Brief description of main instrument unit, Trionic T7: General

The main instrument unit conveys information to the driver and functions as an information link between the P-bus and the I-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 gauge (cars with turbocharger)
• Selector lever position indicator (cars with automatic transmission)
• Instrument and display lighting
• Warning and indicator lamps