Cars · Tuning
Honda Prelude and Accord ECU Reference
Technical reference for Honda Prelude and Accord ECUs, including MCU specifications, PROM configurations, and component details for OBD0, OBD1, and OBD2 variants.
Overview
This article documents ECU specifications for Honda Prelude and Accord models across multiple OBD generations, including MCU variants, PROM configurations, and component architectures.
PT6-A51 ECU Specifications
| Specification | Value |
|---|---|
| MCU | OKI 66911 |
| External PROM | 256 kbit |
PK3-A00 ECU Specifications (1994 Prelude SI)
| Specification | Value |
|---|---|
| Engine | 1.6L DOHC |
| MCU | OKI 66911 |
| External PROM | 256 kbit |
| Support ICs | 74HC373 (16-bit latch) |
Note
Both PT6-A51 and PK3-A00 variants utilize the OKI 66911 MCU architecture with identical 256 kbit external PROM configurations, indicating common platform design across model years.