the parking pawl is stuck and if you get someone to rock the car after its started with your foot in the brake you can get the shift to move as the car lunges forward as it rocks

 

You are not going to win if you do not get your voltage, at the modules, to show the green battery symbol at the top of your screen. You are still getting massive comm failures on all comm lines because of the low voltage!

 

I am going to clear the DTC and run SDD.

Interested in source for 2004 XJ shop manuals to service early 2004 XJ8 as I have a a couple of manuals on PDF (One I have but need another is 7729 page PDF but is 2005 and service manual needed for early 2004).

 

The main workshop manual is not for specific year. It covers all from 2003 through 2009. It shows variations by serial number/year differences where applicable.

 

Shop manuals are in the sticky at top of forum Sticky see section 21 and 22. Look at that sticky for a lot of other useful information. Good luck in getting your problem resolved.

 

SDD error popped up unexpectedly. Sellers of the device/SDD seeking I purchase support plan, or seek other technician. Spoke with local computer repair technicians.

 

Try turning off auto java update.

 

As suggested, based on the previous SDD session run, and Pin Out Tests run without finding a problem with tests ran, started a new Session, cleared DTCs and entered symptoms again, and run recommendations (see pics of SDD screens).












SDD Session 07/31/22 :
Cleared DTCs
Diagnosis run
Symptoms selected and SDD run (symptoms same as posted on Post number 1 from this thread)

 

Looks to me like your voltage dropped during the test. That will cause most of your faults found.

 

OldKarz
Thank you for your response.

What you see (I don't know how, but I appreciate you and all you do) is that as I was working I unplugged the battery charger in order to use that extension cord to plug in the SDD. When I unplugged the battery charger the voltage indicator went somewhat red (if I recall correct way it looked), so I plugged back in the battery charger and proceeded to obtain the above screen shots. I thought it went back to green once I put the extension cord back on the battery charger.

 

Below is the rework in SDD (from 08/06/22)

 

I will look again for a test I have previously seen in the manual for the j-gate see if I can get to the end of the test this time as previously it seemed to have ben a test for a different set of components.

 

After clearing all codes did you go back to SESSIONS and do a refresh? If not it will still be showing all or many of the old faults.

 

Yes, I do believe that I did that.

 

Need to be sure old codes were cleared. Attach power supply. Start new session and write down all codes - related and unrelated. Go to the clear codes option and follow those instructions. Exit session with bottom right button on sessions menu. Start new session and read codes again - do not resume session. Also list any dash lights and messages, these should all be entered when entering faults in SDD, do not limit it to just the transmission faults.
I think you have a B+ problem due to connections. Check your mega fuse box. Clean all connections including fuse contacts. Resistance test your fuses, although without amperage they will probably pass. Check voltage directly on battery terminals and supplied at entry to mega box and voltage exiting with ignition on and current being drawn. Fairly small losses can indicate a problem if only small current is being drawn. Since your battery appears to be staying green throughout SDD test the 100Amp fuse circuit should be OK - but test anyway. The bad connection can be further along, however the codes indicate a fairly widespread failure.

 

I will work on these points above points. Some have already checked and will recheck given time.

 

I found the Shop Manual (starting on page number 7595 in the transmission section) pages regarding the J-Gate. Remember when this problem started I swapped the j-gate and still no change then reinstalled original j-gate. I post this so you can read.

 

As OldKarz says, your voltage dropped off during the test.

Yep, soooo that is exactly what happens using a battery maintainer or battery charger that is not designed to maintain a constant voltage at 13.8 vdc at diagnostic currents that can exceed 20 amps DC.
Chargers and maintainers adjust the voltage during the cycles and at battery full charge will drop the VDC to about 12.6 VDC or even zero / off if the battery is full charged. Don't believe me? Put a DVM on your charger or maintainer and over a typical charge/maintain cycle you will see the charge cycles working and varying the voltages.
Don't be fooled by commercial chargers with high cranking amps, they are only big because they produce more amperes through a larger transformer, unless they have a very specific feature to set AND HOLD a constant output voltage of 13.8 VDC.

To properly diagnose all the modules on all the Networks, the voltage on the system busses must remain stabile at no less than 13.25 VDC MINIMUM.

The LAST thing you want is your power buss voltage to drop to battery voltage during programming/copmmissioning of a module, that is called "making a brick".

A 45 amp DC power supply is like $25 USD throuh Amazon, plus sacrificing a set of cheap $10 USD jumper cables from Harbor freight for wire and clamps, so why risk making a brick of a module that is worth $100 used or $1000 new?

That is called false economy.

Just do it correctly and eliminate one source of your testing failures that have you diving down rabbit holes.

 

Yes, I have been starting new sessions. I ran as few sessions yesterday. check as many selected symptoms as I can find on the SDD pull downs. The third session, I ran later on in the day, and the DTCs were the same. Note: I did notice the battery charger although it was on charge, after the second session slow down and the SDD voltage icon went red, and I will get another electrical tool that provide constant voltage. So back on to yesterday's DTCs (see pics).

 

Don't forget to do the voltage checks in the measurements section.