set clock VOLKSWAGEN CORRADO 1990 Repair Manual

1.8L 4-CYL 8-VALVE & 1.8L 4-CYL 16-VALVE
Article Text (p. 10)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:40PM
2) Align crankshaft sprocket mark with mark on lower timing
belt cover. See Fig. 10. Install timing belt around camshaft sprocket.
Rotate tensioner clockwise until Timing Belt Tension Scale (VW 210)
reads 13-14. Rotate crankshaft 2 revolutions and check timing mark
alignment. To complete installation, reverse removal procedure.
CAMSHAFT OIL SEAL R & I
REMOVAL
1) Remove upper timing belt cover. Place crankshaft at TDC
with No. one cylinder on compression stroke. Remove timing belt from
camshaft sprocket. Remove camshaft sprocket. Remove Woodruff key.
Install camshaft sprocket bolt and washer until washer is tight
against camshaft.
2) Rotate inner part of Oil Seal Extractor (2085) outward 2
turns and tighten set screw. See Fig. 11. Lubricate threaded area of
extractor and push in as far as possible. Loosen set screw and turn
inner part of extractor until oil seal is removed.
INSTALLATION
Coat new seal seat and lips lightly with engine oil. Using
Installer (10-203), install seal until flush. On 16-valve engines, use
Special Hex Head Bolt (10-203/1). To complete installation, reverse
removal procedure.Fig. 11: Removing Camshaft Oil Seal
Courtesy of Volkswagen United States, Inc.
CAMSHAFT R & I (8-VALVE)
CAUTION: Mark components to ensure installation to original location
and position. Components are not interchangeable.
REMOVAL (8-VALVE)
1) Remove upper timing belt cover. See Fig. 6. Remove valve
cover. Place crankshaft at TDC with No. one cylinder on compression

A/C COMPRESSOR OIL CHECKING
Article Text
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:41PM
ARTICLE BEGINNING
1990 AIR CONDITIONING & HEAT
Compressor Oil Checking
ISOLATING COMPRESSOR
NOTE: Only compressors with stem-type service valves can be
isolated.
1) Connect service gauge set to the compressor service valves
and open compressor valves slightly (turn in clockwise). Start engine
and operate air conditioning. Slowly turn compressor suction valve
clockwise toward closed (front-seated) position.
2) When suction pressure is reduced to zero or less, turn off
engine and compressor and quickly turn suction valve stem in to full
front-seated position. Suction pressure should be slightly above zero.
Turn discharge valve into front-seated position.
3) To check oil level, slowly open compressor crankcase plug
to relieve any remaining pressure. After oil level is corrected, cap
service gauge ports on both valves. Back-seat suction service valve to
allow refrigerant to enter compressor. Open discharge valve halfway.
4) Loosen discharge service valve cap, allowing refrigerant
pressure to force air out of compressor. Back-seat service valve and
tighten cap. Compressor is now ready for operation.
REFRIGERANT OIL
Only new, pure, moisture-free refrigerant oil should be used
in the air conditioning system. This oil is highly refined and
dehydrated to a point where moisture content is less than 10 parts per
million. The oil container must be tightly closed at all times when
not in use, or moisture will be absorbed into the refrigerant oil from
the air.
SERVICING PRECAUTIONS
NOTE: Recent findings by the EPA indicate that refrigerant is
harmful to the earth's protective Ozone layer. When
discharging refrigerant, DO NOT allow refrigerant to enter
the atmosphere. If available, use refrigerant
recovery/recycle systems when discharging system. Always
follow manufacturer's instructions.
DISCHARGING SYSTEM PRECAUTIONS
If compressor has stem-type service valves, it can be
isolated and removed without discharging entire system. See ISOLATING
COMPRESSOR at the beginning of this article. Otherwise, discharge
system completely before loosening any fittings.

