In todays cars, with all the electronics, the battery is more important to the cart than just starting. All the modules use alot of the voltage that is produced. Alternators can only handle so much of a load. In todays cars, the battery assists the alternator with the load. Low voltages from the battery can cause problems where all the modules don't get the required voltage to operate. This its bout just jaguars, but all cars, and all electronics period. Disconnecting a battery, which used to be a good test of an alternator, will potentially cause catastrophic malfunction of certain modules, primarily ecm's and tcm's. Like i said, I'm talking about modern cars.

 

So, two days ago, I experienced another fault. I shut the car down, restarted, and today, took a 250 mile trip (which included lots of stop n go in large citities).

I had no problems today. I hope that was perhaps a little glitch.

I can say, it rained heavily the day it faulted. My connectors are still unprotected from the elements. I cant say if that was the cause or not. I mean moisture in the connector.

I will check back in here in a couple days.

 

I stand by what I said. Why drive with an eight yo battery?

 

usmc1211, will you send me another text message to my cell? I was forced to do a hard reset, and lost many existing contacts. I wanted to touch base w/ ya.

 

Hey that is definitely a tps ....either the connectors are lose,or either moisture getting into the connection..if the battery is good then it is in the connection.

 

I found that i have more work to do. Upon further research and investigation,i found that the previous generation xj8 with this problem required replacement of the tin pins inside the connector. My tps has five wires, the center pin is "gold". My next step is to preform the same tsb that was issued for the x308, replacing all tin connectors with gold and weatherproofing the connection. This will be cheap, under $10. I am an electronics technician, i have ALL the gear required, except the pins. Hopefully this is my last attempt. Buying a throttle body is definitely not in the budget!

 

UPDATE on previous repair, just the control harness replacement. Since my last post, it he's faulted four times. This was just during one day, last Friday. No fault since. I AM NOT DECLARING THE PROBLEM SOLVED! As mentioned in the above post, I will be performing the x308's TSB on it's TPS, replacing the female type tin connectors in the TPS writing harness connector. I am planning on conducting this next Tuesday.

 

Also,i need to know my confusion and if someone has an answer, please tell me. These tin connectors have been found by jaguar to be an issue in their vehicles. Why would they continue to use them. They are inexpensive to use, compared to the cost of different posts of this car. My best guess its that simple things like these, keep the jag owners returning their cars to the dealer for repair. User of a good quality component would lower the dollar amount profited in service and repair. Hell, that is must likely it. Its BS.

 

What takes place is that Jaguar subcontracts manufactures like others to make components and it is not until a problem comes up that they see it to be a problem. As for your throttle body you can have it rebuilt at a fraction of the cost for a replacement and you get a guarantee. The name of the company is ASI and I will provide a link.

Link ASI Welcome To Auto ECU Inc.

Link to my R&R JagRepair.com - Jaguar Repair Information Resource

 

I do understand how that works as well.

On the subject of a rebuild of the TB, these vehicle historically have the same issue.

As mentioned, the X308 had a TSB for this issue.

If the problem exists in the wiring, why rebuild it?

My Jag has just over 97000 miles on her. This issue first showed its face at around 74000. Even at 97000, that can be early for a sensor failure on a vehicle. I can be wrong of coarse. Nothing really has a expiration set in stone.

I definitely will not be sending my TB off for re-manufacture. I will attempt the cheapest plausible repairs first.

If all else fails, then I will move forward on either replacing it or rebuilding it.

On that note, thanks for the provided info on that company, perhaps it will be of service to me.

 

The throttle body replace you brought up in post #46 and is the only reason I posted the information.

As for the problem with the connectors you know as well as I do that a symptom for one thing could be caused by another. If a connection is the problem who is to say it is external or internal to the unit.

Only trying to help!

 

I didn't mean to come of offensive out rude. Im just hoping for the best. I appreciate your input, honestly.

 

Hello, but have you had the car scanned thoroughly?I mean with a very good scanner thats able to open parameters within the ecu to determine
what is causing this issue.Just to be on the safe side...As Gus said something else can be causing this issue not directly within the pins..Just a guess...but since I reside in Savannah,and I have a LAUNCH X431 platform scanner with lastest Jaguar software I am willing to aid you if needed.Let me know...

 

It has been scanned. I'm unsure with the quality of the device.
i may be in use of your service. How much would you charge me?

 

We are OK! At times I have a big mouth and a big foot.

 

My friend, I wouldnt charge you one dime,maybe a cold Yuengling...lol..912-667-8988 any weekend is ok....I can assure you that there are several codes that a Jaguar can have but wont trigger a MIL lamp on the cluster...my scanner will actually show them aswell.

 

