Idle Speed/Throttle Actuator - Mechanical: Testing and Inspection

Throttle Opener




INSPECTION
1. Start engine and let it idle.
2. Confirm the amount of the rod moves more than 1.65 mm (0.0650 in), the throttle drum becomes free from the rod of the throttle opener.
If NG, go to next step.
If OK, inspection is end.







3. Turn ignition switch "OFF".
4. Check vacuum source to throttle opener.
a. Check vacuum hose for disconnection or improper connection.
b. Remove vacuum hose connected to throttle opener.
c. Attach a vacuum gauge to vacuum hose, which is disconnected.
d. Start engine and let it idle.
e. Make sure that the vacuum is more than -40.0 kPa (-300 mmHg, -11.81 inHg).
f. Remove the vacuum gauge from intake manifold. If NG, go to next step.
If OK, go to step 7.
5. Check vacuum hose for clogging and cracks. If NG, replace or clean vacuum hose.
If OK, go to next step.
6. Blow air into the intake manifold and make sure air flows freely. If NG, replace or clean intake manifold.
If OK, go to next step.




7. Check throttle opener.
a. Connect suitable vacuum hose to vacuum pump as shown at left.
b. Apply vacuum [more than -40.0 kPa (-300 mmHg, -11.81 inHg) until the throttle drum becomes free from the rod of the throttle opener.
c. Confirm the amount of the rod moves more than 1.65 mm (0.0650 in), and also the throttle drum becomes free from the rod of the throttle opener.
If NG, go to next step.
8. Check visually for cracking and/or distortion of throttle opener and rod.
If NG, replace throttle opener.
If OK, install the vacuum hose and repeat from step 1 to 2.