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Volume 5

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LOCATION:    15.4 Model 208, 210 as 3/97 Electric Seat Adjustment (ESA)   >   23 Electrical Test Program - Test


Electrical Test Program - Test

Test scope Test connection

Test condition

Nominal value

Possible cause/Remedy
1.0 Fore/aft switch
group (S91/2s1, S92/2s1) with memory
Resistance


5
(5)
N69/1
N69/2



3
(5)
Disconnect connector (5) from N69/1 or N69/2.

S91/2s1 or S92/2s1:
Pressed forward

S91/2s1 or S92/2s1:
Pressed aft






approx. 43



approx. 16

Wiring,
S91/2 or S92/2
2.0 Fore/aft motor (M27m1 or M28m1)
Voltage supply


2
(5)


N32/1
N32/2






1
(5)

Connector 1 on N32/1, N32/2 connected.
Backrest to vertical position.
Connector 5 disconnected from N32/1, N32/2

Fore/aft switch (S91/2s1, S92/2s1) pressed forward.

Fore/aft switch (S91/2s1, S92/2s1) pressed aft.


< 1 V








11 - 14 V for approx. 1 sec.


-11 to -14 V for approx. 1 sec.
Wiring,
N32/1, N32/2



  Hall-sensor
Voltage supply


5
(5)
N32/1
N32/2


6
(5)
 

11 - 14 V


N32/1, N32/2
  Hall-sensor



5
(5)
N32/1
N32/2


6
(5)
Connector 5 connected to N32/1, N32/2. Take reading at socket with connector 5 connected. 7.7 - 8.8 V
or
11.3 - 12.7 V
Wiring,
M27m1 or M28m1
3.0 Fore/aft motor (M27m1 or M28m1)

1
(5)

2
(5)
N32/1
N32/2





2
(1)

11
(1)
Disconnect connectors 1 and 5 from N32/1 or N32/2.

CAUTION!
Injury hazard due to crushing!
Bridge sockets 1 and 2 with fused jumper wire
124 589 37 63 00
Motor (M27m1, M28m1) runs. Wiring,
M27m1 or M28m1




4.0 Front raise/lower switch (S91/2s3, S92/2s3)
Resistance


7
(5)
N69/1
N69/2


5
(5)
Disconnect connector (5) from N69/1, N69/2.

S91/2s3 or S92/2s3:
Press raise

S91/2s3 or S92/2s3:
Press lower






approx. 43



approx.16
Wiring,
S91/2 or S92/2
5.0 Front raise/lower motor (M27m3)
Voltage supply


2
(6)


N32/1
N32/2






1
(6)

Connector 1 on N32/1, N32/2 connected.
Connector 6 disconnected from N32/1, N32/2

Raise/lower switch (S91/2s3, S92/2s3) press raise

Raise/lower switch (S91/2s3, S92/2s3) press lower


< 1 V






11 - 14 V for approx. 1 sec.


-11 to -14 V for approx. 1 sec.
Wiring,
N32/1, N32/2



  Hall-sensor
Voltage supply


5
(6)
N32/1
N32/2


6
(6)
 

11 - 14 V


N32/1, N32/2
  Hall-sensor



5
(6)
N32/1
N32/2


6
(6)
Connector 6 connected to N32/1, N32/2. Take reading at socket with connector 6 connected. 7.7 - 8.8 V
or
11.3 - 12.7 V
Wiring,
M27m3 or M28m3
6.0 Front raise/lower motor (M27m3 or M28m3)

3
(1)

11
(1)
N32/1
N32/2





1
(6)

2
(6)
Disconnect connectors 1 and 6 from N32/1 or N32/2

CAUTION!
Injury hazard due to crushing!
Bridge sockets 3 and 1 with fused jumper wire
124 589 37 63 00
Motor (M27m3, M28m3) runs. Wiring,
M27m3, M28m3




7.0 Rear raise/lower switch (S91/2s2, S92/2s2)
Resistance


3
(5)
N69/1
N69/2


5
(5)
Disconnect connector (5) from N69/1, N69/2

S91/2s2 or S92/2s2:
Press raise

S91/2s2 or S92/2s2:
Press lower






approx. 169


approx. 75
Wiring,
S91/2 or S92/2
8.0 Raise/lower motor
(M27m2 or M28m2)
Voltage supply


2
(4)


N32/1
N32/2






1
(4)

Connector 1 on N32/1, N32/2 connected.
Connector 4 disconnected from N32/1, N32/2

Raise/lower switch (S91/2s3, S92/2s3) pressed to raise.

