Title: Inspect the selective catalyst reduction (SCR) system.
Course: Diesel Equipment Technology I (20107-I) > Section: Preventive Maintenance and Inspection: Servicing the Air Induction and Exhaust System

Inspection should include checking the DEF for correct levels, leaks, mounting, and connection.

ASE 3: I. Diesel Engines: I. Emission Controls (P-2)

Process/Skill Questions:

- What part does DEF play in the SCR system?
- What are common issues with an SCR system?