ect LEXUS SC300 1991 Service Repair Manual

ASSEMBLY OF FRONT DOOR
(See page BO±31)
1. BEFORE INSTALLING PARTS, COAT THEN WITH MP GREASE
(a) Apply MP grease to the sliding surface and rollers of the
window regulator.
(b) Apply MP grease to the sliding surface of the door lock.
(c) Apply MP grease to the door glass guide rollers.
2. INSTALL SIDE PROTECTION MOULDING (a) Insert the top of the clips into the panel hole and tap themoulding onto the panel.
(b) Install two nuts.
3. INSTALL OUTSIDE HANDLE AND KEY CYLINDER (a) Install the key cylinder and the outside handle with three
bolts.
(b) Connect the connector to the key cylinder.
4. INSTALL DOOR LOCK (a) Install the door lock with three screws.
(b) Install the two links to the outside h andle and key
cylinder.
(c) Connect the connector.
5. INSTALL WINDOW REGULATOR Install the regulator with six nuts.
6. INSTALL GLASS GUIDE AND DOOR GLASS (a) Install the front glass guide with three screws to the door
panel.
(b) Insert the rear glass guide with the door glass inside the door panel.
(c) In sta ll th e gla ss to th e fro n t gla ss gu id e an d th e regulator.
(d) Install the rear glass guide with four screws.
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7. INSTALL FRONT DOOR INNER WEATHERSTRIPInsert the claw of the clips into the upper panel hole and push
the moulding onto the panel.
8. INSTALL FRONT DOOR BELT MOULDING HINT:
wIf the adhesive power of the tape is reduced, replace itwith new tape.
wInstall the moulding with eight screws and five nuts.
9. INSTALL DOOR INSIDE PANEL FRAME Install the frame with three bolts.
10. CONNECT WIRE HARNESS TO DOOR PANEL Install the clamps onto the panel.
11. INSTALL SPEAKER ASSEMBLY (a) Install the speaker assembly with four screws.
(b) Connect the connector to the speaker.
12. INSTALL SERVICE HOLE COVER HINT: Before installing the service hole cover, peel off the
backing paper from the silencer.
Seal the service hole cover with adhesive.
13. INSTALL SCREW GROMMETS Install two grommets as shown.
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14. INSTALL OUTSIDE REAR VIEW MIRROR(a) Install the mirror with two bolts, connect the connector.
(b) I n s t a l l t h e s peaker with two bolts, connect the
connector.
15. INSTALL FRONT DOOR WEATHERSTRIP Push down on the nine clips of the weatherstrip.
16. INSTALL DOOR TRIM UPPER PANEL (a) Push the panel into the frame.
(b) Tap in the three clips.
(c) Install the panel with six screws.
17. INSTALL DOOR SPEAKER GRILLE Slide the grille and tap the grille to install it.
18. INSTALL DOOR TRIM (a) Install the front door trim ornament and the door insidehandle with eleven nuts.
(b) Install the armrest with eight screws.
(c) Install the door curtesy switch.
(d) Install the two cables as shown.
(e) Connect the connector to the door curtesy switch.
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(f) Install the door trim to the door panel with eight screwsand two caps.
19. INSTALL DOOR INSIDE HANDLE BEZEL COVER With the door handle in open position, insert the cover into
the bezel.
20. INSTALL ARMREST BASE PANEL (a) Connect the connector.
(b) Slide the panel rearward and tap the panel to install it.
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2. INSPECT BRAKE WARNING LIGHT(a) Disconnect the connector from the brake fluid warningswitch.
(b) Release the parking brake pedal.
(c) Connect terminals on the wire harness side of the level warning switch connector.
(d) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or wire har-
ness.
(Parking Brake Switch)
REMOVAL AND INSTALLATION OF PARKING
BRAKE SWITCH
1. REMOVE PARKING BRAKE SWITCH
(a) Remove the driver's seat.
(See page BO±58)
(b) Disconnect the connector and remove switch.
2. INSTALL PARKING BRAKE SWITCH For installation follow the removal procedure in reverse.
INSPECTION OF PARKING BRAKE SWITCH
1. INSPECT PARKING BRAKE SWITCH
(a) Check that there is continuity between terminal andswitch body with the switch ON (switch pin released).
(b) Check that there is no continuity between terminal and switch body with the switch OFF (switch pin pushed in.)
If continuity is not as specified, replace the switch or inspect
ground point.
2. INSPECT BRAKE WARNING LIGHT (a) Disconnect the connector from the parking brake switchand brake fluid warning switch.
(b) Ground terminal on the wire harness side connector.
(c) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or inspect
wire harness.
