EGR Vacuum Switching Valve (VSV)
- Disconnect vacuum hoses and electrical connector from EGR VSV. EGR VSV is located on intake manifold, below air intake chamber and contains a Dark Blue 2-pin electrical connector. See Figure and Fig 1. It may be necessary to remove air intake chamber to access EGR VSV.
- Using ohmmeter, check that continuity exists between electrical terminals on EGR VSV and that resistance is within specification. See EGR VSV RESISTANCE table. Replace EGR VSV if no continuity exists or resistance is not within specification.
- Using ohmmeter, ensure no continuity exists between each electrical terminal and body of the EGR VSV. Replace EGR VSV if continuity exists between any electrical terminal and body of EGR VSV.
- To test EGR VSV operation, apply air pressure to port "G". Ensure air flows from port "E". Perform STEP 1. See Fig 2. Apply battery voltage and ground to electrical terminals on EGR VSV. Apply air pressure to port "G". Ensure air does not flow from port "E". Perform STEP 2. See Fig 2. Replace EGR VSV if defective.
EGR VSV RESISTANCE
| Application | Ohms @ 68°F (20°C) |
|---|---|
| LX 450/Land Cruiser | 30-34 |