Entering Self-Diagnostics
- Ensure battery voltage and fuses No. 18 and 22 are okay. Ensure engine ground connections at cylinder head cover and manifold are okay.
- Connect Scan Tester (VAG 1551) to Data Link Connectors (DLC) located in center console, in front of shift lever. See Figure Attach Black connector first, wait for VAG ON-BOARD DIAGNOSTIC message, then connect White connector. DO NOT connect Blue connector.
- 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.
- 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.
- 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 (1)
| Function | Ignition On | Engine On | ||
|---|---|---|---|---|
| 02 (Read DTC/Fault Memory) | N/A | X | ||
| 03 (Output Check/Diagnostic Test Mode) | X | N/A | ||
| 04 (Start Basic Setting) | N/A | X | ||
| 05 (Erase DTC/Fault Memory) | N/A | X | ||
| 06 (End Output) | X | X | ||
| 08 (Read Measuring Value Block) | X | X | ||
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