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Volume 5.1

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LOCATION:    16.6 Airbag (AB)   >   23 Electrical Test Program - Test (driver/passenger-side airbag/side airbag/windowbag)


Electrical Test Program - Test (driver/passenger-side airbag/side airbag/windowbag)

CAUTION!
Risk of Injury when performing Diagnostic Tests and repairs on components of the SRS system.
Store both airbags and side airbags with opening surface pointing upward.
Do not expose to temperatures above 100°C.
Interrupt any electrical current from reaching the airbag unit.
Review 11/1 and 11/2
Preparation for Test:
1. Review section 0, 11, 12, 13, 20, 22, 31,
2. Review: GF91.60-P-2003A prior to performing test,
3. Fuses are OK,
4. Battery 11 - 14 V

Test scope/
Test connection
Test condition Nominal value/
Possible cause/Remedy
1.0 Circuit 15R
Voltage supply
HHT actual values
Ignition key in position "2".


Wiring,
Battery.
1.1   ARMIN control module (N2/7)
Voltage supply


32 (56)
N2/7







5
(29)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect
( 22, Figure 1),
Ignition key in position "1".
11 - 14 V Wiring.

If values are OK:
N2/7
2.0 SRS MIL (A1e15)
HHT actual values
Ignition key in position "2".
SRS MIL (A1e15)
illuminates.
SRS MIL
(A1e15) goes
out after
approx. 4 - 20
seconds.







2.1
2.1   SRS MIL (A1e15)
Function Test
Disconnect connector on
N2/7.
Start engine.

SRS MIL
(A1e15)
illuminates.
If values are OK:
N2/7
If values are not OK:
Wiring,
SRS MIL (A1e15)
3.0 Driver AB squib (R12/3)
HHT actual values


Ignition key in position "2".



3.1
3.1   Driver AB squib (R12/3)
HHT actual values

1
R12/3


2
Remove ignition key.
Remove driver AB unit,
Disconnect connector on
R12/3,
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


R12/3

3.2
3.2   Driver AB squib (R12/3)
HHT actual values

3
A45x1


4
Remove ignition key.
Disconnect connector
(A45x1),
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


Check continuitity of A45,

3.3
3.3   Driver AB squib (R12/3)
HHT actual values

1
X28/23


2
Remove ignition key.
Disconnect connector X28/23.
Connect ,
Set resistance to 3 ,
Ignition key in position "2".


Wiring.

3.4
3.4   Driver AB squib (R12/3)
Resistance


9
(33)
N2/7



10
(34)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
2 - 5 Wiring.
4.0 Driver AB squib (R12/3)
Short circuit test
-


+


32
(56)

5
(29)


N2/7








9
(33)

9
(33)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect
( 22, Figure 1).



>20 k


>20 k
Wiring,
Short circuit after circuit 31, 30,
15, 15R
5.0 Front passenger AB
squib (R12/8)
HHT actual values


Ignition key in position "2".



5.1
5.1   Front passenger AB
squib (R12/8)
HHT actual values

1
R12/8


2
Remove ignition key.
Remove glovebox insert,
Disconnect connector at
R12/8,
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


R12/8

5.2
5.2   Front passenger AB
squib (R12/8)
HHT actual values

3
X28/23


4
Remove ignition key.
Disconnect connector X28/23.
Connect ,
Set resistance to 3 ,
Ignition key in position "2".


Wiring.

5.3
5.3   Front passenger AB
squib (R12/8)
Resistance


15
(39)
N2/7



16
(40)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 2).
2 - 5 Wiring.
6.0 Front passenger AB
squib (R12/8)
Short circuit test
-


+



32
(56)


5
(29)


N2/7










16
(40)


16
(40)
Remove ignition key.
Disconnect connector on N2/7 using aid.
Connect
( 22, Figure 1).




>20 k



>20 k
Wiring,
Short circuit after circuit 31, 30,
15, 15R
7.0 Left front side airbag
squib (R12/20)
HHT actual values


Ignition key in position "2".



7.1
7.1   Left front side airbag
squib (R12/20)
HHT actual values


1
X35/41


2
Remove ignition key.
Disconnect connector at
door separation point.
Connect ,
( 22, Figure 3).
Set resistance to 3 ,
Ignition key in position "2".



Wiring,
R12/20

7.2
7.2   Left front side airbag
squib (R12/20)
HHT actual values


1
R12/20


2
Remove ignition key.
Remove door panel.
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


R12/20

7.3
7.3   Left front side airbag
squib (R12/20)
Resistance



19
(43)
N2/7



20
(44)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
2 - 5 Wiring.
8.0 Left front side airbag
squib (R12/20)
Short circuit test
-


+



32
(56)

5
(29)

N2/7







20
(44)

20
(44)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect
( 22, Figure 1).



