1993 VOLKSWAGEN CORRADO Repair Manual

DEFOGGER - REAR WINDOW
Article Text
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:08PM
ARTICLE BEGINNING
1993 ACCESSORIES & EQUIPMENT
Volkswagen Rear Window Defoggers
Volkswagen; Cabriolet, Corrado SLC, EuroVan,
Fox, Golf, GTI, Jetta, Passat
DESCRIPTION & OPERATION
Ignition must be on for rear window defogger to operate.
Power to control switch is applied through fuse in fuse block. An
indicator light in the control switch comes on when the defogger is
turned on. Control switch also provides power to heating element in
both outside mirrors.
TROUBLE SHOOTING
DEFOGGER DOES NOT WORK
Check for blown fuse, defective defogger switch, open wiring
or poor connections. Check for breaks in rear window defogger grid.
See FILAMENT TEST under TESTING.
INDICATOR LIGHT DOES NOT WORK
Check for burned bulb, blown fuse, open wiring or poor
connection.
TESTING
SYSTEM TEST
Ensure and control switch are okay. Turn ignition and control
switch on. After a few minutes, feel glass for warmth. If glass is not
warm, use a test light to check for battery voltage at grid feed wire.
If no voltage is present, check control switch.
FILAMENT TEST
1) To locate breaks in grid filaments, connect test light
negative lead to ground side of grid. Touch opposite (positive) side
of grid with test light probe. If test light glows, grid line is okay.
Test light will glow dimmer as probe is moved toward ground side of
grid.
2) If test light does not glow, grid line is broken. To
locate break, move probe along grid line toward ground side of heat
grid until test light glows, indicating area of damage.
WIRING DIAGRAMS

DEFOGGER - REAR WINDOW
Article Text (p. 2)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:08PM
See appropriate chassis wiring diagram in WIRING DIAGRAMS.
END OF ARTICLE

DOOR LOCKS - POWER
Article Text
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:08PM
ARTICLE BEGINNING
1993 ACCESSORIES & EQUIPMENT
Volkswagen Power Door Locks
Volkswagen; Corrado SLC, Passat
DESCRIPTION & OPERATION
Power locks are an electronically controlled, vacuum operated
system. Components include bi-pressure pump, tubing and an activator
for each door. See Fig. 1, 2 or 3.
The power lock system operates from either passenger or driver's door
lock. If the key is inserted in either door or trunk lock and held in
the unlock position, all locks will be operated simultaneously. Power
lock system will not operate on door(s) or trunk lid if left
unlatched.Fig. 1: Power Door Lock System Vacuum Diagram &
Component Locator (Corrado SLC)
Courtesy of Volkswagen United States, Inc.

DOOR LOCKS - POWER
Article Text (p. 2)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:08PMFig. 2: Power Door Lock System Vacuum Diagram &
Component Locator (Passat)
Courtesy of Volkswagen United States, Inc.Fig. 3: Power Door Lock System Vacuum Diagram &
Component Locator (Passat Wagon)
Courtesy of Volkswagen United States, Inc.

DOOR LOCKS - POWER
Article Text (p. 3)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:08PM
TROUBLE SHOOTING
SYSTEM DOES NOT OPERATE
1) Power & Ground Check
Obtain radio security code. Disconnect battery cable
terminals. Disconnect control module 12-pin connector. Connect
negative lead to control module wiring harness connector terminal No.
"3". See Fig. 4. Connect positive voltmeter lead to terminals No. "1".
If voltage is present, go to next step. If voltage is not present,
repair open circuit.Fig. 4: Identifying Control Module Wiring Harness Connector Terminals
Courtesy of Audi of America, Inc.
2) Door Lock Switch Check (Driver's Door)
Connect negative lead to control module wiring harness
connector terminal No. "3". Connect positive voltmeter lead to
terminals No. "7". Insert key in driver's door and turn to lock
position. If voltage is present, go to next step. If voltage is not
present, repair circuit or switch as necessary.
3) Door Lock Switch Check (Passenger's Door)
Connect negative lead to control module wiring harness
connector terminal No. "3". Connect positive voltmeter lead to
terminals No. 10. Insert key in passenger's door and turn to unlock
position. If voltage is present, go to next step. If voltage is not
present, repair circuit or switch as necessary.
4) Activator Check
Reconnect control module 12-pin connector. Open trunk lid.
Close all doors and lock with key. Disconnect control module 12-pin
connector. Connect ohmmeter negative lead to control module wiring
harness connector terminal No. "3". Connect positive lead to terminal
No. "4". If continuity is present, go to next step. If continuity is
not present, repair circuit or activator as necessary.
5) Reconnect control module 12-pin connector. Open trunk lid.
Unlock all doors with key. Disconnect control module 12-pin connector.
Connect voltmeter negative lead to control module wiring harness
connector terminal No. "3". Connect positive lead to terminal No. "4".
If voltage is present, replace bi-pressure pump and control module. If
voltage is not present, repair circuit or activator as necessary.

