Toyota error code C1241
Power supply voltage out of range. INF 81 = ignition below 7.9 V for 5 s above 3 km/h; INF 82 = above 17.8 V for 5 s.
What to check, and in what order, is in the app. The flow Toyota - three complaints, three different systems walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- Trailer Detection Field Manual Rev. 1.0 + Engineering Supplement Rev. BIn-house (shop technical reference)
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