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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| • |
Finally check the control module outputs. Remember that the test readings do not indicate whether the actuator is working.
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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 connections |
|
Pin
|
Pin BOB
|
Lead colour
|
Component/Function
|
In/Out
|
Test conditions
|
|
Across
|
Test reading
|
See
|
|
1
|
1
|
RD
|
Battery Voltage (+30 circuit)
|
In
|
Ignition ON
|
|
1-B+
|
< 0.5 V
|
|
|
2
|
2
|
RD/BU
|
Battery Voltage (+15 circuit)
|
In
|
Ignition ON
|
|
2-B+
|
< 0.5 V
|
|
|
3
|
3
|
VT
|
Wheel speed, Rear left
|
In
|
Ignition ON
|
Rotate wheel slowly
|
3-18
|
0 V B+
(LP HI LOp) |
|
|
Rotate wheel 1/2 revolution per second
|
3-18
|
15 Hz 50%
(LP HI LOp) |
|
||||||
|
4
|
4
|
YE/WH
|
Sensor, fuel level
|
In
|
Ignition ON
|
|
10-4
|
0.5-3.7 V
|
|
|
5
|
5
|
|
No connection
|
|
|
|
|
|
|
|
6
|
6
|
GN/WH
|
Warning lamp, charging
|
In
|
Ignition ON
|
On
|
6-B-
|
0 V
|
|
|
Off
|
6-B-
|
B+
|
|
||||||
|
7
|
7
|
OG
|
ABS warning lamp
|
In
|
Ignition ON
|
On
|
7-B-
|
0 V
|
|
|
Off
|
7-B-
|
B+
|
|
||||||
|
8
|
8
|
GN
|
I Bus (+)
|
In/Out
|
Ignition ON
|
|
8-18
|
2.5 V
|
|
|
9
|
9
|
WH
|
P-bus (-)
|
In/Out
|
Ignition ON
|
|
9-18
|
2.5 V
|
|
|
10
|
10
|
GY/WH
|
Ground, Sensor ground, fuel level sensor
|
Out
|
Ignition ON
|
|
4-B-
|
< 0.1 V
|
|
|
11
|
11
|
WH
|
Main beam indicator lamp
|
In
|
Ignition ON
|
On
|
11-B-
|
B+
|
|
|
Off
|
11-B-
|
0 V
|
|
||||||
|
12
|
12
|
RD/GN
|
Lights-on indicator lamp
|
In
|
Ignition ON
|
On
|
12-B-
|
B+
|
|
|
Off
|
12-B-
|
0 V
|
|
||||||
|
13
|
13
|
BU
|
Warning lamp, brake fluid level
|
In
|
Ignition ON
|
On
|
13-B-
|
0 V
|
|
|
Off
|
13-B-
|
B+
|
|
||||||
|
14
|
14
|
GN
|
Warning lamp, handbrake
|
In
|
Ignition ON
|
On
|
14-B-
|
0 V
|
|
|
Off
|
14-B-
|
B+
|
|
||||||
|
15
|
15
|
BU
|
Engine oil pressure warning lamp
|
In
|
Ignition ON
|
On
|
15-B-
|
0 V
|
|
|
Off
|
15-B-
|
B+
|
|
||||||
|
16
|
16
|
WH
|
I Bus (-)
|
In/Out
|
Ignition ON
|
|
16-18
|
2.5 V
|
|
|
17
|
17
|
GN
|
P-bus (+)
|
In/Out
|
Ignition ON
|
|
17-18
|
2.5 V
|
|
|
18
|
18
|
BK
|
Ground
|
In
|
Ignition ON
|
|
18-B-
|
<0.5 V
|
|
|
19
|
19
|
|
No connection
|
|
|
|
|
|
|
|
20
|
20
|
|
No connection
|
|
|
|
|
|
|
|
21
|
21
|
|
No connection
|
|
|
|
|
|
|
|
22
|
22
|
GN
|
Xenon lamp system indicator
|
In
|
Ignition ON
|
On
|
22-B-
|
0 V
|
|
|
Off
|
22-B-
|
B+
|
|
> = greater than; < = less than; ~ = alternating current (LP: LOGIC PROBE P = select pulse; p = visible pulse)
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