1997 MERCEDES-BENZ ML350 sensor

BLENDING AIR FLAP ACTUATOR MOTOR, LOCATION/TASK/FUNCTION - GF83.57-P-2112GI
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning
Fig. 123: Identifying Blending Air Flap Actuator Motor

ICING PROTECTION TEMPERATURE SENSOR, LOCATION/TASK/FUNCTION - GF83.57-P-2113GH
actuator motor, locationModel 1682105-01GC
Model 163GF83.57-P-
2105-01GH
Blending air flap
actuator motor, taskThe blending air flap actuator motor (M16/8) serves to set
the air conditioning system's ventilation temperature.
Blending air flap
actuator motor, functionModel 168GF83.57-P-
2105-02GC
Model 163GF83.57-P-
2105-02GH
Blending air flap
actuator motor, locationThe blending air flap actuator motor (M2/6) is located at the
top center of automatic air conditioner housing.
Blending air flap
actuator motor, taskThe blending air flap actuator motor (M2/6) serves to set the
air conditioning system's ventilation temperature.
Blending air flap
actuator motor, function GF83.57-P-
2105-02GI

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 146 © 2006 Mitchell Repair Information Company, LLC.

MODEL 163 up to 31.8.01 with CODE (580) Air conditioning or Tempmatic for USA
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning
IN-CAR TEMPERATURE SENSOR, LOCATION - GF83.57-P-2115-01GH
The in-car temperature sensor (B10/4) with suction jet nozzle is located on the left of the center console next to
the radio.
Fig. 124: Identifying In
-Car Temperature Sensor
IN-CAR TEMPERATURE SENSOR, FUNCTION - GF83.57-P-2115-02GH
Function
When the blower is running, air is constantly drawn out of the vehicle interior by a suction jet nozzle for the in-
car temperature sensor (B10/4) to measure the temperature when the ignition is. ON .
The in-car temperature sensor (B10/4) records the interior temperature and conveys it to the AAC push-button
control module, where a comparison is made with the setting on the temperature selector. The blend air flap is
repositioned depending on the result of this.
It is connected to the AAC push-button control module via a separate electric cable.
Constant circulation of interior air at the in-car temperature sensor (B10/4) is achieved by this ventilation and
therefore a hi
gh level of control accuracy is guaranteed.

Icing protection
temperature sensor,
location
GF83.57-P-
2106-01GH

Icing protection
temperature sensor,
taskThe icing protection temperature sensor (R35) records the
evaporator temperature, whereupon the refrigerant compressor is
switched off and the evaporator protected against icing up.


Icing protection
temperature sensor,
function
GF83.57-P-
2106-02GH

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 147 © 2006 Mitchell Repair Information Company, LLC.

IN-CAR TEMPERATURE SENSOR, LOCATION/TASK/FUNCTION - GF83.57-P-2115GH
MODEL 163 up to 30.11.99 with CODE (580) Air conditioning or Tempmatic for USA with suction jet
nozzle
IN-CAR TEMPERATURE SENSOR, LOCATION/TASK/FUNCTION - GF83.57-P-2115GI
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning
Fig. 125: Identifying Interior Air Temperature Sensor

CENTER NOZZLE VENT AIR TEMPERATURE SENSOR, LOCATION/TASK/FUNCTION - GF83.57-P-2116GI
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning

In-car
temperature
sensor, location
GF83.57-P-
2115-01GH

In-car
temperature
sensor, taskThe in-car temperature sensor (B10/4) with suction jet nozzle records
the interior temperature and conveys this to the AAC push-button
control module. The suction jet nozzle ensures air from the vehicle
interior flows evenly around the in-car temperature sensor (B10/4).


In-car
temperature
sensor, function
GF83.57-P-
2115-02GH
In-car temperature
sensor, locationThe in-car temperature sensor (N22b1) is located below in the temperature selector
wheel of the AAC push-button control module.
In-car temperature
sensor, taskThe in-car temperature sensor (N22b1) records the in-car temperature and sends it
to the AAC push-button control module (N22).
In-car temperature
sensor, function
The recorded in-car temperature value is compared by the AAC push-button control
module with the setting in the temperature selector wheel whereupon it authorizes a
corresponding adjustment to the blending air flap to be made depending upon the
result.


2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 148 © 2006 Mitchell Repair Information Company, LLC.

Fig. 126: Identifying Center Nozzle Vent Air Temperature Sensor
FRONT FOOTWELL VENT AIR TEMPERATURE SENSOR, LOCATION/TASK/FUNCTION - GF83.57-P-2117GI
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning

Center nozzle vent air
temperature sensor,
locationThe center nozzle vent air temperature sensor (B10/24) is located to the left of
the air duct's center nozzle below the instrument panel.

Center nozzle vent air
temperature sensor,
taskThe center nozzle vent air temperature sensor (B10/24) records the temperature
of the air flowing out of the center nozzle and sends it to the AAC push-button
control module (N22).


Center nozzle vent air
temperature sensor,
functionThe vent air's recorded temperature value is compared by the AAC push-button
control module (N22) with the setting in the temperature selector wheel
whereupon it authorizes a corresponding adjustment to the blending air flap to
be made depending upon the result.


