Honda ECU component sourcing reference
Historic supplier part numbers for components used when socketing, modifying, or repairing Honda OBD0 and OBD1 ECUs.
Adapted from pgmfi.org wiki
This is a cleaned transcription of the component and supplier numbers collected by the original pgmfi community for Honda OBD0 and OBD1 ECU work. Supplier catalogs change, so use these numbers as search references and verify package, value, voltage rating, pinout, and dimensions before ordering.
Warning: Similar-looking components are not necessarily interchangeable. Check the ECU board revision and the replacement component's datasheet before soldering it in.
Capacitors
| Value | Description | Board locations | Source note | 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 | JDM P30 and similar surface-mount ECUs | 399-1230-1-ND |
| 0.00001 uF | Surface-mount capacitor | C91, C92 | JDM P30 and similar surface-mount ECUs | 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 or source note | Historic supplier number |
|---|---|---|
| SST 27SF512 | Erasable ROM for a bin file | Mouser 804-27SF5127CPG |
| AT29C256 | Erasable ROM; listed as obsolete in source | Digi-Key AT29C256-70PC-ND |
| AT27C256R | EPROM; source includes the unexplained note 15/12/10 |
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 for USDM boards | Digi-Key 296-1591-5-ND |
| 20-pin DIP socket | Tin socket for DIP latch | Digi-Key ED3120-ND |
| 74HC373NS | SOP address latch for JDM surface-mount boards | Digi-Key 296-8310-1-ND |
Transistors, diode, and connector
| Component | Board locations or use | Source cross-reference | Historic supplier number |
|---|---|---|---|
| PNP A143 | Q101 |
A143 / NTE2362 | 2SB1030ARACT-ND |
NPN C144 |
Q26, Q30 |
C144 / C2785 / NTE2361 |
2SD1423ARACT-ND |
| 1N4001, 1 A diode | D11 | - | 1N4001DICT-ND |
| 0.1-inch, 4-pin friction-lock header | OBD1 CN2 datalogging |
Manufacturer 640456-4 |
A1922-ND |
| Motorola 2.5-bar MAP sensor | Increased boost | Manufacturer note 737390003 |
MPX4250AP-ND |
Related
Credits and source
Authors blundar, rschoener, phiz, xenocron, Speedz, projekteg, synoptic, kyleirwin, thc07
Source Adapted from Parts For EC Us on pgmfi.org wiki. Licensed under CC BY-NC-SA 1.0.