The leak detection pump (LDP) is a vacuum-driven, ECM-controlled, diaphragm pump
Audi technical service bulletin 01146520355194 for 2013-2014 Audi Q7.
- Bulletin number
- 01146520355194
- Component
- Engine and engine cooling
- Summary
- The leak detection pump (LDP) is a vacuum-driven, ECM-controlled, diaphragm pump. In order for the LDP to operate, the engine must be running and vacuum must be applied to the vacuum switch on the LDP. The LDP pressurizes the EVAP system and monitors any pressure drop within a specified amount of time in order to detect a leak.
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