If simulation function of WDS or equivalent is not used:

Start the engine.
Disconnect the vacuum hose between the purge solenoid valve and the charcoal canister.
Put the finger to the purge solenoid valve and verify that there is no vacuum applied when the engine is cold.
- If there is a vacuum, inspect the following:
  - Wiring harness and connectors (Purge solenoid valve-PCM terminal 2C)
  - Purge solenoid vale (stuck open)
Connect the WDS or equivalent to the DLC-2 and verify that the DTC P0443 is shown. Perform the DTC inspection.
(See DTC TABLE .)
Access EVAPCP and ECT PIDs.
Verify that the ECT PID is more than 78°C {173°F}.
- If the ECT PID reading indicates less than 78°C {173°F} , perform the ECT inspection.
Set the vehicle on the dynamometer or chassis roller.
WARNING:
- When the dynamometer or chassis roller is operating, there is a possibility that the operator may come into contact with or be caught up in the rotating parts, leading to serious injuries or death. When performing work while the dynamometer or chassis roller is operating, be careful not to come into contact with or caught up in any of the rotating parts.
Drive the vehicle approx. 2,000 rpm for 30 sec. or more.
- If there is no vacuum, inspect the following:
  - Wiring harness and connector (Main relay-purge solenoid valve-PCM terminal 2C)
  - Purge solenoid valve
  - MAF, APP1, APP2, TP and LOAD PISs
- If there is vacuum, inspect the following:
  - Vacuum hose (Purge solenoid valve-charcoal canister)