Quote:
Originally Posted by
Snakeboy
They have taken both the whole ignition barrel and the ECU of a brand new identical bike they have in on the floor and replaced those with the same on my bike - but still got the error code 53 in the dash on my bike.
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The above would tend to suggest it's a wiring issue as you've eliminated the two main components from your enquiries. That just leaves what's connecting the two together. You may have to painstakingly do continuity tests on all the wires connecting the ECU to the immobiliser unit. Especially the yellow wire with a blue trace.
Also consider any shorts, water/damp or corrosion in the empty multiplug(s) under the seat for the factory fit alarm can cause the immobiliser to do funny things.