Denshigiken M66911 Based ECUs

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Denshigiken M66911 Based ECUs

Description

Denshigiken M66911 Based ECUs also widely known as Honda Accord Prelude OBD1 ECU.
Introduced in 1990 OBD1 generation of ECUs for F, H Series of Engines based on OKI M66911 MCU.

Use external EPROM and can be reprogrammed with any stock ROM of this ECU Family

Compatible Devices

Equipped in Cars

Known ECU Revisions

ECU Revision Code Location

Square Case ECUs (early 90-93 models)

Rectangle Case ECUs (later 92-95 models)

ECU List

ECU Label Decode
Chasis Code Location
ECU Code Engine Chasis Codes
PT3 F22A1 SOHC
PT5 F20A7 SOHC
PT6 F22A6 SOHC
P0A F22B1 SOHC VTEC
P0B F22B SOHC
P0C F22B DOHC
P0K F22B5 SOHC
P0L F20B3 SOHC
P11 F20A4 SOHC
P12 F22A1 SOHC
P13 H22A DOHC VTEC
P14 H23A DOHC
P39 F22B DOHC

Hardware Modifications

Pinout Diagram

M66911 Denshigiken Pinout.jpg