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OBD0 DOHC ZC PM7 ECU Reference

Technical specifications, board layout documentation, and stock ROM binaries for the OBD0 DOHC ZC PM7 ECU.

Intermediate 6

blundar Author
Orion Author

The PM7 ECU is the engine control unit utilized for the 1988–1991 DOHC ZC engines (D16A8, D16A9, and D16Z5) found in European and Japanese market vehicles.

Note

The PM7 codebase is architecturally similar to the SOHC D16A6 PM6 codebase. Custom ROMs are often cross-compatible between these units, provided sensor configurations are adjusted accordingly.

Board Revisions

The following board revisions represent the primary hardware variants encountered in the field.

European PM7-E020

European PM7-E020 Component Side
Component side (top view) of the European PM7-E020 board.
European PM7-E020 Solder Side
Solder side (bottom view) of the European PM7-E020 board.
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Alternate PM7 Layouts

JDM PM7-0330 Component Side
Component side (top view) of the JDM PM7-0330 board.
Experimental PM7 Prototype
Component side (top view) of an early experimental PM7 ECU prototype.
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Stock ROM Binaries

The following files contain the original factory calibration data for the PM7 ECU.

ROM Version Application Size
PM7-03300 JDM 1989 DOHC ZC 32 KB
PM7-Euro0 German D16Z5 (125 HP) 32 KB

Important

Ensure the correct checksum is verified after flashing these binaries to an EPROM to prevent engine management errors.

Applies to

4 taxonomy links
Cars 3 links

Honda

3 links
Model CRX
Direct taxonomy match
Engines 1 link

Honda Engines

1 link

Attachments & Downloads

BIN Pm7-03301989.bin
Size: 32.0 KB
SHA-256: 1424bf2b...22de9b95
BIN PM7-euro.bin
Size: 32.0 KB
SHA-256: 7dc52b0e...67219408