HD20 - Check Vacuum System

- Visually inspect all vacuum lines for damage, such as pinched lines, cracks, proper routing and assembly.

NOTE: Some vacuum leaks can be found audibly.

- Is the vehicle vacuum system OK?

YES -- GO to HD21. HD21 - Check Evaporative Emission System

NO -- SERVICE the vacuum system. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes