Versatile Engine Management Systems - VEMS wiki

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		2015-01-01 07:00:00 . . . . MembersPage/MarcellGal ["last week's" finding: grounds must be connected]
		2015-01-01 07:00:00 . . . . MembersPage/MarcellGal ["last-week's" finding: grounds must be connected]
		2015-01-01 07:00:00 . . . . MembersPage/PhatBob [VCC maybe the cause of the problem reads 0.3v on pin 8]
		2015-01-01 07:00:00 . . . . MembersPage/PhatBob [Added requested picture]
		2015-01-01 07:00:00 . . . . MembersPage/MarcellGal [trigger hint]
		2015-01-01 07:00:00 . . . . MembersPage/MarcellGal [hint: bad waveform would explain it all]
		2015-01-01 07:00:00 . . . . MembersPage/PhatBob [LM1815 voltage readings]
		2015-01-01 07:00:00 . . . . MembersPage/PhatBob [Further test results]
		2015-01-01 07:00:00 . . . . MembersPage/PhatBob [Added requested information for tests]
		2005-11-23 18:28:06 . . . . MembersPage/MarcellGal [VR hints]
		2005-11-23 18:25:32 . . . . MembersPage/MarcellGal [hints for measurements]
		2005-11-23 18:01:34 . . . . 88-110-1-112.dynamic.dsl.as9105.com [Information and Question for VR sensor issue]

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Changes by last author:

Added:

It turned out that the testbench (not the factory testbench of course, but the testbench built by the customer) with missing GND (EC36pin26) connection ruined the P259 (TPIC6A259) chip in 2 of the ECMs. The P259 chips shorted the supply for the LM1815 (VR-input-processing) trigger chip. Removing the P259 fixed the problem. (There are 10 FETs installed anyway which provide enough outputs, so the P259 outputs usually not used for a 4-cyl anyway). Grounds must be connected (GND and GND5 wires), there has never been an exception to this rule for assembled controllers (unassembled bare boards were shipped with an GND-GND5 arch in 2004, to remind the user of the importance of ground wires: but the arch is cut during assembly), more on MembersPage/PhatBob/UserGuide.