Transmission Fluid Pressure Accumulator Solenoid Valve - If Equipped
WARNING: This page is about a different car, the 2016 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The Transmission Fluid Pressure Accumulator Solenoid Valve is part of the Stop/Start system on the vehicle. The automatic transmission auxiliary fluid accumulator is used to supply transmission fluid line pressure to the appropriate clutches for an auto start event. Attached to the accumulator is a normally closed ON/OFF solenoid. When the ignition is ON, the engine control ignition relay supplies 12 V to the accumulator solenoid. To complete the circuit, the engine control module (ECM) supplies a control circuit to the accumulator solenoid. When the ECM requests an auto start event, the solenoid is commanded ON, allowing captured pressurized fluid to exit the accumulator to apply the clutches for a 1st gear start.