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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Computers and Control Systems
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Testing and Inspection
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Pinpoint Tests
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X - Integrated Relay Control Module
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X27 - Check ECT Sensor
X27 - Check ECT Sensor
Pinpoint Test X27:
