Definitions and Abbreviations. Chevrolet Beretta 1996

For 1990-2009 cars

### Noise Conditions

Drive Link Noise: A whine or growl that increases or fades with engine RPM. This noise is most noticeable under a light throttle acceleration, or in Park or Neutral with the car stationary.
Final Drive Nose: A hum related to car speed. This noise is most noticeable under a light throttle acceleration or zero throttle coastdown.
Planetary Gear Noise: A whine related to car speed. This noise is most noticeable in First gear, Second gear, Fourth gear, or Reverse. The condition becomes less noticeable after an upshift.
Pump Noise: A high pitched whine that increases with engine RPM and may be affected by modulated line pressure boost.
Torque Converter: A whine usually noticed when a vehicle is stopped and the transmission is in DRIVE or REVERSE. The noise will increase with the engine RPM. Refer to Torque Converter Evaluation for further information.

### Transmission Abbreviations

PCM: Powertrain Control Module
TCC Sol. Valve: Torque Converter Clutch Solenoid Valve
TP Sensor: Throttle Position Sensor
ECT Sensor: Engine Coolant Temperature Sensor
VSS Assy: Vehicle Speed Sensor Assembly
NC: Normally Closed
NO: Normally Open
WOT: Wide Open throttle
RPM: Revolutions Per Minute
PM: Permanent Magnet
A/C: Air Conditioning
MAP: Manifold Absolute Pressure
AC: Alternating Current
DC: Direct Current
MIL: Malfunction Indicator Light
DTC: Diagnostic Trouble Code
OBD: On Board Diagnostic
DLC: Diagnostic Link Connector
EGR: Exhaust Gas Recirculation
MPH: Mile Per Hour
Km/h: Kilometer Per Hour