G - TESTS W/CODES
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)
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Function 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.
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OUTPUT CHECK DIAGNOSIS (OUTPUT DIAGNOSTIC TEST MODE)
NOTE: See ENTERING SELF-DIAGNOSTICS for additional scan tester
operating instructions.