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Engine and Emission Control System Description
The engine and emission control system is divided into 4 major sub-systems: air intake system, fuel delivery system,
electronic control system and emission control system.
Air intake system includes air cleaner, throttle body, IAC valve and intake manifold.
Fuel delivery system includes fuel pump, delivery pipe, etc.
Electronic control system includes ECM, various sensors and controlled devices.
Emission control system includes EGR, EVAP and PCV system.
CAN Communication System Description
ECM (2), TCM (equipped with A/T) (1), BCM (3) and combination meter (4) of this vehicle communicate control data
between each control module.
Communication of each control module is established by CAN (Controller Area Network) communication system.
1
C34-17
C34-7
CAN communication system uses the serial communication in which data is transmitted at a high speed. It uses a
twisted pair of two communication lines for the high-speed data transmission. As one of its characteristics, multiple
control modules can communicate simultaneously. In addition, it has a function to detect a communication error
automatically. Each module reads necessary data from the received data and transmits data. ECM communicates
control data with each control module as follows.
ECM Transmission Data
ECM
2
C37-13
C37-12
E23-3
E23-18
Engine torque driver
requested
Engine speed
Top gear inhibit
Torque converter clutch
control inhibit
Lock up / slip control
inhibit signal
Throttle position
Immobilizer indication
Transmit
DATA
Engine emissions
related malfunction
Vehicle speed
Engine coolant
temperature
Fuel level percent
Brake pedal switch
active
A/C refrigerant pressure
Distance kilometers per
liter of fuel
Stand by to engage air
conditioning compressor
clutch
Engine General Information and Diagnosis:
3
G37-4
G37-2
E46-1
E46-2
Combination
TCM
BCM
1A-5
S4RS0A1101004
S4RS0A1101008
4
G28-10
G28-8
I4RS0A110085-
Meter
I4RS0A110003-
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