Test readings, control module connections
| Test readings, control module connections |
| Scope |
Values and directions for measuring the voltage levels in the control module are given under the relevant heading.
| Remember |
| • |
Note the test conditions and use common sense when assessing the test result.
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| • |
The specified values are with the ignition ON unless otherwise stated.
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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 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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Test values %(+) and ms(+) indicate the pulse ratio and pulse rate of the signal respectively. A scan tool for measuring pulse ratio and pulse width respectively must be used. The (+) indicates positive trigger pulse, TRIG+.
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| Main unit connections (connectors A, B, C) |
> =greater than ; < = less than ; ~ = alternating current
(LP: LOGIC PROBE P = select pulse ; p = visible pulses
Connector (A)
|
Pin No.
|
Lead colour
|
Component/
function |
In/Out
|
Test conditions
|
Across
|
Test reading
|
See
|
|
1
|
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No connection
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2
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No connection
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3
|
BN/RD
|
Telephone mute
|
In
|
No telephone call.
|
3(A)-8(A)
|
4-6 V
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Telephone call.
|
3(A)-8(A)
|
<2 V
|
|||||
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4
|
BN/RD
|
Power supply +15
|
In
|
Ignition ON
|
4(A)-8(A)
|
B+
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5
|
BK/WH
|
Trigger voltage
(electric antenna) |
Out
|
Main unit on.
|
5(A)-8(A)
|
Audio system
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6
|
GN/WH
|
Rheostat
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7
|
RD
|
Power supply +30
|
In
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7(A)-8(A)
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B+
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8
|
BK
|
Ground
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8(A) - good grounding point
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<0.5V
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Connector (B)
|
Pin No.
|
Lead colour
|
Component/
function |
In/Out
|
Test conditions
|
Across
|
Test reading
|
See
|
|
1
|
BK/GN
|
Loudspeaker Right Rear (+)
|
Out
|
Music playing.
|
1(B)-8(A)
|
0-10V AC. Dependent on volume control. The test reading should vary with the volume of the music
|
Audio system
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2
|
BK/WH
|
Loudspeaker Right Rear (-)
|
Out
|
Music playing.
|
2(B)-8(A)
|
0-10V AC. Dependent on volume control. The test reading should vary with the volume of the music
|
Audio system
|
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3
|
BK/BN
|
Loudspeaker Right Front (+)
|
Out
|
Music playing.
|
3(B)-8(A)
|
0-10V AC. Dependent on volume control. The test reading should vary with the volume of the music
|
Audio system
|
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4
|
BN/RD
|
Loudspeaker Right Front (-)
|
Out
|
Music playing.
|
4(B)-8(A)
|
0-10V AC. Dependent on volume control. The test reading should vary with the volume of the music
|
Audio system
|
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5
|
BN
|
Loudspeaker Left Front (+)
|
Out
|
Music playing
|
5(B)-8(A)
|
0-10V AC. Dependent on volume control. The test reading should vary with the volume of the music
|
Audio system
|
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6
|
BN/GY
|
Loudspeaker Left Front (-)
|
Out
|
Music playing.
|
6(B)-8(A)
|
0-10V AC. Dependent on volume control. The test reading should vary with the volume of the music
|
Audio system
|
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7
|
BN/WH
|
Loudspeaker Left Rear (+)
|
Out
|
Music playing
|
7(B)-8(A)
|
0-10V AC. Dependent on volume control. The test reading should vary with the volume of the music
|
Audio system
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8
|
BN
|
Loudspeaker Left Rear (-)
|
Out
|
Music playing.
|
8(B)-8(A)
|
0-10V AC. Dependent on volume control. The test reading should vary with the volume of the music
|
Audio system
|
Connector (C)
|
Pin No.
|
Lead colour
|
Component/
function |
In/Out
|
Test conditions
|
Across
|
Test reading
|
See
|
|
1
|
BK/BN
|
Phone line input, ground
|
In
|
-
|
-
|
-
|
|
|
2
|
WH
|
I-BUS (-)
|
In/Out
|
Ignition ON
|
2(C)-8(A)
|
2-3 V
|
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3
|
OG
|
Phone line input, signal
|
In
|
-
|
-
|
-
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4
|
GN
|
I-BUS (+)
|
In/Out
|
Ignition ON
|
4(C)-8(A)
|
2-3 V
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5
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No connection
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6
|
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No connection
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7
|
RD
|
Line input CD changer
Left (-) |
In
|
Music playing
|
7(C)-9(C)
|
0-2 VAC. The test reading should vary with the volume of the music.
|
Audio system
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8
|
BN
|
Line input CD changer
Right (-) |
In
|
Music playing
|
8(C)-10(C)
|
0-2 VAC. The test reading should vary with the volume of the music.
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Audio system
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9
|
BU
|
Line input CD changer
Left (+) |
In
|
Music playing
|
9(C)-7(C)
|
0-2 VAC. The test reading should vary with the volume of the music.
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Audio system
|
|
10
|
GN
|
Line input CD changer
Right (+) |
In
|
Music playing
|
10(C)-8(C)
|
0-2 VAC. The test reading should vary with the volume of the music.
|
Audio system
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