Test scope/	Test connection			Test condition	Nominal value/	Possible cause/Remedy
1.0		Circuit 15R voltage supply Low voltage/				Ignition key in position "2".		Wiring, Battery.
2.0		SRS control module (N2/2)				Ignition key in position "2".		N2/2
3.0		> <				Ignition key in position "2".		3.1
3.1			1	R12/3	2	Remove ignition key. Remove driver airbag. Disconnect driver AB squib (R12/3). Connect ( 22, Figure 5). Set resistance of 2 . Ignition key in position "2".		Driver airbag unit. 3.2
3.2		> < (except for Model 202 as of 06/97, Model 210 as of 03/97). (Model 202 as of 07/97, Model 210 as of 04/97).	1 1	A45x1 X28/23	2 2	Remove ignition key. Connect ( 22, Figure 4). Set resistance of 2 . Ignition key in position "2".		Check horn/airbag clock spring contact (A45) for continuity. 3.4 Model 140: 3.3
3.3		> < Model 140 as of 07/97 only	3	X11/3	4	Remove ignition key. Connect ( 22, Figure 2).	2 - 5	Wiring, 3.4
3.4		> <	10	N2/2	11	Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1).	2 - 5	Wiring.
4.0		- +	6 5	N2/2	11 11	not connected. Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1).	>20 k >20 k	Wiring, Short to circuit 31, 30, 15, 15R.
5.0		> <				Ignition key in position "2".		5.1
5.1			1	R12/1	2	Remove ignition key. Disconnect left front ETR squib (R12/1) connector. Connect ( 22, Figure 5). Set resistance of 2 . Ignition key in position "2".		Seat belt retractor. 5.2
5.2		> <	1	N2/2	2	Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1).	2 - 5	Wiring. Model 129: ETR connector (left seat plug connection, X28/8) not properly connected.
6.0		- +	6 5	N2/2	1 1	not connected. Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1).	>20 k >20 k	Wiring, Short to circuit 31, 30, 15, 15R.
7.0		> <				Ignition key in position "2".		7.1
7.1			1	R12/2	2	Remove ignition key. Disconnect right front ETR squib (R12/2) connector. Connect ( 22, Figure 5). Set resistance of 2 . Ignition key in position "2".		Seat belt retractor. 7.2
7.2		> <	3	N2/2	4	Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1).	2 - 5	Wiring. Model 129: ETR connector (right seat plug connection, X28/9) not properly connected.
8.0		- +	6 5	N2/2	4 4	not connected. Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1).	>20 k >20 k	Wiring, Short to circuit 31, 30, 15, 15R.
9.0		> <				Ignition key in position "2".		9.1
9.1			1	R12/8	2	Remove ignition key. Remove glove box. Disconnect front passenger AB squib (R12/8) connector. Connect ( 22, Figure 5). Set resistance of 2 . Ignition key in position "2".		Front passenger airbag unit. Model 140: SRS test connector (X11/13) not properly connected. Model 202: Airbag intermediate connector (X28/12) not properly connected. Model 140 9.2, except Model 129, 140, 210 as of 03/97: 9.3, All models: 9.4
9.2		> <	5	X11/13	6	Remove ignition key. Disconnect X11/13. Connect ( 22, Figure 2).	2 - 5	Wiring, 9.4
9.3			1	X28/12	2	Remove ignition key. Disconnect X28/12. Connect ( 22, Figure 4). Set resistance of 2 . Ignition key in position "2".		Wiring, 9.4
9.4		> <	13	N2/2	14	Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1).	2 - 5	Wiring.
10.0		- +	6 5	N2/2	14 14	not connected. Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1).	>20 k >20 k	Wiring, Short to circuit 31, 30, 15, 15R.

	1)	Test scope/	Test connection			Test condition	Nominal value/	Possible cause/Remedy
11.0		-//- +				Ignition key in position "2". A1e15 comes on.	A1e15 goes out after approx. 4 sec.	Wiring, A1e15 shorted to +.
12.0		-//- only				Ignition key in position "2". Seat belt buckle not latched. Seat belt buckle latched.		Wiring, Open/short circuit to circuit 31, Left ESA connector block (X55/3) not properly connected.
12.1		only - +	6 5	N2/2	12 12	Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1). not connected. Seat belt buckle not latched. Seat belt buckle latched. Seat belt buckle not latched. Seat belt buckle latched.	280 - 580 70 - 279 > 20 k > 20 k	Wiring, Short to circuit 31, 30, 15, 15R, Seat belt buckle.
13.0		-//- only				Ignition key in position "2". Seat belt buckle not latched. Seat belt buckle latched.		Wiring, Open/short circuit to circuit 31, Right ESA connector block (X55/4) not properly connected.
13.1		only - +	6 5	N2/2	8 8	Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1). not connected. Seat belt buckle not latched. Seat belt buckle latched.	280 - 580 70 - 279 > 20 k	Wiring, Short to circuit 31, 30, 15, 15R, Seat belt buckle.
14.0		Squibs < > R12/1 R12/2 R12/3 R12/8 Squibs in series R12/1-R12/2 R12/1-R12/3 R12/1-R12/8 R12/2-R12/3 R12/2-R12/8 R12/3-R12/8	1 3 10 13 1 1 1 3 3 10	N2/2	2 4 11 14 3 10 13 10 13 13	Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1). not connected.	2 - 5 2 - 5 3 - 5 2 - 5 > 20 k > 20 k > 20 k > 20 k > 20 k > 20 k	Wiring, Short circuit.
15.0		> < (only with left/right side airbag equipped vehicles)				connected. Ignition key in position "2".		15.1
15.1		(except Model 202 as of 06/97, Model 210 as of 03/97, Model 208) (Model 202 as of 07/97, Model 210 as of 03/97, Model 208)	1 1	X35/1 X35/41	2 2	Remove ignition key. Disconnect left front door separation point. Connect ( 22, Figure 4). Set resistance of 2 . Ignition key in position "2".		15.2
15.2			1	R12/9	2	Remove ignition key. Remove interior door panel. Connect ( 22, Figure 5). Set resistance of 2 . Ignition key in position "2".		Left side airbag, 15.3
15.3		> <	16	N2/2	17	Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1).	2 - 5	Wiring, Contacts.

