Note. For circuit identification, see CONNECTOR IDENTIFICATION and WIRING DIAGRAMS .
Circuit Description
The 1-2 shift solenoid valve is used to control fluid flow acting on 1-2 and 3-4 shift valves. Solenoid is a normally open exhaust valve used in conjunction with 2-3 shift solenoid valve to allow 4 different shifting combinations. See SHIFT SOLENOID COMBINATIONS & GEAR RATIO table. Solenoid is attached to control valve body. Ignition voltage is supplied directly to solenoid through fused circuit. PCM commands solenoid on or off through ground circuit. DTC P0753 is set if PCM detects a continuous open, short to ground or short to voltage in 1-2 shift solenoid circuit.