A/C COMPRESSOR SERVICING
Article Text
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:41PM
ARTICLE BEGINNING
1990 AIR CONDITIONING & HEAT
Compressor Service
* PLEASE READ THIS FIRST *
CAUTION: When discharging air conditioning system, use only approved
refrigerant recovery/recycling equipment. Make every attempt
to avoid discharging refrigerant into the atmosphere.
ISOLATING COMPRESSOR
NOTE: Only compressors with stem-type service valves can be
isolated.
1) Connect service gauge set to the compressor service valves
and open compressor valves slightly (turn in clockwise). Start engine
and operate air conditioning. Slowly turn compressor suction valve
clockwise toward closed (front-seated) position.
2) When suction pressure is reduced to zero or less, turn off
engine and compressor and quickly turn suction valve stem in to full
front-seated position. Suction pressure should be slightly above zero.
Turn discharge valve into front-seated position.
3) To check oil level, slowly open compressor crankcase plug
to relieve any remaining pressure. After oil level is corrected, cap
service gauge ports on both valves. Back-seat suction service valve to
allow refrigerant to enter compressor. Open discharge valve halfway.
4) Loosen discharge service valve cap, allowing refrigerant
pressure to force air out of compressor. Back-seat service valve and
tighten cap. Compressor is now ready for operation.
REFRIGERANT OIL
Only new, pure, moisture-free refrigerant oil should be used
in the air conditioning system. This oil is highly refined and
dehydrated to a point where moisture content is less than 10 parts per
million. The oil container must be tightly closed at all times when
not in use, or moisture will be absorbed into the refrigerant oil from
the air.
DISCHARGING SYSTEM PRECAUTIONS
CAUTION: When discharging air conditioning system, use only approved
refrigerant recovery/recycling equipment. Make every attempt
to avoid discharging refrigerant into the atmosphere.
If compressor has stem-type service valves, it can be
isolated and removed without discharging entire system. Otherwise,
discharge system completely using approved refrigerant

A/C SYSTEM PRECAUTIONS
Article Text (p. 3)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:41PM
refrigerant into the system.
On 2-piece can taps, be certain tap handle is turned fully
inward to the closed position. Check that locking base is turned to
its outer limit. Securely engage locking lugs over the can flange.
Turn entire tap assembly (without disturbing the closed setting)
downward into the locking base to pierce the can. DO NOT open tap
until ready to dispense into system.
SCREW TYPE SEAL CANS
Ensure can tap is fully closed. Screw refrigerant can into
can tap fitting until tight. This will pierce the can. Connect tap to
center hose on manifold gauge set. DO NOT open tap until ready to
dispense R-12 into system.
WARNING: DO NOT open high side hand valve while air conditioning
system is in operation. This high pressure could rupture can
or fitting at safety can valve, resulting in damage and
personal injury.
CONNECTING LINES & FITTINGS
A new "O" ring should be used in all instances when
connecting lines and fittings (dip "O" ring in clean refrigeration oil
and make certain it is not twisted during installation). Always use
two wrenches to avoid twisting or distorting lines and fittings,
tighten coupling nuts securely.
PLACING SYSTEM IN OPERATION
After component replacement and/or system servicing has been
completed and all connections have been made, proceed as follows:
1) Evacuate the system using a vacuum pump.
2) Charge the system with new R-12 (refrigerant) according to
each individual vehicle as outlined in the GENERAL SERVICING article.
Also see Refrigerant Capacity in this Section.
3) Leak test the system, with particular attention to all new
connections and components.
4) Make a performance test of the system. Never assume that a
recharging has automatically corrected a problem.
COMPRESSOR REMOVAL INFORMATION - ISOLATION METHOD
On systems which have compressors equipped with stem-type
service valves (Tecumseh), it is possible to isolate the compressor
for removal.
Isolating
Turn both high and low pressure manual valves to extreme
clockwise (front seat) position. Loosen cap on high pressure manual

