-REVISED- VARIOUS INFINITI MODELS; DIAGNOSIS PROCEDURE FOR MIL ON DTC P0603 ECM POWER SUPPLY
If you have a vehicle with the MIL ON that has a DTC P0603 stored in the ECM:
Perform the diagnostic steps in this bulletin FIRST.
This DTC may have been stored due to a series of previous low battery voltage, dead battery or battery terminal disconnections.
DO NOT perform any other diagnostic procedures or repairs for this code until you have performed the ones in this bulletin.
See the Service Procedure in this bulletin for further detail.