DTC P0603 ECM Power Supply: Wiring Diagram
WARNING: This page is about a different car, the 2007 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
For PG-POWER, refer to POWER SUPPLY, GROUND & CIRCUIT ELEMENTS .
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
ECM TERMINALS VOLTAGE SPECIFICATION
| TERMINAL NO. | WIRE COLOR | ITEM | CONDITION | DATA (DC Voltage) |
|---|---|---|---|---|
| 121 | W/L | Power supply for ECM (Back-up) | [Ignition switch: OFF] | BATTERY VOLTAGE (11 - 14V) |