TECHNICAL BULLETIN
JTB00268NAS2
04-DEC-12
ISSUE ‘2’ CHANGES ARE HIGHLIGHTED IN GRAY
SECTION: 303-00

Engine Hard to Start After Hot-Soak
AFFECTED VEHICLE RANGE:
XF (X250) 4.2L Naturally aspirated only
XJ (X350) 4.2L Naturally aspirated only
XK (X150) 4.2L Naturally aspirated only

VIN:
Model Year:
VIN:
Model Year:
VIN:
Model Year

R00001 – R47153
2009 – 2010
G49701 – H30057
2006 – 2009
B00001-B32752
2007-2009

CONDITION SUMMARY:
Situation: On vehicles fitted with the 4.2L naturally aspirated engine only, the engine may experience a rough
start or stall following a hot soak of 15-20 minutes.
Cause: This may be caused by the fueling calibration not being robust for a winter blend 10% ethanol fuel.
Action: In the event of a customer concern of the above, refer to the Repair Procedure outlined below to
update the Engine Control Module (ECM) software.

PARTS:
No parts necessary

TOOLS:
IDS with latest IDS-DVD and Calibration File; first available on DVD131.01 v.114
Jaguar-approved Midtronics Vehicle Power Supply
Refer to Workshop Manual for any required special tools

WARRANTY:
NOTE: Repair procedures are under constant review, and therefore times are subject to change;
those quoted here must be taken as guidance only. Always refer to DDW to obtain the latest repair
time.
DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a
quantity of zero.
SRO

DESCRIPTION

TIME
(HOURS)

CONDITION
CODE

CAUSAL
PART

Update ECM software – XF

86.99.13

0.20

42

C2Z3051

Update ECM software – XJ, XK

86.99.13

0.30

42

C2Z3051

Normal Warranty policies and procedures apply

NOTE: The information in Technical Bulletins is intended for use by trained, professional Technicians with the knowledge, tools, and
equipment required 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'. If you are not
a Retailer, do not assume that a condition described affects your vehicle. Contact an authorized Jaguar service facility to determine whether
this bulletin applies to a specific vehicle.
© Jaguar Land Rover North America, LLC

555 MacArthur Boulevard

Mahwah, NJ 07430

REPAIR PROCEDURE
UPDATE THE ENGINE CONTROL MODULE SOFTWARE
CAUTION: Ensure all ignition 'ON' / ignition 'OFF' requests are carried out; failure to perform these
steps may cause damage to control modules in the vehicle.
CAUTION: A Jaguar-approved Midtronics Vehicle Power Supply must be connected to the vehicle
battery during IDS diagnosis / module programming.
1. Connect the Jaguar-approved Midtronics Vehicle Power Supply to the vehicle battery.
2. Turn ignition 'ON' (engine not running).
3.
4.
5.
6.

NOTE: IDS must be loaded with DVD131.01 v.114 or later.
Connect the IDS to the vehicle and begin a new Symptom Driven Diagnostics (SDD) session.
Follow the on-screen prompts, allowing SDD to read the VIN and identify the vehicle.
From the Session Type selection screen, choose 'Diagnosis'.
Select the 'Selected Symptoms' tab, and then select one of the following:
•

Powertrain > Engine system > Engine performance > Engine cuts out – when hot or

• Powertrain > Engine system > Engine performance > Engine judders and shakes – when hot
7. Select 'continue'.
8. Select the 'Recommendations' tab.
9. From the Recommendations tab, select 'Run' to ‘Configure existing module – Powertrain control module'
10. Follow all on-screen instructions to complete this task.
11. Exit the current session.
12. Disconnect the IDS and the Midtronics Vehicle Power Supply from the vehicle.