start stop button SSANGYONG KORANDO 2013 Service Manual

2. OPERATING PROCESS
1) System Layout
(1) Engine start
SKM performs the authentication process for the SMART key and sends the engine start request to
EMS if there is a normally coded SMART key when pressing the Engine Start/Stop button with the
SKM sends the start request signal to PCAN network and the cranking request to BCAN network by
button.
SKM turns off the IGN2/ACC relay during cranking to shut down the electric loads.
SKM receives the starting status signal from EMS throug PCAN.
EMS starts to crank the engine after checking the pre-heating condition if it receives the engine
cranking request 1 when pressing the Engine Start/Stop button. EMS starts to crank the engine
immediately if it receives the engine cranking request 2 when pressing the Engine Start/Stop button. 1.
2.
3.
4.
5.
6.
Engine cranking request 1: when pressing the Engine Start/Stop button shortly in normal
conditions
Engine cranking request 2: when pressing the Engine Start/Stop button again after first press or
when pressing the Engine Start/Stp button for more than 3 seconds -
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Engine start during driving 7.
When pressing the Engine Start/Stop button with IGN ON, the engine start is requested if the
the brake switch is ON (no need authentication for 30 seconds).
When pressing the Engine Start/Stop button with IGN ON, the engine start is requested
position (no need authentication for 30 seconds).
Except input of brake switch signal
In vehicle equipped with A/T, when pressing the Engine Start/Stop button for more than 10
seconds with ACC ON, the engine start is requested regardless of brake signal if the gear shift
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0000-00
Key approval process in Smart key system equipped vehicle
The key approval consists of two processes; immobilizer key approval and Smart key
approval.
Immobilizer key approval: When inserting the Smart key into Smart key slot, the power is supplied to the
key slot. SKM communicate with the Smart key in key slot to check if it has valid crypto code. If it is valid,
ECU start to control the engine when pressing the Engine Start/Stop button. The system has 10
seconds of valid time-out period. If the engine does not start in this period, the key approval process
should be done again.
Smart key approval: When pressing the Engine Start/Stop button or depressing the brake pedal without
Smart key inserted into the key slot, SKM communicate with the Smart key to check if it has valid crypto
code. If it is valid, the engine can be started.

Smart key
Wireless communication with
SKM system by receiving LF
(Low frequency) and
transmitting RF (Radio
frequency)Emergency slot
For emergency use to
start the engine when
the smart key battery has
been discharged.
SKM
Wireless communication with other
modules through B-CAN, P-CAN,
hard wire to control SKM system
External buzzer
(SKM buzzer)
Sounds a warning related to SKM
system
START/STOP switch
- Supplies power to the
vehicle wiith a button
(ACC, IGN1, IGN2)
- Indicates vehicle status
with LED illumination and
flashing
1. OVERVIEW
The SKM (Smart Key Module) system is equipped to only the vehicles with smart key and is to prevent
theft and enhance the driver experience. When the driver presses a door handle switch carrying a smart
key, this system checks the smart key information and driver door status and locks/unlocks the doors
(passive function). The vehicle can be started when the driver enters the vehicle and presses the
START/STOP switch (passive start function).
2. COMPONENTS
Smart key indicator
Smart key undetected warning/
verification fail indicator
BCM
Communicates with SKM through
B-CAN to control the vehicle
components

