PM5
88-91 Civic base model/CRX DX (DPFI D15b)
There were two distinct styles of this ECU.  One features an 83C154 MCU, one features a 66201 MCU.  Presumably 88-89 vs 90-91 ?
-  PM5 dx ECU, "old" 83C154 style, thanks TJ: 
 
     
 
 
 |  Attachment?:  |  Modify:  |  Size:  |  Date:  |  Who:  |  Comment:  |  
    PM5dxTJ.jpg      |   mod      |   207404   |   22 Jul 2004 - 16:33   |   blundar   |   PM5 dx ECU, thanks TJ   |  
    PM5-230.jpg      |   mod      |   70958   |   22 Jul 2004 - 16:34   |   blundar   |   closeup of ROM area on 90-91 PM5   |  
    pm5-230_rom.gif      |   mod      |   343664   |   20 Mar 2005 - 18:32   |   1net   |   one more 90-91 PM5  ( chips readable)   |  
    DSC00474.JPG      |   mod      |   2382041   |   08 Jul 2005 - 14:52   |   1net   |   90-91 PM5 (image is great for comparing P04 & PM5)   |  
 
 |   
       
      
      
      
       Copyright © 2002-present by the contributing authors. All material on this collaboration platform is the property of the  contributing authors, and is covered by the Non-Commercial Share-Alike License unless explicitly stated otherwise. | 
          
       
         
    |