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Ecu Fault Code Reading


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I've not done a 20let but always put one in on XE builds.

For the 20XE Pin 22 from the ecu brown/blue wire goes to a lamp and an ignition 12v feed to the other side

This should light with ign on and go out when started, will also light when there is an error code

I normally add a switch to enter diagnostics mode to allow checking of stored error codes

Not all issues put the warning light on some are deemed only minor but can cause running problems
For this you connect pin 13 brown/yellow to a switch and the other side to earth, so i can just flick the switch and check codes whenever i want

Not sure if the 20let is the same but wouldn't supprise me as the ecu system is the same, but worth checking the wiring colors

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