SFi Pinouts

EDM P3X (D14A3) and P3Y (D14A4)

On this page the OBD (OBD2a?) sheme of the Sfi (Simplified Fuel injection) engines are presented EDM (Europen Domestic Market) style. Some connections are different from car to car. Those are marked grey. These pinouts are very alike pinouts that used for certain D16 engines in Australia and certain D15 engines in the Middle East. The exact specs of these engines are unknown to me. However, these pinouts may be helpful for more people. Note that the connectors are the same as the A and D connector from the OBD1 ECU’s. However, the numbering has changed to OBD2a style.

Pinout of the P3X and P3Y ECUs used for D14A3 and D14A4 engines.

Nomenclature:
ACC –   A/C relay
ACS –   A/C switch
ALTC –  Alternator relay, for control purposes, not present on all ECU’s
ALTF –  Alternator switch
BKSW- Brake switch, for control purposes, not present on all ECU’s
ECT –    Engine coolant temperature
ELIMA- Electric load detection, not present on all ECU’s
FANC – Fan relay, for control purposes, not present on all ECU’s
FLR –    Fuel relay
IACV –  Idle air control valve, controls the 3 wire type IACV valve, (N)egative and (P)ositive control
IAT –     Intake air temperature
IGPLS- Ignition pulses, 1 is always present, 2 can be ignored
IGP –    Battery feed, only active when key is turned
IGR –    Engine speed
IMO –    Checks IMO code of the key and activates FLR if correct
INJ –     Injector, the numbers refer to the pair of cylinders connected (1 is on the side with the belts)
LG –      Ground for battery circuit
MAP –   Manifold absolute pressure
MIL –     Motor indication light, this one gives the control engine light (CEL) signal
PCS –   Control solenoid, this one is for the small black cylindric valve on the back of the IM
PG –     Ground for battery circuit
PSP. –  Power steering switch, not present on all ECU’s
O2S –   Oxygen sensor (lambda sensor) signal
SCS –   Service connector switch, checks if the SCS connector is hot wired (for reading engine error codes)\
SG –     Ground for 5V circuit, 1 is for the MAP sensor, 2 is for the other sensors
STS –    Starter switch
TDC –    Top dead centre
TPS –    Throttle position signal
TXD. –   Diagnostic connector, communication signal to the 3 wire connector next to the SCS connector
VBU –   Back up battery feed, always active (unless battery is removed)
VCC –   5V feed, 1 is for the MAP sensor, 2 is for the other sensors
VSS –   Vehicle speed sensor

Please, send any questions and/or remarks to me.

Dodo Bizar

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