Shift Solenoid Valve - Mode B
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
Solenoid 2 signal fluid is routed to the shift solenoid valve - mode B and moves the valve against shift solenoid valve - mode B spring force to the applied position. This allows HL 12 clutch fluid pressure to exhaust through the valve into the backfill circuit. Also, HD 234 clutch/B cooling feed fluid replaces HD 234 clutch supply fluid, in order to feed the HD 234 clutch circuit and keep the hybrid direct, 2-3-4 clutch applied.