engine VOLKSWAGEN CORRADO 1993 Repair Manual

F - BASIC TESTING
Article Text (p. 11)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:10PM
is 176øF (80øC) and Blue engine coolant temperature
sensor is disconnected.
(2) - Ignition timing is computer controlled. Information
is not available from manufacturer.
(3) - Using Scan Tester (VAG 1551) in START BASIC SETTING
mode. Ignition timing is not adjustable.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄIGNITION TIMING ADVANCE (Degrees BTDC @ RPM)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication Specification
Cabriolet
Digifant I (California) .......... (1) 27-33 @ 4500
Digifant II (Other 49 States) .... (1) 20-30 @ 2300
Fox
Digifant I (California) .......... (1) 27-33 @ 4500
Digifant II (Other 49 States) .... (1) 20-30 @ 2300
All Other Models ................................ (2)
(1) - With Blue engine coolant temperature sensor
connected. Specification is in addition to the
initial setting.
(2) - Ignition timing advance is computer controlled.
Information is not available from manufacturer.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ SUMMARY
If no faults were found while performing the tests in this
article, see H - TESTS W/O CODES article in this section for diagnosis
by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent
diagnostic procedures.
END OF ARTICLE

FAULTY RADIATOR FAN MOTOR COULD OVERHEAT & STALL ENG
Article Text
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:10PM
ARTICLE BEGINNING
NHTSA RECALL BULLETIN
Model(s): 1993 Volkswagen Corrado
1993 Volkswagen Golf III
1993 Volkswagen Jetta III
1993 Volkswagen Passat
1994 Volkswagen Corrado
1994 Volkswagen Golf III
1994 Volkswagen Jetta III
1994 Volkswagen Passat
1995 Volkswagen Golf III
1995 Volkswagen Jetta III
1995 Volkswagen Passat
Campaign No: 95V178000
Number of Affected Vehicles: 34000
Beginning Date of Manufacture: 1993 APR
Ending Date of Manufacture: 1995 FEB
VEHICLE DESCRIPTION:
Passenger vehicles equipped with VR6 engines.
SYSTEM:
Engine cooling system; fan.
FAULT:
Broken, Shattered, Cracked, Split, Collapse
DESCRIPTION OF DEFECT:
Improper material was used in manufacturing the radiator fan motor
shaft causing the shaft to wear and become noisy.
CONSEQUENCE OF DEFECT:
A worn and noisy fan motor shaft can seize rendering the fan motor
inoperative, eventually causing the engine to overheat and stall.
A stalled vehicle in traffic can increase the potential for a vehicle
accident.
CORRECTIVE ACTION:
Dealers will replace the complete cooling fan assembly on vehicle
having the potential shaft material problem. Dealers will install
a new fan blade including a new lock nut on vehicle with loose fan
blade lock nuts.
NOTE:

FUSES & CIRCUIT BREAKERS
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
Right Tail & Side Lights
8 - 10 Amp
Left Tail & Side Lights
9 - 20 Amp
Rear Window & Mirror Heating
10 - 15 Amp
Foglights
11 - 10 Amp
Left High Beam, High Beam Indicator
12 - 10 Amp
Right High Beam
13 - 10 Amp
Horn, Radiator Fan
14 - 15 Amp
Back-Up Lights, Electric Mirrors, Heated Windshield Washer
Jets
15 - 10 Amp
Engine Electronic
16 - 15 Amp
Warning/Indicator Lights, Multi-Function Indicator, Glove Box
Light, Cassette Storage Light, Rear Spoiler
17 - 10 Amp
Turn Signals
18 - 20 Amp
Fuel Pump, Oxygen Sensor
19 - 30 Amp
Radiator Fan, Air Conditioner
20 - 10 Amp
Brakelights, Cruise Control
21 - 15 Amp
Dome & Luggage Compartment Lights, Cigarette Lighter, Central
Locking System, Multi-Function Indicator
22 - 10 Amp
Radio
CAUTIONS & WARNINGS
ELECTRICAL SHOCK
WARNING: Contact with live components of ignition system while
engine is running could lead to a fatal electric shock.
RADIATOR FAN
Keep hands away from radiator fan. Fan is controlled by a
thermostatic switch which may come on or run for up to 15 minutes even
after engine is turned off.
RADIATOR CAP
CAUTION: Always disconnect the fan motor when working near the
radiator fan. The fan is temperature controlled and could

