Problem Description: Started with a airbag light and then found a leaking trunk. There was plenty of water around the battery and corrosion. Cleaned all connections in the trunk including the fuse box and airbag electrical connector. Airbag light was reset by using INPA and the car ran fine again for a few weeks. After this time thought the engine light came on and the car overheated. It also had a smoking & burnt serpentine belt. Over several weeks I have checked and replaced all items driven by the serpentine belt including the supercharger, water pump, aircond compressor, tensioner & idler pulleys, and yesterday replaced the alternator. What I have since determined is that after the car is running for sometime the alternator pulley stops turning (locks) and the serpentine belt slips on the alternator pulley causing the belt to heat up. I am getting a Sensor Fault on INPA which seems associated with High Battery Voltage (VBATT) and either an open or short circuit. See attached. The airbag light is coming back on with INPA error 11 & 80. Today I checked the Battery Safety Terminal and swapped the battery for a known good battery. The problem remains and I am running out of ideas. Anyone else experienced a similar issue???

 

How's the harmonic balancer? Didn't see that you replaced that or was the replaced previously?

 

Yes I believe that the Harmonic Balancer is the likely cause. I am waiting on a new part before I take off the old one.