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Home >> Cadillac >> 2009 >> Escalade Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Automatic Transmission - 2ML70 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Power Off Low Default >> Hybrid Low, 1-2 Clutch Remains Applied >> Hybrid Low, 1-2 Clutch Boost Valve

Hybrid Low, 1-2 Clutch Boost Valve

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PCS 3 signal fluid pressure acts on a differential area of the hybrid low, 1-2 clutch boost valve, moving the valve against hybrid low, 1-2 clutch boost valve spring force to block HL 12 clutch/4th clutch feed fluid from entering the HL 12 clutch/4th clutch feedback circuit, and opening the HL 12 clutch/4th clutch feedback circuit to exhaust. This results in the hybrid low, 1-2 clutch regulator valve moving to the full feed position, sending full HL 12 clutch/4th clutch feed pressure (full line pressure) to the hybrid low, 1-2 clutch.