Trying to start on a slippery (snowy or icy) road can cause wheels to slip, making the vehicle unstable and spin out of control or not take off at all.
The Traction Control System (TCS) helps the vehicle start in a stable way by monitoring wheels with wheel sensors, analyzing them an Electronic Control Unit (ECU) and automatically controlling drive wheel braking force and engine output with a modulator. Nissin began making 30,000 two-channel (two drive-wheel control) TCS units (NK1T) per month in June 1998. Since then Nissin developed the NK11T TCS, a four-channel type that can work with front-wheel drive, rear-wheel drive and four-wheel drive systems. It is the first system in the world with a built-in pressure sensor. With newly developed miniature solenoid valves, it is 28% lighter than Nissin’s previous TCS (NK1T). Nissin's current version TCS is the NK21.