 |
Test scope |
Test connection |
Test condition |
Nominal value |
Possible cause/Remedy |
| 1.0 |
Left/right audio power
amplifier (N40/3)
Voltage supply |
9  |
N40/3
 |
 26 |
Disconnect connector from N40/3.
Radio (A2): OFF
|
11 - 14 V
|
Fuse 12 in fuse and relay
box (F1),
Fuse in N40/3,
Ground (W6, W7),
Wiring,
Values OK:
1.1 |
| 1.1 |
Control voltage from radio (A2) |
9 |
N40/3
|
8 |
Disconnect connector from N40/3.
Radio (A2): ON |
11 - 14 V |
Wiring,
Loudspeaker signal from radio (A2)
Values OK:
2 |
| 2.0 |
Left/right audio power amplifier (N40/3)
Loudspeaker signal from
radio (A2)
Left front:
Right front:
Left rear:
right rear: |
10
1
3
4 |
|
|
Disconnect connector from N40/3.
Radio (A2): ON
Turn volume control to maximum. |
> 0.2 V~
Short voltage surges permitted |
Wiring,
Radio (A2), see 3.1  23 ,
AD82.60 in WIS
|
| 3.0 |
Left door speaker (H4/5) |
15
9
9 |
|
|
Disconnect connector from N40/3.
Radio (A2): OFF |
1.5 - 2.5 
|
Wiring,
Connectors,
H4/5
Values OK:
N40/3 |
| 4.0 |
Left front door speaker group (H4/1) |
9
9
21 |
|
|
Disconnect connector from N40/3.
Connect function generator and set a frequency of 100 to 10,000 Hz with a voltage amplitude of 2 V.
Radio (A2): OFF
Voltage amplitude changes result in volume changes; Frequency changes result in tone changes. |
The set frequency can be heard via the speakers. |
H4/1
Wiring,
Connectors,
Values OK:
N40/3 |
| 5.0 |
Left rear speaker (H4/7)
Model 208.3 |
12
9
9 |
|
|
Disconnect connector from N40/3.
Radio (A2): OFF
|
1.5 - 2.5
|
H4/7
Wiring,
Values OK:
N40/3 |
| 6.0 |
Right door speaker (H4/6) |
17
9
9 |
H4/6
|
|
Disconnect connector from N40/3.
Radio (A2): OFF |
1.5 - 2.5
|
Wiring,
Connectors,
H4/6
Values OK:
N40/3 |
| 7.0 |
Right front door speaker group (H4/1) |
9
9
14 |
|
|
Disconnect connector from N40/3.
Connect function generator and set a frequency of 100 to 10,000 Hz with a voltage amplitude of 2 V.
Radio (A2): OFF
Voltage amplitude changes result in volume changes; Frequency changes result in tone changes. |
The set frequency can be heard via the speakers. |
H4/2
Wiring,
Connectors,
Values OK:
N40/3 |
| 8.0 |
Right rear speaker (H4/8)
Model 208.3 |
11
9
9 |
|
|
Disconnect connector from N40/3.
Radio (A2): OFF
|
1.5 - 2.5
|
H4/8.
Wiring,
Values OK:
N40/3 |
| 9.0 |
Subwoofer speaker (H4/29)
Model 208.4 |
|
H4/29
|
|
Radio (A2): OFF
Remove speaker and disconnect speaker connector (H4/29x1). Measure directly on speaker. |
around 4
|
H4/29.
Values OK:
Wiring,
Connectors,
N40/3 |
Printable version
