2003 Nissan Altima Electrical System Guide

This document provides a detailed technical overview of the electrical system for the 2003 Nissan Altima. It serves as a comprehensive resource for understanding the complex wiring, power distribution, and circuit elements that govern the vehicle's electronic functions.

Key Sections Covered

• Power Supply Routing Circuits: Detailed schematics and diagrams illustrating how electrical power is distributed throughout the vehicle.
• Ground Circuit Distribution: Information on grounding points and their importance for electrical system integrity.
• IPDM E/R (Intelligent Power Distribution Module Engine Room): Explanation of this integrated module's function, control, and status.
• Harness Layouts and Connectors: Visual guides to the vehicle's wiring harnesses, including connector types and terminal arrangements.
• Electrical Units Location: Identification of the placement of various electrical components within the engine compartment and passenger cabin.
• Fuses and Relays: Information on fuse and fusible link identification, function, and replacement.

This manual is an essential reference for automotive technicians and enthusiasts seeking to diagnose, maintain, or repair the electrical systems of the 2003 Nissan Altima.