- a) Check the smooth operation of the damper drive.
3S-FE, 3S-GE, 4S-FE | 
4A-FE, 7A-FE |
5E-FE
- 6) Check for vacuum in the channels with the engine running by placing your finger on them while the engine is running and warm.
3S-FE, 4S-FE, 5E-FE | 
3S-GE |
| Port | At idle | Except idling |
| P | no rarefactions | underpressure |
| E | no vacuum | underpressure |
| R | no vacuum | no vacuum |
- c) Turn off the engine.
2. Check the throttle position sensor.
- a) Disconnect the throttle position sensor connector.
- b) (Models with throttle damper) Disconnect the vacuum hose from the throttle actuator mechanism and apply vacuum to the mechanism.
- c) Insert a flat feeler gauge with a thickness of 0.50 or 0.70 mm (3S-FE, 3S-GE, 4S-FE, 5E-FE); 0.40 or 0.90 mm (4A-FE, 7A-FE) between the throttle stop adjusting screw and the lever.
- d) Using an ohmmeter, measure the resistance between the corresponding terminals of the sensor connector at different throttle positions (see table).
| Clearance between lever and screw, mm | Conclusions | Resistance, kOhm |
| 0 | VTA-E2 | 0,2-0,8 (7A-FE) 3,5 |
| 0 | IDL-E2 | infinity |
| 0,5 | IDL-E2 | 2.3 or less |
| 0,7 | IDL-E2 | infinity |
| The throttle valve is fully open | VTA-E2 | (3S-FE, 3S-GE, 4A-FE, 4S-FE, 5E-FE) 2,0-10.2 (7A-FE) 0,95 |
| - | VC-E2 | 2,5-8,5 |
If the resistance value is outside the specified values, adjust or replace the throttle position sensor.
- e) (Models with throttle opening mechanism) Connect the sensor connector.
- 3. (Models with throttle damper) Check the operation of the throttle valve opening mechanism.
- c) Start and warm up the engine to normal operating temperature.
- b) Connect the tachometer (see page 23).
- c) Check the idle speed. Idle speed: 700+50 rpm.
- d) Disconnect the vacuum hose from the throttle actuator and plug its end.
- d) Maintain the rotation speed at about 2500 rpm.
- e) Release the throttle valve
- g) Make sure that the engine speed (set by the throttle valve opening mechanism) lies within the range of 1200-1800 rpm (with the cooling system fan off) Otherwise, adjust the throttle opening mechanism.
- c) Adjust the rotation speed set by the throttle valve opening mechanism by turning the adjusting screw of the mechanism.
Nominal speed (with the cooling system fan off): 1400 rpm.
- i) Reconnect the vacuum hose.
- 4. Disconnect the tachometer.
- 5 (5E-FE) Check the operation of the pneumatic valve.
- a) Make sure that air flows from "B" to "A" without resistance.
- b) Make sure that air passes with difficulty from "A" to "B".
If a fault is detected, replace the pneumatic valve.
(The official source is on the portal: ToyotaMan.ru)
Note: Do not confuse the connection location of the solenoid valve.