PRE-RELEASE
Test readings, control module connections
| Test readings, control module connections |
| Scope |
Nominal values and instructions for measuring voltages on the control module can be found under the respective headings below.
| Remember: |
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Note the test conditions and use common sense when assessing the test result.
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The nominal test readings shown apply with the ignition switched 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 outputs. Remember that the test readings do not tell us whether or not the module is functioning properly.
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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 readings % (+) and ms (+) show the pulse ratio and pulse duration of the signal. The test instrument used must be able to measure pulse ratio and pulse width. The (+) sign denotes a positive trigger pulse, TRIG+.
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| Connections, head unit |
> = greater than; < = less than; ~ = AC voltage (LP: LOGIC PROBE P = select pulse; p = visible pulses)
K14
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Pin No.
|
Component/
Function |
In/Out
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Test conditions
|
Across
|
Test value
|
See
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1
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Power supply +30:
|
In
|
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1-8
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B+
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2
|
Line output, front left (+)
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Out
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Music playing
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2-8
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Radio system 1:
Normal sound level, ∼0-2 VAC. Max. volume, ∼0-10 VAC.
Radio system 2 and 3: Max. volume ∼2-3 VAC. The test reading should vary with the volume of the music. |
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3
|
Line output, front right (+)
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Out
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Music playing
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3-10
|
Radio system 1:
Normal sound level, ∼0-2 VAC. Max. volume, ∼0-10 VAC.
Radio system 2 and 3: Max. volume ∼2-3 VAC. The test reading should vary with the volume of the music. |
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4
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Phone line input, signal
|
In
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Call active
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4-5
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∼0-300 mVAC
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Telephone system
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5
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Phone line input, ground
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In
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Call active
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4-5
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∼0-300 mVAC
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Telephone system
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6
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Trigger voltage, amplifier
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Out
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Radio switched on
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6-8
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B+
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7
|
No connection
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8
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Ground:
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In
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1-8
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B+
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9
|
Line output, front left (-)
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Out
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Music playing
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3-9
|
Radio system 1:
Normal sound level, ∼0-2 VAC. Max. volume, ∼0-10 VAC.
Radio system 2 and 3: Max. volume ∼2-3 VAC. The test reading should vary with the volume of the music. |
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10
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Line output, front right (-)
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Out
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Music playing
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3-10
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Radio system 1:
Normal sound level, ∼0-2 VAC. Max. volume, ∼0-10 VAC.
Radio system 2 and 3: Max. volume ∼2-3 VAC. The test reading should vary with the volume of the music. |
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11
|
No connection
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12
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Trigger voltage antenna
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Out
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Main unit on
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12-8
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B+
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13
|
I-bus (1-lead)
|
In/Out
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Ignition ON
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13-8
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2-3 V
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14
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No connection
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K16
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Pin No.
|
Component/
Function |
In/Out
|
Test conditions
|
Across
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Test value
|
See
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1
|
Line input satellite radio receiver Right (+)
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In
|
Music playing
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1-9
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0-2 V AC. The test reading should vary with the volume of the music.
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2
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Line input satellite radio receiver Right (+)
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In
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Music playing
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2-10
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0-2 V AC. The test reading should vary with the volume of the music.
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3
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No connection
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4
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Telephone mute
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In
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No telephone call
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4-8 in K14
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5 V
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Telephone system
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Telephone call
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4-8 in K14
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<2 V
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5
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Line output, rear left (+)
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Out
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Music playing
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5-13
|
Radio system 1:
Normal sound level, ∼0-2 VAC. Max. volume, ∼0-10 VAC.
Radio system 2 and 3: Max. volume ∼2-3 VAC. The test reading should vary with the volume of the music. |
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6
|
Line output, rear right (+)
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Out
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Music playing
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6-14
|
Radio system 1:
Normal sound level, ∼0-2 VAC. Max. volume, ∼0-10 VAC.
Radio system 2 and 3: Max. volume ∼2-3 VAC. The test reading should vary with the volume of the music. |
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7
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No connection
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8
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Mute control, amplifier
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Out
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The ignition is switched on
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8-8 in K14
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<1 V after approx. 1 sec. B+ for approx. 10 sec.
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The ignition is switched off
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8-8 in K14
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9
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Line input satellite radio receiver Left (-)
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In
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Music playing
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1-9
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0-2 V AC. The test reading should vary with the volume of the music.
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10
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Line input satellite radio receiver Right (-)
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In
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Music playing
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2-10
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0-2 V AC. The test reading should vary with the volume of the music.
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11
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No connection
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12
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No connection
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13
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Line output, rear left (-)
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Out
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Music playing
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8-13
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0-2 V AC. Dependent on volume control. The test reading should vary with the volume of the music.
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14
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Line output, rear right (-)
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Out
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Music playing
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6-14
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0-2 V AC. Dependent on volume control. The test reading should vary with the volume of the music.
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15
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No connection
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16
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No connection
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