03 Self Leveling head light failure rates?
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This system continues to work properly on my wife's 2006 XK8, now nearing 100,000 miles. It appears to be made with better materials than the self-leveling headlamps in Jaguar's S-Type models (which are infamous for failure due to their lousy plastic parts). I'm very glad that my 2005 S-Type 3.0 does not have this system....
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From the Jaguar 2003 Service Training Guide:
The sensors send a PWM signal to the headlamps and they react according to that input.
When the ignition switch is turned to the ON position, the lamps go through an initialization cycle, which consists of the lamps moving to the most downward position and then moving to the driving position. If any faults are detected the lamps will retreat into a "home" position which is the most downward position.
If the front sensor goes faulty/disconnected the system may operate in a de-rated mode, while failure of the rear sensor makes the system go into a faulty/disconnected mode and the system does go to the "home" position.
The sensors send a PWM signal to the headlamps and they react according to that input.
When the ignition switch is turned to the ON position, the lamps go through an initialization cycle, which consists of the lamps moving to the most downward position and then moving to the driving position. If any faults are detected the lamps will retreat into a "home" position which is the most downward position.
If the front sensor goes faulty/disconnected the system may operate in a de-rated mode, while failure of the rear sensor makes the system go into a faulty/disconnected mode and the system does go to the "home" position.
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