FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM
:
Car repair manuals for everyone.
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Chevy Truck
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1987
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Suburban 1/2 Ton 4WD V8-305 5.0L
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Testing and Inspection
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Scan Tool Testing and Procedures
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Positions
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Ignition/Crank - Ignition Switch Status
Ignition/Crank - Ignition Switch Status
The crank mode (on) position engages the starter. The SCAN displays the on/off status of the
ignition switch
as it is transmitted to the ECM.