System Description

WARNING: This page is about a different car, the 2007 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Power is supplied at all times:

to starter motor terminal B, and
through 40A fusible link (letter k , located in the fuse and fusible link box)
to ignition switch terminal B.
With the ignition switch in the START position, power is supplied:
from ignition switch terminal ST
to IPDM E/R terminal 4.
With the ignition switch in the ON or START position, power is supplied:
through 10A fuse [No. 12, located in the fuse block (J/B)]
to park/neutral position (PNP) switch terminal 1.
With the selector lever in the P or N position, power is supplied:
through PNP switch terminal 5
to IPDM E/R terminal 53.
Ground is supplied at all times:
to IPDM E/R terminals 38, 50 and 60
through body grounds E9, E15 and E24.
Provided that the IPDM E/R receives a starter relay request ON signal from the BCM over the CAN lines, the IPDM E/R grounds the starter relay and power is supplied:
from terminal 3 of the IPDM E/R
to terminal S of the starter motor windings.
The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The starter motor is grounded to the cylinder block. With power and ground supplied, the starter motor operates.