To flush the throttle assembly, you will need a product to clean the engine intake manifold. As a last resort, you can use a carburetor cleaner. If the cleaner fails to eliminate the malfunction, the throttle assembly must be replaced. After removing the throttle assembly, the gasket (sealing ring) needs to be replaced. You may need a product to clean and protect electrical contacts.
Warning: To avoid damaging the electric drive, do not attempt to force the throttle valve to turn.
To perform the test you will need a multimeter.
Note: When installing a new throttle assembly on a vehicle, special diagnostic equipment will be required to check the "calibration" of the throttle position in extreme positions. This operation can be performed at a specialized service station.
Sequence of execution
1. Prepare the car for work and disconnect the wire terminal from the negative terminal of the battery ("Preparing the car for maintenance and repair").
2. Using a Phillips screwdriver, loosen the clamp and disconnect the air supply hose from the throttle assembly pipe and move the hose downwards.
3. Press the clamps to disconnect the wiring harness connector from the throttle assembly.
4. Visually check the condition of the throttle body terminals and the wiring harness block. To remove oxides, spray the terminals with a cleaning and protection agent for electrical contacts.
5. Using a 5 mm Allen key, unscrew the four throttle assembly mounting bolts (one of the bolts is not visible in the photo).
6. Remove the throttle assembly.
7. Remove the sealing ring from the intake manifold receiver flange.
8. Using a multimeter in ohmmeter mode, measure the resistance of the throttle position sensors between terminals 1 and 4. A serviceable throttle assembly should have a resistance of 750-1250 Ohms.
Warning! When performing the following operation, hold the throttle assembly with the electric drive upwards so that the cleaning agent cannot flow down the throttle shaft towards the gear motor and get inside the mechanism.
9. Using a cleaning agent, wash away deposits from the inner walls of the throttle assembly and from the throttle valve.
10. Wipe the throttle assembly with a clean cloth and blow it with compressed air from a compressor or foot pump.
11. Install the throttle assembly in the reverse order, replacing the sealing ring with a new one.
Apply anaerobic thread locker to the threaded portion of the throttle assembly mounting bolts. Tighten the bolts to a torque of 8-12 Nm.
Note: After the ignition is turned on, the throttle assembly must perform a full cycle of checking both the maximum and minimum throttle opening angles. When installing a new throttle assembly, it is necessary to check the throttle position reprogramming using special diagnostic equipment. The same procedure will be required after replacing the electronic control unit (ECU). It can be performed at a specialized service station with the necessary equipment.
Table 8.2.4. Throttle Assembly Pin Assignments
| Output number | Electrical circuit of the throttle assembly | Purpose of the output |
| 1 | Throttle Position Sensors | "Weight" |
| 2 | Signal from sensor #1 | |
| 3 | Signal from sensor #2 | |
| 4 | Supply voltage | |
| 5 | Throttle actuator motor-reducer | Motor winding output* |
| 6 | Motor winding output* |
* The polarity of the supply voltage supplied to the electric motor changes depending on which direction the throttle valve needs to be turned.