F 250 4WD Super Duty V10-6.8L VIN S (2001)
AWD: All-Wheel Drive.
BARO: Barometric Pressure.
Base Idle: Idle rpm determined by the throttle lever hardset on the throttle body with the IAC solenoid disconnected.
Base Timing: Spark advance in degrees before top dead center of the base engine without any control from the PCM or ICM.
Battery Positive Voltage (B+): The positive (+) voltage from the battery or any circuit connected directly to the battery. Compare "Vehicle Power
(VPWR)."
BAT TEMP: Battery Temperature.
BJB: Battery Junction Box.
BOB: Breakout Box. A test device which connects in series to the PCM and PCM harness.
BPA: Brake Pedal Applied switch. Typically located on the braking system master cylinder. Can be hydraulic or electric.
BPP: Brake Pedal Position. Indicates the position of the brake pedal, based on input from the Brake Pedal Position (BPP) switch.
BRAKE LMP or BRKL: Brake Warning Lamp Status. Activates the Brake Warning Lamp by applying voltage to the control line.
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) data from module to module and to the DLC.
CAC: Charge Air Cooler. Formerly known as Intercooler. A device which lowers the temperature of pressurized intake air.
CAFE: Corporate Average Fuel Economy. A set of federal requirements and regulations which govern fuel economy standards.
CANVNT: Canister Vent Solenoid.
Catalyst: Catalytic converter. An in-line exhaust system device used to reduce the level of engine exhaust emissions.
CAT EVAL: Catalyst System Evaluated. This item indicates YES when the Catalyst Efficiency Monitor has successfully completed.
CCM: Comprehensive Component Monitor.
CCRM: Constant Control Relay Module. A relay module that provides ON-OFF control of various EEC components.
CD A through J: Coil Driver 1 through 10.
Centralized Testing Facility: State government operation. Provides Inspection/Maintenance (IM) and safety inspections.
CGND or CSE GND: Case Ground. Provides a ground source for the PCM or ECU case.
CHT: Cylinder Head Temperature. Units are displayed in either degrees Fahrenheit or Centigrade.
CHTIL: Cylinder Head Temperature Indicator Lamp.
CHTV: Cylinder Head Temperature Voltage. The actual voltage drop across the CHT sensor thermistor.
CID: Cylinder Identification. PCM input signal from Camshaft Position Sensor.
CKP: Crankshaft Position. Senses the position of the crankshaft.
CKP+, CKP-: CKP+ is the Crankshaft Position (CKP) sensor signal wire. CKP - is the signal return.
CL: Closed Loop. An operating condition or mode which enables operation based on sensor feedback.
CMP: Camshaft Position. Indicates camshaft position.
CMPFM: Camshaft Position Failure Mode. Indicates when the PCM identifies a CID/CMP fault.
