Pinout Card
The Wall Poster — Passenger Side.
The C103 / C223 tower plug, holographic blueprint style. Prints in full color, landscape letter — the dark plate is the point. Toolbox-lid approved.
D15B Detail Hub — Garage Poster Nº 003
Honda OBD-1 ECU Connector Reference
Passenger Side — C103 / C223 · 14-pin round
VTEC pair · MAP · TPS · IAT · ECT · alternator — the sensor handshake
Hank approved
verified at the bench
verified at the bench
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Terminal view · harness side · locking tab up · pin 1 top-left
| Pin | Wire | Signal | Goes to | Expect |
|---|---|---|---|---|
| 1 | WHT/GRN | ALTC | ECU A16 | 12V → 0V |
| 2 | ORN/BLK | PO2SHTC O2 heater | ECU A6 | At operating temp: 0V |
| 3 | GRN/YEL | VTS VTEC solenoid | ECU A4 | Low rpm: 0V · VTEC engaged: 12V |
| 4 | GRN/WHT | SG1 to MAP | ECU D21 | < 1V at all times |
| 5 | WHT/YEL | MAP | ECU D17 | Key on: ~3V · idle: ~1V |
| 6 | YEL/RED | VCC1 to MAP | ECU D19 | Key on: 5V |
| 7 | BLU/BLK | VTP SW VTEC pressure | ECU D6 | VTEC on: 12V |
| 8 | RED/BLK | TPS | ECU D11 | Closed: 0.5V · wide open: 4.8V |
| 9 | GRN/BLU | SG2 to O2 | ECU D22 | < 1V at all times |
| 10 | YEL/BLU | VCC2 to TPS | ECU D20 | Key on: 5V |
| 11 | YEL/GRN | ICM | ECU A21 | Start (III): 12V · running: pulses |
| 12 | RED/YEL | IAT | ECU D15 | 0.1–4.8V by temp |
| 13 | RED/WHT | ECT | ECU D13 | 0.1–4.8V by temp |
| 14 | WHT/RED | ALT F | ECU D9 | Running: varies with load |
WHTGRNORNBLKYELREDBLU
Verify against the chart before depinning · revision differences exist · d15b-detail-hub
Posters print in full color, landscape letter — the dark plate is the point. The pinout card stays ink-friendly.