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Posted on Jan 02, 2017
The EDU drives the spill control valve at high speeds. The EDUs high speed driving under high fuel pressure conditions is achieved through the use of a DC/DC converter that provides a high voltage, quick charging system. The engine ECU constantly monitors the EDU and stops the engine in case an abnormal condition is detected. The battery voltage is increased by the DC/DC converter. A voltage of approximately 50 V is applied to the spill control valve in accordance with the IJ+ signal received from the engine ECU. At this time, the injection verification signal (IJF) is sent to ECU.
- Faulty EDU - EDU harness is open or shorted - EDU circuit poor electrical connection - Faulty Spill control valve
Hope this helps.
Posted on Oct 05, 2016
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