When performing CTIS inspection, which action is essential?

• A. Replacing tires with mismatched sizes
• B. Inspecting components for leaks and proper operation
• C. Disabling the system during high-speed driving
• D. Ignoring warning indicators

Answer: (B)

During a CTIS inspection, the key task is to verify the system's integrity by inspecting all CTIS components for leaks and ensuring they operate properly. The Central Tire Inflation System relies on a network of air lines, valves, a compressor, and wheel-mounted components to adjust tire pressure as needed. If any part leaks or the valves or compressor aren’t functioning, the system can’t reliably reach or hold the correct pressures, which can compromise traction, vehicle handling, and tire life.

In practice, you’d look for any signs of air leaks, damaged hoses or fittings, loose connections, and worn seals. You’d also confirm that the compressor, control valves, and wheel-end sensors respond correctly when the system is commanded to inflate or deflate, and that warning indicators behave as expected. Addressing leaks and verifying proper operation ensures the CTIS can accurately and safely manage tire pressures in the field.

Replacing tires with mismatched sizes isn’t part of the inspection, and disabling the system during high-speed driving or ignoring warning indicators would undermine safety and performance.