Selector Lever Position Indicator

Selector Lever Position Indicator












On cars with automatic transmission, the selector lever position indicator shows which gear is selected by lighting up the corresponding gear symbol.
The selector lever indicator consists of 7 segments each with an LED next to the symbol concerned (PRND43L). The symbols are illuminated by other LEDs, where the light intensity is controlled by the rheostat level.

The LEDs are powered from the main instrument unit and grounded internally by the main instrument unit. TCM continuously sends bus information on the status of all selector lever positions, unit ON/OFF.

Example
When the selector lever is in position P, the following information is sent:







The main instrument unit control module grounds the output of the LED for symbol P, which then lights up. The other symbols remain off. If another selector lever position is engaged, the status of the bus information will change. The previously lit symbol will go out and the symbol for the new selector lever position will light up.

Diagnostics
The function has its own diagnostics in the sending system.