 |
|
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.
|
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)
with aspirator
Resistance
|
|
N22
 |
20
|
Ignition: OFF
Soft top completely closed (Model 208.465)
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
Model 208.465:
4.1 |
| 4.1 |
|
Voltage supply from connected A/C pushbutton control module (N22)
to
RB control module (power soft top) (N52)
Model 208.465 only |
|
N22
|
20
|
N22 connected.
Soft top completely closed .
Ignition: ON
|
Approx. 2.7 V |
N22,
N52,
Readout actual values using HHT,
If values are OK:
4.2 |
| 4.2 |
|
Bridge B10/4
with soft top open
Model 208.465 only |
|
N22
|
20
|
N22 connected.
Soft top completely opened .
Ignition: ON
|
Approx. 0.0 V |
N52,
Readout actual values using HHT.
|
| 5.0 |
  |
Evaporator temperature
sensor (B10/6)
Resistance
|
|
N22
|
22
|
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
|
|
N22
|
13
|
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
|
|
N22
|
23
|
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 |
|
Heater core temperature sensor (B10/1), right
Resistance
|
|
N22
|
14
|
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 |
| 9.0 |
|
Refrigerant pressure
sensor (B12)
Voltage supply
|
|
N22
|
7
|
on left connector
(202 589 15 63 00).
Ignition: ON
|
4.75 - 5.25 V
|
Wiring,
B12,
N22
|
| 10.0 |
|
Diagnostic output
Voltage |
|
N22
|
1
|
on left connector
(202 589 15 63 00).
Ignition: ON
|
11 - 14 V
|
Wiring,
N22
|
| 11.0 |
 |
Serial Interface (K1)
Voltage
|
|
N22
|
18 |
on left connector
(202 589 15 63 00).
Ignition: ON |
6 - 8 V
|
Wiring. |
| 12.0 |
  |
Serial Interface (K2)
Voltage |
|
N22
|
10 |
on right connector
(202 589 15 63 00).
Ignition: ON |
> 0.3 V ~
|
Wiring. |
| 13.0 |
|
With Auxiliary fan (M4) only
Activation
Voltage |
|
N22
|
16
|
on right connector
(210 589 00 63 00).
Ignition: ON
Press both  buttons > 10 secs.
End test : Press and  > 10 secs.
|
> 2 V
Auxliary fans (M4) run or
Engine/climate control electric cooling fan runs.
|
Wiring,
N22,
N65/1
|
| 14.0 |
|
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
|
| 15.0 |
|
Coolant circulation
pump (M13)
Resistance |
20
|
N22
|
28
|
on right connector
(210 589 00 63 00).
Ignition: OFF
Disconnect N22 from .
|
3 - 7 |
Wiring,
M13
|
| 16.0 |
|
Duovalve (Y21)
Resistance |
21
|
Y21
|
12
|
Ignition: OFF
Disconnect N22 from
(210 589 00 63 00).
|
30 - 40 |
Wiring,
Y21 |
| 17.0 |
|
Blower regulator (A32n1)
Activation
Voltage |
19
|
N22
|
1
|
on right connector
(210 589 00 63 00).
Ignition: ON
 MIN
MA |
> 0.9 V
> 5.0 V
|
Wiring,
A32
|
| 18.0 |
|
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
|
| 19.0 |
|
Switch over block (Y11),
(15 connections)
Voltage
|
6
|
N22
|
28
|
on right connector
(210 589 00 63 00).
Ignition: ON
|
> 2 V
|
Wiring,
Y11
|
Printable version
