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Infiniti
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2012
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EX35 Base, AWD
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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 - DTCS P0443 Through P1212
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DTC P0603: ECM Power Supply
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DTC Logic
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DTC Detection Logic
July 1:
So it begins
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DTC Detection Logic
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0603
ECM power supply circuit
ECM back-up RAM system does not function properly.
Harness or connectors [ECM power supply (back-up) circuit is open or shorted.]
ECM