Help with airflow wiring please??
#1
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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
Thanks so much for your help.
Russ
#2
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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
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
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xj8sport (07-05-2012)
#3
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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
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
Thanks
#4
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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):
![Name: XJX308MAFSwiringdiagram.jpg
Views: 5528
Size: 45.3 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/163342d1501270763-help-airflow-wiring-please-xjx308mafswiringdiagram.jpg)
If you cannot view the JPEG, then use this weblink to view it:
http://i1178.photobucket.com/albums/...ingdiagram.jpg
Jim Lombardi
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):
![Name: XJX308MAFSwiringdiagram.jpg
Views: 5528
Size: 45.3 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/163342d1501270763-help-airflow-wiring-please-xjx308mafswiringdiagram.jpg)
If you cannot view the JPEG, then use this weblink to view it:
http://i1178.photobucket.com/albums/...ingdiagram.jpg
Jim Lombardi
Last edited by jimlombardi; 07-05-2012 at 06:35 PM.
#5
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#6
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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):
![](http://i1178.photobucket.com/albums/x367/Jim0206/XJX308MAFSwiringdiagram.jpg)
If you cannot view the JPEG, then use this weblink to view it:
http://i1178.photobucket.com/albums/...ingdiagram.jpg
Jim Lombardi
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):
![](http://i1178.photobucket.com/albums/x367/Jim0206/XJX308MAFSwiringdiagram.jpg)
If you cannot view the JPEG, then use this weblink to view it:
http://i1178.photobucket.com/albums/...ingdiagram.jpg
Jim Lombardi
Thanks for all your help.
Russ
#7
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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.
An alternative is to look at or get a picture of the connector with wires attached on another exact or similar model car.
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#8
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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]
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]
#9
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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:
![Name: XJX308A26engineMAFSwiringdiagram.jpg
Views: 17011
Size: 59.9 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/163321d1501270715-help-airflow-wiring-please-xjx308a26enginemafswiringdiagram.jpg)
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
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:
![Name: XJX308A26engineMAFSwiringdiagram.jpg
Views: 17011
Size: 59.9 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/163321d1501270715-help-airflow-wiring-please-xjx308a26enginemafswiringdiagram.jpg)
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
Last edited by jimlombardi; 07-06-2012 at 09:39 AM.
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xj8sport (07-06-2012)
#12
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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.
![Name: 2001ourXJX308MAFSwiringdiagram.jpg
Views: 3429
Size: 60.9 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/163310d1501270689-help-airflow-wiring-please-2001ourxjx308mafswiringdiagram.jpg)
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
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.
![Name: 2001ourXJX308MAFSwiringdiagram.jpg
Views: 3429
Size: 60.9 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/163310d1501270689-help-airflow-wiring-please-2001ourxjx308mafswiringdiagram.jpg)
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
Last edited by jimlombardi; 07-06-2012 at 04:41 PM.
#13
![Default](/forum/images/icons/icon1.gif)
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.
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.
#14
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Hi Russ
Maybe this photo of our 2001 XJ8 4.0 AJ27 MAFS might help to show you the arrangement of the colored wires:
![Name: our2001XJ840MAFSphotoshot.jpg
Views: 2622
Size: 71.4 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/163307d1501270689-help-airflow-wiring-please-our2001xj840mafsphotoshot.jpg)
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
Maybe this photo of our 2001 XJ8 4.0 AJ27 MAFS might help to show you the arrangement of the colored wires:
![Name: our2001XJ840MAFSphotoshot.jpg
Views: 2622
Size: 71.4 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/163307d1501270689-help-airflow-wiring-please-our2001xj840mafsphotoshot.jpg)
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
#15
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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
#16
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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
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
Last edited by jimlombardi; 07-09-2012 at 09:03 PM.
#18
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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:
![Name: our2001XJ840MAFSphotoshotA.jpg
Views: 2735
Size: 16.9 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/163274d1501270626-help-airflow-wiring-please-our2001xj840mafsphotoshota.jpg)
Here is a larger photo showing 2001 XJ8 MAFS Location and its connector:
![Name: our2001XJ840MAFSphotoshot.jpg
Views: 5044
Size: 71.4 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/163275d1501270626-help-airflow-wiring-please-our2001xj840mafsphotoshot.jpg)
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
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:
![Name: our2001XJ840MAFSphotoshotA.jpg
Views: 2735
Size: 16.9 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/163274d1501270626-help-airflow-wiring-please-our2001xj840mafsphotoshota.jpg)
Here is a larger photo showing 2001 XJ8 MAFS Location and its connector:
![Name: our2001XJ840MAFSphotoshot.jpg
Views: 5044
Size: 71.4 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/163275d1501270626-help-airflow-wiring-please-our2001xj840mafsphotoshot.jpg)
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
Last edited by jimlombardi; 07-10-2012 at 07:10 AM.
#19
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Heck, I've already done most of the decoding - let me finish it.
On your MAF, from front to back (going from left to right, as in the picture of the 01 above) the 1998 color codes should be:
Black/green stripe
Blue/Purple stripe
Green/yellow stripe
Black/yellow stripe
White/blue stripe
Need an actual photo i think.
Thanks Guys
#20
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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.
Last edited by QuadManiac; 07-12-2012 at 01:38 AM.
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xj8sport (07-12-2012)