FUSES & CIRCUIT BREAKERS
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 09:11PM
position from passenger's side of vehicle in case of
accidental air bag inflation
ANTI-LOCK BRAKE SYSTEM
The anti-lock brake system contains electronic equipment that
can be susceptible to interference caused by improperly installed or
high output radio transmitting equipment. Since this interference
could cause the possible loss of the anti-lock braking capability,
such equipment should be installed by qualified professionals.
CATALYTIC CONVERTER
To prevent catalytic converter overheating, DO NOT allow
engine to idle for more than 20 minutes.
END OF ARTICLE

G - TESTS W/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 Self-Diagnostics
Corrado SLC
INTRODUCTION
If no faults were found while performing preliminary
inspection procedures, proceed with self-diagnostics. If no fault
codes or only pass codes are present after entering self-diagnostics,
proceed to H - TESTS W/O CODES article for diagnosis by symptom (i.e.,
ROUGH IDLE, NO START, etc.).
NOTE: Scan Tester (VAG 1551) must be used to make full use of the
self-diagnostic system capabilities.
SELF-DIAGNOSTIC SYSTEM DESCRIPTION
Hard Failures
Hard failures of monitored sensors and/or components, cause
Malfunction Indicator Light (MIL) to come on and remain on until
problem is repaired. If malfunction indicator CHECK ENGINE light comes
on and remains on during vehicle operation, cause of malfunction must
be determined.
If malfunctions are present for more than 5 seconds, they are
stored as Diagnostic Trouble Codes (DTCs) and will be displayed as a
permanent malfunction even though the malfunction is not occurring at
the time DTCs are displayed. Malfunctions that affect oxygen sensor
control can only be read accurately after a test drive of at least 5
minutes.
Intermittent Failures
If a malfunction occurs for a maximum of 5 seconds, they are
stored and considered to be "sporadic" (intermittent failures). When
displayed on scan tester, malfunctions will have "SP" (sporadic) code.
RETRIEVING CODES
NOTE: See ENTERING SELF-DIAGNOSTICS for additional scan tester
operating instructions.
Corrado SLC
1) Turn ignition on. Connect Jumper Cable (357 971 514E) to
Data Link Connectors (DLC) located in center console. See Fig. 1.
Black end of jumper cable attaches to Black data link connector; White
end of cable attaches to White connector.
2) Leave jumper cable attached for 5 seconds, until on-board
diagnostic CHECK ENGINE light begins to blink. Remove jumper cable.
Allow on-board diagnostic code retrieval procedure to run until Code

G - TESTS W/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
4444 (no faults indicated) or Code 0000 (end of output) appears. To
end code retrieval procedure, reconnect jumper cable to data link
connectors or turn ignition off.
3) To erase fault codes, turn ignition off. Connect jumper
cable and turn ignition on. Leave jumper cable attached for 5 seconds,
until CHECK ENGINE light begins to blink.
4) When light displays code 4444 (no faults indicated),
reconnect jumper cable to data link connectors or turn ignition off to
end code clearing procedure. Fault memory is now erased.Fig. 1: Retrieving Fault Codes (Typical)
Courtesy of Volkswagen United States, Inc.
ECM LOCATION
ECU/ECM LOCATIONÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication Location
Corrado .......... Below fresh air intake on firewall

