Operation CHARM
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Cadillac
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1999
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Eldorado Touring V8-4.6L VIN 9
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Repair and Diagnosis
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Powertrain Management
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Testing and Inspection
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Scan Tool Testing and Procedures
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FC Relay 1 Command
FC Relay 1 Command
Display shows Fan Control Relay state as
On or Off
. When the
PCM
is commanding the Fan 1 Relay On, the scan tool display will switch from Off to On.