HD22 - Pressure Test Evaporative System

- Remove vapor line at canister.

- Install a TEE in the line.

- Install a pressure gauge to one side of TEE.

- Supply air to the other side of TEE, up to a maximum of 0.75 psi.

- Is evaporative emission system holding pressure?

YES -- RECONNECT canister line, GO to HD23. HD23 - Check Vacuum In Evaporative System

NO -- SERVICE as necessary. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes