Caterpillar C7 On-highway Engine Electrical System Schematic
Document Number: RENR7691-04
Publication Date: May 2011
Introduction
This document provides an interactive schematic for the Caterpillar C7 On-highway Engine Electrical System. It is designed to be viewed at a screen resolution of 1024 x 768 for optimal clarity.
Key Features:
- Bookmarks Panel: Allows quick navigation to specific sections of the schematic and machine views.
- Hyperlinks: Text that is blue and underlined indicates a hyperlink, enabling navigation within the document.
- Callouts: Clicking on callouts can reveal or hide component information. The 'View All Callouts' button makes all callouts visible on machine views.
- Hotkeys: Provides a list of keyboard shortcuts for common functions like Zoom In/Out, Fit to Page, Find, and Search.
Schematic Overview
The schematic illustrates the electrical system of the C7 On-highway Engine. It includes detailed wiring diagrams for the engine harness and typical vehicle harness.
Diagrams and Components:
- Engine Harness Wiring Diagram: Details the connections and components within the engine's electrical harness.
- Typical Vehicle Harness Wiring Diagram: Outlines the electrical connections within the vehicle's harness that interface with the engine.
- Component Locations: Visual representations (left side view) show the physical location of various sensors, connectors, and modules on the engine.
Key Components and Connectors:
- Engine Control Module (ECM)
- Injectors (Cylinders 1-6)
- Sensors: Engine Speed/Timing, Coolant Temperature, Intake Manifold Air Temperature, Boost Pressure, Atmospheric Pressure, Fuel Pressure, Oil Pressure, Oil Level, Wastegate Solenoid.
- Connectors: Labeled E-C1 through E-C18, facilitating identification of harness connections.
Schematic Symbols and Definitions
This section provides a comprehensive guide to the symbols used in the schematics, covering:
- Hydraulic Symbols: Valves, cylinders, pumps, motors, accumulators, fluid storage, lines, and measurement symbols.
- Electrical Symbols: Basic electrical components such as fuses, switches, relays, solenoids, and wiring symbols.
- Harness and Wire Symbols: Identification codes, connector types (Deutsch, Sure-Seal), wire gauge, color codes, and part numbers.
Diagnostic Code Listing
A detailed list of diagnostic trouble codes (DTCs) is provided, correlating PID-FMI codes with their descriptions and flash codes. This section also references related Electrical Service Manuals:
- Troubleshooting: SENR9517
- Systems Operation / Testing and Adjusting: RENR7572
Connector and Splice Locations
Detailed tables and diagrams illustrate the connector and splice locations for various engine harnesses, including:
- Cylinder Injector Harness (222-5917-05)
- Engine Harnesses (222-5905, 222-5907, 261-3781, 261-3782, 261-3783)
- Each table lists wire names, positions, terminal/plug information, and accessory table details for specific connectors.
