ZENIER/BCC/FCD installation By Robert Pina

There is more often then not, the need to put in an FCD/BCC fuel cut mod into your car, but the documents are either missing, or not handy. We also have added Zenier fuel cut information. Here we hope to cover any and all materials and notes.

Function:

The FCD becomes easy to install when you understand what it does. The boost sensor in your car reports a voltage to the ECU. When the ECU senses 4.4 volts, it will cut the fuel (fuel cut), and cause you to lose power. The FCD will intercept this voltage and put out a lower figure to the ECU, so that fuel cut cannot happen. The PIM wire tells the ECU the voltage, which must be cut. Each end of the PIM wire goes into the FCD so that the voltage can be altered. Only the PIM wire would be cut, the others would be "tapped", by connecting the wires to the harness, but not cutting them.

FCD Wiring:

Zenier Diode:

Where does it go?

You must cut the PIM wire, and put the zenier diode between the 2 wires, making the connection bridged again. To find the PIM wire, see the wire colors and diagrams below.

Which one do you buy?

4.3V 400mw (milliwatt) Zenier Diode

Greddy BCC:

What do the Greddy wires mean?

GREEN - goes to the cut ECU side (PIM wire)

WHITE - goes to the cut harness side (PIM wire)

BLACK - ground (E1)

RED - IG power (+B)

HKS FCD

What do the HKS wires mean?

YELLOW - goes to the cut ECU side (PIM wire)

WHITE - goes to the cut harness side (PIM wire)

BLACK - ground (E1)

RED - IG power (+B)

notes: Suggested FCD setting for 3sgte is 7 on the dial

SuperChips

What do the SC wires mean?

GREEN - goes to the cut ECU side (PIM wire)

YELLOW - goes to the cut harness side (PIM wire)

BLACK - ground (E1)

RED - IG power (+B)

notes: Suggested FCD setting for 3sgte is 7 on the dial

ECU Diagrams:

ST165:

ST185

ECU diagram needed

MR2 turbo:

Wire Colors:

ST165:

ST185:

E1 - Brown

+B - Black / Yellow Stripe

PIM - Red / White Strip

MR2 turbo:

E1 - Brown

+B - Black / Yellow Stripe

PIM - Light Blue

Thanks to mr2.com and the GT4 list for some of the information!

Thank you to Josh McLain for nudging me to make the page!!