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System Test

WARNING: This page is about a different car, the 1990 Toyota Land Cruiser and 1989 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect air pump belt. Visually check hoses and tubes for cracks, kinks, damage, or loose connections. Disconnect air by-pass hose from Air Switching Valve (ASV). See Figure.
  2. With coolant temperature less than 50°F (10°C), start engine and set at idle. Air should discharge from ASV. When coolant temperature is between 59°F (15°C) and 95°F (35°C), air should stop discharging from ASV.
  3. When air stops discharging from ASV, increase engine speed to 3000 RPM. Air should again start discharging from AVS.
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