LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2004 >> Land Cruiser >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Systems - Diagnostics >> Pre-Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Body Control Systems - Diagnostics: Pre-Check

  1. USING HAND-HELD TESTER 
    1. Hook up the hand-held tester to the DLC3.
    2. Monitor the ECU data by following the prompts on the tester screen.

    HINT:

    Hand-held tester has a "Snapshot" function which records the monitored data.

    Please refer to the hand-held tester operator's manual for further details.

  2. DTC CLEAR 

    The DTCs and freezed frame data will be erased by either action.

    Operate the hand-held tester to erase the codes.

  3. DATA LIST 

    HINT:

    According to the DATA LIST displayed by the hand-held tester, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as a first step of troubleshooting is one of the method to shorten the labor time.

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

    Power source & ignition switch: 

    POWER SOURCE & IGNITION SWITCH NORMAL CONDITION

    Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
    ACC SW ACC SW signal ON: IG key is in ACC, ON or START position OFF: IG key is in OFF position -
    IG SW IG SW signal ON: IG key is in ON or START position OFF: IG key is in OFF or ACC position -

    Key unlock warning switch: 

    KEY UNLOCK WARNING SWITCH NORMAL CONDITION

    Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
    KEY UNLOCK WRN SW Key unlock warning SW signal ON: Key is IG key cylinder OFF: Key is not in IG key cylinder -

    Door courtesy switch: 

    DOOR COURTESY SWITCH NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    LUGG COURTSY SW Luggage compartment door's courtesy SW signal ON: Luggage door is open OFF: Luggage door is close -
    D DOR CTY SW Driver's door courtesy SW signal ON: Driver's door is open OFF: Driver's door is close -
    P DOR CYT SW Passenger's door courtesy SW signal ON: Passenger's door is open OFF: Passenger's door is close -
    Rr DOR CTY SW Rear door courtesy SW signal ON: Either right or left rear door is open OFF: Both the right and left doors and closed. -

    Headlight dimmer switch: 

    HEADLIGHT DIMMER SWITCH NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    DIMMER SW Dimmer SW signal ON: Dimmer SW is on (High Beam) or High flasher SW is on OFF: Dimmer SW is OFF (Low Beam) and High flasher SW is off -
    HIGH FLASHER SW High flasher SW signal ON: High flasher SW is on OFF: High flasher SW is off -

    Light control switch: 

    LIGHT CONTROL SWITCH NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    AUTO LIGHT SW Auto light SW signal ON: Light control SW is in Auto position OFF: Light control SW is in except Auto position -
    HEAD LIGHT SW Head light SW signal ON: Light control SW is in HEAD position OFF: Light control SW is in except HEAD position -
    TAIL LIGHT SW Taillight SW signal/ON ON: Light control SW is in TAIL or HEAD position OFF: Light control SW is in OFF or AUTO position -
    LIGHTING TIME Taillight SW signal/ON 7.5 s/15 s/30s -
    TAIL CANCEL SW Tail cancel switch ON: Tail cancel switch is ON position OFF: Tail cancel switch is OFF position -

    Door key lock and unlock switch: 

    DOOR KEYLOCK AND UNLOCK SWITCH NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    DOR KEY SW-LOCK Door key switch lock side ON: Door key switch is lock position OFF: Door key switch is unlock position -
    D DOR KEY SW-UL Driver door key switch unlock side ON: Driver door key switch is unlock position OFF: Driver door key switch is lock position -

    Door key lock and unlock switch: 

    DOOR KEY LOCK AND UNLOCK SWITCH NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    P LOCK POS SW Passenger lock position switch ON: Passenger lock position switch is lock position OFF: Passenger lock position switch is unlock position -
    D/L SW-LOCK Door lock switch lock side ON: Door lock switch is lock position OFF: Door lock switch is unlock position -
    D/L SW-UNLOCK Door lock switch unlock side ON: Door lock switch is unlock position OFF: Door lock switch is lock position -

    Parking brake switch: 

    PARKING BRAKE SWITCH NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    PARKING BRAKE SW Parking brake switch ON: Parking brake switch is ON position OFF: Parking brake switch is OFF position -

    Driver seat buckle switch: 

    DRIVER SEAT BUCKLE NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    D SEAT BUCKL SW Driver seat buckle switch ON: Driver seat buckle switch is ON position OFF: Driver seat buckle switch is OFF position -

    Seat memory switch: 

    SEAT MEMORY SWITCH NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    SEAT M1 SW Sear memory switch 1 ON: Seat memory switch 1 is ON position OFF: Seat memory switch 1 is OFF position -
    SEAT M2 SW Sear memory switch 2 ON: Seat memory switch 2 is ON position OFF: Seat memory switch 2 is OFF position -
    SEAT SET SW Sear set switch ON: Seat set switch is ON position OFF: Seat set switch is OFF position -

    Wireless door lock control: 

    WIRELESS DOOR LOCK CONTROL NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    WIRELESS OPER Wireless door lock control function ON: Wireless door lock control function OFF: Wireless door lock control does not function -
    HAZARD ANS BACK Hazard answer back of the wireless ON: Hazard answer back of the wireless is ON position OFF: Hazard answer back of the wireless is OFF position -

