1990 VOLKSWAGEN CORRADO engine

AA - USING THIS SECTION (GENERAL HELP INFORMATION)
Article Text (p. 2)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:41PM
If you want "TUNE-UP" type information, see D - ADJUSTMENTS
for the adjustment procedures. If you are familiar with the
procedures, but need a quick way to find the specification, go to C -
TUNE-UP SPECS or C - SPECIFICATIONS for the specifications pertaining
to the vehicle.
When diagnosing driveability problems, first go to F - BASIC
TESTING. This article is here to help eliminate wasted diagnostic
time. If the basic systems are working properly, go to G - TESTS W/
CODES.
If the vehicle still is having a driveability problem or if
the vehicle has no self-diagnostic system, go to H - TESTS W/O CODES.
This article will help you diagnose the problem by symptom, locate the
symptom exhibited by the vehicle, and inspect or test the items which
may be causing the problem.
After finding which specific system or component requires
testing, use the I - SYS/COMP TESTS article to tests the systems and
components. We have also included (when available) pin voltage charts
and sensor range charts. These can be found in J - PIN VOLTAGE CHARTS
and K - SENSOR RANGE CHARTS.
Also included in this section are wiring diagrams and vacuum
diagrams. These can be found in L - WIRING DIAGRAMS and M - VACUUM
DIAGRAMS.
When all diagnostic tests have been performed and the problem
has been discovered, it may be necessary to replace or overhaul the
defective part. This information can be found in
N - REMOVE/INSTALL/OHAUL.
The content of each of these articles is outlined below. As a
summary of the driveability diagnosis, see ROUTINE OUTLINE in this
article.
A - ENGINE/VIN ID
This article shows how to identify the model and engine by
its Vehicle Identification Number (VIN). A model coverage chart shows
each model and engine, the fuel system, ignition system and engine
code. The engine serial number locations are also included in this
article.
B - EMISSION APPLICATION
These charts identify the emission systems and sub-systems
applicable to each model and engine combination.
C - TUNE-UP SPECS
This is a collection of quick-reference type specifications.
This article is helpful when you are familiar with proper adjustment
procedures and only need specifications. Included in this section are:
* Battery specifications.
* Fluid capacities.

AA - USING THIS SECTION (GENERAL HELP INFORMATION)
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
* Replacement intervals.
* Belt adjustment.
* Engine Compression.
* Valve clearance.
* Valve Arrangement.
* Ignition coil specifications.
* High tension wire resistance.
* Spark plug type and gap.
* Firing order.
* Ignition timing.
* Fuel pump performance and injector resistance specifications
* Slow and fast idle speed and mixture specifications.
* Carbon monoxide (CO) level specifications.
* Throttle position sensor/switch specifications.
C - SPECIFICATIONS
This is a collection of quick-reference type specifications.
This article is helpful when you are familiar with proper adjustment
procedures and only need specifications. Included in this section are:
* Battery specifications.
* Fluid capacities.
* Replacement intervals.
* Belt adjustment.
* Engine Compression.
* Valve clearance.
* Valve Arrangement.
* Ignition coil specifications.
* High tension wire resistance.
* Spark plug type and gap.
* Firing order.
* Ignition timing.
* Fuel pump performance and injector resistance specifications
* Slow and fast idle speed and mixture specifications.
* Carbon monoxide (CO) level specifications.
* Throttle position sensor/switch specifications.
D - ADJUSTMENTS
This article contains the information that use to be included
in the TUNE-UP section. Checking and adjusting valves, spark plugs,
spark plug wires, base ignition timing and idle speed are found in
this section. Use this article for routine maintenance. Also, if you
have a driveability problem, ensure all on-vehicle adjustments are
correct before proceeding with any diagnosis.
E - THEORY/OPERATION

AA - USING THIS SECTION (GENERAL HELP INFORMATION)
Article Text (p. 4)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:41PM
This article covers basic theory and operation of engine
performance-related systems and components. Before diagnosing vehicles
or systems with which you are not completely familiar, read this
article.
F - BASIC TESTING
When diagnosing driveability problems, there are certain
"BASIC DIAGNOSTIC PROCEDURES" which must FIRST be performed. It is
necessary to perform a careful, complete check of basic engine
mechanical and electrical conditions, and verify spark availability
and adequate fuel supply.
The procedures apply to both computerized and non-
computerized systems. If all systems are okay, go to G - TESTS W/
CODES for vehicles with self-diagnostic systems or H - TESTS W/O CODES
for diagnosis by symptom.
G - TESTS W/ CODES
Use this article to retrieve and interpret trouble codes from
the engine computer self-diagnostic system. Once information is
retrieved, diagnostic procedures are given to help pinpoint and repair
computer system/component faults. Necessary steps for clearing trouble
codes are also given. If faults indicated by trouble codes are not
present at time of testing, proceed to TESTS W/O CODES for
intermittent testing procedures.
H - TESTS W/O CODES
This article helps trouble shoot driveability problems based
upon available "SYMPTOMS" and "INTERMITTENT TESTING" procedures.
Procedures in this section should lead you to specific component or
system tests which may or may not be computer monitored/controlled.
I - SYS/COMP TESTS
In this article, you will find tests for systems and
components related to air induction systems (turbochargers), fuel
control, ignition control, and emissions control systems.
J - PIN VOLTAGE CHARTS
PIN VOLTAGE CHARTS are supplied (where available) to speed up
the diagnostic process. By checking pin voltages at the electronic
control unit, it is possible to determine if the control unit is
receiving and transmitting proper voltage signals.
K - SENSOR RANGE CHARTS
Use the SENSOR OPERATING RANGE CHARTS to determine if a

