 |
 |
Test scope |
Test connection |
Test condition |
Nominal value |
Possible cause/Remedy |
| 1.0 |
|
A/C pushbutton control module (N22)
Voltage supply
Circuit 30
|
19 
|
N22
 |
 8
|
on right connector
see  22
|
11 - 14 V
|
Wiring,
Circuit 31,
1.1 |
| 1.1 |
|
Circuit 30
|
|
N22
|
8
|
|
11 - 14 V
|
Wiring. |
| 2.0 |
|
Voltage supply
Circuit 15
|
19
|
N22
|
9
|
on right connector
see 22
Ignition: ON
|
11 - 14 V
|
Wiring.
|
| 3.0 |
|
Voltage supply
Circuit 15x
|
19
|
N22
|
7
|
on right connector
see 22
Ignition: ON
|
11 - 14 V
|
Wiring.
|
| 4.0 |
|
In-car temperature
sensor (B10/4)
with aspirator
Resistance
|
23
|
N22
 |
16
|
Ignition: OFF
on left connector
see 22
Disconnect N22 from .
|
oC  k 
10 19.0 - 21.0
20 12.0 - 13.0
30 7.5 - 8.5
45 4.0 - 4.5
|
Wiring,
B10/4
|
| 5.0 |
     |
Evaporator temperature
sensor (B10/6)
Resistance
|
23
|
N22
|
19
|
Ignition: OFF
on left connector
see 22
Disconnect N22 from .
|
oC k
10 5.2 - 5.8
20 3.2 - 3.6
30 2.0 - 2.3
45 1.1 - 1.25
|
Wiring,
B10/6 |
| 6.0 |
|
Refrigerant temperature sensor (B12/1)
Resistance
|
23 |
N22
|
19
|
Ignition: OFF
on left connector
see 22
Disconnect N22 from .
|
° C k
20 < 13
40 < 5.5
50 < 3.7
60 < 2.5
70 < 1.8
|
Wiring,
B10/6 |
| 7.0 |
|
Heater core temperature sensor (B10/2), left
Resistance
|
23
|
N22
|
17
|
Ignition: OFF
on left connector
see 22
Disconnect N22 from .
|
oC k
10 19.0 - 21.2
20 11.9 - 13.2
30 7.7 - 8.4
45 4.2 - 4.6
|
Wiring,
B10/2 |
| 8.0 |
|
Refrigerant pressure
sensor (B12)
Voltage supply
|
23
|
N22
|
31
|
on left connector
see 22
Ignition: ON
|
4.75 - 5.25 V
|
Wiring,
B12,
N22
|
| 9.0 |
|
Diagnostic output
Voltage |
|
N22
|
15
|
on left connector
see 22
Ignition: ON
|
11 - 14 V
|
Wiring,
N22
|
| 10.0 |
 |
Serial Interface (K1)
Voltage |
23 |
N22
|
24 |
on left connector
see 22
Ignition: ON |
> 4 V
|
Wiring,
See 21 |
| 11.0 |
|
"Cold" function indicator lamp (LED, blue) (N18/2)
Voltage |
19 |
N22
|
15 |
on left connector
see 22
Ignition: ON
Blue LED in button is illuminated
|
> 3.5 V
|
Wiring,
N18/2 |
| 12.0 |
|
"Warm" function indicator lamp (LED, red) (N18/2)
Voltage |
19 |
N22
|
15 |
on left connector
see 22
Ignition: ON
Red LED in button is illuminated
|
> 3.5 V
|
Wiring,
N18/2 |
| 13.0 |
|
Soft top activation
Voltage |
9 |
N22
|
26 |
on left connector
see 22
Ignition: ON |
|
Wiring. |
| |
|
|
|
|
|
Soft top closed |
> 0.1 V |
|
| |
|
|
|
|
|
Soft top open
|
> 10 V |
|
| 14.0 |
|
"Cold" pushbutton (N18/2s1)
Voltage |
30
|
N22
|
8
|
on left connector
see 22
Ignition: ON
Press and hold blue pushbutton at center vent
|
10 V
|
Wiring,
N18/2
|
| 15.0 |
|
"Warm" pushbutton (N18/2s1)
Voltage |
19
|
N22
|
8
|
on left connector
see 22
Ignition: ON
Press and hold red pushbutton at center vent
|
8.5 V
|
Wiring,
N18/2
|
| 16.0 |
|
Auxiliary fan (M4)
Activation
Voltage |
19
|
N22
|
16
|
on right connector
see 22
Ignition: ON
Press  and  > 10 secs.
