Fasten Safety Belt Warning

When the left front seat belt is unbuckled, the inflatable restraint Sensing And Diagnostic Module (SDM) terminal 1 CKT 238 (BLK/WHT) is grounded by the left front seat belt switch. The SDM detects this input and sends a Class 2 serial data line message. The PZM receives this message. A Class 2 serial data line message is sent requesting that the IPC illuminate the fasten safety belt indicator. The PZM also sends a Class 2 message requesting that the IRC turn ON the slow chime.