Sensor Power Supply2 Circuit: Description

WARNING: This page is about a different car, the 2012 Infiniti M35h. However, it is still accessible from the selected car via links, so may be relevant.

ECM supplies a voltage of 5 V to some of the sensors systematically divided into 2 groups, respectively. Accordingly, when a short circuit develops in a sensor power source, a malfunction may occur simultaneously in the sensors belonging to the same group as the short-circuited sensor.

Sensor power supply 1

CMP sensor (PHASE) (bank 1)
Exhaust valve timing control position sensor (bank 1)
Manifold absolute pressure (MAP) sensor
Engine oil pressure sensor

NOTE: If sensor power supply 1 circuit is malfunctioning, DTC P0643 is displayed.

Sensor power supply 2

CKP sensor (POS)
Mass air flow sensor (bank 1) (bank 2)
Battery current sensor
CMP sensor (PHASE) (bank 2)
Exhaust valve timing control position sensor (bank 2)
Refrigerant pressure sensor