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Vems V3.2 ECU '#188' wiring diagram (BMW E30, M20B25 engine).
- main relay - fuel pump relay - fusebox - sensors (CLT, IAT, TPS etc.) groundings (GND) - ohjaustransistorien maadoitukset (GND5) - RS-232 ECU programming cable - wideband oxygen sensor. - injectors - injectors flyback rail - coolant and inlet air temp sensors - crank angle / engine rotating speed sensor - engine phase / 'camshaft position' sensor - throttle 'angular' position sensor - idle air speed solenoid valve - wastegate actuator solenoid 'N75' valve. - knock sensor - ignition module - ignition coil - coolant radiator fan motor(s) (not implemented -> BMW original/mechanical wiscous coupled fan used.) - Econoseal 36 pin 'EC36' ECU connector - Econoseal 18 pin 'EC18' ECU connector ------------------------------------------------------------------ main relay (1) (= physically rightmost) / +12V feed to ECU fusebox. Pin 30 Vbatt +12V via fuse 1. 86 +12V feed via ignition key (taken from original BMW 'motorstecker'connector). 85 GND 87 +12V feed to VEMS ECU fusebox (ie. to fuses 2,3,4,5,6,7,8,9). ------------------------------------------------------------------ Fuel pump relay (2) (=left relay) / +12 V feed to fuel pump. Pin 30 Red Vbatt +12V feed via (fuse 2). 86 Red +12V relay coil feed via (fuse 1). 85 Red EC36-15 pin / fuel pump relay coil drive to GND. 87 Green +12V feed to fuel pump. ------------------------------------------------------------------ Fusebox, +12 V feed to relay coils and devices. Fuse 1 / 20 A Main power to main and fuel pump relay and other fuses. Fuse 2 / 10 A Fuel pump. Fuse 3 / 2 A VEMS ECU. Fuse 4 / 5 A WBO2 heater. Fuse 5 / 10 A Fuel rail / injectors. Fuse 6 / 3 A Idle Air Speed valve. Wastegate control valve. Fuse 7 / 10 A Ignition coil. Fuse 8 / 10 A Iginiton module. ------------------------------------------------------------------ *** Fuse 3 / 2A *** ECU +12V power feed. Pin Color EC36-25 Red -------------------- *** Fuse 4 / 5A *** Wideband lambda sensor heater to (7057) wireloom 'end connector'. Pin Color 3 brown Vbatt/relay 1 (fused +12V) sensor heater voltage (+) -------------------- *** Fuse 5 / 10A *** Fuel rail injectors Injector Color Pins 1 Red VBatt/relay 1 (fused +12 V) Note ! injector flyback rail wire after fuse to EC36-23 pin. -------------------- *** Fuse 6 / 10A *** Idle Air Speed valve (IAS) Pin Color 2 red-white Vbatt/relay 1 fused +12V Wastegate valve, ('N75 valve') Pin Color 1 yellow Vbatt fused +12V feed -------------------- *** Fuse 7 / 10A *** Ignition module Pin Color 4 red Vbatt +12V fused -------------------- *** Fuse 8 / 10A *** Ignition coil Pin Color + green Vbatt +12V shielded / fused feed. ------------------------------------------------------------------ Grounds (GND and GND5) Power ground 'GND5'. -------------------- used for the power-switchers, such as injectors, ignition and Wideband lambda sensor heater driver(s). At least two 'GND5' ground wires must be connected to ECU side. pins EC36-5, EC36-21, EC36-32 connected with yellow/green 2.5 mm2 wire. IT IS ESSENTIAL THAT ALL GND5 OUTPUTS BE USED TO ENSURE CURRENT DEMANDS CAN BE PROPERLY HANDLED WITHOUT DAMAGE. Sensor and digital ground 'GND'. ----------------------- pins EC36-26, EC18-2 connected with yellow/green 1.5 mm2 wire. At least two GND ground wires must be connected to ECU side. ------------------------------------------------------------------ Sensors, actuators and other harness groundings. Coolant temperature sensor (CLT) Pin Color 2 Yellow/green EC36-26 (GND) RS-232 cable DSUB 9-pin RS-232 female connector (to PC serial port) pin color connection and function 5 black EC36-26. RS-232 signal ground (Sensor and digital ground: GND) shielding EC36-26 Signals protection against radio frequence interference. Inlet air temperature sensor (IAT) Pin Color 2 black EC36-26 (GND) Crankshaft speed/angular position sensor (CRAS), VR sensor 60-2 pulse wheel Pin Color 1 black EC36-26 (GND) 3 transparent (shield) grounded from same physical point as EC36-26 is in ground. Throttle position sensor (TPS) Pin Color 2 gray EC36-26 (GND) Knock sensor (Knock) Pin Color 2 black EC18-2 knock GND (same as EC36-26) shielded wire grounded from same physical point as EC36-26 is in ground. ------------------------------------------------------------------ Harness connections. -------------------- RS-232 cable DSUB 9-pin RS-232 female connector (to PC serial port) pin color connection and function 2 white EC18-14. Receive data (RxD), data received by PC, transmitted by ECU (to PC). 3 blue EC18-15. Transmit data (TxD), data transmitted by PC, received by ECU (from PC). 5 black EC36-26. RS-232 signal ground (Sensor and digital ground: GND) shielding EC36-26 Signals protection against radio frequence interference. Note ! Shield is grounded at ECU end. ------------------------------------------------------------------ Wideband lambda sensor (7057) wireloom end connector Pin Color Connection 1 black EC18-13 (ie. EC 18 pin 13) (Vs / nernst cell) 2 yellow/green Not connected (xxx RCal) 3 brown Vbatt (+12V fused) sensor heater voltage (+) 4 white EC18-18 (EC 18 pin 18) (sensor heater -) 5 grey EC18-7 (ie.EC 18 pin 7) (Vs/Ip pump -) 6 red EC18-9 (EC 18 pin 9) (Ip pump +) Shielding (around pin1) EC36-26 Signals protection against radio frequence interference. ------------------------------------------------------------------ Fuelrail injectors and coolant temperature sensor (CLT) modified original BMW 'cassette'. Fuelrail injectors (fully sequential wiring). Injector Color Pins 1 Red (VBatt, fused +12 V) (Flyback rail wire connected to EC36-23.) flyback wire must be taken after fuse ie. protects against back emf if fuse blows. (flyrail johtosarjasta heti sulakkeen jälkeen). Pin 2 Inj 1 black EC36-7 Inj 2 white EC36-19 Inj 3 begins 'dark grey' ends 'light grey/blue stripe'EC36-8 Inj 4 brown EC36-20 Inj 5 blue EC36-9 Inj 6 begins light grey ends 'light grey' EC36-18 Note ! injector 3 and 6 wires has been extended (crimp connector with solder) to reach ECU. Coolant temperature sensor (CLT) -------------------------------- Pin Color 1 Red EC36-14 2 Yellow/green EC36-26 (GND) ------------------------------------------------------------------ Inlet air temperature sensor (IAT) Pin Color 1 white EC36-2 2 black EC36-26 (GND) ------------------------------------------------------------------ Crankshaft speed/angular position sensor (CRAS), 60-2 pulse wheel VR sensor. Pin Color 1 black (sensor +) EC36-27 (primary trigger) 2 yellow (sensor -) EC36-26 (GND) 3 transparent (shield) grounded to same physical point as EC36-26 is grounded. see the. BMW (E30) - Motronic - Zusammenfassung von Drehzahl- und Bezugsmarkensensor.jpg 510 Ohm +/- 5 % (measured: 531 ohm) ------------------------------------------------------------------ Engine phase / camshaft reference sensor (CAMS), Pick up from cylinder 6 spark plug wire Pin Color 1 black CAMS sensor (pin order is similar to CRAS) not connected to VEMS ECU. 2 yellow GND 3 transparent (shield) grounded to same physical point as EC36-26. Note ! Not connected to ECU. ------------------------------------------------------------------ Throttle position sensor (TPS) Pin Color 1 yellow EC36-29 (+5V TPS supply) 2 gray EC36-26 (GND) 3 green EC36-01 (TPS signal Input) ------------------------------------------------------------------ Idle Air Speed valve (IAS) 'Bosch 0 280 140 509' Pin Color 1 green-white (blue) EC18-4 (Step A) 2 red-white (red) fused +12V feed 3 yellow-white (brown) EC18-10 (Step B) Note ! Original wires extended (crimp connector with solder) to reach fusebox and ECU connector. Extended wire colors in parenthesis. ------------------------------------------------------------------ Wastegate 'N75' valve Pin Color 1 yellow fused +12V feed. 2 gray EC36-10 ('I259_7' 'Drive 07') ------------------------------------------------------------------ Knock sensor (Knock) Pin Color 1 blue EC18-3 knock signal 2 black EC18-2 knock GND (same as EC36-26) shielded wire grounded to same physical point as EC36-26. Note ! Shield is grounded at ECU end. ------------------------------------------------------------------ Ignition module (Ign Mod) Pin Color 1 shielded RG58 c/u wire (connected to Ignition Coil negative) 2 yellow-green (Ignition module Ground) 3 yellow-green (Pulse Generator Ground) 4 red Ignition Positive (+12V) 5 blue Pulse Generator / Input Signal from ECU (EC36-35 / IGN 00) 6 Not connected 7 Not connected Shielding connected to same point as other groundings. ------------------------------------------------------------------ Ignition coil (Coil1) Pin Color - shielded RG58 c/u wire from ignition module. + green (shielded) from +12V fused feed. ------------------------------------------------------------------ Econoseal 36 pin 'EC36' ECU connector 1. Blue TPS signal 2. white IAT 3. 4. 5. yellow/green 'GND5', power ground. 6. 7. black (INJ A) (Cyl. 1 injector) 8. light grey blue stripe (INJ C) (Cyl. 3 injector) 9. blue (INJ E) (Cyl. 5 injector) 10. gray Wastegate 'N75' valve. I259_7 -> 'Drive 07'. 11. 12. ----------- 13. 14. red CLT 15. red Fuel Pump Relay control 16. Green (Drive 9) 17. Red (ING H) 18. Light grey (INJ F) (Cyl. 6 injector) 19. White (INJ B) (Cyl. 2 injector) 20. Brown (INJ D) (Cyl. 4 injector) 21. yellow/green 'GND5', power ground. 22. 23. red Injectors Flyrail. 24. ----------- 25. red ECU main power 26. black GND, sensor and digital ground. 27. black 'crankshaft' speed/position 'primary' trigger signal. 28. 29. yellow TPS +5V SUPPLY 30. Green (Drive 11) 31. Green (Drive 10) 32. yellow/green 'GND5', power ground. 33. Green (Drive 1) 34. Green (Drive 2) 35. Green (Drive 0) 36. Green (Drive 3) ------------------------------------------------------------------ Econoseal 18 pin 'EC18' ECU connector 1. 2. black knock sensor '-' signal, 'GND'. 3. blue Knock sensor '+' signal. 4. blue IAS (Step A) 5. 6. ----------- 7. grey WBO sensor1 'Vs/Ip Pump -' 8. 9. red WBO sensor1 'Ip Pump +' 10. brown IAS (Step B) 11. 12. ----------- 13. black WBO sensor1 / Nernst Cell 14. white RS232, receive data (RxD) to PC. 15. blue RS232, transmit data (TxD) from PC. 16. 17. 18. white WBO sensor1 'Heater -' ------------------------------------------------------------------ Todo: link to wiring loom schematic |