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LOCATION:    15.1 Electric Seat Adjustment (ESA)   >   28 Electrical Test Program - Test (right seat)


Electrical Test Program - Test (right seat)

<
Test step Test scope
Test connection
 Test condition Nominal value Possible cause/Remedy
1.0 Right ESA control module (N32/2)
Voltage supply

1
1
1
(2)
N32/2





2
4
3
(2)
Connector (2) unplugged from N32/2.
11 - 14 V
11 - 14 V
11 - 14 V		 Wiring,
CF relay module (K24).
2.0 Fore/aft switch (S92s1)
Resistance

4
(1)
N32/2


3
(1)
Connector (1) unplugged from N32/2.

Press switch (S92s1):
forward
backward

approx. 2.2 k


approx. 43
approx. 16 		Wiring,
S92
3.0 Fore/aft motor (M28m1)
Voltage supply

Up to 11/96


2
(7)

 

 

 

 


3
4
(7)

N32/2








 


N32/2



1
(7)

 

 

 

 


5
5
(7)

Connector (1) plugged at N32/1.
Set backrest vertical.
Connector (7) unplugged from N32/1.
Press switch (S92s1):
forward
backward





 

< 1 V

11 - 14 V
-11 to -14 V

approx. 5 V
approx. 5 V

Wiring,
S92,
N32/2
[ 3.0] Fore/aft motor (M28m1)
Voltage supply
Hall sensor

As of 12/96


2
(7)

 

 

 

 


5
(7)


5
(7)

N32/2











N32/2



N32/2



1
(7)

 

 

 

 


4
(7)


4
(7)

Connector (1) plugged at N32/1.
Set backrest vertical.
Connector (7) unplugged from N32/2.
Press switch (S92s1):
forward


backward







Open connector (7) and connect to N32/2



< 1 V

 



for 1 second:
11 - 14 V

for 1 second:
-11 to -14 V


11 - 14 V



7.7 - 8.8 V
or
11.3 - 12.7 V

Wiring,
S92,
N32/2










N32/2



Wiring,
M28m1
4.0 Fore/aft motor (M28m1)
Resistance

4
(2)
1
(2)
N32/2




1
(7)
2
(7)
Connector (7) unplugged from N32/2.



Danger of being wedged in.

Bridge sockets 4 and 1 with fused jumper wire
124 589 37 63 00
Motor (M28m1) runs. Wiring,
M28m1
5.0 Front raise/lower
switch (S92s3)
Resistance

4
(1)
N32/2



2
(1)
Connector (1) unplugged from N32/2.

Press switch (S92s3):
raise front
lower front

approx. 2.2 k



approx. 43
approx. 16 		Wiring,
S92
6.0 Front raise/lower
motor (M28m3)
Voltage supply

Up to 11/96


2
(6)

 

 

 



3
(6)


4
(6)

N32/2






 




N32/2



N32/2



1
(6)

 

 

 



5
(6)


5
(6)

Connector (1) plugged in at N32/2.
Connector (6) unplugged from N32/2.
Press switch (S92s3):
raise front
lower front




< 1 V

 

11 - 14 V
-11 to -14 V

approx. 5 V



approx. 5 V

 Wiring,
S92,
N32/2
[6.0] Front raise/lower
motor (M28m3)
Voltage supply
Hall sensor

As of 12/96


2
(6)

 

 

 


 

5
(6)


5
(6)

N32/2








 

N32/2



N32/2



1
(6)

 

 

 


 

4
(6)


4
(6)

Connector (1) plugged in at N32/2.
Connector (6) unplugged from N32/2.
Press switch (S92s3):
raise front






 


Open connector (6) and
connect to N32/2






< 1 V

for 1 second:
11 - 14 V
for 1 second:
-11 to -14 V


11 - 14 V




7.7 - 8.8 V
or
11.3 - 12.7 V

Wiring,
S92,
N32/2







N32/2



 

 

Wiring,
M28m3
7.0 Front raise/lower
motor (M28m3)
Resistance

4
(2)
1
(2)
N32/2





1
(6)
2
(6)
Connectors (6) and (2) unplugged from N32/2.



Danger of being wedged in.

Bridge sockets 4 and 1 with fused jumper wire
124 589 37 63 00
Motor (M28m3)
runs.
M28m3
8.0 Rear raise/lower
switch (S92s2)
Resistance

4
(1)
N32/2




3
(1)
Connector (1) unplugged in N32/2.

