Q7 Quattro V6-3.6L (BHK) (2007)
Checking voltage supply
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Using a Multimeter, check the Leak Detection Pump (LDP) -V144- electrical harness connector terminal 3 to Ground (GND) for voltage.
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Operate the starter briefly.
Specified value: battery voltage.
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Switch the ignition off.
If the specified value was not obtained:
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Check the wiring for a short circuit to Ground (GND) or an open circuit.
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Check the electrical harness connector for damage, corrosion, lose or broken terminals.
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If necessary, repair the faulty wiring connection.
It the specification was obtained.
Checking wiring
If the manufacturers test box is being used. Perform the following step.
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Install the Test Box 105 Pin VAG1598/42.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Engine Control Module (ECM) J623.
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Using a Multimeter, check the Leak Detection Pump (LDP) -V144- electrical harness connector terminals to the Engine Control Module (ECM)
J623 electrical harness connector T94 terminals for an open circuit.
Leak Detection Pump (LDP) -V144-
Engine Control Module
Electrical harness connector
(ECM) J623 Electrical
terminals
harness connector T94 terminals or test box socket
1
40
2
8
Specified value: 1.5 ohms.
If the specification is 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, lose or broken terminals.
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If necessary, repair the wiring connection.