Electrical Control System

Fig 1: Identifying Electrical Control System Components

Courtesy of FORD MOTOR CO.

Electrical components function:

• Input shaft speed sensor 1 measures the input speed and the rotating direction of the input shaft 1. The input shaft can be stationary.
• Input shaft speed sensor 2 measures the input speed of the input shaft 2. The rotation direction is not measured.
• OSS  sensor measures the input speed of the output shaft. The rotation direction is not measured.
• Two electrically clutch motors are used to actuate the double clutch in the transmission - one motor for one clutch. The motors work independently of each other. When the clutch is fully closed, the clutch motor provides the holding torque in addition with spring force. The clutch motors work against a clutch spring and in the disengaged case reach the 0-position (rest position) with the spring force.
• TR  sensor detects the angular position of the shift lever shaft.
• TCM  is an assembly of an electronic module, sensors, and electrical actuators. It combines a TCM  and two electric motors for the gear shifting. Primary function of the TCM  is to collect the needed incoming data signals for the transmission control, perform the interpretation of incoming data signals, communication with the periphery and connect the electrical and mechanical contact to the signal transmitter and actuating element.
• The externally mounted wiring harness is the vehicle and transaxle interface. The wiring harness uses 2 connectors to connect the transaxle to the vehicle wiring harness. The transaxle connector plug is situated at the TCM  and is the electrical connection to the clutch actuators and the sensors to the TCM  . The vehicle wiring harness connector is situated on the TCM  and is the electrical connection between TCM  and the vehicle.