ABS Woes

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ripface

New Member
Posts
18
Hi All,

Decided to sell on the Range Rover Westminster at the tail end of last year as I was made redundant and "No Job + 17 MPG = Stoney Broke".

Over Christmas and the New Year no queries. MOT was due in March so I thought I'd get a better response selling with a new MOT. Popped it into the local garage and the only issue was an ABS Fault that had been appearing since the cold spell, but usually cleared itself. Now it wasn't, so had to be fixed for the MOT.

The garage ran diags and found that the rear near side sensor needed replacing. Replaced the sensor, but subsequent diag run called error 4125 on the left had rear sensor (The new one!!) and listing it as a "Short Between Sensors).

The garage rang around the local specialist who reckons that the problem is with the Engine ECU!! Sounds a bit suspect to me, but they are the experts ... apparently! Does anyone have another take on this? Would replacing the Engine ECU resolve an ABS Fault?

Of course the 2001 Range Rover needs a specific ECU (NNN100660) and no other one will do. These are like hen's teeth, and are over a grand new. I'd rather not spend 000's on a part that might not resolve the issue.

Any ideas Guys?

Cheers,
Ripface.
 
Hi All,

Decided to sell on the Range Rover Westminster at the tail end of last year as I was made redundant and "No Job + 17 MPG = Stoney Broke".

Over Christmas and the New Year no queries. MOT was due in March so I thought I'd get a better response selling with a new MOT. Popped it into the local garage and the only issue was an ABS Fault that had been appearing since the cold spell, but usually cleared itself. Now it wasn't, so had to be fixed for the MOT.

The garage ran diags and found that the rear near side sensor needed replacing. Replaced the sensor, but subsequent diag run called error 4125 on the left had rear sensor (The new one!!) and listing it as a "Short Between Sensors).

The garage rang around the local specialist who reckons that the problem is with the Engine ECU!! Sounds a bit suspect to me, but they are the experts ... apparently! Does anyone have another take on this? Would replacing the Engine ECU resolve an ABS Fault?

Of course the 2001 Range Rover needs a specific ECU (NNN100660) and no other one will do. These are like hen's teeth, and are over a grand new. I'd rather not spend 000's on a part that might not resolve the issue.

Any ideas Guys?

Cheers,
Ripface.

Sounds a bit silly to me. The signals from the sensors are taken back to the ABS ECU and compared by that ECU. If there was a short between sensors i would think it would be in the ABS ECU and not the engine ECU. ECUs do talk to each other but think the ABS ECU would be the one to look at. But first of all i would check that the NEW sensor is not faulty, if this fault did not appear until it was fitted.
 
A location would be useful, but like a lot on here, they either can't be bothered or they are fightened someone may nick their P38...No Chance !!!:hysterically_laughi

As Wammers said, tie up with ABS and associated stuff and the engine ECU is slight, although road speed is fed back to the engine ECU with regard to fuel consumption calculation and other functions.
The run error 4125 indicates that a generic fault reader has been used instead of dedicated P38 diagnostics. As most people on here know, apart from the EAS and some engine codes, dedicated software such as Test Book/Autologic/Faultmate-Rovacom is the only way to go when trying to pinpoint faults accurately.
It's easy to just swap components willy nilly...if you have them, but long winded. Best to get it checked out properly and get the fault accurately pinpointed first.
 
Ah!

Location? Bonnie Scotland .... Aberdeenshire to be precise!!

Thanks for the replies gents ... a lot of sense there, I have a reasonably local Rangie specialist that may have a testbook so will flash some wonga and see if they can help. Already up to my hock with the local garage and didn't really want to go elsewhere and run up another *huge* bill. 'Specially as I've just change jobs with a 50% cut in salary!!

Life sucks sometimes ....

: ((

Cheers everyone,
Sad Ripface.
 
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