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Volume 4

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LOCATION:    12.2 Electric Mirror, Steering Column Adjustment, Heated Mirrors (EMSC)   >   23 Electrical Test Program - Test


Electrical Test Program - Test

Test step
DTC
Scope of test
Test connection
Test condition
Nominal value
Possible cause/remedy
1.0 Electric mirror/steering column adjustment control module (N32/9)
Voltage supply

15 (2)
N32/9

16
(2)
Disconnect connector (2) from control module (N32/9) 11-14 V Wiring
2.0 Outside rearview mirror control switch (S50/2)
Resistance
see Table I ( 23)
Disconnect connector (1) from control module (N32/9) see Table I Wiring
Outside rearview mirror control switch (S50/2)
3.0 Adjustable steering column switch (S59)
Resistance

15 (2)
N32/9

17
(2)
Disconnect connector (2) from control module (N32/9)
Move mirror control switch (S59) forward



< 1
Wiring
Adjustable steering column
switch (S59)
   
15 (2)
N32/9

11
(2)
Move switch (S59) back < 1  
   
15 (2)
N32/9

4
(2)
Move switch (S59) up < 1  
   
15 (2)
N32/9


10
(2)
Move switch (S59) down < 1  
4.0 Electrically adjustable and heated passenger side outside rearview mirror (M21/2)
Voltage supply

2 (1)
M21/2

3
(1)
Disconnect connector (1) from control module (M21/1)
Mirror control switch (S50/2) in left position
Move switch (S50/2):
forward
back





11-14 V
-11 to -14 V
Wiring
Electric mirror/steering column adjustment control module (N32/9)
   
2 (1)
M21/2

5
(1)
Move switch (S50/2):
left
right

11-14 V
-11 to -14 V
 
5.0 Electrically adjustable and heated driver's side outside rearview mirror (M21/2)
Voltage supply

2 (1)
M21/2

3
(1)
Disconnect connector (1) from control module (M21/2)
Mirror control switch (S50/2) in right position
Move switch (S50/2):
forward
back





11-14 V
-11 to -14 V
Wiring
Electric mirror/steering column adjustment control module (N32/9)
   
2 (1)
M21/2

5
(1)
Move switch (S50/2):
right
left

11-14 V
-11 to -14 V
 
6.0 Electrically adjustable inside rearview mirror (M21/3)
Voltage supply

5
M21/3


6
Remove inside mirror (M21/3) and disconnect connector
Mirror control switch (S50/2) in center position
Move switch (S50/2):
forward
back






11-14 V
-11 to -14 V
Wiring
Electric mirror/steering column adjustment control module (N32/9)
   
7
M21/3


5
Move switch (S50/2):
left
right

11-14 V
-11 to -14 V

 
7.0 Electrically adjustable outside rearview mirrors
(M21/1, M21/2), retraction feature
Voltage supply

 

7

M21/1, M21/2

 

6

Disconnect connector (X54/7)
Move switch (S50/2):
forward
back



11-14 V
-11 to -14 V
Wiring
Electric mirror/steering column adjustment control module (N32/9)
8.0 Adjustable stering column motor (M20)
Voltage supply

2
X54/7


1
Disconnect connector (X54/7)
Move steering column switch (S59):
right
left




11-14 V
-11 to -14 V
Wiring
Electric mirror/steering column adjustment control module (N32/9)
   
7
X54/7

8
Move switch (S50):
forward
back

11-14 V
-11 to -14 V

 
9.0 Adjustable stering column motor (M20)
Voltage supply

1
X54/7


2
Disconnect connector (X54/7)
0.1-15 Wiring
Adjustable stering column
motor (M20)
   
7
X54/7


8
  0.1-15
 
10.0 Serial Data Exchange 1) from Left front power seat control module (N32/1) to Electric mirror/steering column adjustment control module (N32/9)

N32/9


2
(1)
Disconnect connector (1) from control module (N32/9)

Press one of the memory position buttons on left front power seat switch group (S91)
0-1 V





4-7 V
Wiring
Left front power seat control
module (N32/1)
11.0 Electrically adjustable and heated driver's side outside rearview mirror (M21/1)
Potentiometer resistance

21 (1)
N32/9

4
(1)
Disconnect connector (1) from control module (N32/9) approx. 1000 Wiring
Electrically adjustable and heated driver's side outside rearview
mirror (M21/1)
   