AA - USING THIS SECTION (GENERAL HELP INFORMATION)
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
sensor is out of calibration. A sensor that is out of calibration may
not set a trouble code, but it will cause driveability problems.
L - WIRING DIAGRAMS
Use these WIRING DIAGRAMS to identify and trace component
circuits, locate shorts and opens in circuits, and understand how
individual circuits function as part of a system. The diagrams in this
article are only for fuel, ignition and emission systems
M - VACUUM DIAGRAMS
The VACUUM DIAGRAMS will assist you in finding incorrectly
routed vacuum hoses which may cause driveability problems or computer
indicated malfunctions.
N - REMOVE/INSTALL/OHAUL
N - REMOVE/INSTALL/OHAUL contains information found in the
sub-headings of REMOVAL, OVERHAUL & INSTALLATION. These are procedures
and specifications required to remove, overhaul (if possible) and
install components related to engine performance.
WHERE TO START
PERFORM BASIC INSPECTION
1) Verify customer complaint.
2) Perform visual inspection. See F - BASIC TESTING.
3) Test engine sub-system to determine that the following
systems are functioning properly. See F- BASIC TESTING.
* Mechanical conditions (compression)
* Ignition output
* Fuel Delivery
4) Check air induction system for leaks.
5) Check & adjust basic engine settings listed below to
ensure they are to specification. See D - ADJUSTMENTS.
* Ignition timing
* Idle speed
CHECK FOR TROUBLE CODES
1) If equipped with self-diagnostics, check for trouble
codes. Refer to G - TESTS W/ CODES.
2) Repair causes of trouble code(s).
3) Clear control unit memory.
SYMPTOM DIAGNOSIS

AA - USING THIS SECTION (GENERAL HELP INFORMATION)
Article Text (p. 6)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:41PM
1) If no self-diagnostics available, or no trouble codes
present, identify symptom.
2) See trouble shooting procedure to repair complaint. See H
- TESTS W/O CODES
TEST SYSTEM
1) Perform necessary systems and component tests. See I -
SYS/COMP TESTS.
2) Verify that complaint is repaired.
SAFETY PRECAUTIONS
* Always refer to Engine Tune-Up Decal in engine compartment before
performing tune-up. If manual and decal differ, always use decal
specifications.
* DO NOT allow or create a condition of misfire in more than one
cylinder for an extended period of time. Damage to converter may
occur due to loading converter with unburned air/fuel mixture.
* Always turn ignition off and disconnect negative battery cable
BEFORE disconnecting or connecting computer or other electrical
components.
* DO NOT drop or shock electrical components such as computer,
airflow meter, etc.
* DO NOT use fuel system cleaning compounds that are not
recommended by the manufacturer. Damage to gaskets, diaphragm
materials and catalytic converter may result.
* Before performing a compression test or cranking engine using a
remote starter switch, disconnect coil wire from distributor and
secure it to a good engine ground, or disable ignition.
* Before disconnecting any fuel system component, ensure fuel
system pressure is released.
* Use a shop towel to absorb any spilled fuel to prevent fire.
* DO NOT create sparks or have an open flame near battery.
* If any EFI components such as hoses or clamps are replaces,
ensure they are replaced with components designed for EFI use.
* Always reassemble throttle body components with new gaskets, "O"
rings and seals.
* If equipped with an inertia switch, DO NOT reset switch until
fuel system has been inspected for leaks.
* Wear safety goggles when drilling or grinding.
* Wear proper clothing which protects against chemicals and other
hazards.
END OF ARTICLE

ABBREVIATIONS
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 09:42PM³CBVV ³Carburetor Bowl Vent Valve ³
³cc
³Cubic Centimeter ³
³CCC
³Computer Command Control ³
³CCD
³Computer Controlled Dwell ³
³CCM
³Central Control Module ³
³CCO
³Converter Clutch Override ³
³CCOT
³Cycling Clutch Orifice Tube ³
³CCW
³Counterclockwise ³
³CDI
³Capacitor Discharge Ignition ³
³CEC
³Computerized Engine Control ³
³CFI
³Central Fuel Injection ³
³CID
³Cubic Inch Displacement ³
³CID
³Cylinder Identification sensor ³
³CIS
³Continuous Injection System ³
³CIS-E
³Continuous Injection System-Electronic ³
³CKT
³Circuit ³
³CLR
³Clear ³
³CNG
³Compressed Natural Gas ³
³CO
³Carbon Monoxide ³
³CO2
³Carbon Dioxide ³
³CONV
³Convertible ³
³CP
³Canister Purge ³
³CPA
³Connector Position Assurance ³
³CPS
³Crank Position Sensor ³
³CTS
³Coolant Temperature Sensor ³
³CV
³Check Valve or Constant Velocity ³
³CVC
³Constant Vacuum Control ³
³CW
³Clockwise ³
³CYL or Cyl.
³Cylinder ³
³Calif.
³California ³
³Carb.
³Carburetor ³
³Chrg.
³Charging ³
³Circ.
³Circuit ³
³Cntrl.
³Control ³
³Comp.
³Compressor or Compartment ³
³Conn.
³Connector ³
³Cont.
³Continued ³
³Conv.
³Convertible or Converter ³
³Cu. In.
³Cubic Inch ³
³Cyl.
³Cylinder ³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ "D" ABBREVIATION TABLE
"D" ABBREVIATION TABLE
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³ABBREVIATION
³DEFINITION ³
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³"D"
³Drive ³
³DBC
³Dual Bed Catalyst ³
³DC
³Direct Current or Discharge ³
³DDD
³Dual Diaphragm Distributor ³

