Test readings, control module connections, SID
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Test readings, control module connections, SID
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Values and instructions for measuring SID unit voltage levels are found under each section heading.
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Note the test conditions and use common sense when assessing test results.
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The test readings presented are with the ignition in position ON unless otherwise specified.
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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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Test readings % (+) and ms (+) 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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>= greater than; <= less than; ~= alternating current
A pin with no additional comments has no pin connection (LP: LOGIC PROBE P= select pulse; p= visible pulses)
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Pin No.
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Cable colour
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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 reading
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See
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20
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BU/RD
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Parking heater / Auxiliary heater
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Out
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Activated
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20-1
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0 V
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Not activated
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20-1
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B+
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