Locate coolant temperature sensor in 2004 jaguar xj8

SOURCE: My 2004 Jaguar xj8 will not release both latches

If your bonnet will not release, there is a rubber plug inside fender located up in
the wheel well under the latch. Remove the plug, stick a screwdriver up and pry the latch
back. The hood / bonnet will open.

SOURCE: locate engine temperature coolant sensor on jetta TDI 2004

This is it.

SOURCE: 2004 xj8 jaguar a/c fan

there is a relay on the firewall for that but check the fuses first to make sure its not blown...if its not blown you can run a jumper wire to test the motor itself to see if it works or not.

SOURCE: 2004 Jaguar x type electric radiator fans not operating

check out with your dealer as you might have a recall to fix this problem.
XT303-S932
X-TYPE
DATE 01/03
MODEL
2002-03 MY
X-TYPE
VIN
C00294-C91719
Overheating - Cooling Fans Inoperative - Replace Module Prior To Retailing - Service Action S932
This Service Action Applies to Vehicles That Have Not Been Retailed
Issue:
The cooling fan module on X-TYPE vehicles may fail under certain circumstances. There are various root causes but the design and quality of the printed circuit board within the cooling fan module are the most significant. The NAND gate used in the circuit is detective causing multiple failure modes, this can result in high engine temperature and overheating due to the cooling fans not operating.
A change has been implemented in production from VIN C91720. On these vehicles a 'Philips' printed circuit board has been used that has a modified voltage spike protection strategy.
Action:
To prevent customers from experiencing this issue, install the latest specification cooling fan module on 2002-03 MY X-TYPE vehicles within the above VIN range that have not been retailed.
PROCEDURE
1. Install new cooling fan module (see Workshop Manual, JTIS CD ROM, section: 303-03, SRO 26.25.38).
Parts Information
Warranty Information:
Warranty claims should be submitted quoting S932 in place of the warranty fault code together with SRO: 26.25.38 and the relevant part number. This will result in a labor time allowance of 0.8 hours to replace the cooling fan module and payment for the part used. Should the vehicle be brought back into the workshop for this action alone to be undertaken, an additional labor time allowance of 0.1 hours can be claimed quoting SRO: 10.10.10 for drive in/drive out.
Warranty claims should be submitted quoting the information found in the table. This will result in payment of the stated time and, where applicable, parts/miscellaneous expense codes.
The options that allow for drive in/drive out may only be claimed when the vehicle has been brought in to the workshop for this action alone to be undertaken.
The SROs and parts items listed above have been included for information only, there will be no requirement to enter the parts or SROs onto the claim.
NOTE: Always perform a DDW claim search first to determine whether this service action has been performed on this vehicle. The warranty selection under the vehicle inquiry will give a listing of all claims against the vehicle. If this service action number appears in the program code field, do not perform this service action.

SOURCE: where is the coolant temperature sensor on a 2004

It is behind the alternator. If you disconnect the top alternator bolt and then the lead to the alternator, and loosen the bottom bolt, you can swing the alternator towards the passenger side and see the sensor. You obviously have to remove the serpentine belt to move the alternator.