1993 VOLKSWAGEN CORRADO diagnostic menu
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1993 Volkswagen Corrado All Categories All Sections
Title List for Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:28PM* A/C-HEATER SYSTEM UNIFORM INSPECTION GUIDELINES ** ANTI-LOCK BRAKES UNIFORM INSPECTION GUIDELINE ** AUTO TRANS DIAGNOSIS MENU - VOLKSWAGEN* BRAKE SYSTEM UNIFORM INSPECTION GUIDELINES ** ELECTRICAL SYSTEM UNIFORM INSPECTION GUIDELINES ** ENGINE SYSTEMS UNIFORM INSPECTION GUIDELINES ** EXHAUST SYSTEM UNIFORM INSPECTION GUIDELINES ** STEERING UNIFORM INSPECTION GUIDELINES ** SUSPENSION UNIFORM INSPECTION GUIDELINES ** SYMPTOM CHECK LIST *2.8L IN-LINE V6 (VR6)A - ENGINE/VIN IDA/C COMPRESSOR OIL CHECKINGA/C COMPRESSOR SERVICINGA/C SYSTEM GENERAL DIAGNOSTIC PROCEDURESA/C SYSTEM GENERAL SERVICINGA/C-HEATER SYSTEM - MANUALAA - USING THIS SECTION (GENERAL HELP INFORMATION)ABBREVIATIONSALTERNATOR & REGULATORANTI-LOCK BRAKE SAFETY PRECAUTIONSANTI-LOCK BRAKE SYSTEMANTI-THEFT SYSTEMAXLE SHAFTSB - EMISSION APPLICATIONBRAKE SYSTEMC - SPECIFICATIONSCLUTCHCOMPUTER RELEARN PROCEDURESCRUISE CONTROL SYSTEMD - ADJUSTMENTSDEFOGGER - REAR WINDOWDOOR LOCKS - POWERE - THEORY/OPERATIONELECTRICAL COMPONENT LOCATORELECTROSTATIC DISCHARGE WARNING - BASIC INFORMATIONEMISSION CONTROL VISUAL INSPECTION PROCEDURESENGINE OVERHAUL PROCEDURES - GENERAL INFORMATIONF - BASIC TESTINGFAULTY RADIATOR FAN MOTOR COULD OVERHEAT & STALL ENGFUSES & CIRCUIT BREAKERSG - TESTS W/CODESGEAR TOOTH CONTACT PATTERNSGENERAL COOLING SYSTEM SERVICINGH - TESTS W/O CODES
Page 387 of 920
AA - USING THIS SECTION (GENERAL HELP INFORMATION)
Article Text
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:49PM
ARTICLE BEGINNING
ENGINE PERFORMANCE
How To Use This Section
INTRODUCTION
NOTE: Because there are so many possible combinations of
articles for the different manufacturers and models,
the new hyper-text capabilities built into this product
DO NOT apply to this article.
It is the purpose of this repair information system to help
professional automotive technicians maintain top vehicle performance
and correct driveability problems related to today's high tech
vehicles.
Because of the limited amount of space allowable for the this
product, our titles have been condensed to fit into the menus. An
alphabetical designation has been added to the front of each title to
allow the titles to be displayed in a way that reflects their
respective order of use. References to the titles in some of the
diagnostic flow charts sometimes will not correlate with the titles in
the this product menu. If not, refer to the MENU CROSS-REFERENCE table
below.
MENU CROSS-REFERENCE TABLEÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄTitle Associate Print (Book) Title:
A - ENGINE/VIN I D .................................... Introduction
B - EMISSION APPLICATION ..................... Emission Applications
C - TUNE-UP SPECS .............. Service & Adjustment Specifications
C - SPECIFICATIONS ............. Service & Adjustment Specifications
D - ADJUSTMENTS ............................. On-Vehicle Adjustments
E - THEORY/OPERATION ............................ Theory & Operation
F - BASIC TESTING ...................... Basic Diagnostic Procedures
G - TESTS W/ CODES ................................ Self-Diagnostics
H - TESTS W/O CODES .................... Trouble Shooting - No Codes
I - SYS/COMP TESTS ..................... Systems & Component Testing
J - PIN VOLTAGE CHARTS .......................... Pin Voltage Charts
K - SENSOR RANGE CHARTS .............. Sensor Operating Range Charts
L - WIRING DIAGRAMS ................................ Wiring Diagrams
M - VACUUM DIAGRAMS ................................ Vacuum Diagrams
N - REMOVE/INSTALL/OHAUL .......... Removal, Overhaul & Installation
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ Because of this we recommend that you read the rest of these
INTRODUCTION paragraphs to better understand why the information is
presented in this new format.
The A - ENGINE/VIN I D article will help you identify the
vehicle and its systems. It will also explain the VIN code and in many
cases, show its location.
