 |
|
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,
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
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
|
29
|
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
|
29
|
N22
|
22
|
Ignition: OFF
on left connector
Disconnect N22 from .
|
oC k
0 7.3 - 10
10 4.2 - 6.0
20 2.8 - 3.9
30 1.7 - 2.6
45 1.0 - 1.5
|
Wiring,
B10/6 |
| 6.0 |
|
Refrigerant temperature sensor (B12/1)
Resistance
|
29 |
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 (B10/2), left
Resistance
|
29
|
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,
B10/2 |
| 8.0 |
|
Heater core temperature sensor (B10/3), right
Resistance
|
29
|
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,
B10/3
|
| 9.0 |
|
ECT sensor (B11/4 or B11/10)
Resistance
(up to MY 1997)
|
29
|
N22
|
24
|
Ignition: OFF
on left connector
Disconnect N22 from .
|
oC k
20 5.0 - 8.0
60 1.0 - 1.5
85 .45 - .65
100 .3 - .4
120 .19 - .22
|
Wiring,
B11/4 or B11/10
|
| 10.0 |
|
Outside temperature
sensor (B10/5)
Resistance
(up to MY 1997)
|
29
|
N22
|
21
|
Ignition: OFF
on left connector
Disconnect N22 from .
|
oC k
10 5.2 - 5.8
20 2.6 - 2.9
30 2.0 - 2.4
45 1.3 - 1.7
|
Wiring,
B11/4 or B11/10
|
| 11.0 |
|
Refrigerant pressure
sensor (B12)
Voltage supply
|
|
N22
|
7
|
on left connector.
Ignition: ON
|
4.75 - 5.25 V
|
Wiring,
B12,
N22
|
| 12.0 |
|
Sun sensor (B32)
Voltage supply |
|
N22
|
15
|
on left connector.
Ignition: ON
|
0 - 4.5 V
|
Wiring,
N22
|
| 13.0 |
|
Diagnostic output
Voltage |
|
N22
|
1
|
on left connector.
Ignition: ON
|
11 - 14 V
|
Wiring,
N22
|
| 14.0 |
 |
Emissions sensor
(B31)
Voltage |
|
N22
|
12
|
on left connector.
Ignition: ON
|
4 - 6 V
|
Wiring,
N22
|
| 15.0 |
 |
Auxliary fan (M4)
Voltage |
|
N22
|
16
|
on right connector
Ignition: ON
Press  > 10 secs.
End : ignition OFF
|
> 2 V
Auxliary fan (M4) on. |
Wiring,
N22,
N65
|
| 16.0 |
|
A/C Pushbutton control module (N22), 12 V output
Voltage |
19
|
N22
|
28
|
Ignition: ON
on right connector.
|
11 - 14 V |
Wiring,
N22
|
| 17.0 |
|
Coolant circulation pump (A31m1)
Resistance |
20
|
N22
|
28
|
on right connector
Ignition: OFF
Disconnect N22 from .
|
2 - 4 |
Wiring,
A31m1
|
| 18.0 |
|
Left/right duovalve
(A31y1, A31y2)
Resistance |
21
|
A31y1
A31y2
|
12
|
Ignition: OFF
on right connector
Disconnect N22 from .
|
8 - 30 |
Wiring,
A32
|
| 19.0 |
|
Blower regulator (A32n1)
Control
Voltage |
19
|
N22
|
1
|
on right connector
Ignition: ON
 MIN
MA |
> 0.7 V
> 0.5 V
|
Wiring,
A31y1, A31y2
|
| 20.0 |
|
Switchover valve block (Y11), (15 connections multiplex)
Voltage
|
19
|
N22
|
28
|
on right connector
Ignition: ON |
< 3 V |
Wiring.
|
| 21.0 |
|
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
|
| 22.0 |
|
Activated charcoal filter actuator (A32m2)
Resistance |
13
|
N22
|
22
|
Ignition: OFF
Disconnect N22
|
50 - 80 |
Wiring,
A32m2,
N22
|
| 23.0 |
|
Voltage |
19
|
N22
|
28
|
on right connector.
Ignition: OFF
Press (illuminates)
|
11 - 14 V |
Wiring.
|
| 24.0 |
|
Warm/cool air
switch (S24/1)
Warm air |
|
N22
|
4
|
on left connector.
Ignition: ON
Press
Press and hold warm air button (red): ON
|
4.75 - 5.25 V
1.5 - 3 V
S24/1: LED " WARM " is illuminated.
|
Wiring,
S24/1
N22
1.1
|
| 24.1 |
|
LED
Warm air |
4
|
N22
|
5
|
Ignition: ON
S24/1: (warm air) OFF
S24/1: (warm air) ON
|
< 1 V
LED is OFF
< 6 V
LED is ON
|
Wiring,
S24/1
N22 |
| 25.0 |
|
Warm/cool air
switch (S24/1)
Cool air |
|
N22
|
3
|
on left connector.
Ignition: ON
Press
Press and hold cool air button (blue): ON
|
4.75 - 5.25 V
1.5 - 3 V
S24/1: LED " COLD " is illuminated
|
Wiring,
S24/1
N22/1
1.1
|
| 25.1 |
|
LED
Cool air |
5
|
N22
|
4
|
Ignition: ON
S24/1: (cold air) OFF
S24/1: (cold air) ON
|
< 1 V LED is OFF
< 6 V LED is ON
|
Wiring,
S24/1
N22
|
| 26.0 |
|
Idle speed stabilization |
19
|
N22
|
10
|
on left connector.
