Emission Control Systems: Testing and Inspection

INSPECTION
1. INITIAL CONDITIONS.
a. Engine at normal operating temperature
b. Air cleaner installed
c. All pipes and hoses of air induction system connected
d. All vacuum lines properly connected
e. Sequential Multiport Fuel Injection (SFI) system wiring connectors fully plugged
f. All operating accessories switched OFF
g. Ignition timing check correctly
h. Transmission in neutral position
i. Air conditioning switched OFF
2. CONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL.
3. INSPECT IDLE SPEED.
a. Race the engine speed at 2,500 rpm for approximately 90 seconds.
b. Check the idle speed.

Idle speed (w/ Cooling fan OFF): 750 ± 50 rpm

If the idle speed is not as specified, check the Idle Air Control (IAC) valve and air intake system.
4. DISCONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL.