LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2016 >> ELR >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission - 4ET55 (MKD) - Description And Operation >> Description and Operation >> Electronic Component Description >> A/Trans Manual Shift Shaft Position Switch Assembly
April 5, 2026: LEMON Manuals is launched! Read the announcement.

A/Trans Manual Shift Shaft Position Switch Assembly

Fig 1: Automatic Transmission Manual Shaft Position Switch Assembly
GM2128730Courtesy of GENERAL MOTORS COMPANY

The A/Trans manual shift shaft position switch assembly is a dual sliding hall-effect switch attached to the control valve body within the transmission. The 9 outputs from the switch indicate which position is selected by the transmission manual shaft. Four outputs (A, B, C, P), are range selection inputs to the transmission control module. The five (R1, R2, D1, D2, S) direction selection inputs to the hybrid/EV powertrain control module 1 through the transmission X175 24-way connector. The input voltage at the modules is high when the switch is open and low when the switch is closed. The state of each input is displayed on the scan tool as Internal Mode Switch Range and Internal Mode Switch 2. The Internal Mode Switch Range input parameters represented are transmission range signal A, signal B, signal C and signal P. The Internal Mode Switch 2 parameters represented are transmission direction signal R1, signal R2, signal D1, signal D2 and signal S.