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This paper concerns research on an emission control system aimed at reducing emission levels to well below the ULEV standards. As emission levels are further reduced in the coming years, it is projected that measurement error will increase substantially. Therefore, an analysis was made of the conventional measurement system, which revealed the following major problems. 1. The conventional analyzer, having a minimum full-scale THC range of 10 ppmC, cannot measure lower concentration emissions with high accuracy. 2. Hydrocarbons are produced in various components of the measurement system, increasing measurement error. 3. Even if an analyzer with a minimum full-scale THC range of 1 ppmC is used in an effort to measure low concentrations, the 1 ppmC measurement range cannot be applied when the dilution air contains a high THC concentration. This makes it impossible to obtain highly accurate measurements. 4.

This study introduces the most recent version of the Toyota Electro-Multivision system which was equipped on the 1991 Soarer. As in the previous version, the Electro-Multivision is operated and controlled by interactive inputs through touch-activated display panel switches. The key features of the system are its use of the state-of-the art 5.9-inch thin film transistor (TFT) LCD and four improved navigation functions. The new navigation-related functions are as follows: 1. Two CD-ROM disks incorporating map data on major cities (Scale: 10,000 to 1). 2. Touch activated panel display of maps that can be scrolled with the touch of a finger. 3. A location function that works off a global positioning system (GPS) and map matching. 4. Route Guidance from the present position to a target destination.