audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

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Specified value: approx. battery voltage

If specified value is not obtained:

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Check wire connections for open circuit according to wiring diagram:
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Specified value: Wire resistance max 1.5 Ohms

Checking activation

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Connect multimeter for voltage measurement as follows.

Relay carrier in E-box, plenum

Measure to

chamber, position 2
Terminal

4

B+

-

Switch ignition on.
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Specified value: approx. battery voltage

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Switch ignition off.

If specified value is not obtained.

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Connect test box to wiring harness of Engine Control Module (ECM); ECM is not connected. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring
Testing

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Check the following wire connection for open circuit according to wiring diagram:

Relay carrier in E-box, plenum

Test box

chamber, position 2
Terminal

Socket

4

23

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Specified value: Wire resistance max 1.5 Ohms

-

Also check the wire for short circuit to B+ and Ground (GND).
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Specified value: Infinity Ohms (no continuity)

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If necessary, repair wire connection.

If no malfunctions are detected:

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