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.
JDS - Software Changes: Overview
1991 Jaguar XJ-6 L6-4.0LSECTION Overview
90jaguar09 JAGUAR
JDS SOFTWARE DIAGNOSTIC
SYSTEM
NO: 57
1991 MY
Model: SEDAN RANGE Date: NOVEMBER, 1990
KEY POINTS: SOFTWARE ISSUE 4050
Software issue 4050 should be used to test tbe electrical system on 1991 my Sedan Range vehicles. For information on vehicle changes refer to Sedan Range Model Year Update 1991, (S-69).
SOFTWARE CHANGES
In addition to the software changes required due to vehicle modifications, four operating changes have been incorporated into software issue DBC 4050. These are fully detailed in the following section.
JDS SOFTWARE DIAGNOSTIC
SYSTEM
NO: 57
1991 MY
Model: SEDAN RANGE Date: NOVEMBER, 1990
KEY POINTS: SOFTWARE ISSUE 4050
Software issue 4050 should be used to test tbe electrical system on 1991 my Sedan Range vehicles. For information on vehicle changes refer to Sedan Range Model Year Update 1991, (S-69).
SOFTWARE CHANGES
In addition to the software changes required due to vehicle modifications, four operating changes have been incorporated into software issue DBC 4050. These are fully detailed in the following section.
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.