Page 597 of 920
H - TESTS W/O CODES
Article Text
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:11PM
ARTICLE BEGINNING
1993 ENGINE PERFORMANCE
Volkswagen Trouble Shooting - No Codes
Cabriolet, Corrado SLC, EuroVan, Fox
Golf, GTI, Jetta, Passat GL, Passat GLX
INTRODUCTION
PRELIMINARY INFORMATION
Before diagnosing symptoms or intermittent faults, perform
steps in the F - BASIC TESTING article in this section. Use this
article to diagnose driveability problems existing when a hard fault
code is not present or vehicle is not equipped with a self-diagnostic
system.
NOTE: Some driveability problems may have been corrected by
manufacturer with a revised computer calibration chip or
computer control unit. Check with manufacturer for latest
chip or computer application.
Symptom checks can direct the technician to malfunctioning
component(s) for further diagnosis. A symptom should lead to a
specific component, system test or an adjustment.
Use intermittent test procedures to locate driveability
problems that DO NOT occur when the vehicle is being tested. These
test procedures should also be used if a soft (intermittent) trouble
code was present, but no problem was found during self-diagnostic
testing.
NOTE: For specific test procedures, see the I - SYS/COMP TESTS
article in this section. For adjustment procedures, see the
appropriate D - ADJUSTMENTS article. For Engine Performance
related specifications, see appropriate C - SPECIFICATIONS
article in this section. See the following menus:
C - SPECIFICATIONS ARTICLES MENU
NOTE: For the appropriate C - SPECIFICATIONS article, go to:
* For Cabriolet, see: C - SPECIFICATIONS
* For Corrado SLC, see: C - SPECIFICATIONS
* For EuroVan, see: C - SPECIFICATIONS
* For Fox, see: C - SPECIFICATIONS
* For Golf, GTI, Jetta, see: C - SPECIFICATIONS
* For Passat, see: C - SPECIFICATIONS
D - ADJUSTMENTS ARTICLES MENU
NOTE: For the appropriate D - ADJUSTMENTS article, go to:
Page 598 of 920
H - TESTS W/O CODES
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 09:11PM
* For Cabriolet, see: D - ADJUSTMENTS
* For Corrado SLC, see: D - ADJUSTMENTS
* For EuroVan, see: D - ADJUSTMENTS
* For Fox, see: D - ADJUSTMENTS
* For Golf, GTI, Jetta, see: D - ADJUSTMENTS
* For Passat GL 2.0L 4-Cylinder, see: D - ADJUSTMENTS - 4-CYL
* For Passat GLX 2.8L VR6, see: D - ADJUSTMENTS - VR6
I - SYS/COMP TESTS ARTICLES MENU
NOTE: For the appropriate I - SYS/COMP TESTS article, go to:
* For Cabriolet, see: I - SYSTEM/COMPONENT TESTS
* For Corrado SLC, see: I - SYSTEM/COMPONENT TESTS
* For EuroVan, see: I - SYSTEM/COMPONENT TESTS
* For Fox, see: I - SYSTEM/COMPONENT TESTS
* For Golf, GTI, Jetta, see: I - SYSTEM/COMPONENT TESTS
* For Passat GL 2.0L 4-Cylinder, see:
I - SYSTEM/COMPONENT TESTS - 4-CYL
* For Passat GLX 2.8L VR6, see:
I - SYSTEM/COMPONENT TESTS - VR6
SYMPTOMS
SYMPTOM DIAGNOSIS
Symptom checks cannot be used properly unless the problem is
actually happening while the vehicle is being tested. To reduce
diagnostic time, ensure battery voltage is okay and starter motor
turns engine over before attempting to diagnose a symptom.
Check engine mechanical condition (compression pressure,
valve timing, etc.), wiring harness and connections (terminals not
corroded or pushed back), and vacuum hose (not disconnected or
leaking).
Also check for correct tire sizes, as recommended by
manufacturer. Ensure wheels rotate freely (brake drag or bad wheel
bearings). Ensure no speed reducing accessories are installed.
Symptoms available for diagnosis include the following.
* Engine Does Not Start Or Is Difficult To Start When Cold
* Engine Does Not Start Or Is Difficult To Start When Warm
* Uneven Idle Or No Idle With Cold Engine Or During Warm-Up
* Engine Starts But Stalls
* Idle Speed Exceeds Specification
* Poor Acceleration With Cold Engine Or During Warm-Up
* Engine Stalls While Driving
* Poor Performance
* Engine Run-On (Dieseling)
* High Fuel Consumption
* Engine Knock
* Engine Runs Unevenly Over Entire Speed Range
Page 602 of 920
H - TESTS W/O CODES
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
* Check full throttle switch.
* Check ignition timing.
ENGINE RUNS UNEVENLY OVER ENTIRE SPEED RANGE
* Check auxiliary air intake system.
* Check injector fuel pressure and volume.
* Check ignition timing, spark plugs, distributor, secondary
ignition wiring and coil.
