 |
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 |
Radio (A2): OFF
Disconnect N40/3. |
11 - 14 V |
Fuse F4-16,
Fuse in N40/3 (Figure 1),
Ground (W6),
Wiring,
1.1 ,
If nominal value is OK:
Replace N40/3.
|
| 1.1 |
Control voltage from radio (A2) |
9 |
N40/3
|
8 |
Disconnect N40/3.
Radio (A2): ON |
11 - 14 V |
Wiring,
Radio (see section 3.1  23 ),
1.2.
|
| 1.2 |
Speaker signal from radio (A2)
left front:
right front:
left rear:
right rear: |
10
1
3
4 |
|
|
Disconnect N40/3.
Turn volume control to maximum.
Radio (A2): ON
|
> 0.2 V~
A momentary lower value is permissible. |
Wiring,
Radio (see section 3.1 23).
|
| 2.0 |
Left front door speaker
group (H4/1) |
21
9
21 |
|
|
Radio (A2): OFF
Disconnect N40/3.
|
Up to 06/95:
0.6 - 1.2 
As of 07/95:
1.5 - 2.5
|
Wiring,
H4/1,
If nominal values are OK:
Replace N40/3.
|
| 3.0 |
Right front door speaker
group (H4/2) |
14
9
14 |
|
|
Radio (A2): OFF
Disconnect N40/3.
|
Up to 06/95:
0.6 - 1.2
As of 07/95:
1.5 - 2.5
|
Wiring,
H4/2,
If nominal values are OK:
Replace N40/3.
|
| 4.0 |
Sedan
Left rear door speaker (H4/3)
Coupé
Left front door speaker (H4/5) |
15
9
15
|
|
|
Radio (A2): OFF
Disconnect N40/3.
|
Up to 06/95:
3.2 - 4.0
As of 07/95:
1.5 - 2.5
|
Wiring,
H4/3 or H4/5,
If nominal values are OK:
Replace N40/3.
|
| 5.0 |
Sedan
Right rear door speaker (H4/4)
Coupé
Right front door speaker (H4/6) |
17
9
17 |
|
|
Radio (A2): OFF
Disconnect N40/3.
|
Up to 06/95:
3.2 - 4.0
As of 07/95:
1.5 - 2.5
|
Wiring,
H4/4 or H4/6,
If nominal values are OK:
Replace N40/3.
|
| 6.0 |
Left rear door speaker group (H4/7) |
12
9
12 |
|
|
Radio (A2): OFF
Disconnect N40/3. |
0.6 - 1.4
|
Wiring,
6.1 ,
If nominal values are OK:
Replace N40/3.
|
| 6.1 |
Left rear door speaker group (H4/7)
Individual speakers (H4/7h1 or H4/7h2) |
|
H4/7h1
or
H4/7h2
|
|
Radio (A2): OFF
Disconnect speaker group connectors.
|
1.8 - 2.4 |
H4/7h1 or H4/7h2.
|
| 7.0 |
Right rear door speaker
group (H4/8) |
11
9
11 |
|
|
Radio (A2): OFF
Disconnect N40/3.
|
0.6 - 1.4
|
Wiring,
7.1 ,
If nominal values are OK:
Replace N40/3.
|
| 7.1 |
Right rear door speaker
group (H4/8)
Individual speakers (H4/8h1 or H4/8h2) |
|
H4/8h1
or
H4/8h2
|
|
Radio (A2): OFF
Disconnect speaker group connectors.
|
1.8 - 2.4 |
H4/8h1 or H4/8h2.
|
| 8.0 |
Center fill tweeter speaker (H4/11) |
24
9
24 |
|
|
Radio (A2): OFF
Disconnect N40/3.
|
3.6 - 4.2
|
Wiring,
H4/11,
If nominal values are OK:
Replace N40/3.
|
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