Brief description of the main instrument unit: General

The purpose of the main instrument unit is to provide the driver with information and also to serve as a communications link between components/control modules connected to a bus and components/control module not connected to a bus.

The main instrument unit has its own diagnostics function and sets a diagnostic trouble code when a fault occurs.

The main instrument unit incorporates the following functions:

• Control module
• Speedometer
• Odometer/trip meter
• Tachometer
• Fuel gauge
• Coolant temperature gauge
• Turbo pressure gauge (cars with turbo)
• Selector lever position indicator (cars with automatic transmission)
• Instrument and display lighting
• Warning and indicator lamps