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Old 06-29-2014, 12:38 PM
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usual ABS and brake light problems.

Ok I posted this info on a wrong forum so I hope this gives me mere help?

Newbie here!
This is an 02 plate crd limited edition swb. by the way.

Taken on a repair to sort an ABS problem, as the rear diff has a sensor read out of .623 ohms , I guess its ok .
I replaced the front hub (s/h) with warranty c/w abs sensor , and replaced the ABS MODULE AS THE LIGHT IS ON THE DASH ., (SORRY CAPS), and its said they are troublesome, the other light is the brake symbol. The result nothing still no abs , is there anything like clearing previous faults and with what diagnostic apart from dealers especially given the age of vehicle there charges are well out of it.
IM stuck can anyone help please.

Its a KJ Cherokee CRD UK spec 2002 which looks like the same as Liberty .


Ok , sorry I mentioned it at the beginning , its a CHEROKEE CRD Shortwheel base 2002 diesel.
Anything further with the EBD system you can tell me please.

If its worth mentioning , after I fitted the two replacement units as I said the lights remained , then I remembered the sensor on the diff was disconnected. I replaced this and checked the dash with ignition on and both lights went off and stayed off once the handbrake was released as well. Went for a short distance driving and the lights came on again!
I haven't been able replicate that situation since.
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Old 06-29-2014, 12:58 PM
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Re: usual ABS and brake light problems.

As mentioned before, you need to have it scanned to know what is causing the fault. Otherwise its shooting in the dark.
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Old 06-30-2014, 01:09 AM
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Re: usual ABS and brake light problems.

Yep , I know , but when on a budget and the nearest scanner is 50 mls away and ther vehicle is out of tax and test I have to do it by this forum.
I have since the last post tested the resistances of the sensors for the front hubs and the drivers side r/h in my case has no value , so I can assume that this is my reason for the abs system to be at fault. The other fault which is flagging up is the manual code I get on the dash P0500, this I understand is the speed sensor in the rear diff , the does show a reading on my fluke so may have to change that as well, just trying to limit costs.
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Old 06-30-2014, 07:08 AM
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Re: usual ABS and brake light problems.

The connector on the rear diff sensor was disconnected, do you know why? Is the speedometer working now? If so, then the sensor on the rear diff should be ok.
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Old 06-30-2014, 09:50 AM
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Re: usual ABS and brake light problems.

It was disconnected a while ago for inspection and testing, so that's why it was off. Since reconnecting now , no the speedometer doesn't work . So are you saying that ultimately if the speedo is not working it's definitely down to this sensor?
It's just that I got a reasonable ohms reading which corresponded to advice sought off another site .
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Old 06-30-2014, 10:10 PM
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Re: usual ABS and brake light problems.

Since you still have the P0500 code, there must be something wrong with the speed sensor or wiring. This system is quite different then we have on the WJ, where the rear wheel speed sensors from the ABS are used as signals for the speedometer.
Where does the wire go from the speed sensor? Direct to the PCM? I would at least measure this wire for continuity and short to ground.
Just to be sure, you probably can test the speedometer as with the WJ; with ignition switch in off, push the odometer reset knob and then switch ignition in run. All instrument lights will light up and all indicators go to full scale and back to normal position.
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Old 07-01-2014, 01:08 AM
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Re: usual ABS and brake light problems.

That's great , many thanks , I have last night taken a test of the wiring to the sensor and measured a little over 10v . So Ican assume that a least there is something else to rule out . I will do your test of the speedometer today when I return from work. This vehicle has had a new speedo sluster in the past Im told so they can be problematical.
I will also test the abs module for power and check it source.
Cheers Pat
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Old 07-01-2014, 01:53 AM
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Re: usual ABS and brake light problems.

I did a quick test of the speedo before I went to work with no result . Having read your last post I think I'll do it again as I didn't keep the trip pushed in while switching on! Will let you know
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Old 07-01-2014, 05:06 PM
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Re: usual ABS and brake light problems.

Yep speedo seems to work , so I think the next test is to jack the car up and see if there is a pulse when checking the rotation against signal.
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Old 07-17-2014, 02:59 AM
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Re: usual ABS and brake light problems.

Can someone tell me if there are two sensors on the uk version of the KJ Cherokee.
I have been told that there are two but all I see is what looks like the reverse switch.
There are no rear ABS sensors on the wheels but there is a sensor on the top of the central diff.
Its the first of the new shape on 2002 year. 2.5 vm diesel.
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