Patent ID: 8113988

Claim:
A hydraulic control module for a vehicle transmission having a plurality of torque transmitting devices, the hydraulic control module comprising: a controller; a first trim valve in fluid communication with a first of the plurality of torque transmitting devices and configured to selectively actuate the same; a second trim valve in fluid communication with a second of the plurality of torque transmitting devices and configured to selectively actuate the same; a first pressure switch in fluid communication with said first trim valve and in operative communication with said controller, wherein said first pressure switch is configured to monitor whether said first trim valve is in an engaged or disengaged state and transmit signals indicative thereof to said controller; a second pressure switch in fluid communication with said second trim valve and in operative communication with said controller, wherein said second pressure switch is configured to monitor whether said second trim valve is in an engaged or disengaged state and transmit signals indicative thereof to said controller; and a first blocking valve in fluid communication with said first and second trim valves and said first and second pressure switches; wherein said controller is operable to detect if at least one of said first and second pressure switches unintentionally toggles; and wherein said controller is operable to shift the transmission to a safe operating mode in response to said at least one of said first and second pressure switches unintentionally toggling.