Not so long ago my partner tepee gave me this warning light/error. Soon enough connected it to Lexia diagbox, and learned that I had a faulty left rear wheel sensor/connection.
Today I swapped the sensor for a new one, and surprise surprise, the error remains. No signal coming from it. I looked at the plug, and the wiring looked ok (did not test with a multimeter, that will be next - what should I get between the terminals, 12V?). If the plug in the wheel arch is not to blame, where else do you suggest I look for a broken/shorting cable? Where do I find the "input" plugs for the sensors in the car (do the sensors cables converge, in to a BSI? where?).
It will almost always be that connector Luis it may pay you to do a continuity as far as you can trace the wiring into the loom but is suspect its the connector, just cut it off and use some shrink connectors.
The following 1 user says Thank You to polar for this post:1 user says Thank You to polar for this post • Luis Rosa
I take it you driven the car since fitting the new sensor?, the system will more than likely have to reach a certain speed (10 mph or so) to reset, I know other makes of car do this.
The wiring from the sensor will go to the big multi-plug that connects to the ABS pump, to do a continuity test on the wiring you will have to link the wires at the wheel arch connector then use the multimeter on the pins of the multi-plug, it would be helpful if you knew what pins of the plug were for the Left rear wheel.
If you have discs on the rear and they have the press on magnetic reluctor ring there could be a problem with that.
(30-12-2017, 10:30 AM)jj9 Wrote: I take it you driven the car since fitting the new sensor?, the system will more than likely have to reach a certain speed (10 mph or so) to reset, I know other makes of car do this.
The wiring from the sensor will go to the big multi-plug that connects to the ABS pump, to do a continuity test on the wiring you will have to link the wires at the wheel arch connector then use the multimeter on the pins of the multi-plug, it would be helpful if you knew what pins of the plug were for the Left rear wheel.
If you have discs on the rear and they have the press on magnetic reluctor ring there could be a problem with that.
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Hello!.
yes, i have driven the car on a very short trip. passed the 16km/h for sure.
30-12-2017, 11:34 AM (This post was last modified: 30-12-2017, 11:38 AM by jj9.)
Ok.
If the magnetic ring is the kind I'm thinking of, (see attachment) you really can't tell if they are ok or not, they are quite fragile and can easily be damaged if the disc / hub is placed down on the ring.
But you need a continuity test done on the wiring from the sensor before doing anything else.
We had this fault on a 64 plate Partner tepee on Friday.
Check the twisted wiring before the sensor, it usually corrodes at the points where the cable ties hold it very firmly (too tight). You need to examine it very carefully, but it will 99% be a broken wire at one of these clip points.
Was just gonna say exactly what light has, we used to do no end of 307’s and it was normally the cable tie above the exhaust heat shield, it pinched the convoluted tubing and this chafes the wire, then generally it goes green as water gets on the copper centre, eventually it dies and fails to make a connection
The following 1 user says Thank You to dumdum for this post:1 user says Thank You to dumdum for this post • Luis Rosa
The error description I get from Lexia specifically indicates a short-circuit, short-to-mass or an open circuit in this sensor. Upon cleaning the error with the software (and already with a new sensor installed), the error is again detected without even moving the car, so the faulty wiring/plug seems to me like the most probable cause. I will wait for a rainless day, so that I can search properly...In the meantime, no ABS nor ESR.
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