Test readings, control module connections
| Test readings, control module connections |
The following pages include values and directions for measuring signals and levels on the main instrument unit and its control module.
| Remember: |
| • |
Note the test conditions and use common sense when assessing the test result.
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|
| • |
First check that the control module has a power supply and is grounded.
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| • |
Then check all sensor inputs and signals from other systems.
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| • |
Lastly, check the control module outputs. Remember, the readings do not say anything about whether or not the actuator is in working order.
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| • |
If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which should be checked more thoroughly.
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| • |
The specified test readings refer to those obtained with a calibrated Fluke 88/97.
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| • |
The test values %(+) and ms(+) indicate the pulse ratio and pulse duration of the signal. A test instrument for measuring pulse ratio and pulse duration must be used. The (+) sign indicates a positive trigger pulse, TRIG+.
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| Control module connection |
|
Pin
|
Component/Function
|
In/Out
|
Test conditions
|
|
Across
|
Test reading
|
See
|
|
1
|
Battery voltage +30
|
In
|
|
|
1-3
|
B+
|
|
|
2
|
Parking heater, indication
|
In
|
|
|
2-3
|
|
|
|
Activated
|
<0.5 V
|
||||||
|
Not activated
|
B+
|
||||||
|
3
|
Ground
|
In
|
Ignition ON
|
|
1-3
|
B+
|
|
|
4
|
No connection
|
|
|
|
|
|
|
|
5
|
No connection
|
|
|
|
|
|
|
|
6
|
No connection
|
|
|
|
|
|
|
|
7
|
No connection
|
|
|
|
|
|
|
|
8
|
No connection
|
|
|
|
|
|
|
|
9
|
No connection
|
|
|
|
|
|
|
|
10
|
No connection
|
|
|
|
|
|
|
|
11
|
No connection
|
|
|
|
|
|
|
|
12
|
No connection
|
|
|
|
|
|
|
|
13
|
No connection
|
|
|
|
|
|
|
|
14
|
No connection
|
|
|
|
|
|
|
|
15
|
Ground, Sensor ground, fuel level sensor
|
Out
|
Ignition ON
|
|
15-3
|
<0.1 V
|
|
|
16
|
Xenon lamp system indicator
|
In
|
Ignition ON
|
On
|
16-B-
|
0 V
|
|
|
Out
|
16-B-
|
∼9 V
|
|
||||
|
17
|
Battery voltage +15
|
In
|
Ignition ON
|
|
17-3
|
B+
|
|
|
18
|
I-bus (-)
|
In/Out
|
Ignition ON
|
|
18-3
|
2.5 V
|
|
|
19
|
I-bus (+)
|
In/Out
|
Ignition ON
|
|
19-3
|
2.5 V
|
|
|
20
|
P bus (-)
|
In/Out
|
Ignition ON
|
|
20-3
|
2.5 V
|
|
|
21
|
P bus (+)
|
In/Out
|
Ignition ON
|
|
21-3
|
2.5 V
|
|
|
22
|
No connection
|
|
|
|
|
|
|
|
23
|
Lights-on indicator lamp
|
In
|
Ignition ON
|
On
|
23-B-
|
B+
|
|
|
Out
|
23-B-
|
0 V
|
|
||||
|
24
|
Main beam indicator lamp
|
In
|
Ignition ON
|
On
|
24-B-
|
B+
|
|
|
Out
|
24-B-
|
0 V
|
|
||||
|
25
|
Engine oil pressure warning lamp
|
In
|
Ignition ON
|
On
|
25-B-
|
0 V
|
|
|
Out
|
25-B-
|
B+
|
|
||||
|
26
|
No connection
|
|
|
|
|
|
|
|
27
|
Warning lamp, brake fluid level
|
In
|
Ignition ON
|
On
|
27-B-
|
0 V
|
|
|
Out
|
27-B-
|
B+
|
|
||||
|
28
|
Warning lamp, handbrake
|
In
|
Ignition ON
|
On
|
28-B-
|
0 V
|
|
|
Out
|
28-B-
|
B+
|
|
||||
|
29
|
No connection
|
|
|
|
|
|
|
|
30
|
Warning lamp, charging
|
In
|
Ignition ON
|
On
|
30-B-
|
0 V
|
|
|
Out
|
30-B-
|
B+
|
|
||||
|
31
|
Sensor, fuel level
|
In
|
Ignition ON
|
|
31-3
|
0.5-3.7 V
|
|
|
32
|
No connection
|
|
|
|
|
|
|
> = greater than; < = less than; ~ = alternating current (LP: LOGIC PROBE P = select pulse; p = visible pulse)
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