Press switch (S92s2):
raise rear
lower rear



approx. 2.2 k


approx. 160
approx. 75

Wiring,
S92
9.0 Rear raise/lower
motor (M28m2)
Voltage supply

Up to 11/96


2
(5)

 



 



4
(5)


3
(5)

N32/2






 



N32/2



N32/2



1
(5)

 

 

 

 


5
(5)


5
(5)

Connector (1) plugged in N32/1.
Connector (5) unplugged from N32/2.
Press switch (S92s2):
raise rear
lower rear





< 1 V


11 - 14 V
-11 to -14 V

 

approx. 5 V



approx. 5 V

 Wiring,
S92,
N32/2
[9.0] Rear raise/lower
motor (M28m2)
Voltage supply
Hall sensor

As of 12/96


2
(5)

 

 



 

5
(5)


5
(5)

N32/2








 

N32/2



N32/2



1
(5)

 

 





4
(5)


4
(5)

Connector (1) plugged in at N32/1.
Connector (5) unplugged from N32/2.
Press switch (S92s2):
raise front

lower front






Open connector (5) and connect to N32/2



< 1 V

 


for 1 second:
11 - 14 V
for 1 second:
-11 to -14 V

11 - 14 V



7.7 - 8.8 V
or
11.3 - 12.7 V

Wiring,
S92,
N32/2







 

N32/2



Wiring,
M28m2
10.0 Rear raise/lower
motor (M28m2)
Resistance

4
(2)

1
(2)
N32/2






1
(5)

2
(5)

Connector (5) unplugged from N32/2




Danger of being wedged in.

Bridge sockets 4 and 1 with fused jumper wire
124 589 37 63 00.
Motor (M28m2) runs. M28m2
11.0 Backrest fore/aft
switch (S92s5)
Resistance

4
(1)
N32/2


1
(1)
Connector (1) unplugged from N32/2.

Press switch (S92s5):
forward
rearward


approx. 2.2 k


approx. 43
approx. 16

Wiring,
S92
12.0 Backrest fore/aft
motor (M28m5)
Voltage supply

Up to 11/96


2
(8)

 

 

 

 

5
(8)


3
(8)

N32/2








N32/2



N32/2



1
(8)

 

 

 

 

4
(8)


4
(8)

Connector (1) plugged in at N32/2.
Connector (8) unplugged from N32/2.
Press switch (S92s5):
forward
rearward



 

< 1 V


11 - 14 V
-11 to -14 V


approx. 5 V



approx. 5 V

 Wiring,
S92,
N32/2
[12.0] Rear raise/lower
motor (M28m5)
Voltage supply
Hall sensor

As of 12/96


2
(8)

 

 

 

 


4
(8)


4
(8)

N32/2








 



N32/2



N32/2



1
(8)

 

 

 




5
(8)


5
(8)

Connector (1) plugged in at N32/1.
Connector (8) unplugged from N32/2.
Press switch (S92s5):
raise front

lower front






Open connector (8) and connect to N32/2.

< 1 V




 

for 1 second:
11 - 14 V
for 1 second:
-11 to -14 V

11 - 14 V



7.7 - 8.8 V
or
11.3 - 12.7 V

Wiring,
S92,
N32/2







 

N32/2


Wiring,
M28m5
13.0 Backrest fore/aft
motor (M28m5)

4
(2)

1
(2)
N32/2





1
(8)

2
(8)

Connector (2) and (8) unplugged from N32/2.




Danger of being wedged in.

Bridge sockets 4 and 1 with fused jumper wire
124 589 37 63 00
Motor (M28m5) runs. M28m5,
Wiring.
14.0 Head restraint raise/lower
switch (S92s4)
Resistance

4
(1)
N32/2


2
(1)
Connector (1) unplugged from N32/2.

Press switch (S92s4):
raise
lower


approx. 2.2 k


approx. 156
approx. 75

Wiring,
S92
15.0 Head restraint raise/lower motor (M28m4)
Voltage supply

Up to 11/96


4
(9)

 

 

 

 

5
(9)


3
(9)

N32/2






 


N32/2



N32/2



1
(9)

 

 

 

 

2
(9)


2
(9)

Connector (1) plugged in at N32/2.
Connector (9) unplugged from N32/2.
Press switch (S92s4):
raise
lower

 

 

< 1 V



-11 to -14 V
11 - 14 V


approx. 5 V



approx. 5 V

 Wiring,
S92,
N32/2
[15.0] Head restraint raise/lower motor (M28m4)
Voltage supply
Hall sensor

As of 12/96


4
(9)

 

 



 

2
(9)


2
(9)

N32/2








 

N32/2



N32/2



1
(9)

 

 

 



5
(9)


5
(9)

Connector (1) plugged in at N32/1.
Connector (9) unplugged from N32/2.
Press switch (S92s4):
raise

lower






Open connector (9) and connect to N32/2

< 1 V


 


for 1 second:
-11 to -14 V
for 1 second:
11 - 14 V

11 - 14 V


7.7 - 8.8 V
or
11.3 - 12.7 V

Wiring,
S92,
N32/2










N32/2



Wiring,
M28m4
16.0 Head restraint raise/lower motor (M28m4)
Resistance


2
(2)

1
(2)

N32/2







1
(9)

4
(9)

Connector (9) unplugged from N32/2.



