Lexus IS250 · Service Manual BODY ELECTRICAL

DATA LIST / ACTIVE TEST

System information


READ DATA LIST

HINT:
Using the intelligent tester DATA LIST allows switch, 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.

    Combination switch (Combination Switch ECU): 
    Item
    		 Measurement Item / Display (Range)
    		 Normal Condition
    		 Diagnostic Note
    Rear Fog Light Switch
    		 Rear fog light switch signal / ON or OFF
    		 ON: Rear fog light switch is in ON position
    OFF: Rear fog light switch is not in ON position
    		 -
    Front Fog Light Switch
    		 Front fog light switch signal / ON or OFF
    		 ON: Front fog light switch is in ON position
    OFF: Front fog light switch is not in ON position
    		 -
    Dimmer Hi Switch
    		 High beam switch signal / ON or OFF
    		 ON: Headlight dimmer switch is in HI position
    OFF: Headlight dimmer switch is not in HI position
    		 -
    Light Auto Switch
    		 Auto Light switch signal / ON or OFF
    		 ON: Light control switch is in AUTO position
    OFF: Light control switch is not in AUTO position
    		 -
    Head Light Switch
    		 Headlight control switch signal / ON or OFF
    		 ON: Light control switch is in HEAD position
    OFF: Light control switch is not in HEAD position
    		 -
    Tail Light Switch
    		 Taillight switch signal / ON or OFF
    		 ON: Light control switch is in TAIL or HEAD position
    OFF: Light control switch is not in OFF position
    		 -
    Turn Left Switch
    		 Turn signal switch LH signal / ON or OFF
    		 ON: Light control switch is in LH position
    OFF: Light control switch is not in LH position
    		 -
    Turn Right Switch
    		 Turn signal switch RH signal / ON or OFF
    		 ON: Light control switch is in RH position
    OFF: Light control switch is not in RH position
    		 -
    Passing Light Switch
    		 Passing light switch signal / ON or OFF
    		 ON: Headlight dimmer switch is in FLASH position
    OFF: Headlight dimmer switch is not in FLASH position.
    		 -
    Ignition Switch Signal
    		 Engine switch signal / ON or OFF
    		 ON: Engine switch on (IG)
    OFF: Engine switch off
    		 -
    Main Body (MAIN BODY ECU RH): 
    Item
    		 Measurement Item / Display (Range)
    		 Normal Condition
    		 Diagnostic Note
    ACC SW
    		 Engine switch on (ACC) / on (IG) or off
    		 ON: Engine switch on (ACC)
    OFF: Engine switch off
    		 -
    IG SW
    		 Engine switch / on (IG) or OFF
    		 ON: Engine switch on (IG)
    OFF: Engine switch off
    		 -
    Head Light SW (Head)
    		 Headlight control switch / ON or OFF
    		 ON: Light control switch in HEAD position
    OFF: Light control switch is not in HEAD position
    		 -
    D Door Courtesy SW
    		 Driver side courtesy SW / ON or OFF
    		 ON: Driver side door is open
    OFF: Driver side door is closed
    		 -
    P Door Courtesy SW
    		 Passenger side courtesy SW / ON or OFF
    		 ON: Passenger side door is open
    OFF: Passenger side door is closed
    		 -
    Rear Door Courtesy SW
    		 Rear (LH or RH) courtesy SW / ON or OFF
    		 ON: Rear door (LH or RH) is open
    OFF: Rear door (LH or RH) is closed
    		 -
    Illumination Rate Info
    		 Illumination information / 0 to 99.99 ms
    		 8 to 22 ms
    		 -
    Illumination SW
    		 Illumination SW / ON or OFF
    		 ON: Illumination switch on
    OFF: Illumination switch off
    		 -
    Body No. 3 (MAIN BODY ECU LH): 
    Item
    		 Measurement Item / Display (Range)
    		 Normal Condition
    		 Diagnostic Note
    IG SW
    		 Engine switch / ON or OFF
    		 ON: Engine switch on (IG)
    OFF: Engine switch off
    		 -
    AFS ECU: 
    Item
    		 Measurement Item / Display (Range)
    		 Normal Condition
    		 Diagnostic Note
    AFS OFF SW
    		 ASF OFF switch / ON or OFF
    		 ON: AFS ON
    OFF: AFS OFF
    		 -
    Headlamp Sig
    		 Headlight signal / ON or OFF
    		 ON: Light control switch is in HEAD position
    OFF: Light control switch is not in HEAD
    		 -
    Head Comb SW
    		 Light control switch signal / ON or OFF
    		 ON: Light control switch is in HEAD position
    OFF: Light control switch is not in HEAD
    		 -
    Head Auto Sig
    		 Headlight signal / ON or OFF
    		 ON: Automatic light control system is operated
    OFF: Automatic light control system is stopped
    		 -
    +B
    		 Battery voltage value / 0 to 20
    		 Condition sign can be displayed
    		 -
    Height Sens Val
    		 Height sensor power supply value / 0 to 5
    		 Condition sign can be displayed
    		 -
    Fr Height Sens
    		 Front height sensor signal value / 0 to 5
    		 Approx. 2.5 V
    		 -
    Rr Height Sens
    		 Rear height sensor signal value / 0 to 5
    		 Approx. 2.5 V
    		 -
    Steer Sens Sig
    		 Steering sensor signal / -384° to 382.5°
    		 Approx. 0 °
    (When steering wheel is straight)
    		 -
    Str Sens Pos
    		 Steering sensor center position / -307.2° to 307.5°
    		 Condition sign can be displayed
    		 -
    L Swivl Mtr Pos
    		 Left swivel motor position sensor value / 0 to 5
    		 Condition sign can be displayed
    		 -
    R Swivl Mtr Pos
    		 Right swivel motor position sensor value / 0 to 5
    		 Condition sign can be displayed
    		 -