Thought this may be helpful for the x350 owners
light Message Default Mode DTC
Amber
Gearbox
fault/Restricted performance
Gearbox default to set gear P0788
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0730
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0731
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0732
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0733
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0734
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0735
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0729
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0781
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0782
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0783
Red Engine systems fault
Engine shut-down (all
cylinders fuel cut)
P1224
Red Engine systems fault Limp-Home P1229
Red Engine systems fault Limp-Home
P0121, P0122, P0123, P0222,
P0223
Red Engine systems fault Limp-Home P1251, P1631
Red Engine systems fault Limp-Home P1611
Red Engine systems fault Limp-Home P1633
Red Engine systems fault High idle
P1344, P1122, P1123, P1215,
P1216
Red Restricted Performance Limp-Home unavailable P1254
Red Restricted Performance Limp-Home unavailable P1250
Red Restricted Performance Safety redundancy P1657, P1658
Red Restricted Performance Safety redundancy P16634
Amber Restricted Performance Engine speed limited P0116, P0117, P0118, P0125
Amber Restricted Performance Engine speed limited P0101, P0102, P0103, P0104
Amber Restricted Performance Engine speed limited P0300, P0301, p0302, P0303,
P0304, P0305, P0306, P0307,
P0308, P1313, P1314
Amber Restricted Performance Engine speed limited
P0327, P0328, P0332, P0333,P1648
Amber Restricted Performance Engine speed limited
P0351, P0352, P0353, P0354,
P0355, P0356, P0357, P0358,
P1367, P1368
Amber Restricted Performance Engine speed limited P0171, P0172, P0174, P0175
Amber Restricted Performance Engine speed limited
Amber Restricted Performance Engine speed limited
P0201, P0202, P0203, P0204,
P0205, P0206, P0207, P0208
Amber Restricted Performance Engine speed limited P0335, P0336
Amber Restricted Performance
Engine speed limited,
Reverse throttle progression
enabled
P1642
Amber Restricted Performance
Engine speed limited,
Reverse throttle progression
enabled
P1643
Amber Restricted Performance
Engine speed limited,
Reverse throttle progression
enabled
P0096, P0097, P0098
Amber Restricted Performance
Engine speed limited,
Reverse throttle progression
enabled
P1474
Amber Restricted Performance Engine speed limited P1234, P1236, P1338
Amber None P0506, P0507
Amber None P1656
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0725
Amber Gearbox default to set gear P1796
fault/Restricted performance
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0701
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P1603
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0605
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P1719
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0720
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0715
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0705
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0610
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0606
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0750
Amber Gearbox fault/Restricted
Gearbox default to set gear P0753
Restricted performance
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0755
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0758
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0760
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0763
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0765
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0768
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0770
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0773
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0740
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0743
Amber Gearbox fault/Restricted performance
Gearbox default to set gear P0787
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0784
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0829
Amber
Gearbox fault/Restricted performance
Engine speed limited,
reverse throttle progression
enabled
P1797
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0641
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0651
Amber
Gearbox fault/Restricted performance
Gearbox default to set gear P0860
Amber
Gearbox fault/Restricted performance
Limp-home P1783
Default mode Definitions
circuit malfunction, cyl 1 P0300 P0300
P0352 Ignition coil primary/secondary
circuit malfunction, cyl 3
REFER to possible sources forP0300
P0353 Ignition coil primary/secondary
circuit malfunction, cyl 5
REFER to actions forP0300
P0354 Ignition coil primary/secondary
circuit malfunction, cyl 7
REFER to actions forP0300
P0355 Ignition coil primary/secondary
circuit malfunction, cyl 2
REFER to possible sources for P0300
P0356 Ignition coil primary/secondary
circuit malfunction, cyl 4
REFER to possible sources for P0300
P0357 Ignition coil primary/secondary
circuit malfunction, cyl 6
REFER to possible sources for P0300
P0358 Ignition coil primary/secondary
circuit malfunction, cyl 8
REFER to possible sources for P0300
REFER to actions for P0300
P0603 ECM data corrupted
ECM
Contact dealer technical
support for advice on
possible ECM failure.
P1000 System checks not complete
since last memory clear
OBD monitors have not completed
Carry out
comprehensive
component monitor
drive cycle. Refer to the
DTC section of JTIS,
accessed by the icon on
the opening page.
P1111 System checks complete since
last memory clear
OBD monitors have completed No action necessary
P1313 Misfire rate catalyst damage,
right-hand cylinders. NOTE.
This DTC will flag only when
accompanied by a random or
individual cylinder misfire DTC;
P0300, P0301 to P0304
Refer to P0300 possible sources Refer to P0300 Actions
P1314
Misfire rate catalyst damage,
left-hand cylinders. NOTE. This
DTC will flag only when
accompanied by a random or
individual cylinder misfire DTC;
P0300 to P0308
Refer to P0300 possible sources Refer to P0300 Actions
P1316
Misfire excess emission. NOTE.
This DTC will flag only when
accompanied by an individual
cylinder misfire DTC; P0300 to
P0308
Refer to P0300 possible sources Refer to P0300 Actions
P1367
Ignition monitor (right-hand
cylinders)
Ignition monitoring circuit
between splice and ECM
open circuit, short circuit
to ground, or short circuit
to B+ voltage
Ignition coil group ground
circuit fault
Ignition coil relay failure
For coil circuit tests, GO
to Pinpoint Test
G290076p1.
.
P1368
Ignition monitor (left-hand
cylinders)
Ignition monitoring circuit
between splice and ECM
open circuit, short circuit
to ground, or short circuit
to B+ voltage
Ignition coil group ground
circuit fault
Ignition coil relay failure
For coil circuit tests, GO
to Pinpoint Test
G2900

 

I have a 2004 XJ8. I have owned the car only a few weeks, and it has gone into limp mode twice. The message center displayed DSC Not Available and Parking Brake Failure. Jaguar dealer can't find the root cause yet and still has the car. This is the secind time I have brought the car in to them with same problem. However, the first time the message center also displayed System Failure. If you restart the car, the messages go away and the car drive fine, but this is a dangerous problem when limp mode is activated. Why can't they pinpoint? What are the possible causes?

 

In most cases when all those warnings come on it is a problem with the throttle. Another possibility is a problem with the CAN network. If he loses rpm or speedo then I say CAN issue. If not then the throttle assembly will need to be replaced. The fault code will most likely be a P0121 or P2135.

 

Ok thanks. What is the CAN?