Selector lever position
The TCM continuously transmits information on the bus indicating the selected "SELECTOR LEVER POSITION " with value P, R, N, D, M, L" or respectively P, R, N, D, 4, 3, L (D223L), the value being used by both the engine control system and the MIU.
If a selector lever position other than P or N is selected, the requested air mass/combustion will be increased to compensate for the imminent load increase. This is to compensate fully for the automatic transmission's increased torque requirement and avoid a reduction in idling speed before idle speed control compensation has had time to take effect.
The main instrument unit uses "SELECTOR LEVER POSITION " information to light up the relevant segment in the selector lever position indicator.
When position M is selected the main instrument panel indicates gear position 1-5, in accordance with what the driver requested with the gear change buttons on the steering wheel.