VOLKSWAGEN CORRADO 1990 Repair Manual

WAVEFORMS - INJECTOR PATTERN TUTORIAL
Article Text (p. 27)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:53PMFig. 20: Injector Bank - Known Good - Voltage Pattern
EXAMPLE #3 - VOLTAGE CONTROLLED DRIVER
This known-good waveform pattern, Fig. 21, is from a GM 5.0L
V8 TPI VIN [F]. It was taken during hot idle, closed loop and no load.

WAVEFORMS - INJECTOR PATTERN TUTORIAL
Article Text (p. 28)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:53PMFig. 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)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:53PMFig. 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.

WAVEFORMS - INJECTOR PATTERN TUTORIAL
Article Text (p. 30)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:53PMFig. 23: Injector Bank - Known Good - Voltage Pattern

WAVEFORMS - INJECTOR PATTERN TUTORIAL
Article Text (p. 31)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:53PMFig. 24: Injector Bank - Known Good - Voltage Pattern
EXAMPLE #6 - CURRENT CONTROLLED DRIVER
This known-good pattern from a Ford 3.0L V6 PFI VIN [U]
illustrates that a zener diode inside the computer is used to clamp
the injector's inductive kick to 35-volts on this system. See Fig. 25.

WAVEFORMS - INJECTOR PATTERN TUTORIAL
Article Text (p. 32)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:53PMFig. 25: Injector Bank - Known Good - Voltage Pattern
EXAMPLE #7 - CURRENT CONTROLLED DRIVER
This known-good waveform from a Ford 5.0L V8 CFI VIN [F] was
taken during hot idle, closed loop, and no load. See Fig. 26.

WAVEFORMS - INJECTOR PATTERN TUTORIAL
Article Text (p. 33)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:53PMFig. 26: Single Injector - Known Good - Voltage Pattern
EXAMPLE #8 - CURRENT CONTROLLED DRIVER
These two known-good waveform patterns are from a GM 2.0L In-
Line 4 VIN [1]. Fig. 27 illustrates the 78 volt inductive spike that
indicates a zener diode is not used. The second waveform, Fig. 28, was
taken during hot idle, closed loop, and no load.

WAVEFORMS - INJECTOR PATTERN TUTORIAL
Article Text (p. 34)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:53PMFig. 27: Single Injector - Known Good - Voltage Pattern

WAVEFORMS - INJECTOR PATTERN TUTORIAL
Article Text (p. 35)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:53PMFig. 28: Single Injector - Known Good - Voltage Pattern
END OF ARTICLE

WHEEL ALIGNMENT SPECIFICATIONS & PROCEDURES
Article Text
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:53PM
ARTICLE BEGINNING
1990-91 WHEEL ALIGNMENT
Specifications & Procedures
1990-91 Passat
1991 Cabriolet, Corrado, Fox, Golf, GTI, Jetta, Vanagon
PRE-ALIGNMENT INSTRUCTIONS
NOTE: Prior to performing wheel alignment, perform preliminary
visual and mechanical inspection of wheels, tires and
suspension components. See ALIGNMENT THEORY/OPERATION in
the WHEEL ALIGNMENT Section.
RIDING HEIGHT ADJUSTMENT
NOTE: On vehicles with electronic chassis controls, all systems
should be functional before attempting riding height or
wheel alignment adjustment.
Before adjusting alignment, ensure difference in riding
height between left and right sides of vehicle is less than 1" (25.4
mm). Riding height must be checked with vehicle on level floor and
tires properly inflated. Bounce vehicle several times and allow
suspension to settle.
Visually inspect vehicle for signs of abnormal height from
front to rear or side to side. Check passenger and luggage
compartments for extra heavy items and remove if present. If
difference in riding height between left and right sides of vehicle is
NOT less than 1" (25.4 mm), check suspension components and repair or
replace as necessary.
WHEEL ALIGNMENT SPECIFICATIONS
WHEEL ALIGNMENT SPECIFICATIONS TABLEÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication Preferred Range
Cabriolet
Camber (1)
Front ................ 5/16 ............... -3/16 To 13/16
Rear ................ -1 1/4 .......... -1 13/16 To -11/16
Caster (1) ........... 1 3/16 ............ 1 5/16 To 2 5/16
Toe-In (2)
Front .......... -1/8 (-3) .. -3/16 To -1/16 (-4.5 To-1.5)
Rear ............ 5/32 (4) ........ 1/32 To 9/32 (1 To 7)
Toe-In (1)
Front ................ -1/4 ................. -3/8 To -1/8
Rear ................. 5/16 ................. 1/16 To 9/16
Toe-Out On Turns (1)