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:
Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations
- 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 -P-.
- 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. Refer to 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):
Refer to Operating instructions of the diagnostic tester
Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations