Celica, Corona & Pickup

Warm up engine so coolant temperature is between 64-109°F (18-43°C). Disconnect and plug vacuum hose at check valve located between VSV 1 and vacuum pipe. Check that air is not discharged from air by-pass hose.

Fig 1: Land Cruiser Air Injection System
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Tercel Air Injection System
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Warm up engine to normal operating temperature. Set engine speed at 2000 RPM. Check that air is discharged intermittently from air by-pass hose. Race engine and quickly close throttle. Air should discharge briefly from air by-pass hose.
Run engine at idle. Locate service connector at left fender panel near ignition coil on Celica and Corona models or corner of left dash panel on Pickup models.
Connect a wire from "TWC" terminal to "E" terminal. Check that air is discharged intermittently from air by-pass hose. Disconnect wire.
Stop engine and reconnect all hoses. If system performed correctly, testing is complete. If not, check individual components as necessary.