Trying to track down the P0411 code air injection pump problem on the '96 Jaguar XJ6



When I turn on the ‘97 parts car I get voltage to the pump with test light.



When I turn on the problem car the test light doesn't doesn't light up.



There is a five pin relay which I have tested and switched around between cars. That doesn't fix the no voltage problem but is the correct relay because the parts car doesn’t light up with it disconnected.

I've looked for a fuse but don't see any fuses labeled for air injection pump. The wiring appears normal and no evidence of rodent damage.

I also tested both pumps as I thought it was going to be a simple switch but they are both working fine when I give them 12 volts.

Hoping it’s a blown fuse if anyone can direct me?

Aside from that any and all suggestions welcome

Thanks

 

http://www.jaguarclub.sk/service/x30...al%20guide.pdf

25 amp fuse right engine bay fuse box

 

There is a diode in the short pigtail external to the pump and a solenoid inside the pump

Does the relay click as it will only be on for 60 seconds ( seems long ) on startup ?

I personaly saw a pigtail melted and had to build a new pigtail

 

I am beginning to get the same code. I will do what the guy in this video did.

 

Thank you for the replies. The 25 amp fuse is good. Next step is to find if I have voltage going to the fuse or not. As

 

Vee your video does not show but my computer is lacking

The fuse # 12 smog air pump relay " control " power should be good as you have your fuel injectors

 

The video shows a guy that cracks open the air pump, lubes up a solenoid and solves the problem.

​​​​www.youtube.com/watch?v=Ew8iRZirhII

 

I opened a X300 smog pump and was water damaged ( somehow ) and froze up so passed on it for another person in Virginia

 

I can’t take credit but my friendly mechanic figured it out. He told me the power supply from the fuse to the relay was the problem. A small connector appeared burned/corroded and intermittently worked while tracing the wiring with a test light. He soldered in a jump wire around the suspect connection which solved the problem. The system is functioning correctly and the check engine light is out.

Thank you for the help and suggestions.