Pressure-hold Test
WARNING: This page is about a different car, the 1991 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
This test activates selected wheel circuit valves in the modulator valve by placing valve in pressure-hold position. Valve action can be verified by checking appropriate wheel for braking action. The TECH 1 will indicate whether valve operated correctly. To perform pressure hold test, raise and support vehicle. Spin wheel freely. Use TECH 1 to command the PRESSURE HOLD mode. Have assistant apply brakes. Try to spin the wheel being tested. Wheel should spin, even with brakes applied, due to the hold command.