 |
Test scope |
Test connection |
Test condition |
Nominal value |
Possible cause/Remedy |
| 1.0 |
Fanfare horns H2
|
3 
horn relay socket |
K40/2
 |
 5
horn relay socket |
Remove horn relay (K40/2k6)
Bridge as shown, see Figure 1 |
Fanfare horns sound
|
2.0 ,
Values OK:
3.0 , |
| 2.0 |
Driver-side fuse and relay module box K40/2
Voltage supply for horn relay K40/2k6 |
 |
|
K40/2
3
horn relay socket |
Remove horn relay (K40/2k6)
Connect as shown, see Figure 1 |
11 - 14 V
|
2.1 ,
f4, f5
Values OK:
Wiring
H2 |
| 2.1 |
Driver-side fuse and relay module box K40/2
Voltage supply circuit 30 |
4
(C1.4)
4
(C1.4) |
K40/2
|
2
(C1.2)
3
(C1.3) |
Ignition: OFF
|
11 - 14 V
|
Wiring,
Values OK:
K40/2 |
| 3.0 |
Signal pickup and activation module (SAM) left front N10/1
respectively
Driver-side fuse and relay module box K40/2
circuit 15R for horn relay K40/2k6 |
|
|
K40/2
2
horn relay socket |
Remove horn relay (K40/2k6)
Connect as shown, see Figure 1
Ignition switch in position 1 |
11 - 14 V
|
3.1 ,
Values OK:
3.2 , |
| 3.1 |
circuit 15R |
|
|
K40/2
2
(C1.1) |
Ignition switch in position 1 |
11 - 14 V
|
Wiring
Values OK:
K40/2
N10/1 |
| 3.2 |
Horn relay K40/2k6 control (coil) |
1
horn relay socket |
K40/2
|
2
horn relay socket |
Remove horn relay (K40/2k6)
Connect as shown, see Figure 1
Ignition switch in position 1
Horn switch (S4/2):
depressed
not depressed |
11 - 14 V
< 1 V |
Wiring
S4/2
CAN between N73 and N10/1
N10/1
N73
Values OK:
K40/2k6 |
| 4.0 |
Horn switch S4/2 and wiring |
3
(B.3)
(Ground) |
N73
 |
8
(B.8) |
Remove connector B on N73
Horn switch (S4/2):
depressed
not depressed |
< 1 
> 20 k |
Wiring
A45
S4/2 |
| 5.0 |
Electronic ignition lock control module N73
Voltage supply, circuit 30 |
3
(B.3)
3
(B.3)
3
(B.3) |
|
|
Ignition: OFF
Loosen connectors A and B on N73 |
11 - 14 V
|
Wiring |
| 6.0 |
Horn relay K40/2k6
 |
|
|
|
Remove horn relay (K40/2k6) |
Horn sounds
|
Wiring
or in K40/2
Values OK and
Complaint present with ignition OFF:
K40/2k6
Values OK and
Complaint present with ignition ON:
4
CAN
K40/2
N10/1
N73 |
| 7.0 |
HHT interface, connection between N73 and diagnostic connector X11/4 |
X11/4
20
|
|
N73
14
(B.14) |
Ignition: OFF |
< 1 |
Wiring |
| 8.0 |
CAN Data line between N10/1 and N73
 |
N73
11
(B.11)
10
(B.10) |
|
N10/1
7
(2.7)
6
(2.6) |
Remove connector B on N73 and connector 2 on N10/1 |
< 1
< 1
|
Wiring
8.1 |
| 8.1 |
 |
6
(2.6) |
N10/1
|
7
(2.7) |
Remove connector 2 on N10/1 |
> 20 k
|
Wiring
8.2 |
| 8.2 |
CAN Data line High
 |
1
(4.1) |
N10/1
|
6
(2.6) |
Remove connectors 2 and 4 on N10/1 |
> 20 k
|
Wiring
8.3 |
| 8.3 |
CAN Data line Low
|
1
(4.1) |
N10/1
|
7
(2.7) |
Remove connectors 2 and 4 on N10/1 |
> 20 k
|
Wiring
8.4 |
| 8.4 |
CAN Data line High
|
2
(4.2) |
N10/1
|
6
(2.6) |
Remove connectors 2 and 4 on N10/1 |
> 20 k
|
Wiring
8.5 |
| 8.5 |
CAN Data line Low
|
2
(4.2) |
N10/1
|
7
(2.7) |
Remove connectors 2 and 4 on N10/1 |
> 20 k
|
Wiring |
Printable version
