Scan Tool Connecting and Initial Checks

Diagnostic Tester, Connecting

Recommended special tools and equipment e.g.:







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

Requirements







- The respective fuses of the Motronic fuel injection and ignition system must be OK
- Battery voltage must be at least 11.5 volts.
- All electrical consumers such as, 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 and let it run at idle, 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 Data Link Connector (DLC).