A/C-HEATER SYSTEM - MANUAL
Article Text (p. 5)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:41PM
MICROSWITCH
Loosen microswitch mounting screw. Move microswitch so switch
is on when lever is at maximum A/C, NORM (normal), BI-LEVEL or extreme
right position, and off when lever is at VENT or HEAT position.
Tighten microswitch mounting screw. Recheck operation.
TEMPERATURE SWITCH
Move temperature lever to full cool position. Loosen
temperature switch mounting screw. Move temperature switch
counterclockwise to full stop position. Tighten temperature switch
mounting screw.
TROUBLE SHOOTING
NO COOLING
1) Ensure fan motor operates in all 4 speeds, air duct closes
off outside air and heater water valve is closed. Adjust belt tension.
2) Inspect receiver-drier pressure seal. If seal is good, go
to step 5). If seal is broken, evacuate and recharge system. If system
cools properly, testing is complete. If system does not cool, connect
pressure gauges.
3) Set engine speed at 2500 RPM. Insert thermometer in left
register and close all others. Place controls on high blower and
maximum cooling. With vehicle out of direct sunlight, close all
windows. Radiator fan should come on with system pressure at 200 psi
(14 kg/cmý).
NOTE: If system doors allow air leaks, evaporator will freeze up
and testing will not be possible.
4) If fan does not operate, replace pressure switch. Ensure
system is okay. If fan does come on, turn engine off and check for
condenser obstructions and blocked airflow.
5) Turn air conditioner on and off with temperature control
lever. Ensure compressor clutch engages. Push lever to extreme right
position and back again. A click should be heard from compressor
clutch. If a click is not heard, check for voltage at clutch coil wire
with switch on. If voltage is present, replace clutch coil. If voltage
is not present, check wiring or replace thermostatic switch.
6) If compressor clutch operates, check gauge readings. If
both are low, locate leak and recharge system. If both are high,
replace expansion valve. If low side is too high and high side reads
too low, replace or rebuild compressor.
INSUFFICIENT COOLING
1) Ensure fan motor operates at all 4 speeds, air duct closes
off outside air intake and heater water valve is closed. Adjust
compressor belt tension and clean condenser.

D - ADJUSTMENTS
Article Text (p. 7)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:43PM
together. Turn idle speed screw until idle speed is correct. To adjust
timing, see CHECKING & ADJUSTING under IGNITION TIMING in this
article.
3) Ensure all vehicle electrical equipment is off. Place
exhaust gas analyzer in exhaust pipe. See IDLE SPEED & CO LEVEL table.
If adjustment is needed, go to next step.
4) If adjustment is needed in step 2). Remove intake air
sensor from engine. Center punch plug in CO adjusting hole. Using a
3/32" drill bit, drill hole 5/32" (4 mm) deep in center of plug.
Remove any metal shavings. Screw in a sheet metal screw and remove
plug using pliers to pry plug out.
5) Disconnect oxygen sensor connector on left side of engine
compartment (Green wire). Start engine. Set idle speed and CO reading
by alternately turning mixture and idle speed adjustment screws.
Reconnect oxygen sensor and idle stabilizer connectors. Let engine
idle for 2 minutes.
6) Check CO value. If incorrect, repeat adjusting procedure.
If correct turn ignition off. Drive in new adjusting hole plug flush
with air intake sensor. Remove all test equipment and reconnect all
hoses and wiring.
NOTE: Do not push down on adjustment screw and do not accelerate
engine with wrench in plate. Remove wrench after each
adjustment and accelerate engine briefly before measuring
current reading. Always adjust from a high to a low reading.
IDLE SPEED & CO LEVELÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication Idle RPM CO Level
Cabriolet .................. 850-1000 ................... 0.3-1.2%
Fox ........................ 800-1000 ................... 0.3-1.2%
Golf ....................... 800-1000 ................... 0.3-1.2%
Golf GT ..................... 800-900 ................... 0.3-1.2%
GTI ........................ 800-1000 ................... 0.3-1.2%
Jetta ...................... 800-1000 ................... 0.3-1.2%
Vanagon ..................... 830-930 ................... 0.3-1.2%
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ THROTTLE STOP SCREW
NOTE: Stop screw is set by manufacturer and should not be moved.
If basic factory setting has been changed, turn throttle stop
screw counterclockwise until there is a gap between stop and screw.
Turn screw in until it just touches stop. Turn screw 1/2 turn (180
degrees) further. Check and adjust idle speed and CO.
IDLE & FULL THROTTLE SWITCH ADJUSTMENTS
IDLE SWITCH ADJUSTMENT DIGIFANT II (EXCEPT VANAGON)

