Touareg 2 V6-3.6L (BHK) (2008)
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Install the test box.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Engine Control Module (ECM) (J623). Refer to --> [ Motronic Engine Control Module, Replacing ] See: Computers and Control
Systems/Engine Control Module/Service and Repair/Motronic Engine Control Module, Replacing.
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Using a Multimeter, check the Leak Detection Pump (LDP) (-V144-)electrical harness connector terminal 3 to theMotronic Engine Control
Module (ECM) Power Supply Relay (J271) terminal 2/87 for an open circuit according to wiring diagram.
Specified value: Wire resistance 1.5 ohms.
If the specification was not obtained:
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Check the wiring for a short circuit to Battery positive (+) or an open circuit.
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply is OK:
Checking output wiring
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Using a Multimeter, check the Leak Detection Pump (LDP) (-V144-) electrical connector terminal 1 to Motronic Engine Control Module (ECM)
(J623) electrical connector T94 terminal 40 for an open circuit.
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Using a Multimeter, check the Leak Detection Pump (LDP) (-V144-) electrical connector terminal 2 to Motronic Engine Control Module (ECM)
(J623) electrical connector T94 terminal 8 for an open circuit.