Readings, control module connections, xenon headlamps
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Readings, control module connections, xenon headlamps
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This section contains the readings and instructions for measuring voltage levels on the SID unit.
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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 test values do not say anything about whether or not the actuator is in working order.
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If a reading is incorrect, 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 readings show the signal's pulse ratio and pulse width. A test instrument with pulse ratio and pulse width measurement must be used. The sign indicates a positive trigger pulse, TRIG+.
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Control module connection
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Headlamp, LH (663FL)
Headlamp, RH (663FR)
Pin no.
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Component/
function
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In/Out
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Test conditions
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Across
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Test value
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See
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1
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Ground
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In
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Turn Ignition On
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10-1
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B+
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1-B-
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<0.5V
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2
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Main beam
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In
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Main beam on
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2-1
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B+
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Main beam off
Dipped beam on
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2-1
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<0.5V
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3
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Main voltage supply
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In
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Xenon lamp on
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3-1
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B+
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4
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Parking lights
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In
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Parking light on
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4-1
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B+
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5
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Indicator lamp, xenon light system
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Out
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Turn Ignition On
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On
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5-1
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<0.5V
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Off
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5-1
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approx. 9 V
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6
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Load angle sensor, PWM signal 200Hz
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In
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approx. 4 V, 200 Hz
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7
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Headlamp flasher H7
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In
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Headlamp flasher on
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7-1
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B+
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IGNITION OFF
Dipped beam off
Headlamp flasher on
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7-1
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B+
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8
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No connection
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9
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Diagnostic communication, Diagnostic tool
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In/Out
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Diagnostic tool not connected
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9-1
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0V
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Diagnostic tool not connected and AHL (xenon) selected for communication
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9-1
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approx. 7-10V
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10
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Power supply +15
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In
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Turn Ignition On
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10-1
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B+
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