Guest |555| Posted March 27, 2011 Report Share Posted March 27, 2011 I have installed quite a few of these ecus the last time, but today I got a strange problem. Today I installed the V44 in a N/A rally car and wired the outputs as usual. aux 1 fuel pump aux 2 tacho aux 3 water pump aux 4 cooling fan All is wired through relays, and supply from ecu and relay coils is wired direct from mains switch through fuse panel. I tested all aux functions and worked great. I use low side triggering for relays. Then when setting base timing, I disabled injectors by setting to off. This time I also found out that maybe was good idea to turn off fuel pump also while setting base timing, so I set aux 1 to off. After setting base timing, it was time to start engine, and I set injectors to sequential and aux 1 to fuel pump and stored. But the ecu refuse to trigger fuel pump. After some testing I found that only aux 2 and 4 working now. I even tried to rewire for aux 5 through 8, but no luck. Only aux 2 and 4 works. No fuel pump or water pump works when set to on and low polarity. Ignition and injector drives works perfectly. I even tried to update firmware and tried a calibration from a similar engine without luck. Anyone got a clue what could be wrong? Wiring and fuses and things like this is ok. Thanks in advance Ivar Finnvik Norway Posts: 1 Joined: Tue Mar 16, 2010 11:59 pmTop -------------------------------------------------------------------------------- Quote Link to comment Share on other sites More sharing options...
Guest |555| Posted March 27, 2011 Report Share Posted March 27, 2011 BTW, I recall that I got some "set axis to zero" question when I turned the fuel pump off first time. dont know if this is relevant, but I just mention it. BR Ivar Quote Link to comment Share on other sites More sharing options...
rayhall Posted March 27, 2011 Report Share Posted March 27, 2011 Ivar, I do not know what is wrong. Email me the map in the ECU so I can test it. [email protected] Quote Link to comment Share on other sites More sharing options...
Guest |555| Posted March 27, 2011 Report Share Posted March 27, 2011 Problem solved. Problem was not the car ecu, but the installers ECU.. When I found my glasses I found out that I had installed 2 24v relays, and they dont trigger unless charger was connected... BR Ivar Quote Link to comment Share on other sites More sharing options...
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