Air Injection System
- Check all hoses and connections. Disconnect air by-pass hose from air cleaner. If vehicle is equipped with HAC system, disconnect vacuum hose from lower port of HAC valve, and plug hose end.
- Check EACV with engine cold. With coolant temperature below 43°F (6°C), start engine and check that air is discharged from air by-pass hose. See Fig 2.
- Check EACV with engine warm including thermo switch (1) and (2) to EACV. Warm up engine to between 64-109°F (18-43°C). With engine idling, check that air is not discharged from air by-pass hose (Man. Trans. only).
- Check EACV including oxygen sensor to EACV. Warm up engine to normal operating temperature. Maintain engine speed at 2000 RPM. Check that air is discharged intermittently from air by-pass hose.
- Check VCS, race engine and quickly close throttle valve. Check that air is discharged momentarily from air by-pass hose. See Fig 2.
- Check TWC thermo sensor to EACV. With engine idling, connect a wire to TWC terminal and terminal E of service connector, which is located on right fender apron behind battery.
- Check that intermittent air from air by-pass hose changes to a continuous discharge. Disconnect wire from service connector.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002