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Smart key
slot
Smart key
Start motor
Meter
cluster
BCM
SKMD20DTF
ECU
c. Components for immobilizer with Smart key system
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3) Input/Output for CAN communication
(1) Configuration of CAN (P-CAN/B-CAN)
CAN Topology communicate with system units. There are two types (P-CAN and B-CAN) of
communication according to the communication speed. Instrument cluster, BCM and diagnostic
connector use both types of communication. And, ECU, ABS & ESP, TCU, GCU, E-coupling and EPS
unit use P-CAN communication because it is faster than B-CAN. The terminal resistances are installed in
ECU and BCM.
Abbreviation Function
GCU Glow Control Unit
EPS Electronic Power Steering Unit
BCM Body Control Module
SKM Smart Key Module
TPMS Tire Pressure Monitering System
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0000-00
(2) CAN communication flow chart
Splice pack Wiring harness Location
S101 W/H Floor(LH) Glow Control Unit
S102 W/H Floor(RH) Inside RH Fender
S202 Main wiring Backside Cluster(LH Cowl Cross Member)
S204 Main wiring Backside Cluster(Upper 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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1452-01
Maintenance
If the charge warning lamp ( ) on the instrument cluster comes on while driving, there is a malfunction
in the charge system including the battery. Therefore, carrying out the system check is needed.
Make sure that the battery cables are firmly connected.
If the terminals are corroded, clean them with a wire brush or sandpapers.
Always disconnect the battery cables with the ignition key removed. When disconnecting the battery
cables with the ignition key turned to ON or ACC position, several electric units can be damaged due
to sudden voltage change.
Check the battery for crack, damage or fluid leaks. Replace it if necessary.
Wipe out the battery fluid on the battery surface using a rubber glove and a clean cloth wetted with
soapy water. -
-
-
-
-
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8530-00
5) ECO Cruise Control
ECO cruise is ready and ECO cruise indicator on the instrument cluster comes on when pushing down
the cruise control lever. To activate the ECO cruise mode, push down the cruise control lever again. To
cancel the ECO cruise mode while in operation, push down the cruise control lever again. The ECO
cruise mode is canceled and the indicator goes out.
What is ECO Cruise mode?
In this mode, the smooth acceleration to the set cruise speed can be achieved by optimized fuel
consumption.
Page 561 of 1336
0000-00
Rear oxygen
sensor
2) Components for ECU Input
Coolant temperature
sensorCamshaft position
sensorCrankshaft position
sensor
Front oxygen sensor
Knock sensor
G20DF Engine ECUElectronic throttle
body
Refrigerant pressure sensor
Clutch pedal signal
Blower switch signal
Brake pedal signal
CAN
ABS & ESP
Instrument cluster
TCU -
-
-
Oil pressure
switchOil pressure warning lamp
T-MAP sensor
Page 562 of 1336
A/C compressorOCV (Oil Control Valve)
3) Components for ECU Output
Start motorInjector
VIS solenoid valve
Purge control solenoid
valve
G20DF Engine ECUIgnition coil
CAN
ABS & ESP unit
BCM
E-coupling unit
EPS
Instrument cluster
SKM
TCU
Diagnostic tool -
-
-
-
-
-
-
-
Cooling fan
module
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0000-00
7) Immobilizer Control
(1) Overview
The Immobilizer System provides an additional theft deterrent to the vehicle in which it is installed and
prevents it from being started by unauthorized persons. The transponder integrated in the key and the
engine control unit have the same code. When the ignition key with the integrated transponder is turned
to the ON position, the ECU (Engine Control Unit) checks the crypto code of the key and, if correct,
allows the vehicle to start the engine.
For details, refer to Chapter "BCM".
(2) Components
Conditions for cooling fan
Immobilizer
antenna
Immobilizer
key
Start motor
Instrument
cluster
BCM
G20DF ECU