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M35h
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Engine Control System (Diagnostic Codes & Symptom Tests)
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DTC/Circuit Diagnosis
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DTC U1003: Can Comm Circuit
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DTC Logic
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DTC Detection Logic
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DTC Detection Logic
DTC No.
Trouble diagnosis name (Trouble diagnosis content)
DTC detecting condition
Possible cause
U1003
CAN COMM CIRCUIT (CAN communication line)
When ECM is not transmitting or receiving CAN communication signal.
Harness or connectors (CAN communication line is open or shorted)