Combined Instrument Panel

Combined instrument panel

Tachometer




The engine control module (ECM) (1) calculates engine speed based on signals from the engine speed (RPM) sensor (2). Engine speed (RPM) information is used for engine management. The engine control module (ECM) then sends a signal to the tachometer in the combined instrument panel (3) which provides the driver with information about engine speed.

Temperature gauge
The engine control module (ECM) calculates engine temperature based on signals from the engine coolant temperature (ECT) sensor (4). This information is used for engine management. The information is transmitted to the temperature gauge in the combined instrument panel.

Malfunction indicator lamp (MIL)
The malfunction indicator lamp (MIL) is controlled by the engine control module (ECM). The automatic transmission control module (TCM) can also request that the malfunction indicator lamp (MIL) lights.
The malfunction indicator lamp (MIL) lights when the ignition is switched on but the engine is not running. This indicates that the lamp itself is working.
The malfunction indicator lamp (MIL) lights when the engine control module (ECM) has detected an emission-related fault. The malfunction indicator lamp (MIL) goes out is the engine control module (ECM) senses that the fault has disappeared.