Failure Conditions
WARNING: This page is about a different car, the 1995 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
A 1.8 MPH or greater decrease in non-drive wheel speed in 0.2 second. Transition in the extended travel brake contacts of TCC brake switch or stop/BTSI/cruise brake switch. No transition noticed in TCC contacts of TCC brake switch. Counter increments if these conditions are present. When counter reached 5, Code P090 sets.