Nissan: Circuit Voltage DTC
This bulletin applies to 2015-2020 Nissan 370Z vehicles equipped with multi-port fuel injection. The MIL may be on accompanied by DTC P0603 (ECM back up/circuit). This DTC may have been stored due to low battery voltage, a discharged battery or battery terminal disconnections.
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Confirm that battery voltage is at least 11 volts or more with ignition on. Make sure that battery cables are clean and tight.
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Connect the C-III plus to the vehicle.
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Open C-III plus on the CONSULT PC.
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Turn ignition on but do not start the engine.
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Erase the DTC(s).
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Turn ignition off.
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Turn ignition on and wait for at least 1 second.
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Turn ignition off and wait for at least 10 seconds.
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Repeat steps 7 and 8.
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Turn ignition on. If DTC P0603 is not currently stored as a first trip DTC, the procedure is complete.