NIStune Z32 ECU - Manual (Page 10)

6) Air Conditioner FICD – pin 36 * Series 2 only
Series 2 FICD functionality requires routing a wire from the Z32 FICD output driver (pin 5
of IC621) directly to pin 36 (RB25 FICD output pin) as pictured below.
7) Injectors/IGN signals
Swapping of injector/IGN signals is not required. Although the pin assignments on the
ECU’s are different, when the Z32 ECU is used with R33 RB25DET wiring loom, the
injector banks correspond with the intended injection order. So no modification is required.