Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Celica 1988-1989.1993-1994.2000 Approved Toyota Celica 1994 defogger rear window

<< Back | Home

Most service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.



Image preview - the first page of the document



>> Download defogger rear window documenatation <<

Text preview - extract from the document

                               DEFOGGER - REAR WINDOW

                                      1994 Toyota Celica




         1994 ACCESSORIES & EQUIPMENT
         Toyota Motor Sales, U.S.A., Inc.
         Rear Window Defoggers

         Celica

    DESCRIPTION & OPERATION
NOTE:   Some systems use an integrated or multipurpose relay as
        defogger relay. Some systems use a timer between switch and
        heating grid, and some use only a switch and heating grid.

         Rear window defogger systems use a heating wire grid bonded
to the inside of window. Heat is regulated by a control switch and a
relay/timer. Most systems have an indicator light to show system is
operating.
         Power to the control switch is through a fuse in the fuse
block. Timer relay will keep power to the grid for 12-18 minutes, or
until the ignition is turned off.

    TROUBLE SHOOTING

    DEFOGGER DOES NOT WORK
         Blown fuse or poor contact. Defogger switch defective. Poor
connections. Broken wire. Relay defective.

    INDICATOR LIGHT DOES NOT WORK
        Bulb burned out. Open wire or poor connection.

    TESTING

    SYSTEM TESTING
         1) Ensure all in-line fuses or circuit breakers are okay.
Turn ignition and control switches to ON position. Glass should feel
warm after a few minutes.
         2) If glass is not warm, use a test light or voltmeter to
check for battery voltage at grid feed wire. If voltage is not
correct, check wiring harness, control switch and timer/relay.

    SWITCH TEST
         1) To test defogger switch without timer, ensure continuity
exists between terminals No. 2, No. 3, and No. 6 with switch on. See
Fig. 1. With switch off, continuity should not exist between terminals
No. 2, No. 3, and No. 6. Check for continuity between terminals No. 4
and No. 5 (light bulb). Continuity should exist at all times. If
continuity is not as specified, replace switch.
         2) To test defogger switch with timer, connect battery
positive lead to terminal No. 3, and battery negative lead to terminal
No. 2. See Fig. 2. Connect 3.4-watt test light between terminals No. 2
and No. 6. Push defogger switch. Ensure test light comes on for 12-18
minutes and then goes out. If switch does not operate as specified,
replace switch.
Fig. 1: Identifying Defogger Switch Terminals
Courtesy of Toyota Motor Sales, U.S.A., Inc.




Fig. 2: Testing Defogger Switch With Timer
Courtesy of Toyota Motor Sales, U.S.A., Inc.

    RELAY TEST
         1) Using an ohmmeter, ensure continuity exists between
terminals No. 1 and No. 2. See Fig. 3. Continuity should not exist
between terminals No. 3 and No. 5. If continuity is not as specified,
replace relay.
         2) Connect battery positive lead to terminal No. 1 and
battery negative lead to terminal No. 2. Continuity should exist
between terminals No. 3 and No. 5. If operation is not as specified,
replace relay.




Fig. 3: Testing Defogger Relay
Courtesy of Toyota Motor Sales, U.S.A., Inc.

    GRID FILAMENT TESTING
NOTE:    When testing grid wires with voltmeter, wrap aluminum foil
         around end of test probe, then press foil to grid wire. This
         will prevent probe from damaging grid wire.

         1) To locate breaks in grid wire filaments, attach a
voltmeter to middle portion of each filament. Attach other meter probe
to vertical section of window grid. See Fig. 4.
         2) If a grid is broken, meter will register zero volts or
about 10 volts, depending on if grid is broken between or outside test
leads. If wire is unbroken, meter will register about 5 volts. To
locate break, move probe along wire until voltage changes abruptly.
Fig. 4: Testing Grid Filament
Courtesy of Toyota Motor Sales, U.S.A., Inc.

    ON-VEHICLE SERVICE
    GRID FILAMENT REPAIR
         Clean broken wire tips thoroughly. Place masking tape along
both sides of broken wire. See Fig. 5. Apply Repair Paste (DuPont
4817) to broken section of grid. Remove masking tape after paste has
dried. Wait 24 hours before using defogger.




Fig. 5: Repairing Rear Defogger Grid Filament
Courtesy of Toyota Motor Sales, U.S.A., Inc.

    WIRING DIAGRAMS
Fig. 6:   Rear Window Defogger Wiring Diagram

◦ Jabse Service Manual Search 2026 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo