PM9

Essentially a PM5

The PM5 + PM9 are essentially the same ECU. I think one may have been for the 4 speed and one the 5 speed, but I'm not sure. (blundar)

The PM9 that I posted was from a 4 speed HF model Civic. You may be correct in your thoughts. (Warrick)

The PM5+PM9 used two distinct designs (kinda like the PG7) - the 88-89 Use an 83C154 while the 90-91 use a 66201. The 90-91 processor quadrant looks a lot like an OBD1 ECU.

Attachment:	Modify:	Size:	Date:	Who:	Comment:
pm9top.jpg	mod	532694	25 May 2004 - 17:20	warrick	PM9 top view
pm9bottom.jpg	mod	492973	25 May 2004 - 17:22	warrick	PM9 bottom view