FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM
:
Car repair manuals for everyone.
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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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Z103
Z103
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Measure the resistance from IDM jack to PWR GND jack.
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Is each resistance greater than 10K ohms?
Yes --
REPLACE PCM.
No --
SERVICE IDM short circuit in harness.