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Diagnostic Manual, Body and Accessories,
Volume 2.1

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LOCATION:    5.4 Convenience Feature (CF)   >   23 Electrical Test Program - Test


Electrical Test Program - Test

Test scope
Test connection
 Test condition Nominal value Possible cause/ Remedy 1)
1.0   Door switches (S17/3, S17/4, S17/5, S17/6)

 
    DM, B&A, Vol. 1.1 PSE, section 3.4, 23
2.0   Left front door IR
receiver (A26/1)
Voltage supply

4
(3)
N69/1


14
(3)
 Disconnect connector (3) from front driver-side door control module (N69/1).
4.5 - 5.5 V 2.1,
N69/1
2.1   Left front door IR
receiver (A26/1)
1
A26/1

2
 Remove A26/1

4.5 - 5.5 V

Wiring.
3.0   Right front door IR
receiver (A26/2)
Voltage supply

4
(3)
N69/2


14
(3)
 Disconnect connector (3) from front passenger-side door control module (N69/2).
4.5 - 5.5 V
3.1,
N69/2
3.1   Right front door IR
receiver (A26/2)

2
A26/2


3
Remove A26/2
4.5 - 5.5 V
Wiring.
4.0
Left front power window switch (N72s1)


 



 
 Ignition: ON
Switch (N72s1):


 		 Lower control field control
module (N72).
       
Press back of switch:  
       
Press back of switch past
first detent and hold:

 
       
Press front of switch:  
       
Press front of switch past
first detent and hold:		  
5.0 Activation of:
Left front power window motor (M10/3) via front driver-side door control module (N69/I)
2
M10/3

5
 Disconnect connector from M10/3.
Ignition: ON


Switch (N72s1):

Press back of switch:
Press back of switch past
first detent and hold:
Press front of switch:		 Relay in control module N69/1
engages audibly.

For approx. 1 second:
11 - 14 V

11 - 14 V
-11 to -14 V		 Wiring,
4.0,
N69/1
       
Press front of switch past
first detent and hold:
-11 to -14 V		  
6.0 Left front power window motor (M10/3)
Voltage supply
Hall sensor

3
M10/3


6
 Ignition: ON
Disconnect connector from M10/3
11 - 14 V

Wiring,
Front driver-side door control module (N69/I).
7.0 Left front power window motor (M10/3)
Hall sensor		  

Ignition: ON
Switch (N72s1):

Press back of switch:
Press back of switch past first detent and hold:

Press front of switch:
Press front of switch past first detent and hold:



Window opens,
raising values.


Window closes,
falling values.
Hall sensor
8.0   Left front power window switch (S21/1)
Model 208.4 only

30
N52



36
 Ignition: ON

Switch (S21/1) in position:








approx. 14 V
approx. 8.5 V
approx. 0 V
approx. 5 V
approx. 2.5 V
If one value is not
OK, S21/1,

If several values are not
OK, 8.1

All values are OK, 8.2
8.1   Resistance
Model 208.4 only

30
N52



36
 Ignition: OFF
Disconnect connector
from N52,
Switch (S21/1) in position:









> 20 k
approx. 900
approx. 0
approx. 510
approx, 125
If one value is not
OK, S21/1,

If several values are not
OK, Wiring, S21/1,

All values are OK, N52
8.2


  Switch illumination
Model 208.4 only
1
S21/1

3
 Disconnect connector
from S21/1,
Light switch S1 (58d) ON;
Set combination display (A1) at max setting


approx. 11 V		 Wiring,
S21/1
9.0 Right front power window switch (N72s2)  

Ignition: ON
Switch (N72s2):


 		 Lower control field control
module (N72).
       
Press back of switch:  
       
Press back of switch past first detent and hold:

 
       
Press front of switch:  
       
Press front of switch past first detent and hold:

 
10.0 Activation of:
Right front power window motor (M10/4) via front passenger-side door control module (N69/2)
2
M10/4

5
 Disconnect connector from M10/4.

Ignition: ON

Switch (N72s2):

Press back of switch:
Press back of switch past,
first detent and hold:
Press front of switch:
Press front of switch past
first detent and hold:		 Relay in control module N69/2 engages audibly.

