TechnicianVision · Knowledge base
Non-SRS Wiring Repairs: Toyota/Lexus
I-CAR · February 1, 2022 · Toyota, Lexus
Summary
This article outlines the guidelines and resources for performing non-SRS wiring repairs on Toyota and Lexus vehicles. It highlights how to access official wiring diagrams and repair documents, while emphasizing that certain components, such as shielded wiring, must never be repaired and require full harness replacement.
What to do on the job
Access the Electrical Wiring Diagram (EWD) tab on the Toyota Technical Information System (TIS) to verify if the specific wire damage is repairable, and never attempt to repair shielded wiring.
How to use it
Use this document to justify the replacement of a wiring harness when shielded wiring is damaged, as Toyota explicitly states its performance cannot be guaranteed after a repair. It can also be used to add labor time for mandatory post-repair circuit testing and to source official repair guidelines from TIS during the blueprinting phase.
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