PERFORM ACTIVE TEST

HINT:
Performing the intelligent tester ACTIVE TEST allows relay, VSV, actuator, 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 LDC3.

  2. Turn the engine switch on (IG).

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

    Main Body (MAIN BODY ECU RH): 
    Item
    		 Test Details
    		 Diagnostic Note
    Headlight Relay
    		 Headlight relay ON / OFF
    		 -
    Dimmer Signal
    		 Dimmer signal ON / OFF
    		 -
    Step Light Operation
    		 Footwell light ON / OFF
    		 -
    Tail Light
    		 Tail light ON / OFF
    		 -
    Interior Panel Relay
    		 Instrument panel light ON / OFF
    		 Models with DRL
    Hazard
    		 Hazard light ON / OFF
    		 -
    Body No. 3 (MAIN BODY ECU LH): 
    Item
    		 Test Details
    		 Diagnostic Note
    Turn Lamp RH
    		 Turn signal light operation ON / OFF
    		 -
    Turn Lamp LH
    		 Turn signal light operation ON / OFF
    		 -
    Interior Light Operation
    		 Interior lights ON / OFF
    		 -
    Interior Light (Dim) Operation
    		 Seat illumination ON / OFF
    		 -
    Exterior Foot Light Operation
    		 Door mirror foot lights ON / OFF
    		 -
    Shift Light Operation
    		 Shift light operation ON / OFF
    		 -
    Rear Fog Light
    		 Rear fog light operation ON / OFF
    		 -
    Body No. 5 (Front Controller): 
    Item
    		 Test Details
    		 Diagnostic Note
    Light Head (High)
    		 Headlight (High) ON / OFF
    		 -
    Front Fog Light Relay
    		 Front fog light relay ON / OFF
    		 -
    Light Head HI DRL Operation
    		 Light head hi DRL operation ON / OFF
    		-
    Clearance Light Operation
    		 Clearance light ON / OFF
    		 -
    AFS ECU: 
    Item
    		 Test Details
    		 Diagnostic Note
    Drive The Leveling Motor
    		 Drive the leveling motor UP / OFF
    		 -
    Drive The Leveling Motor
    		 Drive the leveling motor DOWN / OFF
    		 -
    Drive Swivel Motor RH
    		 Drive swivel motor RH RIGHT / OFF
    		 -
    Drive Swivel Motor LH
    		 Drive swivel motor LH LEFT / OFF
    		 -
    AFS OFF Indicator
    		 AFS OFF indicator ON / OFF
    		 -

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