Raise/lower switch (S91/2s3, S92/2s3) pressed to lower.


< 1 V






11 - 14 V for approx. 1 sec.


-11 to - 14 V for approx. 1 sec.
Wiring,
N32/1, N32/2



  Hall-sensor
Voltage supply


5
(4)
N32/1
N32/2


6
(4)
 

11 - 14 V


N32/1, N32/2
  Hall-sensor



5
(4)
N32/1
N32/2


6
(4)
Connector 4 connected to N32/1, N32/2. Take reading at socket with connector 4 connected. 7.7 - 8.8 V
or
11.3 - 12.7 V
Wiring,
M27m2, M28m2
9.0 Front raise/lower motor (M27m2 or M28m2)

1
(4)

2
(4)
N32/1
N32/2





3
(1)

11
(1)
Disconnect connectors 1 and 4 from N32/1 or N32/2

CAUTION!
Injury hazard due to crushing!
Bridge sockets 3 and 1 with fused jumper wire
124 589 37 63 00
Motor (M27m2, M28m2) runs. Wiring,
M27m2 or M28m2




10.0 Backrest/fore (S91/2s5, S92/2s5)
Resistance


6
(5)
N69/1
N69/2


5
(5)
Disconnect connector (5) from N69/1, N69/2

S91/2s5 or S92/2s5:
Pressed foreward

S91/2s5 or S92/2s5:
Pressed aft






approx. 43



approx. 16
Wiring,
S91/2 or S92/2
11.0 Fore/aft motor (M27m5 or M28m5)
Voltage supply


2
(7)


N32/1
N32/2






1
(7)

Connector 1 on N32/1, N32/2 connected.
Connector 7 disconnected from N32/1, N32/2.

Fore/aft switch (S91/2s5, S92/2s5) pressed forward.

Fore/aft switch (S91/2s5, S92/2s5) pressed aft.


< 1 V






11 - 14 V for approx. 1 sec.


- 11 to -14 V for approx. 1 sec.
Wiring,
N32/1, N32/2



  Hall-sensor
Voltage supply


5
(7)
N32/1
N32/2


6
(7)
 

11 - 14 V


N32/1, N32/2
  Hall-sensor



5
(7)
N32/1
N32/2


6
(7)
Connector 7 connected to N32/1, N32/2. Take reading at socket with connector 7 connected. 7.7 - 8.8 V
or
11.3 - 12.7 V
Wiring,
M27m5 or M28m5
12.0 Backrest fore/aft motor (M27m5 or M28m5)

4
(7)

2
(7)
N32/1
N32/2





3
(1)

11
(1)
Disconnect connectors 1 and 7 from N32/1 or N32/2.
Backrest to verical position.

CAUTION!
Injury hazard due to crushing!
Bridge sockets 4 and 3 with fused jumper wire
124 589 37 63 00
Motor (M27m5, M28m5) runs. Wiring,
M27m5 or M28m5




13.0 Front raise/lower switch (S91/2s4, S92/2s4)
Resistance


5
(5)
N69/1
N69/2


7
(5)
Disconnect connector (5) from N69/1, N69/2.

S91/2s4 or S92/2s4:
Pressed raise

S91/2s4 or S92/2s4:
Pressed lower






approx. 170


approx.75
Wiring,
S91/2 or S92/2
14.0 Head restraint raise/lower motor (M27m4 or M28m4)
Voltage supply


1
(7)


N32/1
N32/2






4
(7)

Connector 1 on N32/1, N32/2 connected.
Connector (7) disconnected from N32/1, N32/2.

