Contents: Examination ↓ Replacement ↓
Throttle Body Vacuum Test Table (1988-92.)
| Channel designation | At idle | Not idling |
| EGR | No vacuum | There is a vacuum |
| R | No vacuum | There is a vacuum |
Throttle Body Vacuum Test Chart (1993 and later)
| Channel designation | At idle | At 3500 rpm |
| P | No vacuum | There is a vacuum |
| E | No vacuum | There is a vacuum |
| R | No vacuum | There is a vacuum |
Examination
1. Make sure the throttle linkage operates smoothly.
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2. Start the engine, disconnect the vacuum hose and use a vacuum gauge to check the vacuum on each of the housing channels in accordance with the vacuum testing tables.
Replacement
Attention! Work is performed on a cold engine.
1. Disconnect the battery from ground.
2. Loosen the clamps and remove the air duct.
3. Disconnect the throttle actuator cable from the throttle actuator lever.
4. Remove the cable bracket and set it aside (there is no need to remove the cable from the bracket).
(The text is taken from the specified website: «ToyotaMan.ru»)
5. On vehicles with automatic transmission, disconnect the transmission choke cable from the linkage (see subsection 7.2.8), disconnect the cable brackets from the engine and move them to the side.
6. Identify and disconnect all vacuum and coolant hoses from the throttle body.
7. Disconnect the throttle angle sensor connector.
8. Remove the four throttle chamber mounting bolts.
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9. Remove the throttle body and gasket.
10. Using a soft brush and carburetor cleaner, thoroughly clean all cast surfaces of the housing, then blow out all passages with compressed air.
Caution! Do not wash the throttle angle sensor with any product. Wipe the sensor thoroughly with a clean, soft cloth.
11. Installation is carried out in reverse order.
12. Tighten the housing bolts and nuts to the specified torque.