XJ XJ6 / XJ8 / XJR ( X350 & X358 ) 2003 - 2009

OBD2 Port no power

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Old May 7, 2015 | 03:09 AM
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Default OBD2 Port no power

The amber engine light is up on the dash and I checked the water as the pump is leaking and found it below the low level mark. I topped it up but the light is still on. I got out my trusty OBD2 tool and no power so I tried a mates one and still no power. Is there a fuse for this? If not anyone no what the problem is?
 
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Old May 7, 2015 | 03:17 AM
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Yes there is a fuse for the OBD port, fuse locations are listed in your owners manual.

Fuse #16 in the cabin fuse box (the one down by the accelerator pedal)

It's a 5A fuse.
 
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Old May 7, 2015 | 03:25 AM
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Thanks for that Cambo. You only RTFM when all else fails!
 
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Old May 7, 2015 | 03:44 AM
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Back to the drawing board. Fuse is OK but just to make sure I replaced it F15 but no power.
 
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Old May 7, 2015 | 03:45 AM
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I meant to say I replaced it with fuse No15 not a 15A fuse
 
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Old May 7, 2015 | 03:46 AM
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Hahaha



If you are brave you could try to measure for voltage at the connector

16 battery power
4 ground

 
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Old May 7, 2015 | 03:49 AM
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Check F43 in the cabin fuse panel as well.
 
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Old May 7, 2015 | 04:28 AM
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Its not being brave Cambo its being the contortionist that hurts. So after shoving a torch down my throat and trying to read the multimeter whilst holding the probes was something else and the answer to whether there was power on pin 16 & 4 NO. However, went back to the computer with claret running out my of head and arm, haven't a clue how I did that, I saw check F43 and low and behold 5A fuse blown. Replaced and one OBD2 port working. Once I have stanched the flow of blood i will see what codes are up. Many thanks Cambo
 
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Old May 7, 2015 | 05:11 AM
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Big cats have teeth eh?
 
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Old Jul 3, 2018 | 07:10 AM
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Originally Posted by Cambo
Check F43 in the cabin fuse panel as well.
Which one is F43?

I have a dead OBD2 port. I was able to check the 5A fuse at Position #16 on the drivers side...where is Position #43?

Thanks.
 
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