audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

LDP Via Read Measuring Value Block (Mechanical Throttle)|Page 3589 > < LDP Via Read Measuring Value Block (Mechanical Throttle)|Page 3587
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Repair wiring or short circuit if necessary.

If you did not find any malfunction, however the Leak Detection Pump (LDP) did not function during the Output Diagnostic Test Mode (DTM):

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Replace LDP.

If the LED does not blink, although wiring is OK:

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Replace the Engine Control Module (ECM)

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Generate readiness code:

Checking input wiring (vehicles with electronic throttle control)

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Switch ignition off.

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Connect test box VAG1598/31 to harness connector, "Check output wiring."

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Check the following wire connections for open circuit or short circuit to Ground or plus (B+):

Electrical connector terminal

Test box VAG1598/31 socket

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Repair open or short circuit as necessary.

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Generate readiness code:

LDP Via Read Measuring Value Block (Mechanical Throttle)|Page 3589 > < LDP Via Read Measuring Value Block (Mechanical Throttle)|Page 3587