XJ 2001 Relay question (the European 2,5TD version) - JeepForum.com
 
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post #1 of 11 Old 05-10-2021, 06:53 AM Thread Starter
Dry_Only
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XJ 2001 Relay question (the European 2,5TD version)

Hi Guys,
Sometimes my battery is completely drained. I have startet observing that sometimes the window wipers are running after the ignition is off and keys removed. Same goes for the radio. I am thinking those functions should be swithed off by a relay?

Any ideas appreciated.

BR
Jan

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post #2 of 11 Old 05-10-2021, 12:41 PM
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I think maybe the radio's on a timer so it'll stay on for fixed period after the ignition's off, but the wiper's definitely should stop. Whether/how they're controlled by a relay I've no idea (& my Haynes "Book of Lies" seems to be among the missing) but suspect your problem is the ignition switch - or its wiring. If it's not killing all the things that are supposed to be ignition controlled (e.g. HRW) it's perhaps not surprising your battery's draining.
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post #3 of 11 Old 05-11-2021, 01:03 AM Thread Starter
Dry_Only
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Thanks UKXJ
Will buy new and report back.
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post #4 of 11 Old 05-18-2021, 03:50 PM
skjeep
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I think that the ignition lock is so worn out, that you are able to pull the key out of it in the "minus 1 position"
That way remains your accessory under power without a key.
So do not turn the key fully towards driver when switching off. The real off position is one click before that.

current 2x XJ, 2x JK-U, SJ, M38A1, WJ
gone XJ, TJ, XK, ZJ
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post #5 of 11 Old 05-18-2021, 04:17 PM
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Now that would explain it - and suggests a temporary fix 'til the new one's installed.
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post #6 of 11 Old 05-19-2021, 06:31 AM
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Yes but being a 2001 it has a SKIM security key with chip.
So the best way how to do it is to buy a new uncoded ignition lock cylinder and have it coded for the original key.
Any locksmith should be able to do that. Otherwise you need to program a new key to the SKIM system

current 2x XJ, 2x JK-U, SJ, M38A1, WJ
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post #7 of 11 Old 05-19-2021, 01:00 PM
UKXJ
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Too complicated for me - & needlessly so, i-m-h-o.

But, just out of curiosity, how is that different (in practical terms) to earlier chips?

I thought ignition switches came with a pair of keys (but perhaps that varies from make to make or, possibly, market to market) but if a switch is as worn as you suggest, the key's going to be paper thin & almost smooth, so will need replacing anyway.
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post #8 of 11 Old 05-19-2021, 01:26 PM
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Quote:
Originally Posted by UKXJ View Post
But, just out of curiosity, how is that different (in practical terms) to earlier chips?
I thought ignition switches came with a pair of keys (but perhaps that varies from make to make or, possibly, market to market) but if a switch is as worn as you suggest, the key's going to be paper thin & almost smooth, so will need replacing anyway.

What earlier chips do you mean? SKIM was introduced in 1998, for XJ from MY 1999. So that is the first generation

Up to 1998 the security system was tied to RKE, not key.




And yes, you can buy allready pre-cut ignition lock with a pair of keys , but these will be without transponder. I am not aware of such set with transponder keys.
The lock cylinder is mechanicaly identical. So if you buy a set with 2 precut keys, you need to buy another one (2...8) keys WITH built in transponder, have it cut to match the lock cylinder and program into SKIM module. To program new keys you need a PIN code and DRB III scan tool.*
And that way you will have two different keys - one for doors and liftgate, other for ignition lock. Or you will have to replace/recode the door locks also.

* there is also an option to program a new key into SKIM without a DRBIII scanner, but it requires you to have 2 valid keys.

So IMHO to recode the ignition lock cylinder to match the original key is a better solution. Or you can try to order a precut key/cylinder combo thru the dealership.
But you have to program it anyway.

With the worn key... yer, the key will be partialy worn out, but it is made out of a chrome plated brass.
The tumblers inside the lock cylinder are brass or bronze, and are softer than the key material. So the cylinder wears out sooner than the key.
Sure the new key is the best solution, but in most cases it is enough to replace the lock cylinder.

current 2x XJ, 2x JK-U, SJ, M38A1, WJ
gone XJ, TJ, XK, ZJ
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post #9 of 11 Old 05-26-2021, 11:30 PM
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No relay to control accessories; it's controlled by the ignition switch.

But you could use a relay as a kill switch, using the ignition wire to power the relay that will in turn power accessories (see diagram). This would effectively cut off power to accessories while ignition is off. However, you will loose the ability to run accessories without ignition being on.

I know for a fact on WJs SKIM is a module that's separate from the ignition switch but being a euro XJ, things might be different.
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post #10 of 11 Old 05-27-2021, 04:19 AM
skjeep
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Quote:
Originally Posted by rep-tile View Post
I know for a fact on WJs SKIM is a module that's separate from the ignition switch but being a euro XJ, things might be different.

SKIM is the same for both Euro and US version and in late XJs it is the same as in TJ or WJ. The only difference is in the communication bus architectrure.
XJ and early TJ uses CCD bus. Later TJ and WJ uses PCI bus communication.


It is a separate module connected to other modules via CCD or PCI network. It has an antenna ring around the ignition lock. In the key there is a RFID chip programmed to SKIM. When you turn the ignition switch on, the SKIM module checks for a valid key. The key must be within the reach of the SKIM antenna (near field communication). When SKIM sees a valid key, it sends a valid key and secret code message to the cluster and PCM (and also to the diesel ECM for diesel).
But it has nothing to do with accessory power or ignition lock.


If you take your valid SKIM key and tape it to the SKIM module antenna with a duct tape or a zip tie, you can operate the ignition lock with whatever you want - for example a screwdriver, file or you can even twist the wires. It will run.

current 2x XJ, 2x JK-U, SJ, M38A1, WJ
gone XJ, TJ, XK, ZJ
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post #11 of 11 Old 05-27-2021, 04:47 AM
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[quote=Dry_Only;41267807]Hi Guys,
Sometimes my battery is completely drained. I have startet observing that sometimes the window wipers are running after the ignition is off and keys removed. Same goes for the radio. I am thinking those functions should be swithed off by a relay?

Any ideas appreciated.

BR
Jan[/quote

Duff Guff.
.
.
.
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Last edited by Delta0; 05-27-2021 at 05:03 AM. Reason: Duff Guff
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