>20 k


>20 k
Wiring,
Short circuit after circuit 31, 30, 15, 15R
9.0 Left front side airbag
squib (R12/21)
HHT actual values


Ignition key in position "2".



9.1
9.1   Left front side airbag
squib (R12/21)
HHT actual values


1
X35/42


2
Remove ignition key.
Disconnect connector at
door separation point.
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".



Wiring,
R12/21

9.2
9.2   Left front side airbag
squib (R12/21)
HHT actual values


1
R12/21


2
Remove ignition key.
Remove door panel.
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


R12/21

9.3
9.3   Left front side airbag
squib (R12/21)
Resistance



23
(47)
N2/7



24
(48)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
2 - 5 Wiring.
10.0 Left front side airbag
squib (R12/21)
Short circuit test
-


+



32
(56)

5
(29)

N2/7







24
(48)

24
(48)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect
( 22, Figure 1).



>20 k


>20 k
Wiring,
Short circuit after circuit 31, 30, 15, 15R
11.0 LR side airbag
squib (R12/11)
HHT actual values
(Only for side airbag in
rear door, as of 06/98)


Ignition key in position "2".



11.1
11.1   LR side airbag
squib (R12/11)
HHT actual values


1
X35/3


2
Remove ignition key.
Disconnect connector at
door separation point
(X35/3).
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


Wiring,
R12/11
11.2
11.2   LR side airbag
squib (R12/11)
HHT actual values


1
R12/11


2
Remove ignition key.
Remove door panel.
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


R12/11

11.3
11.3   LR side airbag
squib (R12/11)
Resistance



27
(51)
N2/7



28
(52)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
2 - 5 Wiring.
12.0 LR side airbag
squib (R12/11)
Short circuit test
-


+

(Only for side airbag in
rear door, as of 06/98)



32
(56)

5
(29)

N2/7







28
(52)

28
(52)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect
( 22, Figure 1).



>20 k


>20 k
Wiring,
Short circuit after circuit 31, 30,
15, 15R
13.0 RR side airbag
squib (R12/12)
HHT actual values
(Only for side airbag in
rear door as of 06/98)


Ignition key in position "2".



13.1
13.1   RR side airbag
squib (R12/12)
HHT actual values


1
X35/4


2
Remove ignition key.
Disconnect connector at
door separation point
(X35/4).
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".



Wiring,
R12/12

13.2
13.2   RR side airbag
squib (R12/12)
HHT actual values


1
R12/12


2
Remove ignition key.
Remove door panel.
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


R12/12

13.3
13.3   RR side airbag
squib (R12/12)
Resistance



29
(53)
N2/7



30
(54)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
2 - 5 Wiring.
14.0 RR side airbag
squib (R12/12)
Short circuit test
-


+

(Only for side airbag in
rear door, as of 06/98)



32
(56)

5
(29)

N2/7






29
(53)

29
(53)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect
( 22, Figure 1).



>20 k


>20 k
Wiring,
Short circuit after circuit 31, 30,
15, 15R
15.0 Left side airbag
sensor (A53/1)
Voltage supply

1

A53/1





3
Remove ignition key.
Disconnect connector on
A53/1.
Connect test cables,
( 22, Figure 4),
Ignition key in position "2".
Voltage cycles between
3 V and 7 V
Wiring.
15.1   Left side airbag
sensor (A53/1)
Wiring fault
N2/7

52
(76)








A53/1
3
Remove ignition key.
Disconnect connector on
A53/1.
Disconnect connector on
N2/7,
Connect ,
( 22, Figure 1).
<1 Wiring.
15.2   Left side airbag
sensor (A53/1)
Short circuit test
-


+



32
(56)


5
(29)

N2/7








52
(76)


52
(76)
Remove ignition key.
Disconnect connector on
A53/1
Disconnect connector on
N2/7 using aid.
Connect
( 22, Figure 1).



>20 k



>20 k
Wiring,
Short circuit after circuit 31, 30,
15, 15R
16.0 Right side airbag
sensor (A54/1)
Voltage supply

1

A54/1





3
Remove ignition key.
Disconnect connector on
A54/1.
Connect test cables,
( 22, Figure 4),
Ignition key in position "2".
Voltage cycles btween
3 V and 7 V
Wiring.
16.1   Left side airbag
sensor (A54/1)
Wiring fault
N2/7

54
(78)








A53/1
3
Remove ignition key.
Disconnect connector on
A53/1.
Disconnect connector on
N2/7,
Connect ,
( 22, Figure 1).
<1 Wiring.
16.2 Left side airbag
sensor (A54/1)
Short circuit test
-


+



32
(56)

5
(29)

N2/7







54
(78)

54
(78)
Remove ignition key.
Disconnect connector on
A54/1,
Disconnect connector on
N2/7 using aid.



