vincentlang69
Lexus GS Electrical Error and Navigation Failure
Summary of the thread
A 2019 Lexus GS with 151,100 km was experiencing a general electrical malfunction and a dead navigation system, with an error stored in the onboard diagnostics. The issue was suspected to be related to the programming of the control unit. After checking the battery and alternator, which were functioning correctly, it was determined that the ECU might be the problem. The solution involved re-flashing the ECU at a workshop, which resolved the issues.
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4 comment(s)
vincentlang69 (community.author)
Battery voltage seems fine, and the alternator is charging correctly. I'm leaning more towards the ECU itself. Any experience with similar Lexus ECU problems specifically? I'm wondering if a software refresh might resolve this.
ralfblaze8
Ah, ECU problems are a pain. I haven't had that issue on a Lexus myself, but my friend had similar problems with his BMW. Turned out the dealer had to reprogram the control unit. If the battery and alternator are good, it's probably best to get it checked at a workshop before you do any further damage.
vincentlang69 (community.author)
Thanks for the input. Took it to the workshop as suggested. Turns out the programming of the control unit was indeed implausible. They re-flashed the ECU; total cost was 240€. Everything seems to be working fine now.
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LEXUS
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GS
ralfblaze8
Electrical malfunction alongside a nav system failure sounds serious. Have you checked the battery and alternator? A weak battery can cause all sorts of weird electronic issues in modern cars. Had similar problems with my old Mazda after the battery started failing.