Danger of being wedged in.

Bridge sockets 2 and 1 with fused jumper wire
124 589 37 63 00
Motor (M28m4) runs. Wiring,
M28m4
17.0 Right front power seat switch group (S92), position memory
Resistance


1
(1)

 

 

1
(1)



1
(1)



1
(1)

S92





S92




S92




S92



4
(1)

 

 

2
(1)



5
(1)



4
(1)

Connector (1) unplugged from N32/2.
Memory button 1 switch:
Rest position:
Push button:

Memory button 2 switch:
Rest position:
Push button:

Memory button 3 switch:
Rest position:
Push button:

Green memory button switch:
Rest position:
Push button:





approx. 2.2 k approx. 167



approx. 2.2 k approx. 330



approx. 2.2 k approx. 330



approx. 2.2 k approx. 330

S92
18.0 Right front power seat
switch group (S92)
Voltage supply

4
4
4
(1)
N32/2





1
2
3
(1)
Connector (1) unplugged from N32/2.
approx. 5 V
approx. 5 V
approx. 5 V		 N32/2
19.0 Right seat proximity control module (N32/6)
Voltage supply

4
1
(4)
N32/2




2
2
(4)
 Connector (4) unplugged from N32/2.
11 - 14 V
11 - 14 V 		N32/2
20.0 Right seat proximity control module (N32/6)
Voltage supply

N32/2



4
(4)
Move backrest backward until it rests against soft top compartment wall.
Unplug connector (4) from N32/2.
Open connector and remove the wiring.
Plug the connector in again at N32/2.
> 4 V Wiring,
N32/6
21.0 Right front power seat
switch group
illumination (S92e1)
Voltage supply

5
(1)
S92




4
(1)
S92 removed.
Connector (1) unplugged from S92.
Parking lamps turned on.		 11 - 14 V Wiring.
22.0 Left backrest lock
switch (S52/3) (right seat)
Right backrest lock
switch (S52/4) (right seat)
Resistance


4

 

 

 


4

N32/8





 

N32/8


6

 

 

 


8

Left backrest lock safety package (N32/8) unplugged.
Backrest latched.
Backrest unlatched.

Backrest latched.

Backrest unlatched.




< 1
> 20 k


< 1

> 20 k

 Wiring,
S52/3,
S52/4
23.0 Right front power seat
switch group (S92)
Resistance


4
4
4
(1)

N32/2





1
2
3
(1)
Connector (1) disconnected from N32/2.
approx. 2.2 k approx. 2.2 k approx. 2.2 k		 Wiring,
S92
24.0 Right backrest lock safety package (N32/8)
Voltage supply

1
N32/8


4

N32/8 disconnected.
Ignition: ON
Note:
If N32/8 is unplugged, the acoustical warning from the left backrest lock safety package (N32/7) sounds for approx. 20 seconds.

11 - 14 V		 Wiring,
24.1
24.1 Wiring between the left and right backrest lock safety package


5
N32/8 N32/7

 

7

Left and right backrest lock safety packages unplugged. < 1 Wiring.
25.0 Right backrest lock safety package (N32/8)
Signal output for automatic latch

N32/2


3
(4)
Connector (4) unplugged from N32/2.
Backrest unlatched.
Both doors closed.
Ignition: ON




 


> 4 V

Wiring,
N32/8
26.0 Seat belt/backrest lock reminder lamp (A1e9)
Ignition: ON
Start engine.
Right backrest unlatched.
Both doors closed.		 Reminder lamp must illuminate. If the nominal value is obtained:
N32/8,
Wiring.

If the nominal value is not obtained:
A1e9,
Wiring.
27.0 Warning signal from left backrest lock safety
package (N32/7) and from right backrest lock safety
package (N32/8)
N32/8 unplugged.
Connector N32/8 removed.
Open connector and remove socket 3.
Plug N32/8 into connector again.
Ignition: ON
Start engine
Left and right backrest latched.
Both doors closed.
Reminder lamp goes out. If the nominal value is not obtained:
N32/7,
Wiring.

If the nominal value is obtained:
N32/8


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