SsangYong Korando III (2010 year). Service manual — part 131

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1. LAYOUT

D20DTF(Low CO2) D20DTF

ECU

Battery sensor (EBS)

Alternator (ALT)

Meter cluster (charge

warning lamp)

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2. OPERATING PROCESS

System diagram

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Operation

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EEM monitors the electric loads and battery conditions and controls the voltage to improve the fuel

economy and battery charging efficiency.
EBS on “-“ terminal of battery sends the battery information (voltage, current, temperature and

SOC) to engine ECU with LIN communication.

Engine ECU outputs the information from EBS and regulating control signal (PWM) according to the
engine load conditions to “L” terminal on alternator.

Engine ECU controls the magnetic resistance between stator coil and rotor coil by controlling the

current in rotor coil according to PWM duty value.

The alternating voltage induced to stator coil is converted to direct voltage by rectifier. And, EBS
outputs the charging voltage to “B” terminal on alternator.

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Operation of charge warning lamp

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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

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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

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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

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Circuit diagram

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