For approx. 1 second:
11 - 14 V

11 - 14 V
-11 to -14 V

-11 to -14 V
Wiring,
8.0,
N69/2
11.0 Right front power window motor (M10/4)
Voltage supply
Hall sensor
3
M10/4


6
 Ignition: ON
Disconnect connector from M10/4
11 - 14 V

Wiring,
N69/2
12.0 Right front power window motor (M10/4)
Hall sensor		  

Ignition: ON
Switch (N72s2):

Press back of switch:
Press back of switch past first detent and hold:

Press front of switch:
Press front of switch past first detent and hold:


Window opens,
raising values.


Window closes,
falling values.

Hall sensor
13.0   Right front power window switch (S21/2)
Model 208.4 only


49
N52




17
 Ignition: ON

Switch (S21/2) in position:





11 - 14 V


approx. 14 V
approx. 8.5 V
approx. 0 V
approx. 5 V
approx. 2.5 V
If one value is not
OK, S21/2,

If several values are not
OK, 13.1

All values are OK, 13.2
13.1   Resistance
Model 208.4 only

49
N52


17
 Ignition: OFF
Disconnect connector
from N52
Switch (S21/2) in position:









> 20 k
approx. 900
approx. 0
approx. 510
approx. 125
If one value is not
OK, S21/2,

If several values are not
OK, Wiring, S21/2

All values are OK, N52
13.2

  Switch illumination
Model 208.4 only
1
S21/1

3
 Disconnect connector
from S21/2
Light switch S1 (58d) ON;
Set combination display (A1) at max setting


approx. 11 V		 Wiring,
S21/2
14.0 Left rear power window switch (N72s3)  

Ignition: ON
Switch (N72s3):


 		 Lower control field control
module (N72).
       
Press back of switch:  
       
Press back of switch past
first detent and hold:

 
       
Press front of switch:  
       
Press front of switch past
first detent and hold:
 
15.0
Left rear power window switch (S21/3)
2
N69/3

7
Ignition: OFF
Switch (S21/3):

Press back of switch:
Press back of switch past
first detent and hold:



1240

330
Wiring,
S21/3
       
Press front of switch:
Press front of switch past
first detent and hold:
510

660 		 
16.0 Right rear power window switch (N72s4)  

Ignition: ON
Switch (N72s4):
 		 Lower control field control
module (N72).
       
Press back of switch:  
       
Press back of switch past
first detent and hold:

 
       
Press front of switch:  
       
Press front of switch past
first detent and hold:
 
17.0
Right rear power window switch (S21/4)
2
N69/4

7
Ignition: OFF
Switch (S21/4):

Press back of switch:
Press back of switch past
first detent and hold:



1240

330
Wiring,
S21/4
       
Press front of switch:
Press front of switch past
first detent and hold:
510

660 		 
18.0   Child safety lock
switch (N72s5)		  

Ignition: ON
Switch (N72s5):

Push switch to right:
(Child symbol visible)

Push switch to left:
(Child symbol not visible)






Lower control field control
module (N72).
19.0 Sliding/pop-up roof
motor (M12/1m1)
Hall sensors		  

Ignition: ON
Press sliding/pop-up roof (SR) switch (N70s1):

Press switch forward:



Press switch backward:




Sliding roof closes,
raising values.

Sliding roof opens,
falling values.
20.0
20.0 Sliding/pop-up roof
motor (M12/1m1)
Voltage supply
Hall sensor

6
(B)
N70


4
(B)
 Disconnect connector (B) from N70
Ignition: ON
11 - 14 V

Roof control panel control module (N70).
21.0
Sliding/pop-up roof (SR) switch (N70s1)
 


 
 Ignition: ON
Switch (N70s1):
 		 Roof control panel control
module (N70).
       
Press switch backward:  
       
Press switch forward:  
       
Push switch up:  
       
Pull switch down:
 
22.0   Voltage supply from front driver-side door control module (N69/I) to left front door lock switch (CF) (S86/1)2)
N69/1
1
(2)


+

 		 11 - 14 V Front driver-side door control module (N69/1).
23.0
Left front door lock switch (CF) (S86/1)2)


2
(2)
N69/1

3
(2)

With key in left front door lock:

Lock:

Rest position:

Unlock:

 


<1

>20 k

<1  

 Wiring,
S86/1
25.0   Non-USA vehicles only,
continue to next test step.
 
     
25.0   Non-USA vehicles only,
continue to next test step.
 
     
26.0
 		 Trunk lid lock switch
(CF) (S88/2)

11
(1)
A37



21
(1)
With key in trunk lid lock:

Lock:
Rest position:
Unlock:


<1
>20 k
<1 		Wiring,
S88/2
1) Observe Preparation for Test, see 22.
2) (only )


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