1. When the engine is cold (temperature below 35°C) and equipped with this system, there is a short-term (lasts 0.4 s) enrichment of the mixture so that plugging does not occur during acceleration. This short-term enrichment system is only active when the temporary thermal switch and pressure throttle switch are off.
2. Before starting to check the system, you must first check whether the cold start valve is in good condition.
3. Disconnect the electrical connection plug from the cold start valve and connect a test light to its ends.
4. Disconnect the plug of the electrical connection from the temporary thermal switch and connect the ground with a wire of the appropriate length to the connection contact W (wire green-white). Compound g (red-black wire) cannot be connected to ground.
5. Start the engine and leave it to idle, the test light should not be on constantly, but should light up for a short time (0.4 seconds) when opening the throttle quickly.
6. If it appears that there is any damage in the system, check the wiring connections, throttle switch and diaphragm pressure switch.
7. Diaphragm pressure switch can be checked with a thermometer. Disconnect the disconnect wire plug at the end of the diaphragm pressure switch, then start the engine at idle. Using a thermometer, check the resistance between the contacts. The ohm meter should show infinite resistance.
8. After that, you must slowly open the throttle to the position at which you can hear the action of the switch (crackling should be heard). The ohm meter should show 0 ohms, and the gap between the throttle lever and the idle speed limiter should be 0 2-0.6 mm. Measure with a probe.
9. If necessary, adjust the switch by loosening it from below the throttle body and placing a 0.4 mm feeler gauge between the lever and stop. Move the switch towards the switch lever, then press it to check the adjustment.
10. If the throttle switch is adjusted, lift the connection bracket to release it.
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