Description & Operation

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

Power is supplied at all times:

Through 40-Amp fusible link (letter "M", located in fuse and fusible link and relay box).
To ignition switch terminal "B".

With ignition switch in START position, power is supplied:

From ignition switch terminal "ST".
To Intelligent Power Distribution Module (IPDM) Engine Room (E/R) terminal No. 21.

With ignition switch in ON or START position, power is supplied to IPDM E/R CPU. With selector lever in "P" or "N" position, power is supplied:

Through automatic transmission assembly terminal No. 9.
To IPDM E/R terminal No. 48.

Ground is supplied at all times:

To IPDM E/R terminals No. 38 and 59.
From body grounds E9, E15 and E24.

CAUTION: Then the starter relay is turned on.

The IPDM E/R is energized and power is supplied:

From terminal No. 19 of the IPDM E/R.
To terminal No. 1 of starter motor windings.

Starter motor plunger closes and provides a closed circuit between the battery and starter motor. Starter motor is grounded to engine block. With power and ground supplied, cranking occurs and engine starts.