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.
2004 Jaguar XJRFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Adaptive Speed Control Module | At left front of engine compartment. See Figure . |
| Air Suspension Module | Behind right rear seat back. See Figure . |
| Blower Controller | Behind right side of dash. |
| Cellular Phone Module | At left side of trunk. See Figure . |
| Climate Control Module | Behind left side of dash. See Figure . |
| Cooling Fan Module & Motor | Behind radiator. |
| Driver Door Module | In left front door. See Figure . |
| Driver Seat Module | Under left front seat. See Figure . |
| Dynamic Stability Control Module | At right front of engine compartment. See Figure . |
| Engine Control Module | At right rear side of engine compartment, in control module enclosure. See Figure . |
| Front Electronic Module | Behind left front kick panel. See Figure . |
| Fuel Pump No. 2 Module | At right rear of trunk. See Figure . |
| Ignition Module & Coil No. 1 | At top of right cylinder head. |
| Ignition Module & Coil No. 2 | At top of left cylinder head. |
| Ignition Module & Coil No. 3 | At top of right cylinder head. |
| Ignition Module & Coil No. 4 | At top of left cylinder head. |
| Ignition Module & Coil No. 5 | At top of right cylinder head. |
| Ignition Module & Coil No. 6 | At top of left cylinder head. |
| Ignition Module & Coil No. 7 | At top of right cylinder head. |
| Ignition Module & Coil No. 8 | At top of left cylinder head. |
| J-Gate Module | At J gate assembly. See Figure . |
| LH Headlamp Leveling Module | Behind left headlamp assembly. See Figure . |
| Navigation Control Module | At left side of trunk. See Figure . |
| Occupancy Sensing Module | Under right front seat. See Figure . |
| Parking Aid Module | At left rear of trunk. See Figure . |
| Parking Brake Module | At right rear of trunk. See Figure . |
| Passenger Seat Weight Sensing Module | Under passenger seat. |
| Rain Sensing Module | Under center of windshield. |
| Rear Blower Controller | At left front of rear climate control unit. |
| Rear Climate Control Module | In rear console. See Figure . |
| Rear Electronic Module | At right rear of trunk. See Figure . |
| Rear Memory Module | At center front of trunk. See Figure . |
| Remote Keyless Entry Module | Behind left side of dash. |
| Restraints Control Module | Under front of center console. See Figure . |
| RH Headlamp Leveling Module | Behind right headlamp assembly. See Figure . |
| Sliding Roof Module | In roof console. See Figure . |
| Steering Column Lock Module | On steering column. See Figure . |
| Steering Wheel Heater Module | In steering wheel. |
| Trailer Towing Module | At right rear of trunk. See Figure . |
| Transmission Control Module | Integral to transmission control valve. |
| Vehicle Information Control Module | At left front of trunk. See Figure . |
| Voice Activation Module | At left side of trunk. See Figure . |
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.