Entering Self-Diagnostics
NOTE:
Before entering self-diagnostics, ensure fuses are okay and fuel pump relay is okay. Press scan tool HELP button for additional trouble shooting tips or operating information. Press arrow button to step through program sequence. When prompted by scan tool, press appropriate buttons to input information, then press "Q" button to enter input.
- Turn ignition off. Remove cover from fuse/relay block under left side of instrument panel. See Fig 1 . Connect Black connector of Scan Tool (VAG 1551) to Black connector of Data Link Connector (DLC).
- Idle engine (if engine will not start, operate starter for at least 5 seconds and leave ignition on). If no information is displayed on scan tool, check voltage supply to Black DLC. See CHECKING DATA LINK CONNECTORS. If scan tool alternately displays 1 - RAPID DATA TRANSFER and 2 - BLINK CODE OUTPUT, connect White connector of VAG 1551 to White connector of DLC. Blue connector is not used.
- Press PRINT button to turn on printer. Indicator light on PRINT button should come on. Press "1" button to select RAPID DATA TRANSFER function. Enter "01" to select ENGINE ELECTRONICS function.
- If any of the following messages are displayed, proceed to NO COMMUNICATION BETWEEN PCM & SCAN TOOL
.
- CONTROL MODULE DOES NOT ANSWER
- COMMUNICATION MALFUNCTION
- L- Or K-CONNECTION DOES NOT SWITCH TO GROUND/POSITIVE.
- If SCAN TOOL SENDS ADDRESS WORD 01 is displayed, wait for PCM identification and coding information to be displayed. Ensure information displayed matches vehicle. See PCM ENCODING .
- Push right arrow button. Function is now ready to be selected. To select function, input appropriate 2-digit code and press enter. For list of available functions, see SELECTABLE FUNCTIONS table. To print a list of available functions, press HELP button. After selecting function, go to appropriate part of this article. When finished viewing displayed data, select function 06 to end output of data.
SELECTABLE FUNCTIONS
| Input Number | Function |
|---|---|
| 02 | Read DTC Memory |
| 03 | Output Diagnostic Test Mode |
| 04 | Engine Basic Setting |
| 05 | Erase DTC Memory |
| 06 | End Data Transfer |
| 07 | PCM Encoding |
| 08 | Reading Measuring Block |
| 09 | Reading Individual Measuring Values |
| 10 | Adaptive Learning |