Warning light MOT failure
Discussion
Our Mazda 3 has failed it's MOT because the traction control indicator is permanently lit. This is the one that would normally flash on and off to indicate a loss of traction. It does not illuminate on start-up and is located in the rev-counter dial.
The car has a separate DSC-OFF indicator which comes on briefly at start-up as normal, or stays lit if the DSC is turned off. There is also a separate ABS indicator which lights briefly on start-up and then goes out. These are both located in the speedo dial.
If the indicator showing temporary loss of traction wasn't lit and the other two by the speedo cycled as normal on start-up would it then pass the MOT?
The car has a separate DSC-OFF indicator which comes on briefly at start-up as normal, or stays lit if the DSC is turned off. There is also a separate ABS indicator which lights briefly on start-up and then goes out. These are both located in the speedo dial.
If the indicator showing temporary loss of traction wasn't lit and the other two by the speedo cycled as normal on start-up would it then pass the MOT?
If it isn't explicitly in the Reasons for Rejection, it must pass.
https://www.mot-testing.service.gov.uk/documents/m...
https://www.mot-testing.service.gov.uk/documents/m...
This indicator is not part of the normal start-up sequence.
Thanks, from that it looks like that because the light is on permanently it is indicating a fault, whether there is a fault or not, so it has failed. If there was no light and there was still a fault it would pass, as long as everything looked ok.
I'll check all the fuses and if that fails I suppose I'll have to get it diagnosed by a specialist.
Thanks, from that it looks like that because the light is on permanently it is indicating a fault, whether there is a fault or not, so it has failed. If there was no light and there was still a fault it would pass, as long as everything looked ok.
I'll check all the fuses and if that fails I suppose I'll have to get it diagnosed by a specialist.
The failure is quoted as per the link TooMany2cvs has mentioned above - 3.4 1.c. There just seems to be a 'drop down box' kind of arrangement with a list of standard failure reasons from which the tester picks the nearest one. I understand it is testable if there is a fault showing.
With a modern car I'd imagine it would be pretty difficult to 'disable' the indicator, without leaving other tell-tale signs and then it would fail for tampering - 3.4 4
The You Tube 'fix' only works if the battery has been disconnected.
Failure of the ABS/DSC unit on these cars appears to be a well know problem, so it's been sent away for reconditioning
With a modern car I'd imagine it would be pretty difficult to 'disable' the indicator, without leaving other tell-tale signs and then it would fail for tampering - 3.4 4
The You Tube 'fix' only works if the battery has been disconnected.
Failure of the ABS/DSC unit on these cars appears to be a well know problem, so it's been sent away for reconditioning
Edited by willld on Thursday 5th October 12:54
To get the car to pass without fixing the problem should be possible. You will have abs but no stability control. You’d have to remove the warning light from wherever it is, if there is a stability control button that would need to be removed to and replaced with a blank.
It’s possible on some cars, yes it’s technically a bodge but if done correctly it’ll pass the MOT.
It’s possible on some cars, yes it’s technically a bodge but if done correctly it’ll pass the MOT.
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