Affected Component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

Date Published
NOV 01, 2013
NHTSA TSB #
10225014
TSB Document
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.