2004 xjr Transmission Fault
#61
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i installed it and it still does not turn on! what am I missing? I thought I read the aux heater pump should come on when the ignition is in position 2 with temp set on high with inside blower running. I checked fuse 8 in truck and it is not blown. what could be stopping it from coming on?
this may also explain why my hoses appear to be swollen because there is trapped air/steam in the system. i tried running engine several time with coolant top off of bottle.
Anyway, how does the Aux Heater Pump work?
this may also explain why my hoses appear to be swollen because there is trapped air/steam in the system. i tried running engine several time with coolant top off of bottle.
Anyway, how does the Aux Heater Pump work?
What you can do is find the relay for the aux pump and place a jumper between pins 3 & 5 and see if aux pump runs. (No need to turn ignition on for this test as its +12V direct power)
If pump runs it rules out wiring issues. If it doesn't run you might have bigger issues.
Relay/fuse for aux pump should be located in the front distribution fuse box, not trunk. Check fuse first...
I would also swap the aux pump relay with another known working relay. Finally, I would consider finding a jaguar aux pump but try the above with the other pump from MB and see what happens.
Last edited by abonano; 11-22-2016 at 09:41 PM.
#62
#63
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im a little confused on fuse relay location. my user guide says their in the trunk and i havent found any fuses that are blown? where do i go from here?
also, i looked at manual for transmission and it says to set the parking brake. im assuming they want you to take tranny through all gears and at finally gear 3 leave it there and set the parking brake. if so then i did the fill wrong as I put it back in park and then filled. this may be the issue as far as tranny goes I hope.
also, i looked at manual for transmission and it says to set the parking brake. im assuming they want you to take tranny through all gears and at finally gear 3 leave it there and set the parking brake. if so then i did the fill wrong as I put it back in park and then filled. this may be the issue as far as tranny goes I hope.
#64
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im a little confused on fuse relay location. my user guide says their in the trunk and i havent found any fuses that are blown? where do i go from here?
also, i looked at manual for transmission and it says to set the parking brake. im assuming they want you to take tranny through all gears and at finally gear 3 leave it there and set the parking brake. if so then i did the fill wrong as I put it back in park and then filled. this may be the issue as far as tranny goes I hope.
also, i looked at manual for transmission and it says to set the parking brake. im assuming they want you to take tranny through all gears and at finally gear 3 leave it there and set the parking brake. if so then i did the fill wrong as I put it back in park and then filled. this may be the issue as far as tranny goes I hope.
It does not tell me what any relay is for however. Maybe someone else can chip in with that info.
As far as leaving the transmission in 3rd with the brake on while filling up. I absolutely would NOT do that even if it says that in the manual.
I certainly did not do that as I had the car up on jack stands.
Someone in this forum went thru the fill process on jack stands and had his wheels spinning.
When he applied brakes guess what... the momentum of the wheels under braking transferred to the car which promptly came off the jack stands.
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abonano (11-23-2016)
#65
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http://www.jagrepair.com/images/Elec...al%20Guide.pdf
The schematics for every circuit are shown and the page before each schematic identifies and gives the location of every component, connector, splice and ground point used by the circuit.
For example, the auxilliary coolant pump is shown on figure 6.2 (pdf page 83). It shares the same relay as the blower motor, R1 in the Rear Power Distribution Fusebox (RPDF). Both the blower and aux pump are operated by the Climate Control Module. The fuse for the aux coolant pump is F8 (10A) in the RPDF.
The ground point used by the aux coolant pump is G3, in the engine compartment below the Front Power Distribution Fusebox.
Cheers,
Don
#66
#67
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Did you fix the misfire issue? I strongly recommend this prior to looking at transmissions codes. You could end up chasing your tail.
#69
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Potential causes:
Low or incorrect level fluid
Possible fluid pressure issue flagging false code (reflash might rectify as trans ages pressures vary)
Fluid leakage on TCM pins (leaking sleeve)
Bad MV solenoid in valve body.
Bad Valve Body (including bridge seal or seals connecting valve body to trans case)
Scorched E Clutch or Stator...
#70
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I am attaching the ZF 6HP26 On-Board Diagnostics manual. P0783 is triggered by the TCM calculating excessive slip during the 3-4 or 4-3 gear change. Here are a couple of pertinent sections from the manual:
![](https://cimg3.ibsrv.net/gimg/www.jaguarforums.com-vbulletin/706x226/capture_c38284afca94a3b43efaafa07b86e5aba0617062.jpg)
![](https://cimg8.ibsrv.net/gimg/www.jaguarforums.com-vbulletin/714x278/capture_2_7419749cfb992a7424d7307f7b172249f259128a.jpg)
Another important resource is the DTC Summaries manual, which you can download at this link:
https://www.google.com/url?sa=t&rct=...03388427,d.cWw
According to the DTC Summaries, possible causes of P0783 are:
ECM torque signal fault; or
Transmission mechanical failure
This may bring you back to Box's comments about a solenoid or other internal transmission problem, or could indicate a problem with the ECM torque signal which is communicated to the TCM via CAN. But it might be as simple as low fluid since low fluid pressure is one of the triggers.
It would be worth studying the manuals for all the sensor inputs involved to see if any of your other DTCs may indicate a problem with one of the same sensors referenced for gear changes. If you find any correlation, it would be worth cleaning the sensor, its electrical connector, and the ground point(s) used by the circuit.
If you'll list all the DTCs you have we'll try to help.
Cheers,
Don
Last edited by Don B; 11-23-2016 at 11:23 PM.
#71
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Thank you all for your continued assistance. I will check fluid again Monday. I tried yesterday but fluid got to 49 and I let it cool down. I then started working on the aux heat pump problem. I cleaned 2 ground points in front of the fuse distribution box behind passenger headlight. I then noticed as I pulled on the positive wire running to the heat pump, it came completely out of it sleeve! It must have gotten pinched and broke. This could be the reason the pump wasn't coming on. I will remove all the hoses and try and trace the point were it broke and reattach it.
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Don B (11-24-2016)
#72
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It sounds like you've found the problem with the pump!
While you're cleaning grounds, it would be worth also cleaning the one behind the left headlamp as well as the ones hidden under the windshield cowl covers over the brake master cylinder and the cabin air microfilter/ECM connector.
I can't recall whether we've mentioned checking the ECM electrical connector for signs of water ingress, but that is definitely worth doing. The connector is below the microfilter housing and above a water drain that tends to plug up with leaves and seeds, which allows water to pool around the connector. It's worth checking and cleaning just in case your ECM torque signal could be affected by water or corrosion on ECM connector pins.
Cheers,
Don
While you're cleaning grounds, it would be worth also cleaning the one behind the left headlamp as well as the ones hidden under the windshield cowl covers over the brake master cylinder and the cabin air microfilter/ECM connector.
I can't recall whether we've mentioned checking the ECM electrical connector for signs of water ingress, but that is definitely worth doing. The connector is below the microfilter housing and above a water drain that tends to plug up with leaves and seeds, which allows water to pool around the connector. It's worth checking and cleaning just in case your ECM torque signal could be affected by water or corrosion on ECM connector pins.
Cheers,
Don
#73
#74
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Good point, jackra_1. The torque spec for all the ground studs is just 6.5 ft. lbs., which is just slightly more than hand tight. Overtightening the nut can easily snap the studs off of the body because they are just spot-welded on.
#75
#76
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It sounds like you've found the problem with the pump!
While you're cleaning grounds, it would be worth also cleaning the one behind the left headlamp as well as the ones hidden under the windshield cowl covers over the brake master cylinder and the cabin air microfilter/ECM connector.
I can't recall whether we've mentioned checking the ECM electrical connector for signs of water ingress, but that is definitely worth doing. The connector is below the microfilter housing and above a water drain that tends to plug up with leaves and seeds, which allows water to pool around the connector. It's worth checking and cleaning just in case your ECM torque signal could be affected by water or corrosion on ECM connector pins.
Cheers,
Don
While you're cleaning grounds, it would be worth also cleaning the one behind the left headlamp as well as the ones hidden under the windshield cowl covers over the brake master cylinder and the cabin air microfilter/ECM connector.
