Just did one today...... and NO... I didn't use the scan tool. Comp didn't come on, front of clutch pulley was missing paint (hot), grabbed my dvom and since the connector is right there in front of your face ohmed it out and just as I thought, open. Installed a new compressor. We live in the desert, it's hotter-n-L, no way I'd risk installing an clutch coil only unless the customer signed a waiver stating that is what they wanted. Due to the heat involved when the coil bakes the front seal often will leak and create a "comeback".