Hello everyone, I have a problem with the rear differential lock. I switch the system to low 4 × 4, press the lock button, the lamp flashes for a few seconds ... and turns off. I want to note that every time I start the engine, the lock lamp flashes for a few seconds ... and turns off. On the small screen appears to me: 4WD system. Something is having this problem or can give me advice on where to start

 

Start with a scan tool and post the code(s).
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