Initial Inspection and Diagnostic Overview

NOTE: Prior to inspecting the system, be sure to START and RUN the engine at idle until operating temperature is reached.


1. Visually inspect the components of the Evaporative Emission System. Look for:
^ Discharged Battery
^ Loose Or Damaged Harness Connectors And Wire
^ Insulation
^ Inoperative Solenoids
^ Fuel Odor or Leakage
^ Damaged Vacuum or Fuel Vapor Hoses and Lines
^ Loose Hose and Line Connections
^ Damaged Air Flow Meter


2. Exercise the wiring and connectors for the solenoids, vane air flow meter, speed sensor, and the ECA. Check for looseness, corrosion, and any other damage.
3. Check the fuel tanks, fuel vapor lines, vacuum lines, and connections for looseness, pinching, leakage, or other obvious causes for malfunction.
4. If fuel line, vacuum line, or orifice blockage is suspected as the obvious cause of an observed malfunction, correct the cause before proceeding to the next step.
5. If the malfunction is not detected during the visual inspection, proceed with the following Evaporative Emission Control component tests.