 |
 |
Test scope |
Test connection |
Test condition |
Nominal value |
Possible cause/Remedy |
| 1.0 |
|
AAC pushbutton control module (N22)
Voltage supply
Circuit 30
|
19 
|
N22
 |
 8
|
on right connector
|
11 - 14 V
|
Wiring,
1.1 ,
Circuit 31 |
| 1.1 |
|
Circuit 30
|
|
N22
|
8
|
on right connector
|
11 - 14 V
|
Wiring,
Circuit 31 |
| 2.0 |
|
Voltage supply
Circuit 15
|
19
|
N22
|
9
|
on right connector
Ignition: ON
|
11 - 14 V
|
Wiring.
|
| 3.0 |
|
Voltage supply
Circuit 15x
|
|
N22
|
11
|
on left connector
Ignition: ON
|
11 - 14 V
|
Wiring.
|
| 4.0 |
   
  |
In-car temperature
sensor (B10/4)
Resistance
|
|
N22
 |
20
|
Ignition: OFF
on left connector
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
|
|
N22
|
22
|
Ignition: OFF
on left connector
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
|
|
N22
|
13
|
Ignition: OFF
on left connector
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
|
|
N22
|
23
|
Ignition: OFF
on left connector
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 |
|
Heater core temperature sensor (B10/1), right
Resistance
|
|
N22
|
14
|
Ignition: OFF
on left connector
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
|
| 9.0 |
|
Refrigerant pressure
sensor (B12)
Voltage supply
|
|
N22
|
7
|
on left connector.
Ignition: ON
|
4.75 - 5.25 V
|
Wiring,
B12,
N22
|
| 10.0 |
|
Sun sensor (B32)
Voltage supply |
|
N22
|
6
|
on left connector.
Ignition: ON
|
0 - 4.5 V
|
Wiring,
N22
|
| 11.0 |
|
Diagnostic output
Voltage |
|
N22
|
1
|
on left connector.
Ignition: ON
|
11 - 14 V
|
Wiring,
N22
|
| 12.0 |
|
Emissions
sensor (B31)
Voltage |
|
N22
|
24
|
on left connector.
Ignition: ON
|
4 - 6 V
|
Wiring,
N22
|
| 13.0 |
|
Auxliary fan (M4)
Voltage |
|
N22
|
16
|
on right connector
Ignition: ON
Press both  > 10 secs.
Ignition: OFF (when done)
|
> 2.0 V
M4 runs. |
Wiring,
N22,
N65 |
| 14.0 |
|
A/C Pushbutton control module (N22),
12 V Output
Voltage |
19
|
N22
|
28
|
Ignition: ON
on right connector.
|
11 - 14 V
|
Wiring,
N22
|
| 15.0 |
 |
Coolant circulation
pump (M13)
Resistance |
20
|
M13
|
28
|
on right connector
Ignition: OFF
Disconnect N22 from .
|
2 - 4
|
Wiring,
M13
|
| 16.0 |
|
Duovalve (Y21)
Resistance (right/left) |
21
|
N22
|
12
|
Ignition: OFF
Disconnect N22 from .
|
30 - 45
|
Wiring,
Y21
|
| 17.0 |
|
Blower
regulator (A32n1)
Activation |
19 |
N22
|
1 |
on right connector
Ignition: ON
|
|
Wiring,
A32 |
| |
|
Voltage |
|
|
|
 MAX |
> 0.7 V |
|
| |
|
|
|
|
|
MIN |
> 0.5 V |
|
| 18.0 |
|
Switchover valve block (Y11),
Voltage |
6
|
N22
|
28
|
on right connector
Ignition: ON
|
< 1 V
|
Wiring.
|
| 19.0 |
|
A/C compressor (A9) Activation
Voltage |
19
|
N22
|
25
|
on right connector
Engine: At Idle
A/C compressor: 
A/C compressor: 
|
< 1 V
11 - 14 V
|
Wiring,
N22
|
| 20.0 |
|
Activated charcoal filter actuator (A32m2)
Resistance |
13
|
N22
|
22
|
Ignition: OFF
Disconnect N22
|
50 - 80
|
Wiring,
A32m2,
N22
|
| 21.0 |
|
Serial interface (instrument cluster) (K1)
Voltage |
|
N22
|
10
|
on right connector.
Ignition: ON |
6 - 8 V
|
Wiring.
|
| 22.0 |
|
Voltage |
19
|
N22
|
3
|
on right connector
Ignition: ON
|
11 - 14 V
|
Wiring. |
| 23.0 |
|
Serial interface (instrument cluster) (K2)
Voltage |
|
N22
|
18
|
on left connector
Ignition: ON
|
6 - 8 V
|
Wiring.
|
Printable version