INSTRUMENT PANEL
Article Text
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:46PM
ARTICLE BEGINNING
1989-90 ACCESSORIES & EQUIPMENT
Volkswagen Instrument Panels
Cabriolet, Fox, Golt, GTI, Jetta, Jetta GLI, Vanagon
DESCRIPTION & OPERATION
Instrument cluster for most models includes speedometer, fuel
gauge and temperature gauge. Optional instruments include clock,
tachometer, voltmeter and oil temperature gauge.
Printed circuit provides voltage to gauges. A voltage
regulator attached to the printed circuit controls voltage to fuel and
temperature gauges. Light Emitting Diodes (LEDs) are used for most
warning lights. To replace diodes, pull from printed circuit sockets.
NOTE: Volkswagen Tester (1301) is required for resistance tests.
Tester settings are numerical. Settings do not indicate
resistance in ohms. Manufacturer does not supply resistance
value in ohms.
TESTING
FUEL & TEMPERATURE GAUGE
1) Disconnect wire from fuel tank or temperature sending
unit. Connect VW tester between wire and ground. Turn ignition on and
allow 2 minutes for gauge reading to stabilize. Use FUEL GAUGE TESTING
or TEMPERATURE GAUGE TESTING table to compare gauge reading. Gauge
should be within one pointer width of specification.
2) If gauge needle does not move, check continuity between
sender wire and gauge. If needle moves, but does not match
specifications, replace gauge. If gauge works correctly with tester,
but not sending unit, replace sending unit.
FUEL GAUGE TESTINGÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication Dial Setting Indicator
Cabriolet & Fox .......... 55 ................ Full
560 ................Empty
Golf, GTI, Jetta
& Jetta GLI .............. 52 ................ Full
550 ................Empty
Vanagon .................. 50 ................ Full
320 ................Empty
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄTEMPERATURE GAUGE TESTING
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ

MAINTENANCE INFORMATION
Article Text (p. 14)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:48PM
Right Low Beam
3 - 10 Amp (Red)
Instrument Lights, License Plate Lights
4 - 15 Amp (Blue)
Rear Window Wiper, Sliding Roof
5 - 15 Amp (Blue)
Windshield & Rear Window Washer, Windshield Wiper
6 - 20 Amp (Yellow)
Air Conditioner, Fresh Air Fan
7 - 10 Amp (Red)
Right Tail & Side Lights
8 - 10 Amp (Red)
Left Tail & Side Lights
9 - 20 Amp (Yellow)
Rear Window Defroster, Mirror Heating
10 - 15 Amp (Blue)
Foglights
11 - 10 Amp (Red)
Left High Beam, High Beam Indicator
12 - 10 Amp (Red)
Right High Beam
13 - 10 Amp (Red)
Horn, Radiator Fan
14 - 15 Amp (Blue)
Back-Up Lights, Electric Mirrors, Heated Washer Jets
15 - 10 Amp (Red)
Electronic Ignition, Idle Stabilizer,
Deceleration Fuel Shut Off
16 - 15 Amp (Blue)
Warning/Indicator Lights, Multi-Function Indicator, Glove Box
Light, Cassette Storage Light, Rear Spoiler Control Unit
17 - 10 Amp (Red)
Emergency Flashers, Turn Signals
18 - 20 Amp (Yellow)
Fuel Pump, Heated Oxygen Sensor
19 - 30 Amp (Green)
Radiator Fan, Air Conditioner
20 - 10 Amp (Red)
Brake Lights, Cruise Control
21 - 15 Amp (Blue)
Interior Compartment Lights, Cigarette Lighter, Digital Clock
Central Locking System, Rear Spoiler Adjustment
22 - 10 Amp (Red)
Radio
Relay & Circuit Breaker Identification
1 - A/C Control Module Relay
2 - Rear Window Wiper/Washer Relay
3 - ECM Power Supply Relay
4 - Load Reduction Relay
5 - Low Coolant Level

