| Dash Harness conversion This is the fun stuff. There are two methods of doing this step. Note: Using a 92 Civic ECU (OBD1) plugs is best for this conversion due to it having all the necessary wires for the Z6 ECU. If 92 ECU plugs cannot be found, try to get the plugs from a Si or EX, otherwise additional wires will need to be added. Should these instructions be used for an OBD1 B-series, a knock sensor wire will need to be added to the plugs (unless the ECU plugs are from an OBD1 Del Sol VTEC are used). It will be mentioned below. 1. Build a conversion harness. The female ECU plugs from a 92 Civic DX auto and the male plugs off an OBD0 ECU. In order to get the plugs off the OBD0 ECU, they can/may be unsoldered or it may be necessary to cut the ECU board with a Dremel tool (equipped with a cutoff blade). After the plugs were taken out and cleaned up, the wires from the OBD1 ECU plugs could be soldered onto the proper pins from the OBD0 plugs. See listing below for proper combinations. In addition to matching the wires, three wires will have to be routed into the harness to meet up with the OBD1 plugs. These wires are the VTEC wire, the VTEC oil pressure wire and an O2 sensor wire. 2. Cut off the OBD0 ECU wire plugs and splice the wires from the OBD1 ECU plugs to the wires from the OBD0 harness as listed below. You will also have to attach the 3 extra wires as mention above in #1. Here is the information on the wiring the OBD1 ECU. It is originally by StorminMatt from CRX Resource. There are several additions that have been made to the listing in the hope of making it more helpful and easy to understand, however, his post has been mostly left intact because he explains it well. �A number of people have asked me how to change the 1988-1991 ECU plugs to 1992-1995 plugs in order to use a 1992-1995 ECU for any one of a number of applications (SOHC VTEC, 2G B16A, 1992+ B18A/B18B, B17A, B18C, etc.). I figured it would be best to just make one post with this information rather than having to email everybody separately with this information. There are a couple of things to remember here. I personally prefer the numbering system whereby the pins are numbered across rather than the zig-zag system used by Honda. But I realize alot of people may prefer or are used to the zig-zag system. So for each pin (on each plug style), I list two locations for the same pin. The first is given by numbering across. The second (in parenthesis) is by the zig-zag numbering (I hope it is correct). In case I made any errors in conversion AND to make the process of changing the plugs over more goof proof, I also give the color of the wire on the 1992-1995 plug and 1988-1991 plug for the given pins. This should give you a better idea of whether you are connecting the wires together correctly. Also, the first set of pin numbers and wire colors are all on the 1992-1995 plugs and the second, the 1988-1991 plugs. Back Next Home |