Test sequence: Notes

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Switch off ignition.
Remove wiper arms and plenum chamber cover: → 92 WINDSHIELD WIPER & WASHER SYSTEM
Unlock the Diesel Direct Fuel Injection Engine Control Module connector and pull it off.
Connect test box VAG1598/31 to Diesel Direct Fuel Injection Engine Control Module J248. The control module wiring harness is not connected by this action.

Check end resistor in engine control unit.
Perform a resistance measurement between the test box sockets

Sockets 6 + 7:

Specification: 60 to 72 Ω