2012 SSANGYONG NEW ACTYON SPORTS Service Manual

04-92110-01
3. PWM (PULSE WIDTH MODULATION) ELECTRIC FAN
OPERATION
1) Function
The PWM (Pulse Width Modulation) high capacity electric fan is installed instead of electric
condenser fan to enhance the durability and controllability and reduce noise.
2) Mounting Location
PWM
Fan shroud
Electric fan PWM unit

04-10
3) PWM Electric Fan
(1) Advantages and Disadvantages of the PWM Electric Fan
Advantages ▶
Enhanced A/C performance: at low speed,
at idling, driving in city
Reduction of vibration/noise: fan activated
by PWM only when necessary
Reduction of engine consuming power
(V/Fan driving force) by 4 Hp - Cost
saving -
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Disadvantage ▶
Poor engine cooling perfomance at low
and high rpm -
4) PWM (Pulse Width Modulation) Unit
It controls the time of the output voltage to
control the fan motor speed independently.
Internal functions ▶
Motor power shutting-off function when
overcurrent is applied
Adverse voltage prevention function
Detection function for the motor lock
Temperature detecting function: The
electric fan operates at FULL speed to
cool down the PWM unit when the interior
temperature of PWM unit is over
120~150°C.
Communication function when failing: The
fail signal is transmitted to the ECU when
the PWM unit is malfunctioning.
Soft start function: The motor speed is
gradually increased when the motor is
initially operated. -
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04-112112-01
5) Shutting-off Condition of the A/C Compressor
Coolant temperature ▶
When coolant temperature is below 20°C or over 115°C, engine speed is below 650 rpm or
over 4500 rpm for 4 seconds after engine starting, abrupt acceleration and A/C refrigerant
pressure sensor detecting the followings
A/C compressor is turned off when the refrigerant pressure is below 2.0 kg/cm2 and then
is turned on when the refrigerant pressure is over 2.4 kg/cm2.
A/C compressor is turned off when the refrigerant pressure is over 30 kg/cm2 and then is
turned on when the refrigerant pressure is below 21.4 kg/cm2. -
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1452-01/1462-01/2610-01/1440-01
GENERAL
1. DIAGNOSTIC INFORMATION AND
PROCEDURE.........................................
OVERVIEW AND OPERATION
PROCESS
1. DESCRIPTION AND OPERATION..........
REMOVAL AND INSTALLATION
1452-01 GENERATOR REPAIR
INSTRUCTIONS...........................
1462-01 STARTER REPAIR
INSTRUCTIONS...........................
2610-01 BATTERY REPAIR
INSTRUCTIONS...........................
1440-01 SPARK PLUG AND IGNITION
COIL REPAIR INSTRUCTIONS....3
5
11
12
13
14

05-2

05-31452-01
1. DIAGNOSTIC INFORMATION AND PROCEDURE
1) Ignition System

05-4
2) Ignition System (Cont'd)

05-51452-01
1. DESCRIPTION AND OPERATION
1) Battey
The sealed battery is standard on all cars. There are no vent plugs in the cover.
The battery is completely sealed, except for two small vent holes in the sides.
These vent holes allow the small amount of gas produced in the battery to escape.
The battery has the following advantages over conventional batteries:
No water addition for the life of the battery.
Overcharge protection. If too much voltage is applied to the battery, it will not accept as much
current as a conventional battery.
In a conventional battery, the excess voltage will still try to charge the battery, leading
to gassing, which causes liquid loss.
Not as liable to self-discharge as a conventional battery. This is particularly important when a
battery is left standing for long periods of time.
More power available in a lighter, smaller case. ·
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·
·
The battery has three major functions in the electrical system.
First, the battery provides a source of energy for cranking the engine.
Second, the battery acts as a voltage stabilizer for the electrical system. Finally, the battery
can, for a limited time, provide energy when the electrical demand exceeds the output of the
generator.
2) Ratings
<0068004700890088009b009b008c009900a00047008f0088009a0047009b009e0096004700990088009b00900095008e009a00610047004f005800500047008800470099008c009a008c0099009d008c0047008a008800970088008a0090009b00a0004700
990088009b00900095008e0047008b008c009a0090008e0095>ated at 27°C(80°F), which is the
time a fully charged battery will provide 25 amperes of current flow at or above 10.5 volts (2) a
cold cranking am
p rating determined under testing at -18°C(0°F), which indicates the cranking
load capacity. ▶
(1)Reserve Capacity
The reserve capacity (RC) is the maximum length of time it is possible to travel at night with the
minimum electrical load and no generator output. Expressed in minutes, the RC rating is the time
required for a fully charged battery, at a temperature of 27°C(80°F) and being discharged at a
current of 25 amperes, to reach a terminal voltage of 10.5 volts.