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 BULLETINSCLIMATE CONTROL SYSTEM INSTABILITY
1991 Jaguar XJ-6 L6-4.0L
Climate Control System Instability
1991 Jaguar XJ-6 L6-4.0LSECTION Climate Control System Instability
91jaguar01
SECTION: 82
No: 21
CLIMATE CONTROL SYSTEM
Model: 88-91 MY SEDANS Date: FEBRUARY, 1991
KEY POINTS: TEMPERATURE INSTABILITY/ LACK OF FOOTWELL HEAT
ISSUE:
Climate Control System instability or lack of front footwell heat resulting in unnecessary replacement of the A/C control panel or ECU.
ACTION:
On pre-VIN 605855 vehicles which exhibit temperature instability, install a motorized aspirator kit (consisting of JLM 1947 and CBC 9133). For kit installation procedure, refer to Technical Bulletin section 82, number 13.
If additional footwell heat is required on post-VIN 605856 vehicles, select "Manual" mode and increase the temperature setting and adjust the face vent slide control to the desired temperature.
NOTE: Do not replace the A/C control panel or ECU unless a permanent component fault exists.
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.