1993 VOLKSWAGEN CORRADO Repair Manual

I - SYSTEM/COMPONENT TESTS
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 09:11PM
reinstalling fuel rail, ensure that "O" rings are not damaged.Fig. 3: Testing Fuel Injectors & Circuit (Corrado SLC)
Courtesy of Volkswagen United States, Inc.
OXYGEN SENSOR CONTROL
IDLE CONTROL SYSTEM
IDLE AIR CONTROL (IAC) VALVE
Corrado SLC (2.8L)
1) Connect Scan Tester (VAG 1551) to Data Link Connectors
(DLC) located in center console, in front of shift lever. With scan
tester in OUTPUT DIAGNOSTIC TEST MODE, test IAC valve. For more
information, see the G - TESTS W/CODES article in this section.
2) To check IAC valve triggering circuit, turn ignition off.
Disconnect wiring harness connector from idle air control valve.
Connect LED Tester (US 1115) to wiring harness connector terminals No.
1 and 2.
3) Turn ignition on. Perform OUTPUT DIAGNOSTIC TEST MODE
until IAC valve is triggered. LED tester must flash. If LED tester
does not flash, check IAC valve circuit.
4) If LED tester flashes, disconnect wiring harness connector
from idle air control valve. Using Test Leads from Adapter Kit (VW
1594), connect DVOM to IAC valve terminals No. 1 and 2. IAC valve
resistance must be 10-20 ohms. If resistance is incorrect, replace IAC
valve.
IGNITION SYSTEM
NOTE: Ignition system testing information is not available
from manufacturer. These vehicles are equipped with a
distributorless ignition system.

I - SYSTEM/COMPONENT TESTS
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 09:11PM
IGNITION COIL
EMISSION SYSTEMS & SUB-SYSTEMS
NOTE: Other than EGR system, additional emission systems and
sub-system component testing information is not available
from manufacturer.
EXHAUST GAS RECIRCULATION (EGR)
Corrado SLC (2.8L)
1) Ensure engine coolant temperature is at least 122øF
(50
øC). Start engine and allow it to idle. Disconnect vacuum hose from
EGR valve. See Fig. 4. Connect hand-held vacuum pump to EGR valve and
apply vacuum.
2) Idle quality must noticeably deteriorate. If idle quality
does not change, check EGR valve and exhaust manifold for plugging.
Replace EGR valve if necessary. After repairs, erase DTC memory.Fig. 4: Testing EGR System (Corrado SLC)
Courtesy of Volkswagen United States, Inc.

I - SYSTEM/COMPONENT TESTS
Article Text (p. 7)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:11PM
END OF ARTICLE

INSTRUMENT PANEL
Article Text
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:12PM
ARTICLE BEGINNING
1993 ACCESSORIES & EQUIPMENT
Volkswagen Instrument Panel
Corrado SLC
DESCRIPTION & OPERATION
Instrument cluster for most models includes speedometer, fuel
gauge and temperature gauge. Optional instruments include clock,
tachometer, voltmeter and oil temperature gauge. See Figs. 3.
Printed circuit provides voltage to gauges. A voltage
regulator attached to printed circuit controls voltage to fuel and
temperature gauges. Most warning lights are a Light Emitting Diode
(LED). To replace diode, pull from printed circuit socket.
TESTING
VOLTAGE REGULATOR TEST
1) If only one gauge is inoperative, regulator is not
defective. Remove instrument cluster trim. Remove combination gauge.
Connect positive (+) lead of voltmeter between combination gauge
terminals No. 1 and 2. See Fig. 1. Turn ignition on. If battery
voltage is present, go to next step. If battery voltage is not
present, repair wiring harness or replace voltage regulator as
necessary.
2) Turn ignition off. Install combination gauge. Remove
speedometer. Connect positive (+) lead of voltmeter to terminal No 1
of voltage regulator. See Fig. 2. Connect voltmeter negative (-) lead
to terminal No. 2. Turn ignition on. Meter reading should be 9.5-10.5
volts. If voltage is incorrect, replace printed circuit or voltage
regulator.Fig. 1: Testing Combination Gauge (Corrado SLC)
Courtesy of Volkswagen United States, Inc.

INSTRUMENT PANEL
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 09:12PMFig. 2: Testing Voltage Regulator (Corrado SLC)
Courtesy of Volkswagen United States, Inc.
FUEL & TEMPERATURE GAUGE TEST
NOTE: Volkswagen Tester (VW 1301) is required for resistance
tests. Tester settings are numerical. Settings do not
indicate resistance in ohms. Manufacturer does not supply
resistance values in ohms.
1) Disconnect wire from fuel tank or temperature sending
unit. Connect VW Tester (VW 1301) 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 TESTING (1) TABLEÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication Dial Setting Indicator
Corrado SLC ................... 50 .......................... Full
160 ......................... Half
350 ........................ Empty
(1) - Information for EuroVan not available from manufacturer.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄTEMPERATURE GAUGE TESTING (1) TABLE
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication Dial Setting Indicator

INSTRUMENT PANEL
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 09:12PM
Corrado SLC ................... 80 ........................ Normal
50 ....................... (2) Hot
(1) - Information for EuroVan not available from manufacturer.
(2) - With Red LED flashing.ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ REMOVAL & INSTALLATION
CAUTION: DO NOT damage printed circuit when installing instruments.
INSTRUMENT CLUSTER
Removal & Installation
1) Obtain radio code. Disconnect negative battery cable.
Remove steering wheel only when removing complete instrument cluster
housing. Remove trim screw caps and screws located on lower part of
instrument cluster trim. Remove instrument cluster trim.
2) Remove trip odometer reset button. Remove trim cover
retaining screws. Remove trim cover from instrument cluster. Remove
instrument cluster housing retaining screws. Pull instrument cluster
from dash panel. Disconnect multi-point connector, MFI vacuum hose (if
equipped) and speedometer drive cable. Remove instrument cluster
housing.
NOTE: All components in instrument cluster, except for printed
circuit, can be removed from front, without removing
complete instrument cluster housing.
3) Disconnect speedometer cable, remove mounting screws and
pull speedometer from housing. Squeeze locating pins on other
instruments and pull from housing. To install, reverse removal
procedure.

INSTRUMENT PANEL
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 09:12PMFig. 3: Exploded View Of Instrument Cluster
Courtesy of Volkswagen United States, Inc.
PRINTED CIRCUIT CONNECTORS

INSTRUMENT PANEL
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 09:12PMFig. 4: Identifying Printed Circuit 28-Pin Connector
Courtesy of Volkswagen United States, Inc.