Scan Tool Connecting and Initial Checks

Diagnostic Tester, Connecting

Recommended special tools and equipment e.g.:







- VAS5052 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 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)