Off Vehicle Inspection

- 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 and dash pot.

2. INSPECT THROTTLE VALVE AND THROTTLE POSITION SENSOR.
- Inspect throttle valve

- Disconnect the throttle opener vacuum hose from the throttle body.
- 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.
- Reconnect the throttle opener vacuum hose to the throttle body.
- Inspect throttle position sensor

- If necessary, adjust throttle position sensor

- Loosen the 2 set screws of the sensor.

- Insert a 0.50 mm (0.020 in.) feeler gauge, between the throttle stop screw and stop lever.
- Connect the test probe of an ohmmeter to the terminals IDL1 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 IDL1 and E2.
3. w/TRAC:
INSPECT SUB-THROTTLE ACTUATOR,
SUB-THROTTLE VALVE AND SUB-THROTTLE POSITION SENSOR.

- Inspect sub-throttle actuator
- Using an ohmmeter, measure the resistance between the terminals (ACM A and A-, BCM B and B-).

Resistance: At 20°C (68°F): 0.5 - 1.0 Ohms

- If the resistance is not as specified, replace the actuator valve.

- Inspect sub-throttle actuator
- Remove the 3 screws and sub-throttle actuator.

- Inspect sub-throttle valve
- Check that there is no clearance between the throttle stop screw and throttle valve gear when the sub- throttle valve is fully closed.

- Inspect sub-throttle position sensor
- Insert a 0.30 mm (0.012 in.) or 0.50 mm (0.020 in.) feeler gauge between the throttle stop screw and throttle valve gear.

- Using an ohmmeter, measure the resistance between terminals.
- If necessary, adjust sub-throttle position sensor

- Loosen the 2 set screws of the sensor.

- Insert a 0.40 mm (0.016 in.) feeler gauge, between the throttle stop screw and throttle valve gear.
- Connect the test probe of an ohmmeter to the terminals IDL2 and E2 of the sensor.

- Set that the sub-throttle valve is fully closed.
- Gradually turn the sensor clockwise until the ohmmeter deflects, and secure it with the 2 set screws.

- Recheck the continuity between terminals IDL2 and E2.
- Reinstall sub - throttle actuator
- Install the sub-throttle actuator with the 4 screws.