SsangYong Korando III (2010 year). Manual - part 374

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Key approval process

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When turning the ignition switch to ON position, the power is supplied to BCM and ECU. ECU 

communicate with the immobilizer key to check if it is valid crypto code. If it is valid, ECU start to control 

the engine when turning the ignition switch to START position. 

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.

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Smart key 

slot

Smart key

Start motor

Meter

cluster

BCM

SKM

D20DTF

ECU

c. Components for immobilizer with Smart key system

Components (For antenna, refer to Chapter “SKM”)

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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.

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Rear temp. 

sensor

Front temp. 

sensor

CDPF (DOC+DPF)

Throttle valve

D20DTF ECU

Differential pres. 

sensor

Oxygen sensor

(11) CDPF control

a. Overview

As the solution for environmental regulations and PM Particle Material) of diesel engine, the low emission 

vehicle is getting popular. This vehicle is equipped with an extra filter to collect the soot and burn it again 

so that the amount of PM in the exhaust gas passed through the DOC (Diesel Oxidation Catalyst) is 

reduced. The CDPF (Catalyst & Diesel Particulate Filter) is an integrated filter including DOC (Diesel 

Oxidation Catalyst) and DPF (Diesel Particulate Filter).

For details, refer to Chapter "CDPF".

b. Components