Circuit Description
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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 to allow four different shifting combinations.
When the PCM detects a 1-1-4-4 gear ratio, then DTC P0752 sets. DTC P0752 is a type "C" DTC. For California emissions vehicles DTC P0752 is a type "B" DTC.