02 KJ Electrical Weirdness...

redheadjeepygal · Jul 25, 2024

redheadjeepygal said:
it would start and drive but it would drain the battery as it ran and wouldn't charge back up had to recharge battery after i drove it

im not so sure the pcm had anything to do with the charging issue either was just trying to eliminate things

redheadjeepygal · Jul 25, 2024

i dont think its a charging issue since i replaced the alternator and the battery and the battery was holding charge after i installed those 2 new items yet im still having an issue with the asd relay. when the relay is in it will crank not start but when i pull the relay and jump it and it will start and run but i have tried replacing the relay with multiple new ones yet still same problem'

KJowner · Jul 26, 2024

If the SKIM is active you will get a red light on the dashboard. I'm fairly sure that the V6 is the same as the diesel, if the SKIM doesn't detect the chip in the key it allows the engine to start and run fir 20 seconds or so, then it immobilise it. If it's now charging correctly then you have sorted one fault out, however it isn't getting a run signal to hold the ASD relay in, check the ignition switch as a start, that's the first link in the supply.

DadOSix · Jul 26, 2024

What is "ASD" relay for?

Key off, send 12 volts to the ASD sense by splicing around the suspected problem area. Then key on. What could this harm? I worked on Jeeps for 8yrs. and while I didn't consider myself an electrical specialist I think that is a safe and proper method of finding the problem. What am I...

naxja.org

Jeepygal -

See the above for a description of how ASD works on an XJ. The logic is similar to KJ/KK.

Look at the whole tread - just not that post.

Interesting to note about where the different parts of the circuit power from - injectors, FP, coils.

Also - on an xj - 3 different fuses could be the culprit.

There is an 03 service manual link on here someplace - search manuals. You can find the wiring diagrams with fuse numbers and grounds on it.

Hope we are getting close. It seems so, as if you jumper the ASD out, you have a running jeep.

dtennes · Jul 26, 2024

KJ zGal said:
So, I just got the fuel pump replaced in my Renegade, (-$490), there was an issue when he tried to start it up again after he replaced it so he had to run a new ground to bypass the sentry key module (something I've posted about having issues with several times over the years, code NO SKIM BUS). Since then the Jeep has been very sluggish when starting, like it had a dead or dying battery (I figured that's what it was since it was quite old). Took it to Advance, they tested it, turned out the battery was bad. Bought a new battery (-$120), made no difference. Still sluggish starting up, had to try starting it twice before it actually caught. It runs fine and drives fine, no issues once it's running.

Had a couple come to take it out for a test drive last night (it's for sale at this point because it's too expensive to own two cars) and OF COURSE, as soon as they rev it up, it throws out something completely new: flickering lights, odometer shutting on and off, etc.

Today I went out, started her up, revved it a bit, lights flickered a little but nothing like yesterday. Turned it off, and wouldn't turn back on. Now it's so dead even the remote can't get the doors locked.

Long story short, I'm thinking alternator, which is a fairly easy swap I can do myself. My questions are a) do you think it is the alternator and b) if it is, how do I know which specific alternator to buy? I'm shooting for an OEM but there are several different versions (136 amp, etc.) Is it possible something got screwed up when my mechanic put the new ground in? It was fine before he touched it! He's always been good and fair, and people speak very highly of him so I'm hoping it's not his fault, but who knows?

Thoughts?

Stat

redheadjeepygal · Jul 27, 2024

Ok. Will do and thanks so much guys I appreciate it... I'll let ya know something soon..

Ronald · Aug 19, 2024

redheadjeepygal said:
Replaced the PCM Trying to get rid of the skim system and eliminate that that was a problem of any of the systems components that were inside the PCM However that did not work so put the original PCM back in and everything else back together However it is the ASD relay is still jumpered

say did you fix it?

DadOSix said:
To rid yourself of the skim, the pcm needs flashed AND the skim module needs unplugged before install of the flashed PCM

I am not sure how the charging issue leads to the skim module.

Usually the charge rate is controlled by the pcm. On most of these vehicles, there is a battery temperature sensor (located under the tray) that suspends charging if the battery is too hot.

Was this jeep not charging at all?

It is possible for a faulty Powertrain Control Module (PCM) to cause issues with the battery and alternator in a vehicle. Malfunctions in the PCM can disrupt the charging process, leading to battery problems and potentially affecting the alternator's performance.

02 KJ Electrical Weirdness...

redheadjeepygal

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redheadjeepygal

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KJowner

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DadOSix

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What is "ASD" relay for?

dtennes

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redheadjeepygal

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Ronald

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