Diagnostic System

The ECU of the TCCS is equipped with a self-diagnostic system which detects system failures or abnormalities. When a malfunction occurs, the ECU lights the "CHECK ENGINE" light located on instrument panel. If vehicle is equipped Super Monitor Display, the diagnostic codes will be shown on display screen.

By analyzing various signals, the ECU detects system malfunctions which are related to various operating parameter sensors. The ECU stores failure codes associated with the detected failure until the diagnosis system is cleared. Clear the diagnosis system by removing the "EFI" fuse with ignition switch in the "OFF" position.

The "CHECK ENGINE" warning light on instrument panel informs driver that a malfunction has been detected. The light goes out automatically when malfunction has been cleared.