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8) CAN Configuration (P-CAN/B-CAN)
(1) CAN Configuration (P-CAN/B-CAN)
Name Function
ECUElectronic Control Unit
TCUTransmission Control Unit
EPSElectronic Power Steering Unit
BCMBody Control Moudule
SKMSmart Key Moudule
CAN system communicates with the system units in vehicle. It consists of P-CAN and B-CAN according
to the communication speed.
P-CAN & B-CAN: SKM, Instrument cluster, BCM, Disgnostic connector
P-CAN: ECU, ABS & ESP, TCU, E-coupling, EPS unit
Terminal resistance: installed on ECU and BCM
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(2) Wiring Connection of CAN Communication
Splice pack Wiring Location
S101 Floor wiring (LH)Under fuse & relay box in engine
compartment
S102 Floor wiring (RH) Inside of right fender
S201 Main wiringBehind instrument cluster (cowl cross
member)
S202 Main wiringBehind instrument cluster (cowl cross
member)
S205 Floor wiring (LH)
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1. LAYOUT
D20DTF(Low CO2) D20DTF
ECUBattery sensor (EBS)
Alternator (ALT)
Meter cluster (charge
warning lamp)
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Operation of charge warning lamp
ECU checks the generating voltage from alternator and circuit conditions and sends the warning lamp ON
signal to meter cluster through CAN line.Basic control logic according to the driving conditions
Engine ECU determines the engine loads according to the fuel injection volume and engine speed. It
charges the battery by increasing the generating voltage during deceleration. To improve the fuel
economy by reducing the alternator load during acceleration, engine ECU decreases the generating
voltage and consumes the battery voltage.
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3. CAN COMMUNICATION (Charge Warning Lamp)
Overview
Meter cluster
(charge warning lamp)
The meter cluster receives the charge warning lamp ON signal from ECU through CAN line.
Charge warning lamp ON conditions
Pre-warning
When DTC related EEM set
Open or short circuit in alternator -
-
-
Circuit diagram
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5. CAN COMMUNICATION CONFIGURATION
The CAN topology is linked with CAN communication system, which consists of P-CAN and B-CAN.
The instrument cluster and BCM (Body Control Module) communicate through both P-CAN and B-CAN
at the same time, and the SKM (SMART Key Module) communicates with the instrument cluster and
BCM through B-CAN.
1) CAN Configurations (P-CAN/B-CAN)
Abbreviations Meaning Function
GCU Glow Control Unit Glow Control Unit
EPS Electronic Power Steering Unit Electronic Power Steering Unit
BCM Body Control Module Body Control Module
SKM Smart Key Module Smart Key Module
TPMS Tire Pressure Monitering System Tire Pressure Monitering System
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2) CAN Communication Wiring Diagram
Splice pack Wiring Location
S101 W/H Floor (LH) Glow Control Unit
S102 W/H Floor (RH) Inside RH Fender
S202 W/H Main Backside Cluster (LH Cowl Cross Member)
S204 W/H Main Backside Cluster (Under ICM Relay Box)
S205 W/H Main Backside Audio (CTR Cowl Cross Member)
S206 W/H Floor (LH) Under Driver Seat
S401 W/H Floor (LH) Beside PAS Unit (inside LH QTR Trim)
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ICM box
Interior fuse boxEngine compartment
fuse box
The fuse and relay boxes in this vehicle are mounted on the engine compartment, left side of the
instrument panel and rear of the instrument cluster (3 off in total). The capacities and its names for each
fuse and relay are marked on the each fuse and relay box cover.
The label attached on each fuse box indicates only major fuses and relays. For detailed information, see
the power distribution circuit diagram.
1. OVERVIEW
2. SYSTEM LAYOUT