Volkswagen Corrado (1993 year). Manual - part 153

 

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Volkswagen Corrado (1993 year). Manual - part 153

 

 

HOW TO USE SYSTEM WIRING DIAGRAMS 

HOW TO USE SYSTEM WIRING DIAGRAMS 

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END OF ARTICLE

I - SYSTEM/COMPONENT TESTS 

         1993 ENGINE PERFORMANCE
         System & Component Testing - Motronic

         Corrado SLC

         INTRODUCTION

         Since many computer-controlled and monitored components set a
trouble code if they malfunction, also perform test procedures in the
G - TESTS W/CODES article. In most instances, Scan Tester (VAG 1551)
must be used to test systems and/or components. See ENTERING SELF-
DIAGNOSTICS in the G - TESTS W/CODES article for additional scan
tester operating instructions. See Fig. 1.

         COMPONENT LOCATIONS

Fig. 1:  Component Locations (Corrado SLC)
Courtesy of Volkswagen United States, Inc.

I - SYSTEM/COMPONENT TESTS 

         ELECTRONIC CONTROL MODULE (ECM)

         Ground & Power Circuits
         Check ECM ground and power circuits using the values in the
appropriate J - PIN VOLTAGE CHARTS article.

         ENGINE SENSORS & SWITCHES

         ENGINE COOLANT TEMPERATURE SENSOR

         Corrado SLC (2.8L)
         1) Ensure engine is cold. Connect Scan Tester (VAG 1551) to
Data Link Connectors (DLC) located in center console, in front of
shift lever. Start engine and allow it to idle.
         2) With scan tester in READ TEST VALUE BLOCK function, select
group No. 01 and read coolant temperature value in field No. 2 of scan
tester. Temperature value must increase uniformly without
interruption. If value increases as specified, select END OUTPUT
function on scan tester.
         3) If displayed value does not change or if engine
malfunctions during certain temperature ranges, turn ignition off and
measure engine coolant temperature sensor resistance. See ENGINE
COOLANT TEMPERATURE SENSOR RESISTANCE table.

ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE

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Temperature 

ø

F (

ø

C)                      Ohms

68 (20)  .........................  3000-2000
86 (30)  .........................  2000-1500
104 (40)  ........................  1500-1000
122 (50)  .........................  1000-800
140 (60)  ..........................  700-500
158 (70)  ..........................  500-375
176 (80)  ..........................  375-275
194 (90)  ..........................  275-225

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         INTAKE AIR TEMPERATURE SENSOR

         Corrado SLC (2.8L)
         1) Turn ignition off. Disconnect intake air temperature
sensor. Remove sensor from intake manifold and plug opening in
manifold. Reconnect sensor to wiring harness.
         2) Connect Scan Tester (VAG 1551) to Data Link Connectors
(DLC) located in center console, in front of shift lever. Start engine
and allow it to idle. With scan tester in READ TEST VALUE BLOCK
function, select group 03 and read intake air temperature sensor value
in field No. 4 of scan tester.
         3) Spray sensor with cooling spray and observe value on scan

 

 

 

 

 

 

 

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