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SsangYong Korando III (2010 year). Manual - part 164

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5) Start & Power Mode Control

The smart key system performs the smart key verification inside the vehicle to operate the

'Passive/Emergency start' and 'Power mode control'. It performs the following functions according to the

verification result.

Power mode control: Ignition status change

Immobilizer communication with EMS

Start request transmission to EMS

(1) Hardware interface

Replace the input shaft speed sensor with EMM or A/T and perform the TCU initialization and

coding work.

▶

Start button

- The SKM receives the signals from the START button and changes the ignition status or

stars/stops the engine.

Immobilizer holder antenna

- The SKM communicates with immobilizer antenna to verify the smart keys.

Output

▶

ACC relay

- The SKM operates the ACC relay.

IGN1 relay

- The SKM operates the IGN1 relay.

IGN2 relay

- The SKM operates the IGN2 relay.

START ready display

- The SKM operates the START ready display.

ACC status display

- The SKM operates the ACC status display.

ON status display

- The SKM operates the ON status display.

LF antenna

- The SKM controls the LF antenna outputs.

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(2) Ignition status change

The ignition status is changed to OFF, ACC ON, IGN ON and engine cranking by one START/STOP

button.

The SKM cuts the power for IGN2 and ACC relays while the engine is cranking as cutting the electric

load is necessary.

The SKM monitors the brake pedal status through the hardware signals.

The ignition status change is available when the engine START/STOP button is pressed.

The SKM uses the EMS (engine condition) and ABS/ESP (FR vehicle speed) signals sent through the

P-CAN bus (High Speed CAN).

When the smart key battery is discharged and the driver inserts the smart key into the immobilizer slot

in emergency mode, the smart key verification is performed if the brake or START switch is pressed

before the ignition status is changed (ACC ON, IGN ON).

Ignition status change during driving

When the engine START/STOP switch is pressed for 3 sec. or more at more than 3 km/h, 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.

The 4 vehicle speeds are abnormal (CAN signal timeout, abnormal signal):

If the engine START/STOP switch is pressed for 3 sec., the ignition status is changed from IGN

to ACC. If the switch is pressed again, the ignition status is changed from ACC to OFF (DTC

set).

The SKM changes the ignition status as follows:

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When the ignition status is changed, the SKM communicates according to the body network

conditions as follows:

OFF → ACC: Keep communicating for 5 sec.
OFF → IGN: Keep communicating
ACC → IGN: Keep communicating
IGN → Cranking: Keep communicating
Cranking→ IGN: Keep communicating
IGN → ACC: Keep communicating for 5 sec.
ACC → OFF: Keep communicating for 5 sec.
IGN → OFF: Keep communicating for 5 sec.

(3) Engine start

When the START 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 switch is received, the SKM sends the start

request signal through the PCAN and the smart key location signal through the BCAN to crank the

engine.

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 through the PCAN.

The SKM turns on the ACC/IGN2 relays after the engine cranking and sends the signal for [IGN after

starting] through BCAN.

When the START button is pressed and engine cranking request1 signal is sent, the EMS 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.

Engine cranking request1:

When the START switch is pressed briefly under a normal condition

Engine cranking request2:

When the START switch is pressed once again while the engine cranking request1 signal is sent,

OR When the START switch is pressed for 3 sec. or more

Starting engine while driving

The engine start request signal is sent when the START 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 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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(4) Engine stop

When the START 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:

When the START switch is pressed for 3 sec. or more at more than 3 km/h, the ignition status is

changed from IGN to ACC.

If the switch is pressed again, the ignition status is changed from ACC to IGN.

When the START switch is pressed for 3 sec. or more with no vehicle speed signal (CAN signal

timeout, abnormal signal), the ignition status is changed from IGN to ACC. If the switch is pressed

again, the ignition status is changed from ACC to OFF.

When the START button is pressed and held with IGN ON, the ignition status is changed to OFF.

When the START button is pressed briefly, the ignition status is changed to ACC ON.

(5) ACC ON/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 is operated with ACC ON.

the BCM sends the driver's door open signal.

12 minutes have passed with ACC ON.

Except brake switch signal input

For the vehicles with A/T, when the START switch is pressed for 10 sec. or more, the ignition

status is changed to IGN ON and the engine start request signal is sent regardless of the brake

signal, provided that the initial ignition status is ACC ON and the gear selector lever is in P or N

position.

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