October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

By-Pass Air Control (BAC) Valve

BAC valve is located under throttle body. Remove BAC valve. Circulate cold water in BAC valve coolant input hose to cool valve. Circulate hot water in BAC valve coolant input hose and ensure air valve operates. Replace BAC valve as necessary.

Fig 1: Identifying BAC Valve (Similar)

Courtesy of MAZDA MOTORS CORP.