MAINTENANCE INFORMATION
Article Text (p. 16)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:48PM
WARNING: Always disconnect battery ground cable before servicing
"high-current fuses. It is recommended that "high-current"
fuses be replaced by a qualified technician.
Fuse & Circuit Breaker Identification
1 - 10 Amp (Red)
Left Low Beam
2 - 10 Amp (Red)
Right Low Beam
3 - 10 Amp (Red)
Instrument Lights, License Plate Lights
4 - 15 Amp (Blue)
Rear Window Wiper, Sliding Roof
5 - 15 Amp (Blue)
Windshield & Rear Window Washer, Windshield Wiper
6 - 20 Amp (Yellow)
Air Conditioner, Fresh Air Fan
7 - 10 Amp (Red)
Right Tail & Side Lights
8 - 10 Amp (Red)
Left Tail & Side Lights
9 - 20 Amp (Yellow)
Rear Window Defroster, Mirror Heating
10 - 15 Amp (Blue)
Foglights
11 - 10 Amp (Red)
Left High Beam, High Beam Indicator
12 - 10 Amp (Red)
Right High Beam
13 - 10 Amp (Red)
Horn, Radiator Fan
14 - 15 Amp (Blue)
Back-Up Lights, Electric Mirrors, Heated Washer Jets
15 - 10 Amp (Red)
Electronic Ignition, Idle Stabilizer,
Deceleration Fuel Shut Off
16 - 15 Amp (Blue)
Warning/Indicator Lights, Multi-Function Indicator, Glove Box
Light, Cassette Storage Light, Rear Spoiler Control Unit
17 - 10 Amp (Red)
Emergency Flashers, Turn Signals
18 - 20 Amp (Yellow)
Fuel Pump, Heated Oxygen Sensor
19 - 30 Amp (Green)
Radiator Fan, Air Conditioner
20 - 10 Amp (Red)
Brake Lights, Cruise Control
21 - 15 Amp (Blue)
Dome & Luggage Compartment Lights, Cigarette Lighter, Clock
Central Locking System, Multi-Function Indicator,
Rear Spoiler Adjustment, Engine Diagnostic

MAINTENANCE INFORMATION
Article Text (p. 18)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:48PM
WARNING: Always disconnect battery ground cable before servicing
"high-current fuses. It is recommended that "high-current"
fuses be replaced by a qualified technician.
Fuse & Circuit Breaker Identification
1 - 10 Amp (Red)
Left Low Beam
2 - 10 Amp (Red)
Right Low Beam
3 - 10 Amp (Red)
Instrument Lights, License Plate Lights
4 - 15 Amp (Blue)
Rear Window Wiper, Sliding Roof
5 - 15 Amp (Blue)
Windshield & Rear Window Washer, Windshield Wiper
6 - 20 Amp (Yellow)
Air Conditioner, Fresh Air Fan
7 - 10 Amp (Red)
Right Tail & Side Lights
8 - 10 Amp (Red)
Left Tail & Side Lights
9 - 20 Amp (Yellow)
Rear Window Defroster, Mirror Heating
10 - 15 Amp (Blue)
Foglights
11 - 10 Amp (Red)
Left High Beam, High Beam Indicator
12 - 10 Amp (Red)
Right High Beam
13 - 10 Amp (Red)
Horn, Radiator Fan
14 - 15 Amp (Blue)
Back-Up Lights, Electric Mirrors, Heated Washer Jets
15 - 10 Amp (Red)
Crankcase Ventilation Heating Element
16 - 15 Amp (Blue)
Warning/Indicator Lights, Multi-Function Indicator, Glove Box
Light, Cassette Storage Light, Rear Spoiler Control Unit
17 - 10 Amp (Red)
Emergency Flashers, Turn Signals
18 - 20 Amp (Yellow)
Fuel Pump, Heated Oxygen Sensor Control
19 - 30 Amp (Green)
Radiator Fan, Air Conditioner
20 - 10 Amp (Red)
Brake Lights, Cruise Control
21 - 15 Amp (Blue)
Dome & Luggage Compartment Lights, Cigarette Lighter, Clock
Central Locking System, Multi-Function Indicator,
Rear Spoiler Adjustment
22 - 10 Amp (Red)