EGR Vacuum Switching Valve (VSV): Notes

NOTE: When testing EGR VSV, use proper illustration to determine component location. See Fig 2-49. The EGR VSV may be referred to as the VSV.

Disconnect electrical connector from EGR VSV. Using ohmmeter, check resistance between EGR VSV electrical terminals.
Replace EGR VSV if resistance is not within specification. See EGR VSV RESISTANCE SPECIFICATIONS table. Ensure no continuity exists between each electrical terminal and EGR VSV body. Replace EGR VSV if continuity exists between any electrical terminal and VSV body.
Apply air pressure to port "E" (without battery connected). See Fig 1. Air pressure should flow from port "G". Connect battery voltage and ground to EGR VSV electrical terminals. See Fig 2. Apply air pressure to port "E". Air pressure should flow through the air filter. Replace EGR VSV if defective.

EGR VSV RESISTANCE SPECIFICATIONS

Application	Ohms
MR2	33-39

Fig 1: Testing EGR VSV Operation

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Fig 2: EGR System Diagram (Non-Turbo)

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Fig 3: EGR System Components (Non-Turbo)

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Fig 4: EGR System Operating Parameters (Non-Turbo)

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Fig 5: EGR System Diagram (Turbo)

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Fig 6: EGR System Components (Turbo)

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Fig 7: EGR System Operating Parameters (Turbo)

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Fig 8: Fuel Evaporation System Components (Non-Turbo)

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Fig 9: Fuel Evaporation Operating Parameters (Non-Turbo)

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Fig 10: Fuel Evaporation System Components (Turbo)

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Fig 11: Fuel Evaporation Operating Parameters (Turbo)

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NOTE: The EVAP Thermal Vacuum Valve (TVV) may be referred to as EVAP Thermal Valve (TV).