2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 149 © 2006 Mitchell Repair Information Company, LLC.

Fig. 127: Identifying Front Footwell Vent Air Temperature Sensor
REAR AIR STREAM TEMPERATURE SENSOR, LOCATION/TASK/FUNCTION - GF83.57-P-2118GI
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning

Front footwell vent air
temperature sensor,
locationThe front footwell vent air temperature sensor (B10/25) is located to the left of
the automatic air conditioning box below the instrument panel.

Front footwell vent air
temperature sensor,
taskThe front footwell vent air temperature sensor (B10/25) records the temperature
of the air flowing in the front footwell and sends it to the AAC push-button
control module (N22).


Front footwell vent air
temperature sensor,
functionThe vent air's recorded temperature value is compared by the AAC push-button
control module (N22) with the setting in the temperature selector wheel and
authorizes a corresponding adjustment to the blending air flap to be made
depending upon the result.


2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 150 © 2006 Mitchell Repair Information Company, LLC.

Fig. 128: Identifying Rear Air Stream Temperature Sensor
AMBIENT TEMPERATURE DISPLAY TEMPERATURE SENSOR, FUNCTION - GF83.57-P-2119-01GI
Function
The resistance of the ambient temperature display temperature sensor is dependent on the ambient temperature
and speed. The current resistance value is sent via the CAN data bus to the AAC push-button control module
(N22), which then slightly readjusts the set temperature.
The fact that the ambient temperature is dependent on the speed helps to prevent any excess temperature being
sent to the AAC push-button control module (N22) when the car is at a standstill or traveling slowly, e.g. as
induced b
y engine heat radiation.

Rear air stream
temperature sensor,
locationThe rear air stream temperature sensor (B10/7) is located to the left of the rear
passenger compartment blower motor housing behind the rear nozzle.

Rear air stream
temperature sensor,
taskThe rear air stream temperature sensor (B10/7) records the temperature of the air
flowing in the rear passenger compartment and sends it to the AAC push-button
control module (N22).


Rear air stream
temperature sensor,
functionThe recorded temperature value for the rear ventilation air stream is compared by
the AAC push-button control module (N22) with the setting in the temperature
selector wheel and authorizes a corresponding adjustment to the blending air flap
to be made depending upon the result.


2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 151 © 2006 Mitchell Repair Information Company, LLC.

When switching the ignition on or off and at speeds of less than 20 km/h the last measured temperature value is
used.
At ignition OFF, the last ambient temperature used for the control operation is stored.
AMBIENT TEMPERATURE DISPLAY TEMPERATURE SENSOR, LOCATION/TASK/FUNCTION - GF83.57-P-2119GI
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning
Fig. 129: Identifying Ambient Temperature Display Temperature Sensor

RESIDUAL ENGINE HEAT UTILIZATION SYSTEM, FUNCTION - GF83.75-P-2000GI
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning
Function
The residual en
gine heat utilization system allows the vehicle to be heated even when the ignition is switched
Ambient temperature display
temperature sensor, locationThe ambient temperature display temperature sensor
(B14) is located on the front left side of the bumper.
Ambient temperature display
temperature sensor, taskThe ambient temperature display temperature sensor
(B14) determines the ambient temperature.
Ambient temperature display
temperature sensor, function GF83.57-P-
2119-01GI

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 152 © 2006 Mitchell Repair Information Company, LLC.

Parts ordering notes
INSUFFICIENT AIR CONDITIONING DURING IDLING - AF83.30-P-6007A
MODEL 163.154 #A up to 289564, 163.154 #X, 163.136 /172 with CODE (580) Air conditioning or
Tempmatic for USA
Modification notes
Operation no. of operation texts or standard texts and flat rates
Damage
codeCauseRemedy
83 751
Pressure sensor (B12) occasionally indicates wrong
pressure value to control and operating module
(N19/22) (depending on temperature).
1 Connect pressure gauge and HHT.

Air conditioning/automatic air conditioning
occasionally does not function, refrigerant
compressor does not run.2 Call up air conditioning actual values
with HHT.

3 Compare refrigerant pressure
between pressure gauge (high pressure
side) and HHT.


If pressure difference is greater than
2 bars.?
4 Remove/install/replace pressure
sensor on receiver/drier.

Part no.DesignationQuantity
140 830 00 72Pressure sensorAs required
21.6.04Work steps 1-2 erased
CategoryOp.
no.Operation textTimeAcc.
no.Code
P023731Install modified wiring harness for auxiliary fan (after
checking)015
WU--
Damage
codeCauseRemedy
50 041 73
Fuse f44 blows due to
repeated switch-on of
additional fan
1 Check whether service auxiliary wiring harness (2)
for additional fan has already been installed
The original additional fan connector (M4x1) is
already fastened next to the new additional fan
connector (3) with adhesive tape.


If auxiliary wiring harness (2) is already
installed: ?
2 Ensure that a 40 A fuse is located at position f44


2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 156 © 2006 Mitchell Repair Information Company, LLC.