Engine: at Idle
Press
|
< 1 V
10 - 12 V
|
Wiring,
N22
|
| 27.0 |
|
Left front axle vehicle speed signal (VSS) sensor |
|
N22
|
17
|
Raise front vehicle
Ignition: ON
Shift lever: N
Spin left front wheel by hand for > 1 sec.
|
> 3 V ~ |
Wiring,
See D.M., Chassis and Drivetrain,
Vol. 2, section 6.2, >23 |
| 28.0 |
|
Not applicable to U.S version vehicles.
|
|
|
|
|
|
|
| 29.0 |
|
Engine RPM
|
|
N22
|
25 |
Engine: at Idle
on left connector |
Gasoline engine:
5 - 7.5 V
Diesel engine:
5 - 0.5 V
|
Wiring. |
| 30.0 |
|
Serial Interface (K1)
|
|
N22
|
10 |
on left connector
Ignition: ON |
< 10 V
|
Wiring. |
| 31.0 |
|
Serial Interface (K2)
|
|
N22
|
10 |
on right connector
Ignition: ON |
> 3 V ~
|
Wiring. |
|
|
Test scope |
Test connection |
Test condition |
Nominal value |
Possible cause/Remedy |
| 1.0 |
|
Voltage supply, circuit 15
|
20 |
N22/3
|
1 |
Ignition: ON |
11-14 V
|
Wiring,
1.1 |
| 1.1 |
|
Voltage supply, circuit 15
|
|
N22/3
|
1 |
|
11-14 V
|
Wiring. |
| 2.0 |
|
Evaporator temperature
sensor (B10/6)
|
4 |
N22/3
|
18 |
Ignition: OFF
Disconnect N22/3 from . |
oC k
0 7.3- 10.0
10 4.2 - 6.0
20 2.8 - 3.9
30 1.7 - 2.6
45 1.0 - 1.5
|
Wiring,
B10/6,
N22/3 |
| 3.0 |
|
Left rear heater core temperature sensor (B10/9)
Resistance
|
4 |
N22/3
|
14 |
Ignition: OFF
Disconnect N22/3 from . |
oC k
10 19.0 - 21.2
20 11.9 - 13.2
30 7.7 - 8.4
45 4.2 - 4.6
|
Wiring,
B10/9,
N22/3 |
| 4.0 |
|
Right rear heater core temperature
sensor (B10/10)
|
4 |
N22/3
|
16 |
Ignition: OFF
Disconnect N22/3 from . |
oC k
10 19.0 - 21.2
20 11.9 - 13.2
30 7.7 - 8.4
45 4.2 - 4.6
|
Wiring,
B10/10,
N22/3 |
| 5.0 |
|
Potentiometer, rear A/C blower speed selector wheel (N22/3)
|
20 |
N22/3
|
11 |
Ignition: ON
Potentiometer setting:
MIN
(0 not engaged)
MAX |
< 1 V
(infinitely variable)
> 4 V
|
N22/3 |
| 6.0 |
|
Right potentiometer (temperature selector wheel)
N22/3 |
20 |
N22/3
|
15 |
Ignition: ON
Temperature selector wheel in:
Blue area
Red area |
< 1 V
(infinitely variable)
> 4 V
|
Wiring,
N22/3 |
| 7.0 |
|
Left potentiometer (temperature selector wheel)
N22/3 |
20 |
N22/3
|
17 |
Ignition: ON
Temperature selector wheel in:
Blue area
Red area |
< 1 V
(infinitely variable)
> 4 V
|
Wiring,
N22/3 |
| 8.0 |
|
Rear refrigerant shut-off
valve (Y67)
|
9 |
N22/3
|
1 |
Rear A/C: ON
Rear A/C: OFF |
11-14 V
< 1 V
|
Wiring,
N22/3 |
| 9.0 |
|
Coolant circulation
pump (A31/1m1)
|
2/1  |
A31/1m1
|
 2/2 |
Ignition: ON
Connector 2 disconnected
from A31/1m1 |
2 - 4
|
Wiring,
A31/1m1,
N22/3
|
| 10.0 |
|
Right duovalve (A31/1y2)
Voltage
|
5 |
N22/3
|
1 |
Ignition: ON
Both temperature selector wheels at:
Red detent
Blue detent
|
< 1 V
11 - 14 V |
Wiring,
10.1
|
| 10.1 |
|
Resistance
|
5 |
N22/3
|
7 |
Ignition: OFF
Disconnect N22/3 from .
|
20 - 35 |
A31/1y2,
N22/3 |
| 11.0 |
|
Left duovalve (A31/1y1)
Voltage
|
7 |
N22/3
|
1 |
Ignition: ON
Both temperature selector wheels at:
Red detent
Blue detent
|
< 1 V
11 - 14 V |
Wiring,
11.1
|
| 11.1 |
|
Resistance
|
5 |
N22/3
|
7 |
Ignition: OFF
Disconnect N22/3 from .
|
20 - 35 |
A31/1y1,
N22/3 |
| 12.0 |
|
Rear A/C electronic blower regulator (N29/2) |
|
N22/3
|
11 |
Ignition: ON
Blower speed wheel set to:
MIN (not 0)
MAX
|
< 1 V
> 5 V, blower motor running
|
Wiring,
N29/2
Rear blower motor (M2/1) |
| 13.0 |
|
Rear tunnel flap vacuum
valve (Y67/1) |
6 |
N22/3
|
1 |
Rear A/C: OFF
Rear A/C: ON
|
< 1 V
> 9 V |
Wiring,
Y67/1 |
Printable version
