Cars · Ecu
Honda ECU Component Sourcing Reference
Reference guide for historic supplier part numbers for electronic components used in the modification and repair of Honda OBD0 and OBD1 ECUs.
This document provides a reference for component specifications and historic supplier part numbers for Honda OBD0 and OBD1 ECU hardware. Supplier catalogs and inventory availability change frequently; use these numbers as search references and verify package, value, voltage rating, pinout, and dimensions against current datasheets before ordering.
Warning
Similar-looking components are not necessarily interchangeable. Always verify the ECU board revision and the replacement component's datasheet before soldering.
Capacitors
| Value | Description | Board Locations | Historic Digi-Key Number |
|---|---|---|---|
| 22 pF | Ceramic disc capacitor | C72, C74, C75, C89 | 1330PH-ND |
| 0.1 uF | Ceramic disc capacitor | C51, C52 | 399-2081-ND |
| 1 uF, 35 V | Electrolytic capacitor | C60 | 478-1835-ND |
| 4.7 uF | Tantalum electrolytic capacitor | C94 | 399-1358-ND |
| 0.004 uF | Surface-mount capacitor | C49, C50 | 399-1230-1-ND |
| 0.00001 uF | Surface-mount capacitor | C91, C92 | 399-1192-1-ND |
Resistors
| Value | Description | Board Locations | Historic Digi-Key Number |
|---|---|---|---|
| 1 kohm | 1/4 W, 5% resistor | R54 | 1.0KEBK-ND |
| 1.2 kohm | 1/4 W, 5% resistor | R54 | 1.2KEBK-ND |
| 220 ohm | 1/4 W, 5% resistor | R107 | 220EBK-ND |
| 10 kohm | 1/4 W, 5% resistor | R142, R144, RM11 pins 1-2 | 10KEBK-ND |
| 15 kohm | 1/4 W, 5% resistor | R143 | 15KEBK-ND |
| 820 ohm | 1/4 W, 5% resistor | R66, R67 | 820EBK-ND |
| 51 kohm | 1/4 W, 5% resistor | RM11 pins 2-3 | 51KEBK-ND |
| 12 kohm | 1/4 W, 5% resistor | RM11 pins 3-8 | 12KEBK-ND |
Memory, Latches, and Sockets
| Component | Description | Historic Supplier Number |
|---|---|---|
| SST 27SF512 | Erasable ROM | Mouser 804-27SF5127CPG |
| AT29C256 | Erasable ROM (Obsolete) | Digi-Key AT29C256-70PC-ND |
| AT27C256R | EPROM | Digi-Key AT27C256R-70PC-ND |
| 28-pin DIP socket | ROM socket | Digi-Key ED3628-ND |
| 28-pin ZIF socket | Zero-insertion-force ROM socket | Digi-Key A347-ND |
| 74HC373N | DIP address latch (USDM) | Digi-Key 296-1591-5-ND |
| 20-pin DIP socket | Tin socket for DIP latch | Digi-Key ED3120-ND |
| 74HC373NS | SOP address latch (JDM) | Digi-Key 296-8310-1-ND |
Transistors, Diodes, and Connectors
| Component | Board Locations | Cross-Reference | Historic Supplier Number |
|---|---|---|---|
| PNP A143 | Q101 | A143 / NTE2362 | 2SB1030ARACT-ND |
| NPN C144 | Q26, Q30 | C144 / C2785 / NTE2361 | 2SD1423ARACT-ND |
| 1N4001 | D11 | 1 A Diode | 1N4001DICT-ND |
| 4-pin header | CN2 (Datalogging) | 0.1-inch friction-lock | A1922-ND |
| MAP Sensor | Boost applications | Motorola 2.5-bar | MPX4250AP-ND |
Related
Applies to
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Cars
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Honda
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Model
Civic