Mercedes-Benz ML320. Service manual - part 661

 

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Mercedes-Benz ML320. Service manual - part 661

 

 

Fig. 25: Identifying Rear Nozzle 

SERIES RESISTOR GROUP, LOCATION/TASK/FUNCTION - GF83.10-P-2161GC 

MODEL 163 up to 31.8.01, 168  

 

Rear nozzle 
position

The rear nozzle (1) is located at the rear center console.

 

 

Rear nozzle 
task

The rear compartment nozzle provides specific rear compartment 
ventilation in addition to the rear footwell air vents.

 

 

Rear nozzle 
function

 

GF83.10-P-
2111-01GI

 

Series resistor group, 
position

Model 168

GF83.10-P-2124-
01GC

   

Model 163

GF83.10-P-2124-
01GH

 

Series resistor 
assembly task

The series resistor assembly controls the blower voltage 
depending on the relevant blower level setting.

 

 

Series resistor 
assembly function

Model 168 up to 28.02.01

GF83.10-P-2124-
02GC

   

Model 168 as of 01.03.01

GF83.10-P-2124-
02GH

   

Model 163

GF83.10-P-2124-

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

REAR BLOWER MOTOR, FUNCTION - GF83.10-P-2168-01GI 

Function  

The rear blower motor (M2/1) is actuated using the blower button (

 ) on the rear ventilation control panel 

(N72/2s3). 

Pressing the blower button (

 ) passes a control voltage to the rear blower motor (M2/1) via the electronic 

rear ventilation blower regulator (N29/2). This facilitates blower speed control of 0-100 %. 

Automatic mode function  

Pressing the Auto button (

 ) on the rear ventilation control panel (N72/2s3) causes the rear blower motor to 

be regulated by the AAC push-button control module (N22). 

REAR BLOWER MOTOR, POSITION/TASK/DESIGN/FUNCTION - GF83.10-P-2168GI 

MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning  

Fig. 26: Identifying Rear Blower Motor 

02GD

 

Blower, 
location

The rear blower motor (M2/1) is located behind the rear nozzle below 
the center console.

 

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

BLOWER MOTOR FUNCTION - GF83.10-P-2170-01GI 

Function  

The AAC push-button control module (N22) passes a control voltage of 0-6 V to the blower regulator (A32n1) 
via the AC bus. Depending on the control voltage which is present, this then regulates the blower motor 
(A32m1) operating voltage of 0-12 V. This facilitates blower speed control of 0-100 %. 

The blower motor actuation (operating voltage) is influenced by the following factors: 

Blower power setting manual or AUTO  

Operating functions: 

Air distribution 

AC OFF mode 

Residual engine heat mode (actuation limited to 5 V) 

Mode status (heating, cooling)  

Coolant temperature  

Vehicle speed  

Fresh air/recirculation flap setting  

Flap positions  

Terminal 15 (blower ON), starter running (blower OFF)  

BLOWER MOTOR LOCATION/TASK/DESIGN/FUNCTION - GF83.10-P-2170GI 

MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning

  Blower, task

The rear blower motor (M2/1) serves to improve ventilation and cooling 
in the rear. 
The air that is drawn in by the blower in the evaporator housing is led to 
the rear blower motor (M2/1) via air ducts. 
The rear blower motor (M2/1) increases the flow of air.

 

 

Blower, 
function

 

GF83.10-P-
2168-01GI

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

Fig. 27: Identifying Blower Motor 

REAR SHUTOFF FLAP ACTUATOR MOTOR FUNCTION - GF83.10-P-2171-01GI 

Function  

Pressing the rear compartment air distribution button (

 ) on the AAC push-button control module (N22) 

actuates the rear shutoff flap actuator motor (M12/2) via the AC bus. The rear shutoff flap actuator motor 
(M12/2) therefore controls the rear shutoff flap, which opens and controls the air supply to the rear blowout 
ducts. 

 

Blower 
motor 
location

The blower motor (A32m1) is to the bottom right of the evaporator housing 
below the glove compartment.

 

 

Blower 
motor task

In fresh air mode the blower motor draws in fresh air via the fresh 
air/recirculating air flap. In recirculating air mode, air from the vehicle interior 
is drawn into the evaporator housing via the fresh air/recirculating air flap. 
When residual engine heat utilization is being used, the blower motor circulates 
the air around the interior.

 

 

Blower 
motor 
design

The blower motor is designed as a radial blower.

 

 

Blower 
motor 
function

 

GF83.10-P-
2170-01GI

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

 

 

 

 

 

 

 

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