Raise/lower switch (S91/2s4, S92/2s4) press to raise.

Raise/lower switch (S91/2s4, S92/2s4) press to lower.


< 1 V






- 11 to - 14 V for approx. 1 sec.


11 - 14 V for approx. 1 sec.
Wiring,
S91/2, S92/2,
N32/1, N32/2



  Hall-sensor
Voltage supply


5
(7)
N32/1
N32/2


3
(7)
 

11 - 14 V


N32/1, N32/2
  Hall-sensor



2
(7)
N32/1
N32/2


3
(7)
Connector 7 connected to N32/1, N32/2. Take reading at socket with connector 7 connected. 7.7 - 8.8 V
or
11.3 - 12.7 V
Wiring,
M27m4 or M28m4
15.0 Head restraint raise/lower motor
(M27m4 or M28m4)


1
(7)

4
(7)
N32/1
N32/2





3
(1)

11
(1)
Disconnect connector (1 and 7) from N32/1 or N32/2.

CAUTION!
Injury hazard due to crushing!
Bridge sockets 1 and 3 with fused jumper wire
124 589 37 63 00
Motor (M27m4, M28m4) runs. Wiring,
M27m4 or M28m4




16.0 Backrest unlocking
(M27m8 or M28m8)
(Motor)
(Model 208 only)


5
(8)
N32/1
N32/2


1
(8)
Ignition: OFF.
Backrest locked in upright position,
Take reading at connector

S91/3:
Activated

S91/3:
Not activated





11 - 14 V for
approx. 4 secs.


< 1V
Wiring,
19.0
M27m8 or M28m8
17.0 Left front door ESA switch group (S91/2, S92/2)
Resistance





3



N69/1
N69/2





5
Disconnect connector (5) from N69/1, N69/2.



Button 1:
Rest position

Press button:







> 20K

approx. 330
Wiring,
S91/2 or S92/2
   

7

N69/1
N69/2



5



Button 2:
Rest position

Press button:



> 20K

approx. 330

 
   

6

N69/1
N69/2



5



Button 3:
Rest position

Press button:



> 20K

approx. 169

 
   

6

N69/1
N69/2



5



Green button:
Rest position

Press button:



> 20K

approx. 330

 
18.0 Left/right front door ESA switch group with memory
(S91/2, S92/2)
Voltage supply


5
(5)

N69/1
N69/2





1 (5)

Parking lights: ON 9 - 13 V N69/1, N69/2




19.0 Left front seatback release microswitch
(S91/3, S92/3)

(Model 208 up to 6/98 only)


2
(8)
N32/1
N32/2


6
(8)
Disconnect connector 1 from N32/1, N32/2

Backrest:
Locked

Unlocked







> 20 K

< 1 K
Wiring,
S91/3, S92/3







20.0 Left/right front seatback release microswitch
(S91/3, S92/3) with
left/right front hibernation microswitch (S91/1s2, S92/1s2)
Resistance test of switching circuit
(Model 208 as of 06/98 only)


2
(8)
N32/1
N32/2


6
(8)
Ignition: OFF
Disconnect connector 1 from N32/1, N32/2

Backrest:
Vertical (locked)

Pull on unlock lever of seatback, seatback remains in vertical position.






> 20 K




< 1 K
Wiring,
S91/3, S92/3







If values are OK;
20.1
20.1 Left/right front seatback release microswitch
(S91/3, S92/3) with
left/right front hibernation microswitch (S91/1s2, S92/1s2)
Resistance test of switching circuit


2
(8)

N69/1
N69/2





6 (8)

Ignition: OFF
Tilt backrest forward approx. 20 degrees.


< 1
S91/1s2, S92/1s2




21.0 Left/right front seatback inclination microswitch
(S91/1, S92/1)

(Model 208 only)


1
(9)
N32/1
N32/2


2
(9)
Disconnect connector 1 from N32/1, N32/2

Backrest:
Locked (vertical):

Tilted forward:





> 20 K

< 1 K
Wiring,
S91/1, S92/1