13/08/2019
When you have a abs fault.
Abs lights or SRS. (Anti brakes system, safety restraint system) is often very very costly, you cannot legally drive your car on the road and it won't pass a MOT.
This image was a cost of just £180.00
Vauxhall price £****
So what's happened?
The mechanics who fitted the wheel bearing that has the abs sensor internally had not clipped back the wire correctly, leading to it running on the CV joint.
The shorting wire blew the abs unit (ECU) as it is a live excited system.
The ECU from vauxhall is around £750. The bearing £230. Plus a diagnosis fee and fitting fees.
How did we do?
Saving money, we purchased a used abs ECU and new bearing and it all worked as it should. The unit came with a 90 warranty. We could have fixed the old ECU, but for time and cost there was little point.
On other cars it has been down to wiring, a break In The wires to the sensors, damaged rings (a bumpy ring that the sensor uses)
To fuses or even connections.
Old skool v tech crew...
Being 35 years in mechanics and engineering obviously gives insight into life before computers and everything electronic.
The abs and srs systems are both independent and carry out limited functions.
Per tech crew. If you plug in the computer it would come up with no problems, it couldnt see a abs system, which put a light on the dash.
After fitting the new abs, if it wasn't a fuse or look fault it could be read, however it wasn't much help until you got to read live data from the car which pin points the fault.
Old skool was simple.
Pull plug and test abs ECU.
Pull connections and loom test.
Faults found. Parts ordered car fixed.
Can abs SRS fault be cleared?
Yes, depending on the fault. It's usually a good idea to understand why, and if the issue can be stopped occuring again. As you would have a illegal car and repeating costs.
Often it is the connections under the seats for SRS systems, for abs it's rings or inner wheel arch connections.
Prices vary from around £30.
That includes diagnosis and repair. A usual dealer price of £160+.