veh-mb-ml320-w163 climate control(2002-05) part2.pdf
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Rear Blower Control Unit
The left climate control button selects the rear fan speed The right button selects air distribution
The center Auto button allows the front control panel to select the fan
speed and air distribution
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Heating ModeCooling Mode
Air Distribution
Blend mode
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Air Distribution Groups
Main HVAC unit
Upper Instrument
Panel Ducting
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Rear Blower Unit Ducting
Consists of:
Ducting Rear blower motor
Rear blower motor
regulator
Rear temperature sensor B10/7
Rear air flap motor
M2/21
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AAC Circuit Inputs
Temperature sensorsB10/6
B10/6 - Evap sensor
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B10/7
AAC Circuit Inputs
Temperature sensorsB10/6
B10/6 - Evap sensor
B10/7
B10/7 - Rear temp
sensor
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B10/7
AAC Circuit Inputs
Temperature sensorsB10/6
B10/6 - Evap sensor
B10/7
B10/7 - Rear temp
sensor
B10/24
B10/24 - Center nozzle
temp sensor
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B10/7
AAC Circuit Inputs
Temperature sensorsB10/6
B10/6 - Evap sensor
B10/7
B10/7 - Rear temp
sensor
B10/24
B10/24 - Center nozzle
temp sensor
B10/25
B10/25 - Front footwell
temp sensor
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B10/7
AAC Circuit Inputs
Temperature sensorsB10/6
B10/6 - Evap sensor
B10/7
B10/7 - Rear temp
sensor
B10/24
B10/24 - Center nozzle
temp sensor
B10/25
B10/25 - Front footwell
temp sensor
B32
B32 - Sun sensor
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B10/7
AAC Circuit Inputs
Temperature sensorsB10/6
B10/6 - Evap sensorB10/7
B10/7 - Rear tempsensor
B10/24
B10/24 - Center nozzle
temp sensor
B10/25
B10/25 - Front footwell
temp sensor
B32
B32 - Sun sensor
N22b1- In-car Temp
sensor
B14 - Ambient temp
sensor
N72/2 - Rear control
field module
N72 - Lower Control
Panel
B12/2 - Refrigerant pressure/temperature sensor
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AAC Outputs
A9 - Compressor
N29/2 - Rear Blower
regulator
A32 -
Recircultated air
unit
Electric actuators -
M2/5, 2/6, 2/8, 2/12,
2/15, 2/21
M13 - Auxiliary water pump
M2/2 - Module box
blower motor
M2/2M13
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Electric Actuators
The electric actuators are the same
as those used on the 203 chassis
B+
Control
Ground
Coding pins
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Compressor Control
A1 - Instrument cluster B12/2 - Refrigerant pressure/temperature sensor
A9 - Compressor B14 - Outside temperature sensor
B10/6 - Evaporator sensor N22 - AAC pushbutton module
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Cooling Fan Control
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Acronyms/ abbreviations used in this program:
AC - Air Conditioning
A1 - Instrument Cluster
A9 - AC compressor
A32 - Recirculation air unit
B10/6 - Evaporator temperature sensorB10/7 - Rear temperature sensor
B10/24 - Center nozzle temperature sensor
B10/25 - Front footwell temperature sensor
B12/2 - Refrigerant pressure/temperature sensor
B14 - Outside temperature sensorB32 - Sun sensor
EVAP - evaporator
HVAC - Heat, Ventilation, Air Conditioning
LED - Light emitting diode
Ms - MotorsN22 - AC pushbutton control unit
N22b1 - In car temperature sensor
N29/2 - Rear blower regulator
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