1
(1)
N32/9


8
(1)
Manually move mirror glass in all directions value changes from
300-1200

 
12.0 Electrically adjustable and heated passenger side outside rearview mirror (M21/2)
Potentiometer resistance

14
(1)
N32/9

19
(1)
Disconnect connector (1) from control module (N32/9) approx. 1000 Wiring
Electrically adjustable and heatedpassenger side outside rearview mirror (M21/2)
   
9
(1)
N32/9


16
(1)
Manually move mirror glass in all directions value changes from
300-1200

 
13.0 Electrically adjustable inside rearview mirror (M21/3)
Potentiometer resistance

6
(2)
N32/9


7
(2)
Disconnect connector (2) from control module (N32/9)
approx. 1200 Wiring
Electrically adjustable inside rearview mirror (M21/3)
   
18 (2)
N32/9


19
(2)
Manually move mirror glass in all directions value changes from
400-1300

 
14.0 Adjustable steering column motor (M20)
Potentiometer resistance

6 (2)
N32/9

13
(2)
Disconnect connector (2) from control module (N32/9)
1100±220 Wiring
Adjustable steering column
motor (M20)
14.1
14.1 Potentiometer resistance  
Connect connector (2) to control module (N32/9)
Adjust steering column through complete range: up/back/down/forward
  Wiring
Adjustable steering column
motor (M20)
14.2
   
6 (2)
N32/9


5
(2)
Disconnect connector (2) from control module (N32/9)
record value  
     
Connect connector (2) to control module (N32/9)
Adjust steering column to full rear stop
 
 
   
5 (2)
N32/9

20
(2)
Disconnect connector (2) from control module (N32/9)
600±300
difference from recorded value
 
14.2 Potentiometer resistance
6 (2)
N32/9

20
(2)
Disconnect connector (2) from control module (N32/9) record value Wiring
Adjustable steering column
motor (M20)

     
Connect connector (2) to control module (N32/9)
Adjust steering column to full up stop
   
   
6 (2)
N32/9

20
(2)
Disconnect connector (2) from control module (N32/9) 600±300
difference from recorded value

 
15.0 Outside rearview mirror switch (S50/2)
Voltage supply

3
S50/2


2
Disconnect connector from switch (S50/2)
Parking lamps ON
11-14 V Wiring
Outside rearview mirror
switch (S50/2)
16.0 Adjustable steering column switch (S59)
Voltage supply

7
S59

5
Disconnect switch (S59)
Parking lamps ON
11-14 V Voltage supply, circuit 58d
Adjustable steering column
switch (S59)
17.0 Automatic dimming inside rearview mirror (H7)
Voltage supply

2
H7


5
Disconnect connector from mirror (H7)
Ignition: ON
11-14 V Wiring
18.0 Backup lamp switch (S16/2)
Voltage supply

2
H7


1
Disconnect connector from mirror (H7)
Ignition: ON

Transmission range "R" engaged


0-1 V


11-14 V
Wiring
Backup lamp switch (S16/2)
Exterior lamp failure monitoring module (N7)
19.0 Dome lamp (E15)
Voltage supply

3
H7


5
Disconnect connector from mirror (H7)
Ignition: ON

Dome lamp: ON


0-5 V

11-14 V
Wiring
Dome lamp (E15)
1) Serial Data Exchange=data cable over which digital data is transmitted in sequence.

Switch (S50/2) setting Move switch
1) 10
11
17
18
Center
(inside mirror)
to the: left
right
forward
back
< 1
< 1
< 1
< 1
> 20 k
> 20 k
> 20 k
> 20 k
> 20 k
< 1
< 1
> 20 k
> 20 k
> 20 k
< 1
< 1
Left
(Driver side mirror)
to the: left
right
forward
back
< 1
< 1
< 1
< 1
< 1
< 1
< 1
< 1
> 20 k
< 1
< 1
> 20 k
> 20 k
> 20 k
< 1
< 1
Right
(Passenger side)
to the: left
right
forward
back
> 20 k
> 20 k
> 20 k
> 20 k
< 1
< 1
< 1
< 1
> 20 k
< 1
< 1
> 20 k
> 20 k
> 20 k
< 1
< 1
Retract
(mirrors fold-in)
to the: forward
back
> 20 k
> 20 k
< 20 k
< 20 k
< 1
> 20 k
< 1
< 1
1) Disconnect connector (1) from Control module (N32/9)