Volvo B6324S, Функциональное описание

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5
Input signals
Component Purpose
A/C Linear high Pressure Sen-
sors
Provides information using a linear signal about any pressure changes on the high-
pressure side of the A/C system. not used by emission related functions.
Accelerator Pedal
Senses the accelerator pedal position. The signal is used by the ECM. The pedal is
designed with two independent signals, one with analogue and one with digital output
(Pulse Width Modulated – PWM).
Alternator, LIn (bus)
Exchange of information between the Engine Control Module (ECM) and the other
units occurs as well with the use of LIn (Local Interconnect network) serial communi-
cation. not used by emission related functions.
Ambient temperature sensor Provides information about ambient air temperature. The signal is used by the ECM.
Brake light switch
Informs Engine Control Module (ECM) that the car is braking. not used by emission
related functions.
Camshaft sensor, inlet/outlet Provides the ECM information about the engine working cycle.
Coolant Level Switch not EuCD Indicates low level in coolant water, the switch is open when the level is low.
CAn (bus)
Reading out fault codes. Exchange of information between the ECM and the following
units: CEM, BCM, TCM, Steering Angle Sensor (SAS), Differential Electronic Module
(DEM) and Diagnostic Connector.
Engine Coolant Temp Sensor
To detect coolant temperature, which makes it necessary for the ECM to correct fuel
injection.
Flywheel/Crank Sensor Provides the ECM information about the crankshaft position and engine speed
Fuel Pressure/Temp. Sensor To measure the fuel pressure and fuel temperature.
heated Oxygen Sensors Front,
uhEGO (One sensor for each
bank)
uhEGO linear oxygen sensor detects oxygen concentration in the exhaus
gas. (universal hEGO)
heated Oxygen Sensors, hEGO
(One sensor for each bank)
Detection of lambda = 1, where the catalyst function is optimal.
Ignition Switch Ignition starts the ECM)
knock sensors (One sensor for
each bank)
To detect harmful knocking combustions in the engine.
MAF Sensor
Provides information about the quantity of air mass passing through into the engine,
mainly under normal driving conditions.
MAP Sensor
Provides information, about the engine load at rapid load changes, to the engine con-
trol unit.
Oil Quality Sensor
Provides information to the engine control unit, which will determine when to inform
the driver about needed oil top-ups or required service. not used by emission related
functions.
Starter Switch Starter switch activates the output for starter motor by the ECM
Wake up Switch Wake up starts the ECM