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Jeep
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1999
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Grand Cherokee 2WD L6-4.0L VIN S
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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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Engine Control Module
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Testing and Inspection
Engine Control Module: Testing and Inspection
SYMPTOM
*CHECKING THE PCM POWER AND GROUNDS
POSSIBLE CAUSES
-
Fused ignition switch output circuit open
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PCM ground circuit(s) open
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Fused B(+) circuit less than
10.0 Volts