Navistar MaxxForce DT Diagnostic Manual page 196

DIAGNOSTIC MANUAL
Turbocharger
A turbine driven compressor mounted on the exhaust manifold. The turbocharger increases the pressure,
temperature and density of intake air to charge air.
Turbocharger 1 Turbine Outlet
Pressure (TC1TOP) sensor
A variable capacitance sensor that monitors exhaust back-pressure.
Turbocharger 2 Compressor
Inlet (TC2CIS) sensor
The TC2CIS sensor includes a thermistor sensor that monitors the temperature of charge air entering the
HP turbocharger. This sensor also monitors boost pressure for the LP turbocharger.
Turbocharger Wastegate
Control (TCWC) solenoid
Controls the TCWC actuator by regulating the amount of charge air pressure supplied to the TCWC
actuator. The TCWC solenoid is controlled by signals from the ECM in response to engine speed, required
fuel quantity, boost, exhaust back-pressure, and altitude.
Turbocharger 1 Wastegate
Control (TC1WC) solenoid
Controls the TC1WC actuator by regulating the amount of charge air pressure supplied to the TC1WC
actuator. The TC1WC solenoid is controlled by signals from the ECM in response to engine speed, required
fuel quantity, boost, exhaust back-pressure, and altitude. The TC1WC actuator is part of the turbocharger
assembly.
NOTE – TC1WC does not affect engine performance and is removed from postproduction engines.
Turbocharger 2 Wastegate
Control (TC2WC) solenoid
Controls the TC2WC actuator by regulating the amount of charge air pressure supplied to the wastegate
actuator. The TC2WC solenoid is controlled by signals from the ECM in response to engine speed, required
fuel quantity, boost, exhaust back-pressure, and altitude. The TC2WC actuator is part of the turbocharger
assembly.
Variable capacitance sensor
A variable capacitance sensor measures pressure. The pressure forces a ceramic material closer to a thin
metal disc in the sensor, changing the capacitance of the sensor.
Vehicle Speed Sensor (VSS)
Normally a magnetic pickup sensor mounted in the tailshaft housing of the transmission, used to indicate
ground speed.
Viscosity
The internal resistance to the flow of fluid.
Volt (v)
A unit of electromotive force that will move a current of one ampere through a resistance of one Ohm.
Voltage
Electrical potential expressed in volts.
192
https://www.truck-manuals.net/