Hi there, I'm looking for a bit of help with my recently inherited XJ8 sport, a beautiful car but with what i hope a simple fault, it runs but has "restricted performance" due to the airflow meter being disconnected, now i would love to just plug it back in, but the "mechanic" who last looked at the car for my grandfather has chopped the plug of and soldered connectors on, but i dont know in what order they would go onto the air flow meter. Its a Denso lja1620ae airflow with 5 pins. So if anyone could please tell me which colour goes where or send me a picture of theirs that would be great.

Thanks so much for your help.

Russ

 

Russ,
A model year might be helpful. Welcome to forum, there is plenty of info to go around just for the asking. I can't help since my data base doesn't include your car, but many have the JTIS disk and I'm sure you'll get your answer.

There is also a lot of info in sticky folds as well as the intro area. Alot of good gouge there as well. Hope you get it fixed without to much hassle.

Dave

 

Sorry, of course i should have stated its a 1998 R reg XJ8 3.2 sport.

Thanks

 

Hi
Not sure, but I think you are asking for MAFS wiring connections.

Here is 2 sections of the 2002 XJ (X308) wiring diagram information for MAFS showing 5 wires connected to MAFS (BW - Black with white stripe, GW - Green with white stripe, WU - White with Blue stripe, BG - Black with Green stripe, Orange with no stripe):



If you cannot view the JPEG, then use this weblink to view it:

http://i1178.photobucket.com/albums/...ingdiagram.jpg

Jim Lombardi

 

Top man JL

 

Indeed that is what i'm looking for, but now i need to know how that looks in real life, i dont know from that which wire goes to which pin. I've looked and there are no pin no's on the MAFS

Thanks for all your help.
Russ

 

At the front of the electrical diagram pdf book, there is a section calling out the pinout arrangements of the different connectors. On the particular page for any system, the connectors will be identified by type. If you match up the two, then you know which wire goes where.

An alternative is to look at or get a picture of the connector with wires attached on another exact or similar model car.

 

Hello Russ....what in hell's teeth posessed this so called 'mechanic' to chop off the wiring to the MAF??
Obviously knows nothing of how amodern EFI system works....plonker!!
The diagram that has been put forward is for the AJ27 engine which has a different MAF meter compared to the previous AJ26 which yours is.
Surprises me it runs at all...fuel consumption must be attrocious ;o]

 

Hi Russ
When I did the research I did not have your model year (1998) or your engine type (A26 3.2).

Here is the section of the Electrical diagram for 1998 XJ 3.2 A26 for MAFS wiring connection:



If you cannot view the JPEG, then use this weblink to view it:

http://i1178.photobucket.com/albums/...ingdiagram.jpg

The MAFS wiring connector plugs into the MAFS (Mass AirFlow Sensor) socket with the group of 3 pins (5, 2, and 1) for MAF sensor and group of 2 pins (4 and 3) for IATS (Intake Air Temperature Sensor) that are located in the MAFS enclosure.

I searched the internet for a photo of your MAFS with its wires connected with no success.

Maybe you can match up the wires to MAFS according to the wiring diagram in this post.

Looks like there is a group of 3 wires and a group of 2 wires that form the connector plug-in.

The MAFS wiring socket should be the same configuration.

Hi Plums - The Electrical PDF book does not have the pin-out guide (picture of the connector showing pin locations in the connector) for PI35/ 5-WAY connector (MAFS connector).

Jim Lombardi

 

Is this guy good or what ? (JL)

 

ok, thats brilliant, thanks guys. now can anyone post a picture of the the plug on their actual car?

 

Hi Russ
Apparently it is not so brilliant.

I just compared the AJ27 diagram of the MAFS connector to the connector that is in our 2001 XJ8 engine compartment and the colors of the wires are in a different order than the ones in the diagram.

Maybe the diagram only shows the color wire for each numbered pin and the pins inside the connector might be in order from pin 1 to pin 5.

That is what I found when I inspected our MAFS connector. arranged from right to left - WU is pin 1, BW is pin 2, GW is pin3, O is pin 4 and BG is pin 5.



Someone - Please take a photo of their 1998 XJ AJ26 MAFS connector wires.

Also Russ, you might try to call a breaker (used parts place) to see if you can get a used replacement wire harness (or just the wires with the connector).

Then you could splice them into your wiring harness.

Jim Lombardi

 

Guys, thank you so much for your continued help here.
Right update, using the above pictures and 4.0 mafs connection pic, i used the same logic and worked the 5 colours from right (pin 1) to left (pin 5) and it would not run. with all wires disconnected it runs, but in "restricted performance". and just to clarify, my wires are the same colours as described in the correct wiring diagram pic. I think the easiest way would be for some one to supply a picture for me to compare to.

Have tried breakers, but no one wants to cut a loom up for one plug!! Understanably.

 

Hi Russ
Maybe this photo of our 2001 XJ8 4.0 AJ27 MAFS might help to show you the arrangement of the colored wires:




If you are not able to view the photo, then use this weblink to the photo on mediafire.com:

http://i1178.photobucket.com/albums/...Sphotoshot.jpg

Jim Lombardi

 

Thanks for that, I only have 1 different wire colour so assuming the other 4 are the same configuration, it should work. But doesn't! LOL. Mine is a different MAFS to the one pictured, so a possibility of a different configuration. Maybe my MAFS is goosed too? Anyone got one for sale?thanks. Russ

 

Hi Russ

I found this other forum thread (01 xj8 maf sensor - has posts on cleaning mafs and checking for air leaks and maybe checking mafs with ohms meter):

https://www.jaguarforums.com/forum/x...-sensor-73742/

I also created another PDF file from JTIS21 shop manual - diagnosing MAF sensor:

1998 XJ Diagnosing MAF sensor JTIS21.pdf

There is a used Mass Air Flow part# LJA1620AE on Ebay UK (breaker in Derby) Buy It now price is 39.75 pounds (free shipping) also has their phone number and mentions that they will give advice on fitting this part.

Maybe they also have the wire harness with the connector. Does not hurt to ask them to give you the connector with its wires attached. Especially when you are buying the MAFS from them.

Ebay UK Item number: 280902418488

Jim Lombardi

 

deleted due to significant errors... sorry for the confusion.

 

Hi QuadManic
98 Diagram has Pin 5 as BY, Pin 4 as BG, Pin 3 as UP, Pin 2 as GY, Pin 1 as WU

I updated my 2001 XJ8 MAFS Photo with the 1998 info:



Here is a larger photo showing 2001 XJ8 MAFS Location and its connector:



We are starting to get a lot of dust in the engine compartment. Car is running perfectly and I do not want to take a chance (putting any water in there).
Jim Lombardi

 

Thanks for that. But know i'm really confused as that differs from the interpretation in the above picture?

Need an actual photo i think.

Thanks Guys

 

Don't know where I was coming from the other night, but I made it unusually difficult and WRONG!

Jim Lombardi is correct with his drawings as per the 98 wiring diagram below. Pin one (as per Jim's picture) is on the right. Note the small numbers next to each wire on the drawn diagram (example: -3 is pin 3).

SO, in his pic, copied below, (ignore the actual wire colors in the picture, it is a pic of a newer year) the 98 wire colors are (from right to left on the connector as pictured):

Pin 1 = White/blue stripe
Pin 2 = Green/yellow stripe
Pin 3 = Blue/purple stripe
Pin 4 = Black/green stripe
Pin 5 = Black/Yellow stripe

Sorry for any confusion - I'm going to delete my earlier, incorrect post.