Evaporative Emissions System: Testing and Inspection

Fig. 1 EVAP Emission Control (EEC) And Air Injection System:

Fig. 2 Relief Valve:

Fig. 3 Thermo Switch Installation:

1. Turn ignition on.
2. Disconnect electrical connector wire No. 157, from thermo switch, Figs. 1 thru 3.
3. Alternately touch the other thermo switch terminal wire No. M157, with the disconnected wire.
4. A clicking noise should be heard or felt coming from the thermo switch when touching the disconnected wire to the other thermo switch terminal.
5. Check hoses for correct routing and hose clamps for tightness. Replace deteriorated or damaged hose(s).