romy_richter4
SupraIV electric seat malfunction
Summary of the thread
The passenger-side electric seat in a 2022 Toyota SupraIV was malfunctioning, showing an error code and failing to adjust. Initial thoughts about a battery issue were considered, but the battery seemed fine. Suggestions included checking the seat wiring harness and connectors for corrosion or damage, particularly focusing on the seat control module. Ultimately, a certified technician identified the problem as a discharged battery, replaced it, and cleared the error, resolving the issue.
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4 comment(s)
romy_richter4 (community.author)
I did a quick look at the accessible wiring, but I didn't use a multimeter to check continuity and voltage. Where did you see the most likely spots for failure on yours?
johanneswerner8
Mine was a corroded connector in the seat control module under the seat cushion. Without a full diagnostic, it's hard to say for sure. The electric seat system is complex, so a qualified tech might be best. I think I can confirm your suspicion.
romy_richter4 (community.author)
I took it to a certified technician as you suggested. The problem was related to the discharged battery. They replaced the battery, cleared the error, and the repair cost 290€.
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TOYOTA
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SUPRAIV
johanneswerner8
I had a similar problem with my SupraIV. Have you checked the seat wiring harness and connectors for corrosion or damage? A bad connection in the power seat circuit could cause those symptoms.