A4 Sedan V6-3.2L (BKH) (2007)
If any of the specifications are not obtained:
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Replace the Leak Detection Pump (LDP) (-V144- ).
If the specified values are obtained:
Checking voltage supply
‹› The voltage for the Leak Detection Pump (LDP) (-V144- ) is supplied by the Engine Component Power Supply Relay (J757).
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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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Using a Multimeter, check the Leak Detection Pump (LDP) (-V144-)electrical harness connector terminal 3 to the Engine Component Power
Supply Relay ( J757) terminal 2/87 for resistance.