slivic

I am trying to help a friend out who did a 1.5 non vtec to 1.6 vtec swap in an automatic 92-95 civic.

It is getting codes for tps, iacv, map, iat and o2. All appear to be connected properly. The only thing I can think of is that they share the same ground and that something may be wrong with that.

Does anyone know if atleast the tps, iacv, map and iat share the same ground, and if so where?

EE_Chris

IACV doesn't have a ground, per se. It has +12v fed to it from the Main Relay and ECU pin A9 controls it. It uses a 2-pin connector with a Yel/Blk & Red wires.

TPS, IAT, and O2 do share a common ground: D22
TPS is a 3-pin connector using Yel/Wht, Red/Blu & Grn/Wht wires.
IAT is a 2-pin connector using Red/Yel & Grn/Wht wires.

MAP ground: D21
MAP is a 3-pin connector using Yel/Red, Wht, and Grn/Wht wires.

However, C103, which is the gray 14 pin connector located on the passenger side shock tower (the upper most one), is something both the D21 and D22 ground wires share.

Not being a 5th gen guy, are the IAT and IACV connectors the same; are the MAP and TPS connectors the same?

Pertaining to the O2 sensor: Was he previously using the 1-wire and is now using a 4-wire O2? Obviously some wire changes would have needed to be done, so if this is the case, check the wiring?

B_CRUZ!

did he convert to manual also?

slivic

Thanks for the feedback. I checked the plugs that were interchangable and they were all ok. The o2 was a 4 wire originally. It seems to me it must be the plugs on the drivers side or at the ecu.

BTW it is still auto.