G - TESTS W/CODES
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 09:11PMÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ TROUBLE CODE IDENTIFICATION
TROUBLE CODE IDENTIFICATION (CORRADO SLC) (1)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄDTC (2) System/ Possible
(Blink) Code Affected Circuit Cause/Repair
00281 (1231 ......... Vehicle Speed Sensor .... Open Ckt (No Signal
From Speedometer)
00513 (2111) ....... Engine Speed Sensor ....... Open Ckt Or Loose
Or Faulty Sensor
00515 (2113) ........ Hall Effect Sensor ....... Open/Short Ckt To
Ground Or Battery
Voltage
00518 (2212) ... Throttle Valve Potentiometer .. Open/Short Ckt To
Ground Or Battery
Voltage
00522 (2312) ....... Coolant Temp. Sensor ...... Open/Short Ckt To
Ground Or Battery
Voltage
00524 (2142) ......... Knock Sensor I ...... Open Ckt Or Short Ckt
To Battery Voltage
00525 (2342) ....... Oxygen (O2) Sensor ........ Open/Short Ckt To
Ground Or Battery
Voltage
00527 (2412) .... Intake Air Temp. Sensor ...... Open/Short Ckt To
Ground Or Battery
Voltage
00532 (2234) ........ Supply Voltage ........ Battery Voltage Less
Than 10.0 Volts Or
More Than 16.0 Volts
00533 (2231) .. Idle (IAC Valve) Regulation .. Intake System Leaks
Or IAC Valve Stuck
Or Dirty
00535 (2141) ..... Knock Sensor (Primary) ........ Defective Knock
Sensor In ECM
(Replace ECM)
00537 (2341) .. Oxygen (O2) Sensor Regulation ... (3) Control Limit
Exceeded Or Not
Reached
00540 (2144) ....... Knock Sensor II .......... Open/Short Ckt (No
Signal to ECM
00543 (2214) .... Maximum RPM Exceeded .. RPM Signal Interference;
Engine RPM Exceeded
Cut-Off Point
00545 (2314) ... Engine/Transmission Signal .. Short Ckt To Ground
00553 (2324) ..... Mass Airflow Sensor ....... Short Ckt To Ground
Or Battery Voltage
00561 (2313) ... Fuel Mixture Adaptation .... ... (4) Control Limit
Not Reached Or

G - TESTS W/CODES
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 09:11PM
Exceeded
00585 (2411) ... EGR Temperature Sensor ...... Short Ckt To Ground
Or Faulty Sensor
00586 (----) ........ EGR Control ........ EGR Valve Sticking Open
01025 (----) .. Malfunction Indicator Light .... Open/Short Ckt To
Ground Or Battery
Voltage
01242 (4332) ...... ECM Output Stage ........ Faulty Ckt To Output
Check Controlled
Components
01247 (4343) ... EVAP Frequency Solenoid ...... Open/Short Ckt To
Ground Or Battery
Voltage
01249 (4411) ....... Injector No. 1 ............ Open/Short Ckt To
Ground Or Battery
Voltage
01250 (4412) ....... Injector No. 2 ............ Open/Short Ckt To
Ground Or Battery
Voltage
01251 (4413) ....... Injector No. 3 ............ Open/Short Ckt To
Ground Or Battery
Voltage
01252 (4414) ....... Injector No. 4 ............ Open/Short Ckt To
Ground Or Battery
Voltage
01253 (4415) ....... Injector No. 5 ............ Open/Short Ckt To
Ground Or Battery
Voltage
01254 (4422) ....... Injector No. 6 ............ Open/Short Ckt To
Ground Or Battery
Voltage
01257 (4431) .. Idle Air Control (IAC) Valve ... Open/Short Ckt To
Ground Or Battery
Voltage
01259 (4433) ....... Fuel Pump Relay ....... Open Ckt Or Short Ckt
To Battery Voltage
01265 (4312) .. EGR Frequency (2-Way) Valve .... Open/Short Ckt To
Ground Or Battery
Voltage
65535 (1111) ... Electronic Control Module .... Replace Faulty ECM
(1) - For testing information, see J - PIN VOLTAGE CHARTS article.
(2) - Blink code is 4-digit malfunction indicator CHECK ENGINE
light code.
(3) - Check intake and exhaust systems for leaks. Check for too low
or too high a fuel pressure. Also check for malfunctioning
fuel injectors or engine misfire.
(4) - Check intake and exhaust systems for leaks. Check for mass
airflow sensor hot wire not burning off cleanly. Check for
faulty oxygen sensor control and for EVAP frequency solenoid
sticking open. Also check for malfunctioning fuel injectors or
engine misfire.

