DTC Detection Logic
WARNING: This page is about a different car, the 2011 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION LOGIC
| DTC No. | Trouble diagnosis name (Trouble diagnosis content) | DTC detecting condition | Possible cause |
|---|---|---|---|
| P0603 | ECM BACK UP/CIRCUIT (ECM power supply circuit) | ECM back up RAM system does not function properly. |
|