Circuit Description

WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 GMC Sierra, 2002 Chevrolet Suburban, and 2002 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The 1-2 shift solenoid valve controls the fluid flow action on the 1-2 and the 3-4 shift valves. The 1-2 shift solenoid valve is a normally-open exhaust valve that is used with the 2-3 shift solenoid valve to allow for 4 different shifting combinations. The 1-2 shift solenoid valve attaches to the control valve body within the transmission. The ignition voltage goes directly to the 1-2 shift solenoid valve. The PCM controls the 1-2 shift solenoid valve by providing the ground path through the 1-2 shift solenoid valve control circuit.

When the PCM detects a continuous open or short in the 1-2 shift solenoid valve circuit or the 1-2 shift solenoid valve, then DTC P0753 sets. For California emissions vehicles and vehicles under 8600 GVW, DTC P0753 is a type "A" DTC. For all other vehicles, DTC P0753 is a type "C" DTC.