Intake Air Control Valve Assembly (ES300)
With 7.9 in. Hg (26.7 kPa) of vacuum applied to actuator, ensure actuator rod moves. One minute after applying vacuum, check that actuator rod does not return. (Scheme 43) If operation is not as specified, replace intake air control valve assembly.
Scheme 43
Intake Air Control Valve Assembly No. 2 (ES300)
With 7.9 in. Hg (26.7 kPa) of vacuum applied to actuator, ensure actuator rod moves. One minute after applying vacuum, check that actuator rod does not return. (Scheme 44) If operation is not as specified, replace intake air control valve assembly No. 2.
Scheme 44
Intake Air Control Valve Assembly No. 3 (ES300)
With 7.9 in. Hg (26.7 kPa) of vacuum applied to actuator, ensure actuator rod moves. One minute after applying vacuum, check that actuator rod does not return. If operation is not as specified, replace intake air control valve assembly No. 3. Using an ohmmeter, check VSV operation. Resistance between VSV terminals should be 37-44 ohms at 68°F (20°C). Air should flow from port "E" to filter. Apply battery voltage between terminals. Air should flow from port "E" to port "F". (Scheme 45)
Scheme 45
Air Cleaner Cap Sub-Assembly (ES300)
Cover port "C" with finger, and check that air flows from port "B" to port "A". Cover port "C" with finger, and check that air does not flow from port "A" to port "B". Cover port "A" and "C" with fingers, and apply 18 in. Hg (60 kPa) of vacuum to port "B", and check that there is no change of vacuum after one minute. (Scheme 46)
Scheme 46
Vacuum Switching Valve Assembly No. 1 (ES300)
Using an ohmmeter, ensure 33-39 ohms are present between vacuum switching valve assembly No. 1 terminals at 68°F (20°C). Check that air flows from port "B" to filter. Apply battery voltage across terminals. Check that air flows from port "B" to port "A". (Scheme 47)
Scheme 47
Charcoal Canister Assembly (ES300)
- Visually check charcoal canister for cracks or damage. (Scheme 48) Check charcoal canister operation by plugging vent port with cap. (Scheme 49) While holding purge port closed, blow.26 psi (1.76 kPa) air into EVAP port ensure air flows from air drain port. While holding purge port and air drain port closed, blow.26 psi (1.76 kPa) air into EVAP port and ensure air does not flow from air inlet port. (Scheme 50) Apply 1.01 in. Hg (3.43 kPa) vacuum to purge port. (Scheme 51) Ensure vacuum does not decrease when air inlet port is closed, and check that vacuum decreases when air inlet port is released.
- While holding air inlet port closed, apply 1.01 in. Hg (3.43 kPa) to EVAP port and ensure vacuum air flows into purge port. (Scheme 52) If vacuum air does not flow into purge port, replace charcoal canister. If air does flow, go to next step.
- Check VSV for pressure switching valve. Using ohmmeter, resistance between VSV pressure switching valve terminals should be 37-44 ohms at 68°F (20°C), or 51-62 ohms at 248°F (120°C). (Scheme 53) If resistances are not to specification, replace VSV. If resistances are to specification, go to next step.
- Using ohmmeter, ensure there is no continuity between each terminal and VSV body. (Scheme 54) If continuity is present, replace VSV. If continuity is not present, check that air does not flow between ports "E" to "F". (Scheme 55) Apply battery voltage between VSV terminals. (Scheme 56) Air should flow between terminals "E" to "F". If VSV does not operate as specified, replace VSV.
Scheme 48
Scheme 49
Scheme 50
Scheme 51
Scheme 52
Scheme 53
Scheme 54
Scheme 55
Scheme 56
Scheme 57
Scheme 58
Scheme 59
Scheme 60
- Check VSV for EVAP with an ohmmeter connected between VSV terminals. (Scheme 57) Resistance should be 27-33 ohms at 68°F (20°C). If resistance is to specification, go to next step. If resistance is not to specification, replace VSV.
- Using ohmmeter, ensure there is no continuity between each terminal and VSV body. (Scheme 58) If continuity is present, replace VSV. If continuity is not present, check that air does not flow between ports "E" to "F". (Scheme 59) Apply battery voltage between VSV terminals. Air should flow between ports "E" to "F". (Scheme 60)