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BODY ELECTRICAL SYSTEM Combination Meter
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( Coolant Level Warning Switch)
REMOVAL AND INSTALLATION OF COOLANT
LEVEL WARNING SWITCH
1. REMOVE COOLANT LEVEL WARNING SWITCH(a) Disconnect the connector.
(b) Remove the boot.
(c) Using the notches in the head of switch, turn the switchcounterclockwise and remove it.
NOTICE: Do not remove when engine is hot.
2. INSTALL COOLANT LEVEL WARNING SWITCH For installation, follow the removal procedure in reverse.
INSPECTION OF COOLANT LEVEL WARNING
SWITCH
1. INSPECT COOLANT LEVEL WARNING SWITCH(Continuity)
(a) Remove the radiator cap and open the radiator drainclock.
NOTICE: Do not remove when engine is hot.
(b) Drain the coolant about 1 liter. (1.1 US qts, 0.9 lmp. qts)
(c) Check that there is continuity between terminals (float down).
(d) Close radiator drain cock and fill the cooling system with
coolant.
(e) Check that there is no continuity between terminals (float up).
If continuity is not as specified, replace the switch.
2. INSPECT COOLANT LEVEL WARNING LIGHT (a) Disconnect the connector from the coolant level warning
switch and ground terminal 1 on the wire harness side
connector.
(b) Start the engine, check that the warning light lights up.
If the warning light does not light up, inspect the bulb or wire
harness.
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BODY ELECTRICAL SYSTEM Combination MeterBE±117
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POWER WINDOW CONTROL
SYSTEM
Description
The Power Window System raises and lowers the window glass in each door usi\
ng electrical power. The compo-
nent parts of this system and their functions are described in the following\
table.
Parts NameFunction
Theft Deterrent and
Door Lock
Control ECUCurrent is sent to the power window main relay only when the ignition sw\
itch
is on or within a specified period after the ignition switch is turned o\
ff.
Power Window
Main RelayCurrent from the theft deterrent and door lock control ECU to the power
window main relay switches large current from the master switch ON and O\
FF.
Master SwitchThis switch turns current to each power window motor ON and OFF and
switches it. It also includes a circuit for ºOne Touch Power Windowº use of
the driver's window and a built±in window lock switch which controls the
operation of all power window switches.
Power Window
SwitchThis switch is installed on each door except on the driver's door. It is supplied
with current from the master siwtch and turns the current to the motor O\
N and
OFF and switches the current. This switch will not operate when the wind\
ow
lock switch inside the master switch is in the LOCK position.
Power Window
MotorThis motor moves the window regulator directly when current is supplied \
to it
from the master switch or power window switch. The motor has a built±\
in
circuit breaker.
Parts Location
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Wiring and Connector Diagrams
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Parts Inspection
(Power Window Master Switch)
REMOVAL AND INSTALLATION OF
POWER WINDOW MASTER SWITCH
(See page BO±33)
INSPECTION OF POWER WINDOW
MASTER SWITCH
INSPECT POWER WINDOW MASTER SWITCH
(Continuity)
Inspect the switch continuity between terminals.
Window operation Driver's Passenger's
Terminal
Switch position
UP
OFF
DOWN
UP
OFF
DOWN
Window Unlock
Window Lock
If continuity is not as specified, replace the master siwtch.
(Illumination)
(a) Set the window lock switch to the unlock position.
(b) Connect the positive (+) lead from the battery to terminal
4 and the negative (±) lead to terminal 8, check that all
the illuminations light up.
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(c) Set the window lock switch to the lock position, checkthat all the passenger's power window switch
illuminations go out.
If operation is not as specified, replace the master switch.
(One Touch Power Window System/Current of Circuit)
Inspection using an ammeter.
(a) Disconnect the connector from the master switch.
(b) C onnect the positive (+) lead from the ammeter to
terminal 9 on the wire harness side connector and the
negative (±) lead to negative terminal of the battery.
(c) Connect the positive (+) lead from the battery to terminal
10 on the wire harness side connector.
(d) As the window goes down, check that the current flow is approximately 7 amperes.
(e) Check that the current increases approximately 14.5 amperes or more when the window stops going down.
HINT: The circuit breaker opens some 4±40 seconds after the
window stops going down, so that check must be made be-
fore the circuit breaker operates.
If the operation is as specified, replace the master switch.
Inspection using an ammeter with a current±measuring
probe.
(a) Remove the master switch with connector connected.
(b) Attach a current±measuring probe to terminal 4 of the
wire harness.
(c) Turn the ignition switch ON and set the power window switch in the down position.
(d) As the window goes down, check that the current flow
is approximately 7 amperes.
(e) Check that the current increases approximately 14.5 amperes or more when the window stops going down.
HINT: The circuit breaker opens some 4±40 seconds after the
window stops going down, so that check must be made be-
fore the circuit breaker operates.
If operation is as specified, replace the master switch.
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