Urgent help with UNS S10 2005 2.4 gasoline

You should scan the truck, and it should give you the fault code and description. You can also check if they've installed a kill switch or engine immobilizer in the alarm, ignition switch, or fuses. On that model, look for the OBDII connector on the dashboard below the steering wheel. With the ignition on, bridge pins 5 and 6 of that connector, and the check engine light will start flashing. First, it will flash once, followed by twice. That's code 12, the initial communication with the ECU. Then it will repeat this two more times. After the third repetition, it will start displaying new codes. Write them down so you know what they mean. To clear the codes after the repairs, you must disconnect the electronic fuel injection (EFI) fuse for 20 seconds

Czech if pulse comes to the coil, that is, positive current and pulse, to start ruling out. If blocked you will have to scan it