Test Conditions

Codes P031, P032, P034, P071 and P090 not set. One second has passed since TCC brake switch was cycled from closed to open. MAP value at 30 kPa or greater (engine not at idle) for one second. Failure counter will increment when all these conditions are present and brake booster vacuum signal is 82 kPa or greater. Failure counter will reset when all these conditions are present but vacuum signal is less than 82 kPa.