bmxican Posted March 10, 2013 Share Posted March 10, 2013 Hey there, im currently wiring a 4age 20v silvertop up on my days off. So far i have gathered quite a bit of information off the net and im very eletrically minded so i have no issues following pin oits and diagrams once ive found out what each pin on the ecus task is. Its an auto ecu with a manual box. I have so far gathered the minimum for the car to actually run is as follows. BATT - 12v constant, goes directly to the battery via a 15 amp fuse, checked and wired into the batter now, ( memory wire) +B and +B1 should be wired into the 12v ignition switch when the key is turned to on. Goes through the main engine relay? Yet to trace back to the fusebox and find the corosponding wires to switch the relay. Not to sure on the relay ? STA - wired into the 12v ignition switch when the key is in the cranking position. The ecu needs to know when the motor is cranking. Does this go through a relay ? IGSW - wired into 12v when the key is in the run position (key to on same as the +b wires?) Right i can not find this pin printed on the ecu board itself or any pin outs on the internet is it possibly refered to as something else or is it not needed in a 20v? NSW - neutral start switch - 12v to trick the euc into being in the park position, i have wired the starter motor into the factory loom so is this still required as it cranks anyway now. Any help or advice would be appreciated , feelvfree to point out wires i dont or do need to get it running, p.s. fuel pump is hard wired. Quote Link to comment Share on other sites More sharing options...
Mike-e Posted March 10, 2013 Share Posted March 10, 2013 Thats pretty much the bare minimum aside from alternator and gauges. If your not sure on the relay look harder at the wiring diagram. EFI main and circuit opening is pretty much just a lush relay setup to switch ecu power and run fuel pump. Handy in a crash so when you explode the fuel pump doesn't keep pissing 91 on your burning corpse http://club4ag.com/tech-specs/4a-ge-20v-japan-silver-top-ae101-ecu-pin-identification/ 1 Quote Link to comment Share on other sites More sharing options...
bmxican Posted March 10, 2013 Author Share Posted March 10, 2013 Sweet, should hopefully have it running shortly then. Quote Link to comment Share on other sites More sharing options...
bmxican Posted March 10, 2013 Author Share Posted March 10, 2013 I take it there is no isgw pin then? Quote Link to comment Share on other sites More sharing options...
Mike-e Posted March 10, 2013 Share Posted March 10, 2013 nope, B and +B are the on power and STA is the start power/signal Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted March 11, 2013 Share Posted March 11, 2013 i developed this table of bare minimum to run wiring when i was doing my 20v mr2 Full Size http://imageshack.us/photo/my-images/24/silvertoprequirementsjp.jpg/ Quote Link to comment Share on other sites More sharing options...
Stu Posted March 13, 2013 Share Posted March 13, 2013 Club4ag.com has the pin outs which are pretty helpful Quote Link to comment Share on other sites More sharing options...
Guest touge Posted March 13, 2013 Share Posted March 13, 2013 I presume you are using a standard ecu?if so or if you have one handy pull the lid off it and it gives all the pinouts etc. you will also need a speed signal (could be a random generated signal) or ecu does funny things. Quote Link to comment Share on other sites More sharing options...
Guest Lt Dan Posted March 18, 2013 Share Posted March 18, 2013 I have a complete silver top loom if that helps. Quote Link to comment Share on other sites More sharing options...
Guest bmxican Posted March 19, 2013 Share Posted March 19, 2013 Thanks, guys i have the loom and everything there. habe allready pulled tje lid off and looked at the pins, but what do you guys mean by a random signal to the speed wire? Quote Link to comment Share on other sites More sharing options...
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