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
Connector Pin Identity Chart for AC003
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Jaguar XKR, 2006 Jaguar XK8, 2005 Jaguar XKR, 2005 Jaguar XK8, and 2004 Jaguar XKR. However, it is still accessible from the selected car via links, so may be relevant.
| Pin Number | Circuit | Circuit Function |
|---|---|---|
| 001 | Screen request to ECM | |
| 002 | CLOCK signal to control panel | |
| 003 | DATA OUT signal to control panel | |
| 004 | Compressor lock signal | |
| 005 | Exterior air temperature sensor | |
| 006 | Heater matrix temperature sensor | |
| 007 | DATA IN signal from control panel | |
| 008 | START signal to control panel | |
| 009 | Not used | |
| 010 | Compressor lock select | |
| 011 | In-car temperature sensor | |
| 012 | Evaporator temperature sensor |
Factory Service Tools
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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.