Question about 2002 Jaguar X-Type
Using a digital multimeter set to DC V check the terminal voltage of the battery. Then start the car, and have an assistant (or the Mrs) hold the engine revs to about 1500rpm, check again. Without the engine running you should see 11.5-12.5 V DC with the engine running you should see greater than 13.5V DC nom 14V at about 1500 rpm. If you don't see the higher voltage your new alternator is not working. If the terminal voltage (not running) is less than 11.5 VDC and the alternator appears to be working then get a new battery.
You can also see the battery voltage and other details in the hidden diagnostics, unfortunately not whilst driving though, See http//:www.bluejag.co.uk for details.
DTC P1111 is flagged after DTCs have been cleared, all engine management OBD diagnostic monitor drive cycles HAVE BEEN COMPLETED.
Hope this helps.
Posted on Apr 10, 2011
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Posted on Jan 02, 2017
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