Idle Speed: 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 accessories switched OFF
e. All vacuum lines properly connected

HINT: All vacuum hoses should be properly connected.

f. SFI system wiring connectors fully plugged
g. Ignition timing set correctly
h. Transmission in neutral position
i. Air conditioning switched OFF
2. CONNECT LEXUS HAND-HELD TESTER OR OBDII SCAN TOOL
3. INSPECT IDLE SPEED
a. Race the engine speed at 2,500 rpm for approx. 90 seconds.
b. Check the idle speed.
Idle speed: 750 ± 50 rpm
If the idle speed is not as specified, check the air intake system.
4. DISCONNECT LEXUS HAND-HELD TESTER OR OBDII SCAN TOOL