Operation CHARM
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Mercury
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1992
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Topaz L4-140 2.3L HSC
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Testing and Inspection
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Pinpoint Tests
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B - IDM Missing Code 18C or 212C
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B4 - Check For Open IDM In Harness
B4 - Check For Open IDM In Harness
Pinpoint Test B4:
