SsangYong: Engine Euro 4. Instruction - page 36
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
5
1520
COOLING SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
ENGINE
FUEL
I
N
T
AKE
EXHAUST
PRE-HEA
TING
LUB
COOLING
SWITCHABLE
ECU
DIAGNOSIS
Water Pumps for D27DTP (POWER UP) Engine and D27DT Engine
Water Pump for D27DT Engine
Water Pump for D27DTP (POWER UP) Engine
Gasket
Coolant
inlet pipe
Thermostat
Tube
Dowel pin
Water pump
housing
Water pump
bearing housing
Thermostat
Start to open: 0.1 mm at 85°C
Fully opened: 8 mm at 100°C
Tube
O-ring
Water pump
housing
Dowel pin
Flange bolt
Tightening torque: 10 Nm
±
1Nm
Water pump
bearing housing
Coolant
inlet pipe
Gasket
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
6
6820
COOLING SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
A/C REFRIGERANT PRESSURE SENSOR (D27DTP) AND
TRIPLE PRESSURE SWITCH (D27DT)
2. A/C PRESSURE SWITCH: FOR D27DTP (POWER UP) ENGINE
Overview
This senses the A/C refrigerant pressure continuously and converts it to voltage value which is then sent to ECU for
the optimum control.
Function: Stopping A/C compressor
For more details, refer to “Refrigerant Pressure Sensor”.
Refrigerant pressure sensor
For the vehicle equipped with D27DT engine, there is triple pressure switch on the receiver drier. For the vehicle
equipped with D27DTP (POWER UP) engine, the pressure sensor is installed.
The A/C refrigerant pressure sensor monitors the refrigerant pressure of the air conditioner and sends that informa-
tion to ECU for the optimum control.
1. A/C TRIPLE PRESSURE SWITCH: FOR D27DT ENGINE
• HIGH/LOW pressure switch
It check the A/C line for clogging or gas penetration to stop the A/C compressor or to control the high-speed fan
to protect the compressor from damage.
• Intermittent pressure switch
When the pressure in the A/C line is over a certain value (14 kgf/cm
2
), it sends a signal to operate the cooling fan.
Triple pressure switch
A/C SW
HIGH pressure
SW (NC)
LOW pressure
SW (NC)
Triple pressure SW
Intermittent pressure
SW (NO)
GND
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
7
6820
COOLING SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
ENGINE
FUEL
I
N
T
AKE
EXHAUST
PRE-HEA
TING
LUB
COOLING
SWITCHABLE
ECU
DIAGNOSIS
Output Voltage
Functions of Refrigerant Pressure Sensor (D27DTP)
The refrigerant pressure sensor continuously monitors the refrigerant pressure in the A/C system to control the A/C
compressor under the following conditions:
Conditions for shutting off the A/C compressor
• Coolant temperature: Below -20°C or over 115°C
• For 4 seconds after starting the engine
• If the engine rpm is below 650 rpm or above 4500 rpm
• Sudden acceleration of vehicle
• Operation A/C refrigerant pressure sensor
- The compressor is turned off when the refrigerant pressure is below 2.0 kgf/cm
2
and is turned on again when the
pressure is over 2.4 kgf/cm
2
.
- The compressure is turned off when the refrigerant pressure is over 30 kgf/cm
2
and is turned on again when the
pressure is below 21.4 kgf/cm
2
.
Conditions for Shutting Off the A/C Compressor
Pressure (kgf/cm
2
)
Output voltage (V)
Pressure (kgf/cm
2
)
Output voltage (V)
0
4
8
12
16
0.5
1.0
1.5
2.0
2.5
20
24
28
32
3.0
3.5
4.0
4.5
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
8
6820
COOLING SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
3. NEW DTCS FOR A/C REFRIGERANT SENSOR
P0530
P0532
P0533
Air Conditioner
Refrigerant
Sensor Supply
Power Fault
Air Conditioner
Refrigerant
Pressure Signal
Circuit Short
Excessive Air
Conditioner
Refrigerant
Pressure
- Causes
• There is electric problem in the air conditioner’s
pressure sensor.
- Check the sensor’s specifications and ECU pin.
• Power: 5V ......... ECU Pin #B29
• Sensor signal .... ECU Pin #B41
• Sensor GND ...... ECU Pin #B36
• Actual range: 2.0 kgf/cm
2
(0.75V) ~ 32 kgf/cm
2
(4.5V)
• Resistance: 51K
Ω (signal terminal and ground)
• Output signal
0.5V ................... 0.0 kgf/cm
2
4.5V ................... 32.0 kgf/cm
2
- Actions
• Check the sensor’s resistance and wiring.
• Visually check the unit and replace if necessary.
- Causes
• There is electric problem in the air conditioner's
pressure sensor.
- Check the sensor’s specifications and ECU pin.
• Power: 5V ......... ECU Pin #B29
• Sensor signal. ... ECU Pin #B41
• Sensor GND ...... ECU Pin #B36
• Actual range: 2.0 kgf/cm
2
(0.75V) ~ 32 kgf/cm
2
(4.5V)
• Resistance: 51K
Ω (signal terminal and ground)
• Output signal
0.5V ................... 0.0 kgf/cm
2
4.5V ................... 32.0 kgf/cm
2
- Actions
• Check the sensor’s resistance and wiring.
• Visually check the unit and replace if necessary.
- Causes
• There is electric problem in the air conditioner’s
pressure sensor.
- Check the sensor’s specifications and ECU pin.
• Power: 5V ......... ECU Pin #B29
• Sensor signal .... ECU Pin #B41
• Sensor GND ...... ECU Pin #B36
• Actual range: 2.0 kgf/cm
2
(0.75V) ~ 32 kgf/cm
2
(4.5V)
• Resistance: 51K
Ω (signal terminal and ground)
• Output signal
0.5V ................... 0.0 kgf/cm
2
4.5V ................... 32.0 kgf/cm
2
- Actions
• Check the sensor’s resistance and wiring.
• Visually check the unit and replace if necessary.
Engine
Malfunction
Indicator
light
DTC
Trouble
Limp
Home
Mode
Delayed
Engine
Stop
Torque
Reduction
(max.
20%)
Help
Torque
Reduction
(max.
50%)
Immedi-
ately
Engine
Stop