TechnicianVision · Knowledge base
What’s In A Steering Column: Energy Absorbing Column
I-CAR · December 16, 2019
Summary
This article explains the evolution and function of energy-absorbing, collapsible steering columns, which are designed to shorten during a collision to absorb impact forces. It highlights that modern columns may use mechanical shear pins, deforming metal, or pyrotechnic release devices, and emphasizes that vehicle makers require specific post-collision inspections, measurements, or mandatory replacement.
What to do on the job
Always consult the OEM service manual for specific steering column inspection, measurement, or replacement procedures, and perform a diagnostic scan to check for computer-controlled steering column DTCs.
How to use it
Use this document to justify the labor time required for performing steering column inspections, measurements, and diagnostic scanning following any collision where airbag deployment or driver impact occurred. It helps defend the necessity of replacing the steering column if OEM guidelines indicate the energy-absorbing mechanisms are one-time-use or have been deployed.
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