>20 k


>20 k
Wiring,
Short circuit after circuit 31, 30,
15, 15R
17.0 Driver ETR
squib (R12/1)
HHT actual values


Ignition key in position "2".



17.1
17.1   Driver ETR
squib (R12/1)
HHT actual values


1
R12/1


2
Remove ignition key.
Disconnect connector on R12/1,
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


R12/1

17.2
17.2   Driver ETR
squib (R12/1)
Resistance



33
(57)
N2/7



34
(58)
Remove ignition key.
Disconnect connector on N2/7 using aid.
Connect ,
( 22, Figure 1).
2 - 5 Wiring
18.0 Driver ETR
squib (R12/1)
Short circuit test
-


+



32
(56)

5
(29)

N2/7








33
(57)

33
(57)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).



>20 k


>20 k
Wiring,
Short circuit after circuit 31, 30, 15, 15R
19.0 Front passenger ETR
squib (R12/2)
HHT actual values


Ignition key in position "2".



19.1
19.1   Front passenger ETR
squib (R12/2)
HHT actual values


1
R12/2


2
Remove ignition key.
Disconnect connector on
R12/2,
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


R12/2

19.2
19.2   Front passenger ETR
squib (R12/2)
Resistance



35
(59)
N2/7



36
(60)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
2 - 5 Wiring.
20.0 Front passenger ETR
squib (R12/2)
Short circuit test
-


+



32
(56)

5
(29)

N2/7







36
(60)

36
(60)0
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).



>20 k


>20 k
Wiring,
Short circuit after circuit 31, 30,
15, 15R
21.0 Left front seat belt buckle
switch (AB/ETR) (S68/3)
HHT actual values
(only )


Ignition key in position "2".

Seat belt latch is not
latched:

Seat belt latch is latched:







21.1
21.1   Left front seat belt buckle
switch (AB/ETR) (S68/3)
Resistance
(only )

1

X55/3


2
Disconnect connector
X55/3
Seat belt latch is not
latched:

Seat belt latch is latched:



80 - 210

320 - 480
S68/3
21.2
21.2   Left front seat belt buckle
switch (AB/ETR) (S68/3)
Short circuit test
-


+

(only )



32
(56)

5
(29)

N2/7







43
(67)

43
(67)
not connected.
Remove ignition key.
Seat belt latch is not
latched,
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).



80 - 210


>20 k
Wiring,
Short circuit after circuit 31, 30, 15, 15R
22.0 Right front seat belt buckle
switch (AB/ETR) (S68/4)
HHT actual values
(only )


Ignition key in position "2".

Seat belt latch is not
latched:

Seat belt latch is latched:







22.1
22.1   Right front seat belt buckle
switch (AB/ETR) (S68/4)
Resistance
(only )

1

X55/4


2
Disconnect connector
X55/4
Seat belt latch is not
latched:

Seat belt latch is latched:



80 - 210

320 - 480
S68/4
22.2
22.2   Right front seat belt buckle
switch (AB/ETR) (S68/4)
Short circuit test
-


+

(only )



32
(56)

5
(29)

N2/7







45
(69)

45
(69)
not connected.
Remove ignition key.
Seat belt latch is not
latched,
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).



80 - 210


>20 k
Wiring,
Short circuit after circuit 31, 30, 15, 15R
23.0 LR ETR squib (R12/6)
HHT actual values
(for rear side airbag only, as of 06/98)
Ignition key in position "2".

23.1
23.1   LR ETR squib (R12/6)
HHT actual values


1
R12/6


2
Remove ignition key.
Disconnect connector on
R12/6,
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


R12/6

23.2
23.2   LR ETR squib (R12/6)
Resistance


37
(61)
N2/7



38
(62)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
2 - 5 Wiring.
24.0 LR ETR squib (R12/6)
Short circuit test
-


+

(for rear side airbag only)



32
(56)

5
(29)

N2/7







37
(61)

37
(61)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).



>20 k


>20 k
Wiring,
Short circuit after circuit 31, 30, 15, 15R
25.0 RR ETR squib (R12/7)
HHT actual values
(for rear side airbag only,as of 06/98)
Ignition key in position "2".

25.1
25.1   RR ETR squib (R12/7)
HHT actual values


1
R12/7


2
Remove ignition key.
Disconnect connector on
R12/7,
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


R12/7

25.2
25.2   RR ETR squib (R12/7)
Resistance


41
(65)
N2/7



42
(66)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
2 - 5 Wiring.
26.0 RR ETR squib (R12/7)
Short circuit test
-


+

(for rear side airbag only, asof 06/98)



32
(56)

5
(29)

N2/7







41
(65)

41
(65)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).



>20 k


>20 k
Wiring,
Short circuit after circuit 31, 30, 15, 15R
27.0 Left rear side windowbag
squib (R12/22)
HHT actual values
Ignition key in position "2".