DOOR LOCKS - POWER
Article Text (p. 4)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:08PM
VACUUM SYSTEM CHECK
Door Lock System Does Not Operate
Locate vacuum hose junction. See Fig. 1, 2 or 3. Individually
remove vacuum hose from junction box. Plug junction box port. If door
lock system operates, repair vacuum in hose. If door lock system does
not operate, repeat procedure for all other vacuum circuit at junction
box.
TESTING
SYSTEM TEST
Ensure vehicle battery is fully charged, fuses are okay and
no leaks are present in vacuum system. When activated, bi-pressure
should operate longer than 5 seconds and then pulse.
CONTROL MODULE TEST
Perform all procedures under TROUBLESHOOTING. If system still
does not perform correctly, replace control module.
REMOVAL & INSTALLATION
CAUTION: When battery is disconnected, vehicle computer and memory
systems may lose memory data. Driveability problems may
exist until computer systems have completed a relearn
cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL
INFORMATION before disconnecting battery.
BI-PRESSURE PUMP
Removal & Installation
Remove right rear luggage trim. Remove bi-pressure pump
bracket and insulation. Remove bi-pressure pump. See Fig. 5. To
install, reverse removal procedure.Fig. 5: Locating Bi-Pressure Pump
(Corrado SLC Is Shown; Passat Is Similar)
Courtesy of Volkswagen United States, Inc.

DOOR LOCKS - POWER
Article Text (p. 5)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:08PM
FUEL DOOR ACTIVATOR
Removal & Installation
Remove pressure line. Remove mounting screws. See Fig. 6.
Open activator hinge and unhook linkage. Remove activator. To install,
reverse removal procedure.Fig. 6: Exploded View Of Fuel Door Activator
Courtesy of Volkswagen United States, Inc.
FRONT DOOR MASTER ACTIVATORS
Removal & Installation
Close window and remove door trim. Remove vacuum hose and
connector from switch element. See Fig. 7. Open activator hinge.
Unhook lock linkage. Remove front master activator. To install,
reverse removal procedure.Fig. 7: Locating Front Master Activator
Courtesy of Volkswagen United States, Inc.

DOOR LOCKS - POWER
Article Text (p. 6)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:09PM
REAR DOOR MASTER ACTIVATORS
Removal & Installation
Close window and remove door trim. Remove pressure line and
connector from switch element. See Fig. 8. DISCONNECT inner door
opening mechanism and locking rod. Remove vacuum hose from retaining
clips. Open activator hinge. Unhook lock linkage. Remove rear master
activator. To install, reverse removal procedure.Fig. 8: Locating Front Master Activator
Courtesy of Volkswagen United States, Inc.
LIFTGATE ACTIVATOR
Removal & Installation
Rotate liftgate activator clips 1/4 turn to unlock. See
Fig. 9. Remove inner panel. Remove pressure line from activator.
Remove tension rod clip. Remove mounting bolts. Remove activator. To
install, reverse removal procedure.Fig. 9: Locating Trunk Lid Activator Clips
Courtesy of Volkswagen United States, Inc.