 |
|
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 (210 589 00 63 00).
|
11 - 14 V
|
Wiring,
1.1 ,
Circuit 31 |
| 1.1 |
|
Circuit 30
|
|
N22
|
8
|
on right connector (210 589 00 63 00).
|
11 - 14 V
|
Wiring,
Circuit 31 |
| 2.0 |
|
Voltage supply
Circuit 15
|
19
|
N22
|
9
|
on right connector
(210 589 00 63 00).
Ignition: ON
|
11 - 14 V
|
Wiring.
|
| 3.0 |
|
Voltage supply
Circuit 15x
|
19
|
N22
|
7
|
on left connector
(210 589 00 63 00).
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
(210 589 00 63 00).
Disconnect N22 from .
|
oC  k 
10 19.0 - 21.0
20 11.9 - 13.0
30 7.7 - 8.4
45 4.2 - 4.6
|
Wiring,
B10/4
|
| 5.0 |
  |
Evaporator temperature
sensor (B10/6)
Resistance
|
23
|
N22
|
19
|
Ignition: OFF
on left connector
(202 589 15 63 00).
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
|
21
|
Ignition: OFF
on left connector
(202 589 15 63 00).
Disconnect N22 from .
|
° C k
20 < 13
40 < 5.5
50 < 3.7
60 < 2.5
70 < 1.8
|
Wiring,
B12/1 |
| 7.0 |
|
Heater core temperature sensor (B10/1), left
Resistance
|
23
|
N22
|
17
|
Ignition: OFF
on left connector
(202 589 15 63 00).
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,
B10/1 |
| 8.0 |
|
Refrigerant pressure
sensor (B12)
Voltage supply
|
23
|
N22
|
31
|
on left connector
(202 589 15 63 00).
Ignition: ON
|
4.75 - 5.25 V
|
Wiring,
B12,
N22
|
| 9.0 |
|
Diagnostic output
Voltage |
|
N22
|
15
|
on left connector
(202 589 15 63 00).
Ignition: ON
|
11 - 14 V
|
Wiring,
N22
|
| 10.0 |
 |
Serial Interface (K1)
|
23 |
N22
|
24 |
on left connector
(202 589 15 63 00).
Ignition: ON |
6 - 8 V
|
Wiring. |
| 11.0 |
|
Serial Interface (K2)
|
|
N22
|
10 |
on right connector
(202 589 15 63 00).
Ignition: ON |
6 - 8 V
|
Wiring. |
| 12.0 |
|
Auxliary fan (M4)
Activation
Voltage |
19
|
N22
|
16
|
on right connector
(210 589 00 63 00).
Ignition: ON
Press  and  > 10 secs.
End test : Press and > 10 secs.
|
> 2 V
Auxliary fans (M4) run. |
Wiring,
N22,
N65
|
| 13.0 |
|
A/C Pushbutton control module (N22), 12 V output
Voltage |
19
|
N22
|
28
|
Ignition: ON
on right connector
(210 589 00 63 00).
|
11 - 14 V |
Wiring,
N22
|
| 14.0 |
|
Cooalnt circulation
pump (M13)
Resistance |
20
|
N22
|
18
|
on right connector
(210 589 00 63 00).
Ignition: OFF
Disconnect N22 from .
|
2 - 4 |
Wiring,
M13
|
| 15.0 |
|
Duovalve (Y21)
Resistance |
18
|
Y21
|
12
|
Ignition: OFF
Disconnect N22 from
(210 589 00 63 00).
|
8 - 15 |
Wiring,
Y21 |
| 16.0 |
|
Blower regulator (A32n1)
Control
Voltage |
19
|
N22
|
1
|
on right connector
(210 589 00 63 00).
Ignition: ON
 MIN
MA |
> 0.7 V
> 0.5 V
|
Wiring,
A32
|
| 17.0 |
 |
A/C compressor (A9) activation
Voltage
|
19
|
N22
|
25
|
on right connector
(210 589 00 63 00).
Engine: At Idle
A/C compressor: 
A/C compressor: 
|
< 1 V
11 - 14 V
|
Wiring,
N22
|
| 18.0 |
 |
Switch over block (Y11/3),
Defroster outlet
Long stroke
Voltage
|
23
|
N22
|
18
|
on right connector
(210 589 00 63 00).
Ignition: ON
Press 
|
11 - 14 V
|
Wiring,
Y11/3
|
| 19.0 |
|
Switch over block (Y11/3),
Defroster outlet
Short stroke
Voltage
|
22
|
N22
|
18
|
on right connector
(210 589 00 63 00).
Ignition: ON
Press
|
11 - 14 V
|
Wiring,
Y11/3
|
| 20.0 |
|
Switch over block (Y11/3),
Diverter valve
center vent
Voltage
|
15
|
N22
|
18
|
on right connector
(210 589 00 63 00).
Ignition: ON
N22 display: "Lo"
Press 
|
11 - 14 V
|
Wiring,
Y11/3
|
| 21.0 |
|
Switch over block (Y11/3),
Blend air flap
center vent
Voltage
|
6
|
N22
|
18
|
on right connector
(210 589 00 63 00).
Ignition: ON
Press
|
11 - 14 V
|
Wiring,
Y11/3
|
| 22.0 |
|
Switch over block (Y11/3),
Footwell flap
long stroke
Voltage
|
14
|
N22
|
18
|
on right connector
(210 589 00 63 00).
Ignition: ON
Press
|
11 - 14 V
|
Wiring,
Y11/3
|
| 23.0 |
|
Switch over block (Y11/3),
Footwell flap
short stroke
Voltage
|
13
|
N22
|
18
|
on right connector
(210 589 00 63 00).
Ignition: ON
Press
|
11 - 14 V
|
Wiring,
Y11/3
|
| 24.0 |
|
Switch over block (Y11/3),
Fresh/recirculated air flap
80%
Voltage
|
5
|
N22
|
18
|
on right connector
(210 589 00 63 00).
Ignition: ON
is illuminated.
|
11 - 14 V
|
Wiring,
Y11/3
|
| 25.0 |
|
Switch over block (Y11/3),
Fresh/recirculated air flap
20%
Voltage
|
4
|
N22
|
18
|
on right connector
(210 589 00 63 00).
Ignition: ON
is illuminated.
|
11 - 14 V
|
Wiring,
Y11/3
|
Printable version
