Volkswagen Corrado (1993 year). Manual - part 146

 

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Volkswagen Corrado (1993 year). Manual - part 146

 

 

G - TESTS W/CODES 

         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 

Fig. 1:  Retrieving Fault Codes (Typical)
Courtesy of Volkswagen United States, Inc.

         ECM LOCATION

ECU/ECM LOCATION

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Application                                    Location

Corrado  ..........  Below fresh air intake on firewall

G - TESTS W/CODES 

         TROUBLE CODE IDENTIFICATION

TROUBLE CODE IDENTIFICATION (CORRADO SLC) (1)

ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ

DTC (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 

(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.

 

 

 

 

 

 

 

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