Lexus IS250 · Service Manual BODY ELECTRICAL

DATA LIST / ACTIVE TEST

System information


READ DATA LIST
C123647E01

HINT:
Using the intelligent tester 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 nonintrusive inspection can be very useful as 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.

  1. Connect the intelligent tester to the DLC3.

  2. Turn the engine switch on (IG).

  3. Read the DATA LIST.

    Body No. 3 (Main Body ECU LH): 
    Item
    		 Measurement Item / Display (Range)
    		 Normal Condition
    		 Diagnostic Note
    Front Wiper Switch
    		 Front wiper switch / ON or OFF
    		 ON: Engine switch on (IG) (Power source of wiper system ON)
    OFF: Engine switch off (Power source of wiper system OFF)
    		 -
    Speed Mode
    		 Speed mode / NOT AVL or AVAIL
    		 Customized value can be displayed
    		 -
    Auto Wiper
    		 Auto wiper / NOT AVL or AVAIL
    		 Customized value can be displayed
    		 -
    Rewipe Control
    		 Rewipe control / OFF or 3S or SPD
    		 Customized value can be displayed
    		 -
    IG SW
    		 IG switch / ON or OFF
    		 ON: Engine switch on (IG)
    OFF: Engine switch off
    		 -
    Body No. 5 (Front Controller): 
    Item
    		 Measurement Item / Display (Range)
    		 Normal Condition
    		 Diagnostic Note
    Washer Level Switch
    		 Washer fluid level switch / ON or OFF
    		 ON: Washer fluid is empty
    OFF: Washer fluid is full
    		 -
    Combination Switch: 
    Item
    		 Measurement Item / Display (Range)
    		 Normal Condition
    		 Diagnostic Note
    F Washer SW
    		 Front washer switch / ON or OFF
    		 ON: Front washer switch ON
    OFF: Front washer switch OFF
    		 -
    F Wiper Mist SW
    		 Front wiper MIST switch / ON or OFF
    		 ON: Front wiper switch in MIST position
    OFF: Wiper switch not in MIST position
    		 -
    F Wiper Hi SW
    		 Front wiper HI switch / ON or OFF
    		 ON: Front wiper switch in HI position
    OFF: Wiper switch not in HI position
    		 -
    F Wiper Lo SW
    		 Front wiper LO switch / ON or OFF
    		 ON: Front wiper switch in LO position
    OFF: Wiper switch not in LO position
    		 -
    F Wiper Int SW
    		 Front wiper INT switch / ON or OFF
    		 ON: Front wiper switch in INT position
    OFF: Wiper switch not in INT position
    		 -
    IG SW Sig
    		 Engine switch signal / ON or OFF
    		 ON: Engine switch on (IG)
    OFF: Engine switch off
    		 -
    F Wiper Vol Pos
    		 Front wiper volume (sensitivity) / 0 to 90 degrees
    		 0 degrees: FR wiper volume "+" position
    27 degrees: Switch is turned one notch towards the "-" side from the FR wiper volume "+" position
    63 degrees: Switch is turned one notch towards the "+" side from the FR wiper volume "-" position
    90 degrees: FR wiper volume "-" position
    		 If value is NG, replace the windshield wiper switch assembly (Click here).
    Rain Sensor: 
    Item
    		 Condition
    		 Specified Condition
    		 Diagnostic Note
    Sen Cond Inf
    		 Engine switch on (IG) and front wiper switch except AUTO
    		 OK
    		 This item diagnoses the conditions inside the rain sensor.
    If NG is displayed, replace the rain sensor because it has an internal problem.
    Sens React Conde
    		 Engine switch on (IG) and front wiper switch except AUTO
    		 OK
    		 This item diagnoses the rain sensor detection conditions.
    If NG is displayed, clean the outside of the windshield where the rain sensor is installed.
    Also Confirm the following:
    - The sensor is correctly installed.
    - No air bubbles are trapped between the windshield and the sensor tape.
    - The sensor tape is properly placed between the windshield and sensor.
    - The sensing portion of the sensor (contact surface with the windshield) is clean.
    If no defects are found, replace the rain sensor because it may have an internal problem.
    Sen Hi Temp Inf
    		 Engine switch on (IG) and front wiper switch except AUTO
    		 OK
    		 This item diagnoses the detection conditions of the temperature sensor in the rain sensor.
    If NG is displayed, check if the temperature around the rain sensor is more than 90°C (194°F). If the temperature is 90°C (194°F) or less, replace the rain sensor because it may have an internal problem.
    Wip SW Lo Sig
    		 Engine switch on (IG) and front wiper switch except LO → LO
    		 OFF / ON
    		 -
    Wip SW Hi Sig
    		 Engine switch on (IG) and front wiper switch except HI → HI
    		 OFF / ON
    		 -
    Wip SW Auto Sig
    		 Engine switch on (IG) and front wiper switch except AUTO → AUTO
    		 OFF / ON
    		 -
    Wash SW Sig
    		 Engine switch on (IG) and front washer switch OFF → ON
    		 OFF / ON
    		 -
    Wip SW Mist Sig
    		 Engine switch on (IG) and front wiper switch except MIST → MIST
    		 OFF / ON
    		 -
    Key SW Sig
    		 Engine switch on (IG) → Without key
    		 OFF / ON
    		 -


PERFORM ACTIVE TEST

HINT:
Performing the 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.

    Body No. 3 (Main Body ECU LH): 
    Item
    		 Test Details
    		 Diagnostic Note
    Wiper Motor HI
    		 Wiper motor HI operation ON / OFF
    		 -
    Wiper Motor LO
    		 Wiper motor LO operation ON / OFF
    		 -
    Body No. 5 (Front Controller): 
    Item
    		 Test Details
    		 Diagnostic Note
    Washer Motor Operation
    		 Washer motor operation ON / OFF
    		 -

← FAIL-SAFE CHARTFront Wiper Motor Circuit →