Off-Vehicle Inspection

THROTTLE BODY REMOVAL
1. DRAIN ENGINE COOLANT
2. DISCONNECT ACCELERATOR CABLE
3. DISCONNECT THROTTLE CABLE
4. REMOVE AIR CLEANER HOSE
- Disconnect the PCV hose.



- Loosen the 2 hose clamps, and remove the air cleaner hose.

5. REMOVE THROTTLE BODY
- Disconnect the throttle position sensor connector.
- Disconnect the IAC valve connector.
- Remove the hose clamp
- Disconnect these vacuum hoses:



(1) EVAP hose (from charcoal canister)
(2) Vacuum hose (from port R of EGR vacuum modulator)
(3) Vacuum hose (from port E of EGR vacuum modulator)
(4) EVAP hose (from upper port of TVV)
(5) EVAP hose (from lower port of TVV)

- Disconnect these hoses:



(1) Water bypass hose (from intake manifold)
(2) Water bypass hose (from water inlet housing)
(3) Air assist hose




- Remove the 2 bolts, 2 nuts, EGR gas temperature sensor bracket, throttle body and gasket.
INSTALLATION HINT: Place a new gasket on the air intake chamber.

Torque: 19.5 Nm (200 kgf.cm, 14 ft.lb)


THROTTLE BODY INSPECTION
1. CLEAN THROTTLE BODY
- Using a soft brush and carburetor cleaner, clean the cast parts.



- Using compressed air, clean all the passages and apertures.

NOTICE: To prevent deterioration, do not clean the throttle position sensor.

2. INSPECT THROTTLE VALVE



- Apply vacuum to the throttle opener.
- Check that there is no clearance between the throttle stop screw and throttle lever when the throttle valve is fully closed.

3. INSPECT THROTTLE POSITION SENSOR



- Apply vacuum to the throttle opener.
- Insert a feeler gauge between the throttle stop screw and stop lever.



- Using an ohmmeter, measure the resistance between each terminal.





4. IF NECESSARY, ADJUST THROTTLE POSITION SENSOR



- Loosen the 2 set screws of the sensor.



- Apply vacuum to the throttle opener.
- Insert a 0.54 mm (0.021 in.) feeler gauge, between the throttle stop screw and stop lever.
- Connect the test probe of an ohmmeter to the terminals IDL and E2 of the sensor.
- Gradually turn the sensor clockwise until the ohmmeter deflects, and secure it with the 2 set screws.







- Recheck the continuity between terminals IDL and E2.