G - TESTS W/CODES
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 09:11PMÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ENTERING SELF-DIAGNOSTICS
VAG ON-BOARD DIAGNOSTICS
NOTE: If VAG SELF-DIAGNOSIS (VAG ON-BOARD DIAGNOSTIC) display
does not appear on scan tester, check DLC terminals for
battery voltage and ground. Upper terminal should have
battery voltage, bottom terminals serve as ground.
Corrado SLC
1) Ensure battery voltage and fuses No. 18 and 22 are okay.
Ensure engine ground connections at cylinder head cover and at
manifold are okay.
2) Connect Scan Tester (VAG 1551) to Data Link Connectors
(DLC) located in center console, in front of shift lever. Attach Black
connector first, wait for VAG ON-BOARD DIAGNOSTIC display, then
connect White connector. DO NOT connect scan tester Blue connector.
3) Turn ignition on or start engine depending on function
being selected. See appropriate SELECTABLE FUNCTIONS table. Press "1"
button to select RAPID DATA TRANSFER function.
4) Press "0" and "1" buttons to select ENGINE ELECTRONICS
function. Press "Q" button to enter input. Electronic Control Module
(ECM) identification will be displayed on scan tester.
5) If CONTROL MODULE DOES NOT ANSWER message is displayed,
press HELP button to print a list of possible causes. With scan tester
in RAPID DATA TRANSFER function, press right arrow button. Press "02"
to "08" buttons to select desired function. Press "Q" button to enter
input.
SELECTABLE FUNCTIONS (CORRADO SLC) (1)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄFunction Ignition On Engine On
02 (Read DTC/Fault Memory) .. ..... ............. X
03 (Output Check/
03 Diagnostic Test Mode) ...... X .......... .....
04 (Start Basic Setting) ..... ..... ............. X
05 (Erase DTC/Fault Memory) .. ..... ............. X
06 (End Output) ............... X ............... X
08 (Read Measuring Value Block) X ............... X
(1) - Press HELP button at any time to obtain additional
scan tester operating instructions.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ OUTPUT CHECK DIAGNOSIS (OUTPUT DIAGNOSTIC TEST MODE)
NOTE: See ENTERING SELF-DIAGNOSTICS for additional scan tester
operating instructions.

G - TESTS W/CODES
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
arrow button twice to select END OUTPUT function on scan tester. Press
"Q" to enter input. Turn ignition off. Disconnect scan tester.
READ MEASUREMENT & READ MEASURING (TEST) VALUE BLOCK
NOTE: See ENTERING SELF-DIAGNOSTICS for additional scan tester
operating instructions.
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 READ MEASURING VALUE BLOCK function, press "01" to "06"
buttons to select desired display group. See appropriate DISPLAY GROUP
table.
2) When display group is selected, only the second number is
shown on display (the zero does not appear on display). With READ
MEASUREMENT BLOCK function completed, select END OUTPUT function on
scan tester. Turn ignition off. Disconnect scan tester.
DISPLAY GROUP (CORRADO SLC)ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄDisplay Group Number Display
& Channel Number Parameters
01
1 ..................................... Engine Speed
2 ....................... Engine Coolant Temperature
3 ............................. Oxygen Sensor Signal
4 .................................. Ignition Timing
02
1 ..................................... Engine Speed
2 ................................... Injection Time
3 ................................... System Voltage
4 .................. EGR Temperature (If Applicable)
03
1 ..................................... Engine Speed
2 ...................................... Engine Load
3 ................................... Throttle Angle
4 ............. Intake Air Temperature (At Manifold)
04
1 ..................................... Engine Speed
2 ...................................... Engine Load
3 .................................... Vehicle Speed
4 .............. Switch Positions (Operating Status)
05
1 ..................................... Engine Speed
2 ..................... Idle Air Control (IAC) Valve
3 ................................... IAC Duty Cycle
4 ............ Switch Positions (A/C & Auto. Trans.)
06
1 ............................. Oxygen Sensor Signal
2 ........... Oxygen Sensor Adaptive Learning (Idle)