Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1997 Toyota Land CruiserFACTORY OEM SERVICE PROCEDURE
Fuel Pressure Control System
- Fuel pressure control system uses a fuel pressure control Vacuum Switching Valve (VSV). Fuel pressure control VSV is supplied voltage through EFI main relay.
- The Engine Control Module (ECM) will activate VSV by controlling ground circuit for approximately 90-180 seconds when restarting engine at normal operating temperature. Locate and remove fuel pressure control VSV. See FUEL PRESSURE CONTROL VSV LOCATION table. See Fig 1.NOTE: Fuel pressure control VSV may also be identified by using proper wire color. See appropriate wiring diagram in WIRING DIAGRAMS article.FUEL PRESSURE CONTROL VSV LOCATION
Application Location LX 450/Land Cruiser Below Air Intake Chamber At Front Lower Side Of Intake Manifold, Near Dipstick & Contains Brown 2-Pin Electrical Connector - Using ohmmeter, ensure continuity exists between electrical terminals on fuel pressure control VSV and resistance is within specification. See FUEL PRESSURE CONTROL VSV RESISTANCE table. Replace fuel pressure control VSV if no continuity exists or resistance is not within specification.
- Ensure no continuity exists between each electrical terminal and body of fuel pressure control VSV. Replace fuel pressure control VSV if continuity exists between electrical terminal and body of fuel pressure control VSV.
- To test fuel pressure control VSV operation, apply air pressure to port "E". Ensure air flows from port "G" and not from the filter. Perform STEP 1. See Fig 2.
- Apply battery voltage and ground to electrical terminals on fuel pressure control VSV. Apply air pressure to port "E". Ensure air flows from filter and not from port "G". Perform STEP 2. See Fig 2. Replace fuel pressure control VSV if defective.
FUEL PRESSURE CONTROL VSV RESISTANCE
| Application | Ohms @ 68°F (20°C) |
|---|---|
| LX 450/Land Cruiser | 37-44 |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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