Page 2 of 2

Re: ANTI LOCK and Teves PUMP question!

Posted: Thu Jan 10, 2019 1:49 am
by old del boy
The ABS light is on because you have a fault in the ABS system , this is not the cause of the pump running continuously , this could be a faulty accumulator , faulty combined pressure switch [ on top of the pump colored blue or maybe a faulty pump relay [ black base in the drivers side footwell ] .

The ABS fault no 27 [ outlet valve ] could just be a bad connection or a fault in the wiring to it or it may be stuck , the warning light just warns you the ABS is disabled , this does not affect normal brake operation these are just my opinions and what i would check but maybe you need to give this to an expert in your area .

Derek..

Re: ANTI LOCK and Teves PUMP question!

Posted: Thu Jan 10, 2019 5:17 am
by swallow_che
old del boy wrote:The ABS light is on because you have a fault in the ABS system , this is not the cause of the pump running continuously , this could be a faulty accumulator , faulty combined pressure switch [ on top of the pump colored blue or maybe a faulty pump relay [ black base in the drivers side footwell ] .

The ABS fault no 27 [ outlet valve ] could just be a bad connection or a fault in the wiring to it or it may be stuck , the warning light just warns you the ABS is disabled , this does not affect normal brake operation these are just my opinions and what i would check but maybe you need to give this to an expert in your area .

Derek..



My accumulator is new, I thought replacing the accumulator would cure this issue at the beginning. But, the problem is still existing.

So, about pressure switch.. I have searched it on internet and it seems hard to find and expensive?
(any substitution do you know?)

I might have to replace the pump relay first as it's cheaper try!
do you know which relay? I found 3 relay for ABS pump.
+ Reverse inhibit relay DAC7687
+ Main relay DAC7151
+ Relay DAC4506

This relay can cure both symptoms(ABS light and pumping continuously) this time. This is possible, right?

And could you recommend which connections and wires to look at?

There aren't any expert here in South Korea. I have visited a Jaguar official service center and a jaguar specialist who have 25years experience. But they both don't know what to do. :cry:

Re: ANTI LOCK and Teves PUMP question!

Posted: Fri Jan 11, 2019 12:20 am
by old del boy
I am afraid you are asking more questions than i can answer , all i can do is give you a brief idea of how you might proceed , to answer your question about the ABS light , no the relay will not cure that problem , you need to fix the fault '' 27 '' , the relay is for the pump and my manual says it is the one with the black base which it plugs in to .

As for the pressure switch there are no new ones available so you might want to search for a secondhand one , you can use this website to find part numbers

https://www.jaguarclassicparts.com/uk/j ... r-and-pump

I am sorry i cannot help you more ,

Derek..

Re: ANTI LOCK and Teves PUMP question!

Posted: Fri Jan 11, 2019 10:35 am
by swallow_che
old del boy wrote:I am afraid you are asking more questions than i can answer , all i can do is give you a brief idea of how you might proceed , to answer your question about the ABS light , no the relay will not cure that problem , you need to fix the fault '' 27 '' , the relay is for the pump and my manual says it is the one with the black base which it plugs in to .

As for the pressure switch there are no new ones available so you might want to search for a secondhand one , you can use this website to find part numbers

https://www.jaguarclassicparts.com/uk/j ... r-and-pump

I am sorry i cannot help you more ,

Derek..



You have all the answers!! helping me very much! And actually XJ40 members are all I have..

This morning, I started my xj40 and before cranking the engine ABS Pump worked a little, stopped. Meaning pressure is up and switched off I think.
(This happens sometimes..)

And abs light was gone for a second after I was running about 30km/h.

So, my guess is the Combined Pressure Switch(JLM1908) on the ABS Pump.
I just order a used one on Amazon.

I will post if this solves the problem!