I can't recall whether we've mentioned checking the ECM electrical connector for signs of water ingress, but that is definitely worth doing. The connector is below the microfilter housing and above a water drain that tends to plug up with leaves and seeds, which allows water to pool around the connector. It's worth checking and cleaning just in case your ECM torque signal could be affected by water or corrosion on ECM connector pins.
Cheers,
Don
where exactly is this connectir that everyone is talking about that leaks and gets fluid on it? is it on the top right back of tranny and round? if so it is very dry (dusty dry)
here is a picture of the positive wire that pulled out of the wire sleeve that goes to the aux heater pump.
Last edited by JaguarVDP; 11-24-2016 at 03:44 PM.
#77
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http://www.thectsc.com/images/pdf/6_...eplacement.pdf
Have a look at the above. Originally posted by Nbcat in this forum.
Have a look at the above. Originally posted by Nbcat in this forum.
Last edited by jackra_1; 11-24-2016 at 03:56 PM.
#78
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Good Morning all,
I was doing more research, and I found an old post back in 2010 from a Member on this board. The poster mentioned a code P0783 same as what mine has. He said he ended up changing the transmission. Poster also mentioned something I had been wondering, but didn't mention. He/She mentioned that their gear selector would go in gear without having to step on the brake. I noticed I have that same issue as well. I didn't know if this was normal, since the auto parking brake would come on. Could this be in connection with the P0783 issue, maybe a cause to the issue, or nothing to do with it at all? Whether key on/off or ignition on/off, you can just grab selector and put in gear without stepping on the brake pedal.
I was doing more research, and I found an old post back in 2010 from a Member on this board. The poster mentioned a code P0783 same as what mine has. He said he ended up changing the transmission. Poster also mentioned something I had been wondering, but didn't mention. He/She mentioned that their gear selector would go in gear without having to step on the brake. I noticed I have that same issue as well. I didn't know if this was normal, since the auto parking brake would come on. Could this be in connection with the P0783 issue, maybe a cause to the issue, or nothing to do with it at all? Whether key on/off or ignition on/off, you can just grab selector and put in gear without stepping on the brake pedal.
Last edited by JaguarVDP; 11-25-2016 at 09:05 AM.
#79
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Good Morning all,
I was doing more research, and I found an old post back in 2010 from a Member on this board. The poster mentioned a code P0783 same as what mine has. He said he ended up changing the transmission. Poster also mentioned something I had been wondering, but didn't mention. He/She mentioned that their gear selector would go in gear without having to step on the brake. I noticed I have that same issue as well. I didn't know if this was normal, since the auto parking brake would come on. Could this be in connection with the P0783 issue, maybe a cause to the issue, or nothing to do with it at all? Whether key on/off or ignition on/off, you can just grab selector and put in gear without stepping on the brake pedal.
I was doing more research, and I found an old post back in 2010 from a Member on this board. The poster mentioned a code P0783 same as what mine has. He said he ended up changing the transmission. Poster also mentioned something I had been wondering, but didn't mention. He/She mentioned that their gear selector would go in gear without having to step on the brake. I noticed I have that same issue as well. I didn't know if this was normal, since the auto parking brake would come on. Could this be in connection with the P0783 issue, maybe a cause to the issue, or nothing to do with it at all? Whether key on/off or ignition on/off, you can just grab selector and put in gear without stepping on the brake pedal.
#80
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Glory to GOD!! Aux Heater Pump is now working! it comes on when the blower is activated inside car. Now to work on the tranny.
Is there a way to check the solenoids to find out if one isnt working? I know there is 3 blue and 3 yellow?
How do I know which one is for 4th gear? or which isnt allowing tranny to go to 4 from 3rd? are all the blues the same and interchangeable as well as the yellows being the same?
I ask because I may have access to some spare ones if needed.
Thanks again
Is there a way to check the solenoids to find out if one isnt working? I know there is 3 blue and 3 yellow?
How do I know which one is for 4th gear? or which isnt allowing tranny to go to 4 from 3rd? are all the blues the same and interchangeable as well as the yellows being the same?
I ask because I may have access to some spare ones if needed.
Thanks again