Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Jaguar XJRFACTORY OEM SERVICE PROCEDURE
Section 176 (Module Communications Network)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 Jaguar XKR, 2009 Jaguar XK8, 2008 Jaguar XKR, 2008 Jaguar XK8, and 2007 Jaguar XKR. However, it is still accessible from the selected car via links, so may be relevant.
- Module Communications Network
- Specifications
- Communications Network - Description & Operation
- Introduction
- Controller Area Network (Can) Bus
- Media Orientated System Transport (Most) Ring
- Local Interconnect Network (Lin) Bus
- Control Diagram - Medium Speed Can Bus
- Control Diagram - High Speed Can Bus
- Control Diagram - Most Ring (Up To 2009 My)
- Control Diagram - Most Ring (From 2009 My)
- Control Diagram - Lin Bus And Private Can Bus
- Communications Network - Diagnostic Procedures
- Auxiliary Junction Box - Removal and Installation
- Central Junction Box (CJB) - Removal and Installation
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.