System Description

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Power is supplied at all times:

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 2 (with 4-speed A/T) or terminal 1 (with 5-speed A/T).

With the selector lever in the P or N position, power is supplied:

through PNP switch terminal 1 (with 4-speed A/T) or terminal 5 (with 5-speed A/T)
to IPDM E/R terminal 53.

The IPDM E/R is energized 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.