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.
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HOMESERVICE MANUALSJAGUAR1991XJ-6 L6-4.0LREPAIR AND DIAGNOSISTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSPDU - SOFTWARE UPDATE
1991 Jaguar XJ-6 L6-4.0L
PDU - Software Update
1991 Jaguar XJ-6 L6-4.0LSECTION PDU - Software Update
1-106
DATE
7/99
All
MODEL
All
VIN
New PDU Software JTP 626/5 and 627/6
ISSUE:
New PDU software has been released.
JTP 626/5 replaces 626/4.
JTP 627/6 replaces 627/5.
JTP 627/6 includes a new application for using the S-TYPE driveshaft balancing equipment.
ACTION:
Ensure that this software is installed immediately. Retain the previous issues in a secure place as a backup CD-ROM in the event the new software is damaged.
Use JTP 626/5 for diagnosing 1990-96 MY XJS and 1990-94 MY Sedan Range. Use JTP 627/6 for diagnosing 1995-97 MY Sedan Range, 1997 MY-ON XK8, 1998 MY-ON V8 XJ Series, and 2000 MY S-TYPE.
DATE
7/99
All
MODEL
All
VIN
New PDU Software JTP 626/5 and 627/6
ISSUE:
New PDU software has been released.
JTP 626/5 replaces 626/4.
JTP 627/6 replaces 627/5.
JTP 627/6 includes a new application for using the S-TYPE driveshaft balancing equipment.
ACTION:
Ensure that this software is installed immediately. Retain the previous issues in a secure place as a backup CD-ROM in the event the new software is damaged.
Use JTP 626/5 for diagnosing 1990-96 MY XJS and 1990-94 MY Sedan Range. Use JTP 627/6 for diagnosing 1995-97 MY Sedan Range, 1997 MY-ON XK8, 1998 MY-ON V8 XJ Series, and 2000 MY S-TYPE.
RENDER: 1.0x
NO RELATED
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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.