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Summary of change:
I have access to wiring diagrams for any vehicle available in North American 1983-present. Sometimes I can cross it over to Rest Of World cars. If you need schematics for anything, feel free to email me. alandaeric at hotmail dot com ---- '''TODO: update all the pages to reflect uptodate status. Delete all old info, or move to a separat history page'''. * MembersPage/EricN/BoardSetup-step by step of putting my board together * MembersPage/EricN/WBSensor - Testing and config * MembersPage/EricN/Trigger - inputtrigger * MembersPage/EricN/Ignition - ignition advance, ignition output and coil related knowledge * MembersPage/EricN/FuelPage - Injector and fuel setup and config * MembersPage/EricN/Sensor - sensor info * MembersPage/EricN/Config - complete config and tables * MembersPage/EricN/LCD - Display related stuff * MembersPage/EricN/BuildNotes : scraps of info not organinzed ---- '''P259 likely dead, pulling internal 5V supply shared by P259 and the LM1815 (VR trigger chip) down''' - preventing triggering From the symptoms, and the fact that GND was ripped for some time, this is likely. To confirm this, after disassembling, power up the device (don't forget all GND and GND5 connections) and measure the LM1815 supply (pin8 should measure +5V from measured from GND). Maybe removing only endplate allows this measurement (especially easy if no MAP sensor). Tried to start the truck the other day * MegaTune comm works * LCD works * no rpm signal or wheel error * no fuel pump activity (untill I hit the brake pedal, then it wouldnt shut off) nothing working as far as I could tell. * Put the ecu '''on my test bench, all sensors readings look fine in megatune''', I can upload firmware, everything looks ok untill I try and do an '''mdh''' command. * I noticed the fuel pump channel (p259 ch 5?) doesnt turn on. Tried some other channels, none of the P259 channels work at all * I went out to the truck to check the wiring, found '''1 wire ripped out of ecu, the EC36 pin 26 ground wire'''. Connected. *Disabled all the channels since mdh.. can only control free outputs.mdh can not manipulate channels that are enabled in config and therefore reserved => controlled by the ECM and tested with the '''mdh'''command. *All the I259 channels are good '''0v when off and 4.93v when on''' (using logic level trigger for coils with built in amplifier) when measured to gnd. *All s259 channels seem good '''OFF .54V ON 11.63v''' *All '''P259 show 0V all the time''' When measured to 12v * Tried to check the injecter fets but I have never been able to comprehend that table look up system, I only used 2 and have 8 in place so if 2 are dead, I dont care, I have the other 6 free ** Read GenBoard/Manual/DigitalOut, GenBoard/Manual/DigitalOut/Table (ask there if you don't understand sg.) With h[0]=01 02 04 08 10 20 40 80 you get a 1-1 mapping,so mdh80/mdh00 touches injA, mdh90/mdh10 touches injB, and so on *Tested wbo2, tested to ground '''mde 02''' slowly but eventually gave me '''4.93v on the FET pin closest to the ec36''' connector, the other 2 FET pins were 0v. In relation to power, they were 11.67v when all said and done at the 2 furthest away from the ec36 and 1 shuts off with '''mde00''', basically, that fet is ok and circuit working. * We use multiple gnd5 pins. (good!) * is it ok to use multiple gnd pins too or would that cause noise issues? ** multiple GND are good, it will NOT cause noise problems if the sensor GND (most importantly VR-) is connected near the EC26pin26 (not in the GND5 current path) '''New P259 chip on order''' (2 actually, 1 for next time) ---- MY PROJECT Ford 347 stroker- on hold,(taking to long to build car) Temporarily putting it in a 61 404 unimog, mercedes 2.2l straight 6. *Standard GM map sensor *Standard Honda ect sensor *Standard Honda air temp sensor *No iac, just ignition advance idle control *Bosch WB 02 *No knock sensor yet *No egt sensor *24-1 vr sensor mounted in old distributer *LS1 cnp coils
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