Date of issue 08/04 Amended 11/04 Bulletin Number 303-S514 Page 1 of 12
Operation Of Throttle
While In Closed Position –
Service Action S514
1997-98 MY XK8 Range
1998 MY V8 XJ NA
1998-99 MY V8 XJ S/C
Refer to text
V8 XJ Series/XK
NOTE: THE INFORMATION IN TECHNICAL BULLETINS IS INTENDED FOR USE BY TRAINED, PROFESSIONAL TECHNI-
CIANS WITH THE KNOWLEDGE, TOOLS, AND EQUIPMENT TO DO THE JOB PROPERLY AND SAFELY. IT INFORMS
THESE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR PROVIDES INFORMATION THAT
COULD ASSIST IN PROPER VEHICLE SERVICE. THE PROCEDURES SHOULD NOT BE PERFORMED BY “DO-IT-
YOURSELFERS.” DO NOT ASSUME THAT A CONDITION DESCRIBED AFFECTS YOUR CAR. CONTACT A JAGUAR
RETAILER TO DETERMINE WHETHER THE BULLETIN APPLIES TO YOUR VEHICLE.
A concern has been identified with the operation of the throttle on a number of 1997-98
MY XK8, 1998 MY XJ8 and 1998-99 MY XJR and VDP SC vehicles. Under exceptional
circumstances this concern could cause the engine to cut out, although the engine will
continue to be driven by the road wheels through the transmission and drive the
ancillaries, so there will be no loss of power steering, brakes, air conditioning, etc. The
engine should restart without difficulty once the vehicle has come to a complete
Perform this Service Action on all vehicles within the VIN ranges listed below, both in
and out of new vehicle warranty.
To aid in the identification of repairs required by vehicle, the table below provides a
breakdown of the repair required by model year, model, and VIN range. Workshop
Procedures are included in this bulletin.
Model Year Model VIN Range Repair Required
1997 to 1998 XK 001036 to 020734 Reprogram ECM - page 2
1998 V8 XJ (both
NA and SC) 812256 to 819771 Reprogram ECM - page 2
1998 XK 020735 to 031302 Replace throttle body - page 4
1998 V8 XJ NA only 819772 to 853935 Replace throttle body - page 4
1998 to 1999 V8 XJ SC only 819772 to 878717 Replace throttle body - page 4
Caution: For those vehicles that require ECM reprogramming,
use only Worldwide Diagnostic System (WDS) release JTP759/33, or
Remove and destroy Bulletin 303-S514, dated 08/04.
Replace with this Bulletin.
Revisions are marked with a bar and in bold text.
References to the tie strap for plastic adjustment nuts
have been been added on page 10.