End test : Press and > 10 secs.
|
> 2 V
Auxliary fan (M4) runs. |
Wiring,
N22,
N65/1
|
| 17.0 |
|
A/C Pushbutton control module (N22), 12 V output
Voltage |
19
|
N22
|
18
|
on right connector
see 22
Ignition: ON
|
11 - 14 V |
Wiring,
N22
|
| 18.0 |
 |
Coolant circulation pump (M13)
Amperes |
18
19 |
|
8
20 |
on right connector
see 22
Ignition: OFF
Disconnect N22 from .
|
< 1 A |
Wiring,
M13
|
| 19.0 |
 |
Automatic A/C
monovalve (Y19)
Resistance |
18
|
Y19
|
18
|
Ignition: OFF
on right connector
see 22
Disconnect N22 from .
|
8- 15 |
Wiring,
Y19
|
| 20.0 |
|
Blower regulator (A32n1)
Control
Voltage |
19 |
N22
|
1 |
on right connector
see 22
Ignition: ON |
|
Wiring,
A32
|
| |
|
|
|
|
|
 MIN |
> 0.7 V |
|
| |
|
|
|
|
|
MA |
> 0.5 V |
|
| 21.0 |
 |
A/C compressor (A9) activation
Voltage |
19 |
N22
|
25 |
on right connector
see 22
Engine: At Idle |
|
Wiring,
N22
|
| |
|
|
|
|
|
A/C compressor:  |
< 1 V |
|
| |
|
|
|
|
|
A/C compressor:  |
11 - 14 V |
|
| 22.0 |
|
Switchover valve
block (Y11)
|
19
|
N22
|
23
|
on right connector
see 22
Ignition: ON |
> 8.0 V
|
Wiring,
Y11
|
| 23.0 |
|
Serial Interface (K2)
Voltage
|
23 |
N22
|
24 |
on right connector
see 22
Ignition: ON |
> 1.5 V
|
Wiring,
see 21 |
| 24.0 |
 |
Left air outlet feedback potentiometer (R23/1)
Voltage
|
19 |
N22
|
27 |
on right connector
see 22
Ignition: ON
Left adjustment wheel:
End stop right (closed)
End stop left (open) |
0.7 - 1.1 V
3.5 - 4.8 V
(infinitely variable)
|
Wiring,
R23/1,
Vacuum actuator 46 |
| 25.0 |
|
Center air outlet feedback potentiometer (R23/3)
Voltage
|
19 |
N22
|
11 |
on right connector
see 22
Ignition: ON
Center adjustment wheel:
End stop right (closed)
End stop left (open) |
0.8 - 1.2 V
3.5 - 4.5 V
(infinitely variable)
|
Wiring,
R23/3,
Vacuum actuator 47 |
| 26.0 |
|
Right air outlet feedback potentiometer (R23/2)
Voltage
|
19 |
N22
|
2 |
on right connector
see 22
Ignition: ON
Right adjustment wheel:
End stop right (closed)
End stop left (open) |
0.8 - 1.2 V
3.5 - 4.5 V
(infinitely variable)
|
Wiring,
R23/2,
Vacuum actuator 48 |
| 27.0 |
|
Left air outlet potentiometer
Voltage
|
19 |
N22
|
28 |
on right connector
see 22
Ignition: ON
Left adjustment wheel:
End stop right (closed)
End stop left (open) |
0.6 - 0.9 V
4.0 - 4.5 V
(infinitely variable)
|
Wiring,
N18/2
|
| 28.0 |
|
Center air outlet potentiometer
Voltage
|
19 |
N22
|
12 |
on right connector
see 22
Ignition: ON
Center adjustment wheel:
End stop right (closed)
End stop left (open) |
0.6 - 0.9 V
3.5 - 4.5 V
(infinitely variable)
|
Wiring,
N18/2 |
| 29.0 |
|
Right air outlet potentiometer
Voltage
|
19 |
N22
|
3 |
on right connector
see 22
Ignition: ON
Right adjustment wheel:
End stop right (closed)
End stop left (open) |
0.6 - 0.9 V
4.0 - 4.5 V
(infinitely variable)
|
Wiring,
N18/2
|
Printable version
