Sumitomo Connector Information

This image shows the 6 pin variant of the Sumitomo HW-090 series connector series. The left connector is the male plug, and the right connector is the female socket.

The Sumitomo Connector is used to connect to the NTK L1H1 sensor. The sensor uses a male plug with 7 pins (it's really an 8 pin connector with one missing pin) and the connector we supply is the mating female socket.

Connector Kit Parts List

• Dark grey connector body
• White locking insert
• 10 female crimp terminals (7 required)
• 7 light grey wire seals (for small wires)
• 3 brown wire seals (for larger wires)
• 1 blanking plug

With the kit, you can use the 7 grey wire seals with 7 smaller diameter wires, or you can use two of the three larger brown seals with larger diameter wires (for the heater circuit). Either way, you should have a few spares should you mislay a couple of seals, or damage one of the terminals.

Here's an image of the back of the NTK L1H1 sensor's Sumitomo connector. It shows the 5 wires that come from the Vs/Ip cell (black, white & red) and the heater (yellow, orange). The squarish area at the top left of the connector houses the calibration resistor (Rcal) and the bottom right has a blanking plug in the eighth hole.

Here's how the sumitomo connector is wired to the DIY-WB.