engine VOLKSWAGEN CORRADO 1993 Repair Manual

WAVEFORMS - INJECTOR PATTERN TUTORIAL
Article Text (p. 23)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:26PM
The next waveform is from the same type of engine, except
that it shows a faulty injector. See Fig. 16. Notice that the current
went to almost 5 amps and stayed at 1 amp during the hold pattern.
Excessive amounts of current flow from bad injectors are a common
source of intermittent computer shutdown. Using a current waveform
pattern is the most accurate method of pinpointing this problem.Fig. 15: Single Injector w/Normal Current Flow - Current PatternFig. 16: Single Injector w/Excessive Current Flow - Current Pattern
EXAMPLE #8 - CURRENT CONTROLLED DRIVER
This known-good CPI system waveform from a GM 4.3L V6 CPI VIN
[W] peaks at 4 amps and holds at 1-amp. See Fig. 17 for waveform.

WAVEFORMS - INJECTOR PATTERN TUTORIAL
Article Text (p. 24)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:26PMFig. 17: Single Injector w/Normal Current Flow - Current Pattern
VOLTAGE WAVEFORM SAMPLES
EXAMPLE #1 - VOLTAGE CONTROLLED DRIVER
These two known-good waveform patterns are from a Ford 4.6L
V8 VIN [W]. Fig. 18 illustrates the 64 volt inductive kick on this
engine, indicating no clamping is occurring. The second pattern,
Fig. 19, was taken during hot idle, closed loop, and no load.

WAVEFORMS - INJECTOR PATTERN TUTORIAL
Article Text (p. 28)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:26PMFig. 21: Injector Bank - Known Good - Voltage Pattern
EXAMPLE #4 - CURRENT CONTROLLED DRIVER
From 1984 to 1987, Chrysler used this type injector drive on
their TBI-equipped engines. See Fig. 22 for a known-good pattern.
Instead of the ground side controlling the injector, Chrysler
permanently grounds out the injector and switches the power feed side.
Most systems do not work this way.
These injectors peak at 6 amps of current flow and hold at 1
amp.

WAVEFORMS - INJECTOR PATTERN TUTORIAL
Article Text (p. 29)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:26PMFig. 22: Single Injector - Known Good - Voltage Pattern
EXAMPLE #5 - CURRENT CONTROLLED DRIVER
These two known-good waveform patterns are from a Chrysler 3.
0L V6 VIN [3]. The first waveform, Fig. 23, is a dual trace pattern
that illustrates how Chrysler uses the rising edge of the engine speed
signal to trigger the injectors. The second waveform, Fig. 24, was
taken during hot idle, closed loop, and no load.

WIRING DIAGRAM SYMBOLS
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 09:27PM
been created to make locating components easier. For these
articles, there will be a COMPONENT LOCATION MENU title in
the article main menu. These articles will also have the
original legend available on the first graphic.Fig. 1: Identifying Tie-Off Symbols
4) If the wires are not drawn all the way to another
component (across several pages), a reference will tell you their
final destination.
5) Again, use the legend on the first page of the wiring
diagram to determine the grid number and letter of the referenced
component. You can then turn directly to it without tracing wires
across several pages.
6) The symbols shown in Fig. 1 are called tie-offs. The first
tie-off shown indicates that the circuit goes to the temperature
sensor, and is also a ground circuit.
7) The second symbol indicates that the circuit goes to a
battery positive parallel circuit. The third symbol leads to a
particular component and the location is also given.
8) The lines shown in Fig. 2 are called options. Which path
or option to take depends on what engine or systems the vehicle has.Fig. 2: Identifying Option Symbols
COLOR ABBREVIATIONS IDENTIFICATION
COLOR ABBREVIATIONSÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄColor Normal Optional
Black .................. BLK ................... BK

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)

WIRING DIAGRAMS
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 09:28PMFig. 1: Engine Compartment, Headlights (Grid 1-3)

WIRING DIAGRAMS
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 09:28PMFig. 2: Engine Control Module V6, Ignition Coil (Grid 4-7)

WIRING HARNESS CHAFING MAY CAUSE ENGINE STALL
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
NHTSA RECALL BULLETIN
Model(s): 1992 Volkswagen Corrado
1993 Volkswagen Corrado
Campaign No: 93V102000
Number of Affected Vehicles: 4300
Beginning Date of Manufacture: 1991 AUG
Ending Date of Manufacture: 1992 NOV
VEHICLE DESCRIPTION:
Passenger cars equipped with a VR6 engine.
DESCRIPTION OF DEFECT:
An engine compartment electrical wiring harness may have been routed
too close to a sheet metal edge. The wiring can become damaged during
normal vehicle operation due to chafing, resulting in an electrical
short.
FAULT:
Chafes, Excessive wear, Scored
SYSTEM:
Electrical system.
CONSEQUENCE OF DEFECT:
If a short occurs, either the engine could stall or the radiator fan
could stop operating causing the engine to overheat. Either condition
could result in a vehicle accident.
CORRECTIVE ACTION:
Reroute and secure various wiring harnesses inside the engine
compartment.
ADDITIONAL INFORMATION:
The National Highway Traffic Safety Administration operates Monday
through Friday from 8:00 AM to 4:00 PM, Eastern Time. For more
information call (800) 424-9393 or (202) 366-0123. For the hearing
impaired, call (800) 424-9153.
END OF ARTICLE