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Mitsubishi
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2003
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Galant GTZ
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Self-Diagnostics - 3.0L
›
Scan Tool Communications
›
No Communication With Engine Control Module/Powertrain Control Module
›
Troubleshooting Hints
Troubleshooting Hints
The most likely causes are:
No power supply to PCM.
Defective ground circuit of PCM.
Improper communication line between PCM and scan tool.
Open circuit between PCM and DLC.
Defective PCM.