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Summary of change:
The Rover V8 has a fairly simple EFI harness that maps readily to the VEMS ECU. There were two ECUs used on the hotwire systems, the 14CU and the 14CUX, each with slightly different pin-out. We've got the 14CUX to play with here. [http://www.vems.hu/files/MembersPage/RichardBarrington/lucas14cu-small.jpg http://www.vems.hu/files/MembersPage/RichardBarrington/lucas14cu-thumbnail.jpg] 1990 Hotwire diagram: [http://www.vems.hu/files/MembersPage/RichardBarrington/hotwire3.jpg http://www.vems.hu/files/MembersPage/RichardBarrington/hotwire3-thumbnail.jpg] Should we be using the 88/89 diagram instead? ---- Trigger signal - channel A, 1V per segment: [http://www.vems.hu/files/MembersPage/RichardBarrington/scope1.jpg http://www.vems.hu/files/MembersPage/RichardBarrington/scope1-thumbnail.jpg] [http://www.vems.hu/files/MembersPage/RichardBarrington/scope2.jpg http://www.vems.hu/files/MembersPage/RichardBarrington/scope2-thumbnail.jpg] ---- Pin mapping: ||'''Function'''||'''OE Wire Colour'''||'''Rover ECU pin'''||'''VEMS ECU pin'''||'''Comments'''|| ||||||||||''Power''|| ||Vbatt||White/Slate||19||EC36-25|| || ||Ground||Black||14 and 40||EC36-26||see GenBoard/Manual/GroundConnections || ||'''Power Ground'''||Black||14 and 40||EC36-21 EC36-32 EC36-5|| connect these as hard as possible: inside and outside the board || ||||||||||''Inputs''|| ||Trigger||White/Black||39||EC36-27||2.2V spike, so 733 Ohm Rext is needed|| ||TPS and CLT +5V||Red/Black||25||EC36-28||Should wire MAT into this too.|| ||TPS||Red||20||EC36-1||ideally increases with larger throttle opening. But even if it's reversed for some reason: you can now configure it|| ||TPS Gnd||Yellow||3||EC36-5||Power ground (GND5). EC36-pin26 is analog ground. But you can connect them if you like, see GenBoard/Manual/GroundConnections|| ||Coolant temperature||Green/Blue||7||EC36-14|||| ||Manifold air temp||-||30||EC36-2||Fit sensor and connect to spare ECU pin|| ||||||||||''Outputs''|| ||Fuel pump relay -ve||Blue/Purple||16||EC36-15|||| ||Injector right bank||Yellow/White||11||EC36-7||Injector channel A|| ||Injector left bank||Yellow/Blue||13||EC36-19||Injector channel B|| ||Idle stepper A||Orange||29||EC18-4|||| ||Idle stepper B||Blue/Slate||28||EC18-10|||| ||Idle stepper C||Green/White||26||EC18-5|||| ||Idle stepper D||Red/Green||1||EC18-11|||| There are spare inputs that are probably not used on this car. Things like road speed input (map to 2nd VR input) etc. It seems that TRW/Lucas can't be bothered to answer their email. So, we'll do it properly and use Econoseal connectors and make a new loom. The new loom is to be constructed from MIL-22759/16 Tefzel wire, with MIL-27500 sheilded single conductor Tefzel for the trigger wire. 150*C Tefzel cable ties will be used too. We'll use a pullable circuit breaker in place of the main fuse. We're basically going with aircraft stuff here. ---- Back to MembersPage/RichardBarrington/TonysCapri Back to MembersPage/RichardBarrington
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