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FW-C-12M-B / FW-C-12F-B / DJ7121Y-2.3-11/21 Automotive 12-Pin Connector — Furukawa Black Male Female Wiring Socket
FW-C-12M-B / FW-C-12F-B / DJ7121Y-2.3-11/21 Automotive 12-Pin Connector Furukawa Black Male Female Wiring Socket
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FW-C-12M-B / FW-C-12F-B / DJ7121Y-2.3-11/21 Automotive 12-Pin Connector — Furukawa Black Series
The FW-C-12M-B (male plug) and FW-C-12F-B (female socket) are 12-pin black automotive connectors from the Furukawa Electric FW-C series, cross-referenced as DJ7121Y-2.3-11 (male) and DJ7121Y-2.3-21 (female) in the DJ series naming convention. Furukawa Electric is one of Japan’s largest automotive wiring harness manufacturers, supplying OEM harnesses to Honda, Nissan, Mitsubishi, and Mazda. The FW-C series 2.3mm pitch connectors are used for ECU, body control module, and sensor wiring harness applications across a wide range of Japanese vehicle platforms.
The 12-pin configuration provides sufficient circuit density for complex sensor assemblies, body control modules, and multi-function actuator connectors while maintaining a compact housing footprint. The 2.3mm terminal pitch balances circuit density with current-carrying capacity — suitable for mixed signal and low-power circuits up to 5A per terminal.
Key Specifications
| Parameter | Value |
|---|---|
| Part Numbers | FW-C-12M-B (male) / FW-C-12F-B (female) |
| DJ Cross-Reference | DJ7121Y-2.3-11 (male) / DJ7121Y-2.3-21 (female) |
| Manufacturer | Furukawa Electric |
| Pin Count | 12-pin |
| Terminal Pitch | 2.3mm |
| Housing Color | Black |
| Sealing | Unsealed |
| Housing Material | PA66 glass-filled nylon |
| Terminal Material | Tin-plated copper alloy |
| Wire Range | 0.3–0.85mm² (22–18 AWG) |
| Current Rating | Up to 5A per terminal |
| Operating Temperature | -40°C to +85°C |
| Compatible Platforms | Honda, Nissan, Mitsubishi, Mazda (Furukawa harness) |
| Compliance | RoHS |
Furukawa FW-C Series — OEM Connector Standard
- Furukawa Electric OEM standard — Furukawa supplies wiring harnesses to Honda, Nissan, Mitsubishi, and Mazda; FW-C series connectors appear in ECU, BCM, instrument cluster, and sensor applications across these platforms
- 2.3mm pitch for mixed signal/power circuits — the 2.3mm terminal pitch is larger than the 0.6mm/1.0mm ECU signal pitch but smaller than the 6.3mm power pitch; ideal for mixed circuits combining sensor signals with low-power actuator outputs
- DJ series cross-reference — the DJ7121Y-2.3 designation allows cross-referencing with Chinese OEM parts catalogs and aftermarket suppliers; both FW-C and DJ designations refer to the same connector
- Positive latch retention — audible click confirms full engagement; resists accidental disconnection under vibration in ECU and BCM mounting locations
Typical Applications
- Honda / Nissan ECU and BCM connector repair
- Instrument cluster wiring harness replacement
- Multi-function sensor assembly connector repair
- Body control module wiring harness repair on Furukawa-harness vehicles
- Custom wiring harness fabrication for Japanese vehicle platforms
Frequently Asked Questions
Q: How do I identify if my vehicle uses Furukawa FW-C connectors?
Look for the Furukawa Electric logo or “FW” prefix on the connector housing. Furukawa connectors are common in Honda (Civic, Accord, CR-V, Jazz), Nissan (Qashqai, X-Trail, Micra), and Mitsubishi (Outlander, ASX, Lancer) vehicles. The connector housing may also be stamped with the DJ cross-reference number (DJ7121Y-2.3). If the part number is not visible, measure the terminal pitch — 2.3mm is noticeably larger than 1.5mm but smaller than 2.8mm.
Q: What is the difference between FW-C-12M-B and FW-C-12F-B?
FW-C-12M-B is the male plug — it has pin terminals that insert into the female socket. FW-C-12F-B is the female socket — it has socket terminals that accept the male pins. In a connector pair, the male plug connects to the wiring harness side and the female socket connects to the component (ECU, sensor, actuator) side — or vice versa depending on the specific application. Always verify the gender of your original connector before ordering.
Q: Can I use FW-C-12M-B and FW-C-12F-B as a matched pair for a custom wiring harness?
Yes — the FW-C-12M-B and FW-C-12F-B are a matched connector pair that mate together. They can be used to create a new 12-pin disconnect point in a custom wiring harness, add a service connector for easy component removal, or replace a damaged connector pair in an existing harness. Use 2.3mm Furukawa-compatible crimp terminals and a precision ratchet crimper for reliable terminal connections.
