MembersPage/RichardBarrington/SubaruFeatures (2006-11-19 03:28:23)

This page documents ECU features to be utilised in the EJ25 N/A DOHC installation


Feature Spec Hardware utilised Software support Priority
Sequential injection 4 x 11.5 Ohm injectors 4 x injector drivers Yes -
Wasted spark ignition Diamond F-569 coilpack. 0.62 - 0.76 Ohms primary, 17.9 - 24.5 K-Ohms secondary. 4 x ignition drivers Yes -
Stepper idle control   Stepper outputs Yes -
Fuel pump   Fuel pump relay output Yes -
MAP 0-5V range OEM external pressure sensor (Auto and Turbo models only?) Yes -
LCD   4x40 LCD output Yes -
Dual wideband lambda Bosch LSU WBO2 channels 1 and 2 Partial (comparison and range testing should be done) Low
EGT   EGT sensor Partial (is this used for more than display?) Low
Knock sensor "AC voltage output" Knock channel Partial (is this used for more than display?) Low
Cooling fans   2 relay outputs Partial (only 1 fan switch is supported) Medium
Subaru crank trigger 87/32 degree signal, TDC 10 before. Magnetic VR VR 1 No High
Subaru cam sync 1,2 or 3 pulses to determine cylinder, so order is important (eg, to know cyl. 1 vs cyl. 4). Magnetic VR VR 2 No High
EGR Valve Solenoid Misc driver 1 No Medium
PCV Valve Solenoid Misc driver 2 No Medium
Pressure Select Valve Solenoid (manifold/barometric select) Misc driver 3 No Medium
EVAP Valve Solenoid Misc driver 4 No Medium
Warning Lamp (CEL) Dashboard lamp Misc driver 5 No Low

In [MoSCoW] parlance: High = Must Have, Medium = Should Have, Low = Could Have.

[dnb]Very interested to see how this goes...

The MAP sensor is indeed only present on turbo cars.

The injectors are low impedance IIRC - however resistor packs can get around this. Supporting the VR trigger itself is no problem, but the crank trigger pattern does not seem straight forward to me... I do have a source for direct replacement 36-1 wheel though! What will you use the pressure exchange solenoid for? Baro correction?