1) A DTC is recognized within 4 seconds after the ignition key is turned to position "1", or if a fault is present.

		Test scope/		Test connection		Test condition	Nominal value/	Possible cause/Remedy
15.4		- +	6 5	N2/2	16 16	connected. Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1).	>20 k >20 k	Wiring, Short to circuit 31, 30, 15, 15R.
16.0		Voltage supply (only with left/right side airbag equipped vehicles).	1	A53	3	Disconnect connector at A53. Connect test cable: ( 22, Figure 6).	11 - 14 V	Wiring.
16.1		Wiring fault	N2/2 20		A53 3	Connect ( 22, Figure 6).	<1	Wiring.

	1)	Test scope/	Test connection			Test condition	Nominal value/	Possible cause/Remedy
16.2		Insulation fault -	6 5	N2/2	20 20	Connect ( 22, Figure 5). Disconnect connector at A53.	>20 k >20 k	Wiring shorted to circuit 31 Wiring shorted to circuit 30, 15, 15R.
17.0		> < (only with left/right side airbag equipped vehicles).				Ignition key in position "2".		17.1
17.1		(except model 202 as of 06/97, Model 210 as of 03/97, Model 208) (Model 202 as of 07/97, Model 210 as of 03/97, Model 208)	1 1	X35/1 X35/42	2 2	Remove ignition key. Disconnect left door separation point connector. connector. Set resistance of 2 . ( 22, Figure 3). Ignition key in position "2".		17.2

1) A DTC is recognized within 4 seconds after the ignition key is turned to position "1", or if a fault is present.

		Test scope/	Test connection			Test condition	Nominal value/	Possible cause/Remedy
17.2			1	R12/9	2	Remove ignition key. Remove door trim panel. Set resistance of 2 . ( 22, Figure 5). Ignition key in position "2".		Left side airbag, 17.3
17.3		> <	18	N2/2	19	Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1).	2 - 5	Wiring, Contacts.
17.4		- +	6 5	N2/2	18 18	connected. Remove ignition key. Disconnect N2/2 connector. Connect ( 22, Figure 1).	>20 k >20 k	Wiring, Short in wiring circuit 31, Short in wiring circuit 30, 15, 15R
18.0		Voltage supply (only with left/right side airbag equipped vehicles).	1	A54	3	Disconnect A54 connector. Connect test cable, see ( 22, Figure 6).	11 - 14 V	Wiring.
18.1		Wiring fault	N2/2 21		A54 3	Connect ( 22, Figure 1).	< 1	Wiring.
18.2		Insulation fault - +	6 5	N2/2	21 21	Connect ( 22, Figure 1). Disconnect connector at A54	>20 k >20 k	Short in wiring circuit 31, Short in wiring circuit 30, 15, 15R
19.0						Ignition key in position "2".		19.1
19.1			3 3 3	X55/4 X55/4 X28/18	4 4 4	connected. Connect ( 22, Figure 7). Set resistance of 30 k (seat occupied), use diode 1N4007 as well as 300 resistor, switched in parallel. Watch polarity!		Contact matt, 19.2
19.2			3	X55/3 X55/4	4	Front passenger seat not occupied: Front passenger seat occupied:	>70 k 30 k	Contact matt.
20.0		Voltage supply Except for Model 129: Model 129:	1 1	X55/3 X55/4 X28/18	4 4	Ignition key in position "1".	11 - 14 V	Wiring.
20.1		Data line Except for Model 129: Model 129:	N2/2 1 N2/2 15		X55/3 X55/4 3 X28/18 3	Connect ( 22, Figure 1).	< 1	Wiring.
21.0		Voltage supply (Models 129, 140, 170 only)	4	E16	1	Ignition key in position "1".	11 - 14 V	Wiring, If values are OK: E13
21.1		Dimming	4	E16	1	Ignition key in position "1". Switch on exterior lamps.	<1 V 11 - 14 V	Wiring.
21.2		Activation	N2/2 33		2	Connect ( 22, Figure 1).	<1	Wiring.

		Test scope/		Test connection		Test condition	Nominal value/	Possible cause/Remedy
22.0		Activation (Models 202, 208, 210)	N2/2 33		N72 2	Connect ( 22, Figure 1).	<1	Wiring.
22.1		Voltage supply (Model 208 only)	4	N72e1	1	Ignition key in position "1". MB child seat "Babysafe" installed. Switch on exterior lamps:	11 - 14 V 7 - 9 V	Lower control field control module (N72).