System Overview: Components
The following components are included in the automatic transmission control system:
- Transmission control module (TCM) - Controls activation/deactivation of the solenoids by means of processing the input signals from the transmission speed, rpm and temperature sensors. Also stores adaptive data and diagnostic trouble codes and frozen values for diagnostics.
- Gear position sensor, integrated with transmission control module (TCM) - Provides transmission control module (TCM) information on selected gear position.
- Solenoid, S1 - OFF/ON solenoid, used for certain shifting.
- Solenoid, S2 - OFF/ON solenoid, used for certain shifting as well as controls the engine brake in 1st gear.
- Lock-up solenoid, SLU - Controls the lock-up function and also used with certain gearshifts.
- Linear pressure solenoid, SLT - Controls transmission system pressure.
- Linear pressure solenoid, SLC1 - Controls transmission gearshift pressure and also used with certain gearshifts.
- Linear pressure solenoid, SLC2 - Controls transmission shift pressure. Also used with certain shifts.
- Linear pressure solenoid, SLC3 - Controls transmission shift pressure. Also used with certain shifts.
- Linear pressure solenoid, SLB1 - Controls transmission gearshift pressure and also used with certain gearshifts.
- Speed sensor, input shaft (1) - Provides transmission control module (TCM) information on input shaft speed from the engine.
- Speed sensor, output shaft (2) - Provides transmission control module (TCM) information on output shaft speed from the transmission.
- Oil temperature sensor (3) - Provides transmission control module (TCM) information on transmission oil temperature.
- Gear selector module (GSM) - Provides transmission control module (TCM) information such as Geartronic mode.