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P5M ECU Hardware Reference (37820-P5M-G61)
Hardware analysis and component specifications for the P5M 97+ Honda Prelude 2.2VTi (EDM) OBD2 ECU.
This article details the hardware specifications and component layout for the EDM Honda Prelude 2.2VTi (Automatic) ECU, part number 37820-P5M-G61.
Technical Specifications
- Part Number: 37820-P5M-G61
- Board ID: Denshigiken E2Y-B 0014F-L5000-00
- Processor Clock (X1): 31 MHz
Component List
| Component | Part Number | Description |
|---|---|---|
| IC1 | OKI M66509 524 | Microcontroller |
| IC2 | OKI M6434 32 | Logic/Support IC |
| IC3 | OKI M6271 | Logic/Support IC |
| IC5 | MC14051 | Analog-to-Digital Converter |
| IC22 | NJM2903 (JRC) | Dual Operational Amplifier (DLC Communication) |
Communication Port (CN2)
The CN2 header is a 5-pin connector used for diagnostic communication.
| Pin | Signal | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | RX | Receive Data |
| 3 | Vcc | Power Supply |
| 4 | TX | Transmit Data |
| 5 | N/A | Not Connected |
Note
This ECU is specific to the EDM (European Domestic Market) 1997+ Prelude 2.2VTi Automatic transmission configuration. Ensure hardware compatibility before attempting any modifications or tuning.
Applies to
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