Motorcraft Home Technical Resources Home Non-Subscription Resources What's New Body Repair Manuals Diagnostic Tool Support OBDII Theory & Operation Paper/CD Manuals Quick Guides Tools & Equipment Membership Accounts My Shopping Cart Subscription Products Keycode Lookup Reprogramming & Initialization Service Publications Technical Service Bulletins Technical Training Purchase Subscription Ford Specific Acronyms # A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  0-9  (Indexed by Abbreviation) Acronyms Description BARO Barometric Pressure Base Idle Idle RPM determined by the throttle lever hardset on the throttle body. Base Timing Spark advance in degrees before top dead center of the base engine without any control from the PCM. BATTEMP Battery Temperature Battery Positive Vol The positive (+) voltage from the battery or any circuit connected directly to the battery. BJB Battery Junction Box BOB Breakout Box. A test device which connects in series to the PCM and PCM harness. BPA Brake Pedal Applied. Typically located on the braking system master cylinder. Can be hydraulic or electric. BPP Brake Pedal Position BPS Brake Pedal Switch/Speed Control Deactivation. BTDC Before Top Dead Center. The location of the piston before it has reached the top of its stroke. Measured in degrees of crankshaft rotation. Bus + or Bus - Multiplex circuits that carry standard corporate protocol (SCP) or controller area network (CAN) data from module to module and to the data link connector (DLC). BVREF Buffer Voltage Reference. A dedicated circuit that provides approximately a 5.0 volt signal used as a reference by certain sensors.

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