The fault diagnosis circuit of Daewoo-ESPERO fuel pump relay

Published:2011/5/18 22:22:00 Author:Borg | Keyword: fault diagnosis circuit, Daewoo-ESPERO | From:SeekIC

When the igniting switch is at the ON gear, computer ECM will start the fuel pump relay and run the pump in the oil box. When the engine starts or runs, if ECM receives the igniting reference pulse signal, the fuel pump will go on to work; if there is no reference pulse signal, then the ECM will shut down the pump in 2 secondsafter the igniting switch is on. It will lead to a long starting time of the engine if the oil pump relay doesn't work, especially when the temperature of the engine is low or the engine oil viscosity is high.



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