(3) Unstable idle speed
No. Problem Causes Actions
Air leakage Fasten throttle valve body mounting screw.
Failed idle control valve Repair or replace the throttle valve body
Failed throttle position
sensor
Check throttle opening. Check if throttle position
sensor operating parameter within specification.
Check if throttle cable installed correctly.
Move throttle and check if throttle stuch.
Check throttle opening (angle is within 0~0.6 at
throttle is closed)
1
throttle
valve
body
Abnormal throttle
opening
If throttle angle is correct, check if throttle position
sensor connector contact is good.
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