TOYOTA Computer Control System (TCCS)

Toyota Computer Control System (TCCS) is a computerized emission, ignition and fuel injection control system. TCCS lowers exhaust emissions while maintaining good fuel economy and driveability.

An Electronic Control Unit (ECU) governs TCCS based on input signals received from various input devices. ECU contains preprogrammed data to maintain optimum engine performance under all operating conditions.

ECU is also equipped with a self-diagnostic function. Trouble codes are set by the malfunction of engine sensors or circuits and stored in the ECU memory. A CHECK ENGINE light on the instrument panel will come on if a trouble code is stored.