Diagnostic tester, connecting
Recommended special tools and equipment
- 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:
Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations
- Fuses -1, 2, 3, 4 and 7- in protective housing (plenum chamber, left) 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 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 sequence
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, switch on ignition
or start engine. Refer to Selectable diagnostic modes under address word 33 - OBD
NOTE:
- Respective operation of the diagnostic tester:
Refer to Operating instructions of the diagnostic tester
- If no display appears on diagnostic tester, check voltage supply at Diagnostic Link Connector (DLC):
Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations