yes that is right, the single VTEC-E uses a 5 wire, so does the HX manual D16Y5.
The above is only about the 3-stage VTEC that has dual solenoids and is a D15B. The reason I'm asking is that all three: D15B 3-stage VTEC, D15Z1 VX, D16Y5 HX are ALL lean burn engines. I don't know how a D15B 3-stage goes into lean burn with a narrow band 02... must not be very lean.. or very accurate.