Vehicle Buffered Power (VBPWR)

The VBPWR is a PCM supplied voltage source that supplies regulated voltage (10.5 to 14 volts) to vehicle sensors that run off 12 volts but cannot withstand VPWR voltage variations. It is regulated to VPWR plus or minus 1.5 volts and voltage is limited to protect the sensors. Typically, these sensors will operate properly as long as the voltage supplied to them is greater than 10.5 volts. Although primarily used on engine sensors, in some instances it can also be used by transmission related sensors. To determine if this reference voltage is shared with a transmission sensor Refer to: DESCRIPTION AND OPERATION