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Nissan-Datsun
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2014
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Versa Note S, Standard Trans
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Repair and Diagnosis (Single Page)
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Engine Performance
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System
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Engine Control System (Diagnostic Codes & Symptom Tests)
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DTC/Circuit Diagnosis
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DTC U1040: Eng 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 content
DTC detecting condition
Possible cause
U1040
Engine communication line
When ECM unable to transmit engine communication signal
Harness and connectors (Engine communication line is open or shorted.)
ECM