Operation CHARM
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Mercury
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1994
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Cougar/XR7 V8-281 4.6L SOHC
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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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Z - Intermittent
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Z151
Z151
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Key Off.
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Disconnect ICM from tester.
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Measure the resistance from PIP jack to PWR GND jack.
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Measure the resistance from PIP jack to VPWR jack.
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Is each resistance greater than 10K ohms?
Yes --
GO to
Z152.
Z152
No --
GO to
Z158.
Z158