Scan Tool Connecting and Initial Checks

Diagnostic tester, connecting

Recommended special tools and equipment e.g.:







- VAS 5052 Vehicle Diagnostic and Information System with
- VAS 5052/3 diagnostic cable

Requirements







- The respective fuses of the Motronic fuel injection and ignition system must be OK.







- Fuses -1, 2, 3, 4 and 7- in protective housing (plenum chamber, left) must be OK:
- Battery voltage must be at least 11.5 Volts.
- All electrical consumers such as, for example, lights and rear window defroster must be switched off.
- Parking brake must be engaged or else daylight driving lights will be switched on.
- For vehicles with automatic transmission, selector lever must be in position -P-or -N-.
- If vehicle is equipped with an A/C system, it must be switched off.
- Ground (GND) connections between engine and chassis must be OK.
- Ignition switched off.

Work procedure
Connect diagnostic tester (VAS 5052) using (VAS 5052/3) diagnostic cable as follows:







- Connect diagnostic cable connector to Data Link Connector (DLC) -arrow-.
- Depending on the desired diagnostic mode, it is necessary to:switch on ignition
or start engine, selectable diagnostic modes under address word 33. Selectable Diagnostic Modes Under Address Word 33 - OBD


NOTE:
- Respective operation of the diagnostic tester:
- If no display appears on diagnostic tester, check voltage supply at Diagnostic Link Connector (DLC).