Engine starting
When the START/STOP button is pressed with the brake pedal applied and gear selector lever in P or
N position, the SKM performs the immobilizer verification and sends the engine START request signal
to the EMS if a normal coded smart key is found.
When the .engine start request signal from the START/STOP switch is received, the SKM sends the
start request signal through the P-CAN and the vehicle power status signal to the BCM through the B-
CAN.
The SKM cuts the power for IGN2 and ACC relays while the engine is cranking as cutting the electric
load is necessary.
The SKM receives the engine start status signal from the EMS (ECU) through the P-CAN. 1.
2.
3.
4.
EMS (ECU)Engine rpm, engine cranking/stop/running/loaded
TCUGear selector lever position: P, N
ABS/ESPVehicle speed signal (wheel speed sensor on each wheel)
The SKM turns on the ACC/IGN2 relays after the engine cranking and sends the signal for IGN after
starting to the BCM through the B-CAN.
When the START/STOP button is pressed and engine cranking request1 signal is sent, the EMS
(ECU) cranks the engine after checking the engine warming up. If the engine cranking request2
signal is sent, the EMS cranks the engine without checking the engine warming up. 5.
6.
Engine cranking request1
(engine start after
warming up)When the START/STOP button is pressed briefly under the start
conditions, the vehicle starts to warming up and then the engine is started
after a certain amount of time (warming up indicator ON to OFF).
Engine cranking request2
(engine start without
warming up)When the START/STOP switch is pressed once again while the engine
cranking request1 signal is sent, the engine is started (regardless of
warming up indicator)
It can be delayed by several seconds according to the engine
coolant temperature.
Starting engine while driving 7.
The engine start request signal is sent when the START/STOP switch is pressed, provided that the
vehicle speed is less than 10 Km/h or no vehicle speed signal is input, the gear selector lever is in
N position and the brake switch is ON with IGN ON (30 sec. verification is not required).
The engine start request signal is sent regardless of the brake signal when the START/STOP
switch is pressed, provided that the vehicle speed is 10 Km/h or more and the gear selector lever is
in N position with IGN ON (30 sec. verification is not required). -
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8712-03
No engine operation
When the START/STOP button is pressed at the vehicle speed of 3 km/h or less, the SKM turns off
the IGN relay to stop the engine.
When the vehicle speed is 3 km/h or more or no speed signal is input, the SKM performs the
following functions: 1.
2.
Vehicle status Conditions
3 km/h or faster - When the START/STOP switch is pressed for 3 seconds
or more, the ignition status is changed from IGN to ACC.
- If the engine START/STOP switch is pressed again, the
ignition status is changed from ACC to IGN.
Abnormal vehicle speed
(No or abnormal CAN signal)- When the START/STOP switch is pressed for 3 seconds
or more, the ignition status is changed from IGN to ACC.
- If the engine START/STOP switch is pressed again, the
ignition status is changed from ACC to Power OFF.
(DTC set)
When the START/STOP button is pressed and held with IGN ON, the ignition status is changed to
OFF. When the START/STOP button is pressed briefly, the ignition status is changed to ACC ON. 3.
ACC ON to Power OFF
The SKM changes the ignition status to OFF from ACC ON when:
the engine START/STOP button is pressed with the brake pedal released after the ignition status is
changed from IGN ON to ACC ON.
the REKES LOCK or passive LOCK signal is input with ACC ON.
the driver door is opened with ACC ON.
(Driver door open signal input through B-CAN)
12 minutes have passed with ACC ON. 1.
2.
3.
4.Condition for starting request transmission 8.
ACC ON: Gear selector lever (P/N), Brake switch ON, START/STOP switch signal
IGN ON: Vehicle in stationary, Gear selector lever (P/N), Brake switch ON, START/STOP
switch ON -
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Condition for canceling starting request 9.
At engine starting completed -

8510-00
Windshield heating switch
Press this switch to operate the windshield
heating system for 12 minutes. Press the
switch again to stop the system. The
heated glass will operate for about 6
minutes when the switch is pressed again
within 10 minutes after completion of its
first operation cycle. The indicator lamp for
the switch comes on when the heating is
on.
Hazard warning flasher switch
When the driver presses the switch, all the
turn signal lamps flash regardless of the
ignition switch status. Pressing the switch
again turns off the turn signal lamps. The turn
signal lamp does not operate while the
hazard warning flasher operates.
TRIP/RESET switch
Whenever pressing this button, the information is
displayed in the following order: Odometer, Trip
A, Trip B, Distance to empty, Average fuel
economy, Instant fuel economy, Illumination level,
Tire pressure (with TPMS), Ambient air
temperature (for STD); Trip A, Trip B, Distance to
empty, Average fuel economy/Instant fuel
economy, Illumination level, Tire pressure (with
TPMS), Ambient air temperature (for SVC). Press
and hold this button to initialize (reset) Trip A/Trip
B and average fuel consumption, adjust
illumination level or change the unit of
temperature.
Description
Rear glass/outside rearview mirror heating
switch
Press this switch to operate the rear glass and
outside rearview mirror heating system for 12
minutes. Press the switch again to stop the
system. The heated glass will operate for about 6
minutes when the switch is pressed again within
10 minutes after completion of its first operation
cycle. The indicator lamp for the switch comes on
when the heating is on.
The switch is operable only when the engine
is started.
The hazard warning flasher blinks
during emergency hazard warning
lamp control and air bag deployment
signal activation.
The switch is operable only when the
engine is started.