audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

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Checking voltage supply

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Connect VAG 1527 B voltage tester as follows:

Connector

Measure against

Contact

1

Body Ground

-

The LED should light up.

Connector

Measure against

Contact

2

Body Ground

-

Switch on ignition.
-

The LED should light up.

If the LED does not light up:

-

Test for open circuit or short to Ground in wiring from contact 1 and/or contact 2 of connector:

-

Correct short circuit or open circuit if necessary.

If the LED lights up:

-

Test activation.

Checking activation

-

Connect test box VAG 1598/31 to wiring harness for engine control module. Do not connect to the engine control module itself. See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Manufacturer's
Scan Tool/Scan Tool Connecting and Initial Checks/Wiring and Component Testing Using VAG1598/31 Test Box

-

Test for open circuit and short to positive or Ground in the following wiring connections:

Connector

Test box VAG1598/31

Contact

Socket

3

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