Transmission Range Sensor

DESCRIPTION
The 4R70W uses both the analog Transmission Range sensor (TR) and the Digital Transmission Range sensor (DTR). The most obvious difference is that the TR sensor has an eight pin connector and the DTR sensor has a twelve pin connector.

The processor sends a voltage signal to the Transmission Range (TR) sensor. The TR sensor incorporates a series of step-down resistors which act as a voltage divider. The processor monitors voltage which corresponds to the position of the gearshift lever and determines Electronic Pressure Control (EPC) pressure. The TR sensor also contains the PARK/NEUTRAL position, backup lamp circuits, and 4x4L neutral sense circuits.

SYMPTOMS
Engagement concerns, wrong gear, no shifts, increase in EPC pressure.

DTCs
P0707, P0708, P1705.