27.1
27.1   Left rear side windowbag
squib (R12/22)
HHT actual values


1
R12/22


2
Remove ignition key.
Disconnect connector on
R12/22,
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


R12/22

27.2
27.2   Left rear side windowbag
squib (R12/22)
Resistance


21
(45)
N2/7



22
(46)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
2 - 5 Wiring.
28.0 Left rear side windowbag
squib (R12/22)
Short circuit test
-


+




32
(56)

5
(29)

N2/7








21
(45)

21
(45)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).



>20 k


>20 k
Wiring,
Short circuit after circuit 31, 30, 15, 15R
29.0 Right rear side windowbag
squib (R12/23)
HHT actual values
Ignition key in position "2".

29.1
29.1   Right rear side windowbag
squib (R12/23)
HHT actual values


1
R12/23


2
Remove ignition key.
Disconnect connector on
R12/23,
Connect ,
( 22, Figure 2).
Set resistance to 3 ,
Ignition key in position "2".


R12/23

29.2
29.2   Right rear side windowbag
squib (R12/23)
Resistance


25
(49)
N2/7



26
(50)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
2 - 5 Wiring.
30.0 Right rear side windowbag
squib (R12/23)
Short circuit test
-


+




32
(56)

5
(29)

N2/7







25
(49)

25
(49)
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).



>20 k


>20 k
Wiring,
Short circuit after circuit 31, 30, 15, 15R
31.0 Front passenger seat
occupied recognition with
automatic child seat
recognition (ACSR) (B48)
Voltage supply

4

X55/4





1
Disconnect connector on
X55/4.
Ignition key in position "1".
11 - 14 V Wiring.
If values are OK:
31.1
31.1   Front passenger seat
occupied recognition with
automatic child seat
recognition (ACSR) (B48)
Short circuit test
-


+



X55/4
3


3










N2/7

32
(56)

5
(29)
Remove ignition key.
Disconnect connector on
X55/4
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).



>20 k


>20 k
Short circuit to positive,
Short circuit to ground.

If values are OK:
31.2
31.2   Front passenger seat
occupied recognition with
automatic child seat
recognition (ACSR) (B48)
Data line






X55/4
3








N2/7

46
(70)
Remove ignition key.
Disconnect connector on
X55/4
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).




<1
Wiring.
B48
32.0 Non-USA vehicles only,
continue to next test step.
     
32.1 Non-USA vehicles only,
continue to next test step.
     
32.2 Non-USA vehicles only,
continue to next test step.
     
33.0 Automatic child seat
recognition warning
lamp (N72e1)
HHT actual values
Position the version coded
and approved MB child
seat "Babysafe" onto the
front passenger seat facing
forward/rearward.
Ignition key in position "2".
Wait approx. 15 seconds.
N72e1
illuminates.


N72e1



33.1
33.1   Automatic child seat
recognition warning
lamp (N72e1)
Continuitity Check

-//-


N2/7

58
(82)









N72
2
Remove ignition key.
Disconnect connector on
lower control field control
module (N72).
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
<1

Line from N2/7 to N72


33.2
33.2   Automatic child seat
recognition warning
lamp (N72e1)
Short circuit test
-



+




32
(56)


5
(29)


N2/7









58
(82)


58
(82)
Remove ignition key.
Disconnect connector on
lower control field control
module (N72).
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).





>20 k



>20 k
Short circuit after circuit 31, 30, 15, 15R
34.0   Diagnostic line
(N2/7)
Continuitity Check


N2/7

8
(32)




X11/4
30
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
For pin connector information see:
AD00.00-P-2000-02A
<1 Wiring.
35.0 Crashoutput (digital)
Restraint system control module (N2/7) to
Emergency call system control module
(TELE AID) (A35/8)
Continuitity Check

As of 07/99
N2/7
59
(83)



A35/8
14
Remove ignition key.
Disconnect connector at A35/8.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
<1 Wiring,

Readout DTC memory in A35/8

see 35.1
35.1 Crashoutput (digital)
Restraint system control module (N2/7) to
Emergency call system control module
(TELE AID) (A35/8)
Short circuit check

-



+




32
(56)


5
(29)


N2/7









59
(83)


59
(83)
Remove ignition key.
Disconnect connector at A35/8.
Disconnect connector at N2/7.




>20 k



>20 k
Wiring,
Short circuit after circuit 31, 30, 15, 15R
36.0 Crashoutput (digital)
Restraint system control module (N2/7) to
Injection system control module (N3)
Continuitity Check

Diesel



Gasoline






N2/7

7
(31)


7
(31)
















N3/9
2.17


N3/10
D.16
Remove ignition key.
Disconnect connector on
N2/7 using aid.
Connect ,
( 22, Figure 1).
<1 Wiring.