ABBREVIATIONS
Article Text (p. 4)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:42PM³DERM ³Diagnostic Energy Reserve Module ³
³DFI
³Digital Fuel Injection ³
³DIC
³Driver Information Center ³
³DIS
³Direct Ignition System ³
³DIS
³Distributorless Ignition System ³
³DIST
³Distribution ³
³DISTR
³Distributor ³
³DK BLU
³Dark Blue ³
³DK GRN
³Dark Green ³
³DME
³Digital Motor Electronics (Motronic System) ³
³DOHC
³Double Overhead Cam ³
³DOT
³Department of Transportation ³
³DP
³Dashpot ³
³DRB-II
³Diagnostic Readout Box ³
³DVOM
³Digital Volt/Ohm Meter (see VOM) ³
³Def.
³Defogger or Defroster ³
³Def.
³Defrost ³
³Defog.
³Defogger ³
³Diag.
³Diagnostic ³
³Dist.
³Distributor or Distribution ³
³Dr.
³Door ³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ "E" ABBREVIATION TABLE
"E" ABBREVIATION TABLE
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³ABBREVIATION
³DEFINITION ³
ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³EAC
³Electric Assist Choke ³
³EACV
³Electric Air Control Valve ³
³EBCM
³Electronic Brake Control Module ³
³ECA
³Electronic Control Assembly ³
³ECAT
³Electronically Controlled Automatic Transaxle ³
³ECM
³Electronic Control Module ³
³ECT
³Engine Coolant Temperature Sensor ³
³ECU
³Electronic Control Unit or Engine Control Unit ³
³EDF
³Electric Drive Fan relay assembly ³
³EDIS
³Electronic Distributorless Ignition System ³
³EEC
³Electronic Engine Control ³
³EECS
³Evaporative Emission Control System ³
³EEPROM
³Electronically Erasable PROM ³
³EFE
³Early Fuel Evaporation ³
³EFI
³Electronic Fuel Injection ³
³EGO
³Exhaust Gas Oxygen sensor (see HEGO) ³
³EGR
³Exhaust Gas Recirculation system ³
³EGRC
³EGR Control solenoid or system ³
³EGRV
³EGR Vent solenoid or system ³
³EMR
³Emission Maintenance Reminder Module ³
³ESA
³Electronic Spark Advance ³
³ESC
³Electronic Spark Control ³
³EST
³Electronic Spark Timing ³

ABBREVIATIONS
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 09:42PM³ETR ³Emergency Tensioning Retractor ³
³EVAP
³Fuel Evaporative System ³
³EVIC
³Electronic Vehicle Information Center ³
³EVO
³Electronic Variable Orifice ³
³EVP
³EGR Valve Position Sensor ³
³EVR
³EGR Valve Regulator ³
³EVRV
³Electronic Vacuum Regulator Valve ³
³Elect.
³Electronic ³
³Eng.
³Engine ³
³Evap.
³Evaporative ³
³Exc.
³Except ³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ "F" ABBREVIATION TABLE
"F" ABBREVIATION TABLE
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³ABBREVIATION
³DEFINITION ³
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³ø F
³Fahrenheit (Degrees) ³
³F/B
³Fuse Block ³
³FBC
³Feedback Carburetor ³
³FI
³Fuel Injector or Fuel Injection ³
³FICD
³Fast Idle Control Device ³
³FIPL
³Fuel Injector Pump Lever ³
³FP
³Fuel Pump ³
³FPM
³Fuel Pump Monitor ³
³FPR-VSV
³Fuel Pressure Regulator Vacuum Switching Valve ³
³FWD
³Front Wheel Drive ³
³Fed.
³Federal ³
³Ft. Lbs.
³Foot Pounds ³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ "G" ABBREVIATION TABLE
"G" ABBREVIATION TABLE
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³ABBREVIATION
³DEFINITION ³
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³g
³grams ³
³GND or GRND
³Ground ³
³GRN
³Green ³
³GRY
³Gray ³
³Ga.
³Gauge ³
³Gals.
³gallons ³
³Gov.
³Governor ³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ "H" ABBREVIATION TABLE
"H" ABBREVIATION TABLE