INTERMITTENTS
INTERMITTENT PROBLEM DIAGNOSIS
Intermittent fault testing requires duplicating circuit or
component failure to identify the problem. These procedures may lead
to the computer setting a fault code (on some systems) which may help
in diagnosis.
If problem vehicle does not produce fault codes, monitor
voltage or resistance values using a DVOM while attempting to
reproduce conditions causing intermittent fault. A status change on
DVOM indicates a fault has been located.
Use a DVOM to pinpoint faults. When monitoring voltage,
ensure ignition switch is in ON position or engine is running. Ensure
ignition switch is in OFF position or negative battery cable is
disconnected when monitoring circuit resistance. Status changes on
DVOM during test procedures indicate area of fault.
TEST PROCEDURES
Intermittent Simulation
To reproduce the conditions creating an intermittent fault,
use the following methods:
* Lightly vibrate component.
* Heat component.
* Wiggle or bend wiring harness.
* Spray component with water.
* Remove/apply vacuum source.
Monitor circuit/component voltage or resistance while
simulating intermittent. If engine is running, monitor for self-
diagnostic codes. Use the test results to identify a faulty component
or circuit. For system or component testing refer to the appropriate
I - SYS/COMP TESTS article in this section. See the menu below:
* For Cabriolet, see: I - SYSTEM/COMPONENT TESTS
* For Corrado SLC, see: I - SYSTEM/COMPONENT TESTS
* For EuroVan, see: I - SYSTEM/COMPONENT TESTS
* For Fox, see: I - SYSTEM/COMPONENT TESTS
* For Golf, GTI, Jetta, see: I - SYSTEM/COMPONENT TESTS
* For Passat GL 2.0L 4-Cylinder, see:
Page 907 of 920
WIRING DIAGRAMS
Article Text
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:28PM
ARTICLE BEGINNING
1993 WIRING DIAGRAMS
Volkswagen Wiring Diagrams
Volkswagen; Corrado
COMPONENT LOCATION MENU
COMPONENT LOCATIONS TABLEÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Figure No. (Location)
A/C COMPRESSOR CLUTCH ................................. 7 (C 3)
A/C PRESSER SWITCH .................................... 1 (C 1)
A/C SWITCH ........................................ 6 (E 20
Ä21)
ABS CONTROL UNIT .................................. 4 (B 12-14)
ABS DIAGNOSTIC CONNECTOR ............................. 4 (D 15)
ABS HYDRAULIC PUMP FUSE .............................. 4 (E 15)
ABS VALVE FUSE ....................................... 4 (A 12)
ABS WARNING SWITCHES ................................. 4 (B 15)
ALTERNATOR ............................................ 1 (B 3)
ANTI-THEFT ALARM CONTROL UNIT ......................... 3 (E 8)
BACK-UP LIGHT SWITCH ........................... 9,10 (E 32
Ä39)
BATTERY ............................................... 1 (A 2)
BEAM SELECT SWITCH ................................... 6 (A 20)
BRAKE FLUID LEVEL SWITCH ............................. 8 (A 31)
CENTRAL LOCK CONTROL UNIT ........................... 10 (A 39)
CIGARETTE LIGHTER AND LIGHT .......................... 7 (A 24)
COOLANT FAN CONTROL/COOLANT TEMPERATURE SENDER UNIT ... 1 (D 1)
COOLANT TEMPERATURE SENDER (EXCEPT SLC) .............. 8 (A 29)
CRUISE CONTROL UNIT ............................... 4 (A 12
Ä15)
DEFOGGER SWITCH ...................................... 8 (E 29)
DIRECTIONAL HAZARD SWITCH ............................ 6 (A 21)
DOOR SWITCHES ....................................... 10 (B 38)
ENGINE CONTROL MODULE (ECM)(SLC) .................... 2 (A
ÄE 7)
FOG LIGHT SWITCH ..................................... 6 (A 23)
FRESH AIR SWITCH ............................. 6,9 (E 22, E 32)
FRESH AIR SWITCH ILLUMINATION LIGHT .................. 6 (D 20)
FUEL INJECTORS ........................................ 2 (D 4)
FUEL TANK SENDER ..................................... 5 (E 18)
FUSE #23 ............................................. 6 (D 20)
FUSE #51 ............................................. 9 (D 34)
FUSE/RELAY PANEL ............................... 5,8 (C 16, 31)
FUSE/RELAY PANEL LAYOUT ...................... 10 (D, E 37, 39)
GLOVE COMPARTMENT LIGHT .......................... 9 (D 30, 31)
HYDRAULIC PUMP RELAY ............................... 5 (D-E 15)
HYDRAULIC UNIT .................................... 5 (E 17
Ä15)
IGNITION COIL ......................................... 2 (E 6)
IGNITION SWITCH ...................................... 5 (A 16)
INSTRUMENT CLUSTER .............................. 9 (A
ÄD 32Ä34)
INTERIOR LIGHT SWITCH ............................... 11 (E 41)