    Wireless door lock buzzer: 

    WIRELESS DOOR LOCK BUZZER NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    WIRELESS BUZZ VOL Wireless door lock buzzer volume OFF/MIN/MID3/MID2/MID1/MAX -
    DOWN/WIRELESS P/W DOWN W/transmitter ON: P/W DOWN W/transmitter ON position OFF: P/W DOWN W/transmitter OFF position -
    AUTO LOCK DELAY Auto lock time 30 s/60 sec -
    UNLOCK/2 OPER 2 times operation wireless unlock ON: 2 times operation wireless unlock is ON position OFF: 2 times operation wireless unlock is OFF position -
    ALARM FUNCTION Panic function ON: Panic function is ON position OFF: Panic function is OFF position -
    AUTO LOCK Auto lock ON: Auto lock is ON position OFF: Auto lock is OFF position -
    UNLK/KEY TWICE Unlock w/2 times D key operation ON: Unlock w/2 times D key operation is ON position OFF: Unlock w/ 2 times D key operation is OFF position -
    ALL UNLK/OPN-CL All Unlock w/ D door open-close ON: All Unlock w/ D door open-close is ON position OFF: All Unlock w/ D door open-close is OFF position -
    UNLOCK/PARK Unlock w/IG ON, shift P, speed 0 ON: Unlock w/ IG ON, shift P, speed is ON position OFF: Unlock w/ IG ON, shift P, speed is OFF position -
    AUTO LOCK/SHIFT Auto Lock/shift not P ON: Auto Lock/shift not P is ON position OFF: Auto Lock/shift not P is OFF position -

    Light control sensor: 

    LIGHT CONTROL SENSOR NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    LIGHTING TIME Lighting time 7.5 s/15 s/30 s -

    Open door warning light: 

    OPEN DOOR WARNING LIGHT NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    OPEN DOOR WARN Open door warning ON: Open door warning is ON OFF: Open door warning is OFF -

    Illumination: 

    ILLUMINATION NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    ILLUMI SYSTEM Operation of illumination ON: Illumination is ON position OFF: Illumination is OFF position -
    ILLUMINATION RATE Illumination rate information - -
    I/L ON/ACC OFF Light the I/L when ACC OFF ON: Light the I/L when ACC OFF is ON position OFF: Light the I/L when ACC OFF is OFF position -
    I/L ON/UNLOCK Interior light ON w/unlock ON: Interior light ON w/unlock is ON position OFF: Interior light ON w/unlock is OFF position -
    RESPONSE TIME Response time 0.1 s/1.0 s -

    Park / Neutral position switch: 

    PARK/NEUTRAL POSITION SWITCH NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    P/N POS SW P/N position switch ON: Sift is P position OFF: Sift is except P position -

    Alternator signal: 

    ALTERNATOR SIGNAL NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    ALT L SIG Alternator L terminal ON: Input voltage is 2.0 or 6.0 V OFF: No voltage -

    Others: 

    OTHERS NORMAL CONDITION

    Item Measurement Item/ Display (Range) Normal Condition Diagnostic Note
    SENSITIVITY Turn on iuminous intensity DARK2/DARK1/NORMAL/LIGHT1/LIGHT2 -
    LIGHT OFF DELAY Light auto OFF delay OFF/30 s/60 s/90 s -
    DISP EX ON SEN Display extinction luminous intensity DARK2/DARK1/NORMAL/LIGHT1/LIGHT2 -
    DISP EX OFF SEN Display extinction release luminous intensity DARK2/DARK1/NORMAL/LIGHT1/LIGHT2 -
  4. ACTIVE TEST 

    HINT:

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

    It is possible to display the DATA LIST during the ACTIVE TEST.

    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch ON.
    3. According to the display on tester, perform the "ACTIVE TEST".
    ACTIVE TEST

    Item Test Details Diagnostic Note
    HAZARD Turns Hazard light flasher relay ON/OFF -
    BUZZ CONT SOUND Wireless buzzer ON/OFF -
    BUZZ RESP SOUND Wireless buzzer ON/OFF -
    HEAD LIGHT Turns Head light relay ON/OFF -
    HEAD LIGHT (HI) Turns Head light relay ON/OFF -
    TAIL LIGHT Turns Tail light relay ON/OFF -
    DRL RLY Test Details) Turns DRL relay ON/OFF (Vehicle Condition) IG SW is ON, Engine is stopped and Light control SW is in OFF position. -
    DIMMER SIG Turns Head light dimmer relay ON/OFF -
    ILLUMI OUTPUT Test Details) Turns Interior light and Key illumination ON/OFF (Vehicle Condition) Interior light SW is in Door position -
    OPN DOR WRN LGT Open door warning light ON/OFF -
    P P/W UP/DOWN Passenger power window UP/DOWN -
    RL P/W UP/DOWN RL power window UP/DOWN -
    RR P/W UP/DOWN RR power window UP/DOWN -
    R ROOM LIGHT Rear room light ON/OFF -
    DOOM RLY CUT Doom light ON/OFF -
    DOOR LOCK Drive the Door lock motor at all doors LOCK/UNLOCK -
scientia non olet · About LEMON Manuals