On-Vehicle Inspection

ON-VEHICLE INSPECTION

1. INSPECT THROTTLE BODY





(a) Check that the throttle linkage moves smoothly





(b) Check the vacuum at each port.
- Start the engine.





- Check the vacuum with your finger.
2. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the throttle position sensor connector.
(b) Disconnect the throttle opener vacuum hose from the throttle body.





(c) Apply vacuum to the throttle opener.
(d) Insert a feeler gauge between the throttle stop screw and stop lever.

Ohmmeter Connection:

Reference:

(e) Using an ohmmeter. measure the resistance between each terminal.
(f) Reconnect the throttle opener vacuum hose to the throttle body.
(g) Reconnect the throttle position sensor connector.
3. INSPECT AND ADJUST THROTTLE OPENER
A. Warm up engine
Allow the engine to warm up to normal operating temperature.
B. Check idle speed

Idle speed: 650 - 750 rpm

C. Check and adjust throttle opener setting speed

Reference:

(a) Disconnect the vacuum hose from the throttle opener, and plug the hose end.
(b) Maintain the engine at 2,500 rpm.
(c) Release the throttle valve.
(d) Check that the throttle opener is set.

Throttle opener setting speed: 1.300 - 1.500 rpm (w/ cooling fan OFF)





(e) Adjust the throttle opener setting speed by turning the throttle opener adjusting screw.
(f) Reconnect the vacuum hose to the throttle opener.
D. Disconnect TOYOTA hand-held tester or OBD II scan tool