P38A Abs light tc light

pete12345

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• Aug 4, 2022

• #1

Thought I better start new post having changed all the brakes I got the car up on stands run it for a couple of minutes at over 7mph but have got tc light on and abs light on plugged in the nanocom but not really sure what to be looking for went into abs and sensor settings they were all the same and the nanocom saying no faults any help as always much appreciated

 

kermit_rr

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• Aug 4, 2022

• #2

Have you cleared the faults and then driven the car over 5mph? Otherwise the lights won't ever go away

 

pete12345

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• #3

Yer tried that but there weren’t any faults logged

 

kermit_rr

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• Aug 4, 2022

• #4

How often is the pump running?

 

Datatek

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• Aug 4, 2022

• #5

pete12345 said:

Yer tried that but there weren’t any faults logged

Click to expand...

Not sure on Nanocom, but if possible look at the individual signals from the sensors

 

pete12345

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• Aug 4, 2022

• #6

The nano does give a reading for the sensors I will check them out and report back thanks

 

brianp38dse

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• Aug 4, 2022

• #7

Brake peddle switch set correctly?

 

pete12345

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• Aug 4, 2022

• #8

Right here’s all the info I could get from nanocom hopefully somebody understands it better than I do

 

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kermit_rr

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• Aug 4, 2022

• #9

Looks like the brake switch does need adjusting. Is the brake light permanently on?
Rear right speed doesn't match the others?

 

pete12345

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• Aug 4, 2022

• #10

Did the brake switch on nanocom there both going to the open position when applied not sure what’s going on with rear right wheel speed any suggestions

 

Datatek

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• Aug 4, 2022

• #11

pete12345 said:

Did the brake switch on nanocom there both going to the open position when applied not sure what’s going on with rear right wheel speed any suggestions

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Either the sensor is not pushed fully home or it's duff. The problem is that I believe Nanocom lies about which sensor is which.

 

pete12345

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• Aug 4, 2022

• #12

Cheers data every thing helps will try sensor bit later

 

DanClarke

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• Aug 4, 2022

• #13

All except one sensor seems to be reading "low" in voltage terms to me. All mine are c.2.3V

 

pete12345

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• Aug 4, 2022

• #14

Thanks Dan is that with vehicle driving because when I’m parked I think mine reads 2,3 volts as well I seem to remover will check again

 

pete12345

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• Aug 5, 2022

• #15

Checked sensors again this morning after knocking in rear right a bit all seem to have gone mad now compared to yesterday’s results now reading rear left is out

 

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pwood999

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• Aug 5, 2022

• #16

Bear in mind that Nanocom does not display the sensor inputs for each corner correctly. This was notified to BBS by Marty ages ago, but we don't know if they fixed it.

Not sure if this is Thor Wabco-D specific, or also applies to GEMS Wabco-C

 

DanClarke

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• Aug 5, 2022

• #17

pete12345 said:

Thanks Dan is that with vehicle driving because when I’m parked I think mine reads 2,3 volts as well I seem to remover will check again

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Nope, mine is when it is stationary. All 3 originals are 2.3V and the replacement for the one that went "pop" says 2.2 or 2.1 (I forget).
Maybe a range or anything over 1.9 is actually good. I don't know, all I can tell you is what mine are reporting.
All should have a resistance of over 1.2KOhms and there should be 5.3V present at the connectors they plug into.
Only had failed ABS sensors to date, never anything more serious (touch wood), but I did snag a replacement Wabco-D off e-Bay.

 

pete12345

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• Aug 5, 2022

• #18

Thanks chaps I won’t be able to look into it until probably Monday now but will keep updating

 

pete12345

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• Aug 9, 2022

• #19

I’m still trying to work out the two different readings the rear right seems to have improved and now the rear left is wrong and the front right is miles different help ???????

 

Bix

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• Aug 13, 2022

• #20

Rear right and rear left are switched. It is possible you damaged the rear right sensor knocking it home which then shows rear left as being duff.