fail-safe flag / ON or OFF
    		-
    		-

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

ACTIVE TEST
HINT:
Performing the intelligent tester's ACTIVE TEST allows relays, VSVs, actuators, and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. The DATA LIST can be displayed during the ACTIVE TEST.

  1. Connect the intelligent tester to the DLC3.

  2. Turn the engine switch on (IG).

  3. Perform the ACTIVE TEST according to the display on the tester.

    HINT:
    The engine switch must be turned on (IG) to proceed to the ACTIVE TEST using the intelligent tester.

    Combination meter (Meter ECU):
    Item
    		Test Details
    		Diagnostic Note
    CRUISE INDIC
    		Turns CRUISE main indicator light ON / OFF
    		-