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: |
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 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 |
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