Actron CP9175 OBD II AutoScanner - Manual (Page 59)

A-11
Traction Assist:
Assist in traction with brakes only.
TTS:
Transmission Temperature Sensor. A resistance sensor mounted in
the transmission housing in contact with the transmission fluid. It
sends a voltage signal to the PCM indicating the temperature of the
transmission.
VECI:
Vehicle Emission Control Information. A decal located in the engine
compartment containing information about the emission control
systems found on the vehicle. The VECI is the authoritative source for
determining whether a vehicle is OBD II compliant.
VIN:
Vehicle Identification Number. This is the factory-assigned vehicle
serial number. This number is stamped on a number of locations
throughout the vehicle, but the most prominent location is on top of the
dashboard on the driver’s side, visible from outside the car. The VIN
includes information about the car, including where it was built, body
and engine codes, options, and a sequential build number.
VSS:
Vehicle Speed Sensor. Sends a frequency signal to the PCM. The
frequency increases as the vehicle moves faster to give the PCM
vehicle speed information used to determine shift points, engine load,
and cruise control functions.
VTD:
Vehicle Theft Deterrent.
Warm-up Cycle:
Warm-up cycle is when the engine coolant temperature rises at least
40 degrees above that at engine start up.
WOT:
Wide-Open Throttle. The vehicle operating condition brought about
when the throttle is completely (or nearly) open. The PCM will typically
deliver extra fuel to the engine and de-energize the A/C compressor
at this time for acceleration purposes. The PCM uses a switch or the
Throttle Position Sensor to identify the WOT condition.