Circuit Description
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
The transmission control module (TCM) provides voltage to the pressure control solenoid, the shift solenoids, and the torque converter clutch pulse width modulated (TCC PWM) solenoid through 2 separate solid-state devices called high side drivers (HSD) - HSD1 and HSD2. HSD1 provides electrical power to the pressure control solenoid. HSD2 provides power to the shift solenoids and the TCC PWM solenoid. A normal function of the TCM is to run tests on each driver to ensure that it is functioning properly.
When the TCM detects an open or a short to ground on HSD2, DTC P1833 sets. DTC P1833 is a type A DTC.