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This concern is not consistent with fuel pump relay failure. If the fuel pump relay was shorted in a way that powered the fuel pump at all times, the fuel pump would continue to operate but it wouldn't cause the engine to keep running. In order for the engine to keep running, the powertrain control module (PCM) would still need to be powered (along with various input sensors to it) so that it could command fuel injectors to open and ignition coils to fire. In other words, many other parts would need to remain powered-up as well in order to keep the engine running. This prompts the question, "Which component controls when these parts are powered and when they're not?" The answer is the ignition switch. The ignition switch is an electrical switch located on the end of the ignition lock cylinder where the key is inserted. When the key is turned to a certain position, contacts in the switch take power from the battery and apply it to certain circuits associated with that particular switch position. When the switch is turned to the OFF position, power is removed from the systems that keep the engine running. Therefore, I would suspect a failed ignition switch at this time. You can read more here: https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-ignition-switch
Most likely the ignition switch or the rod in the steering column is sticking and keeping the switch engaged, possibly the ignition lock cylinder is sticky too. Easy to get lock cylinder out with a small punch that depresses a pin when the lock cylinder is in the run position, look under the steering column by the switch for a hole to poke the punch into and then pull out the lock cylinder.
SEQUENCE ACTIVATED BY THE PARKING BRAKE . 1. While engine is running (key in ignition switch), apply the brakes and hold the pedal down. 2. Move gearshift lever to neutral. 3. Apply the parking brake Once Twice Note: The system can be set - at time of installation - to require that the parking brake be applied once or twice. If set for two actuations, pause one second between the two. 4. Remove key from ignition (the system keeps the engine running). 5. Exit the vehicle. 6. Within 60 seconds, close all doors. 7. The system will stop the engine and blink the parking brakes once to confirm the sequence is valid (vehicle is ready for a remote start command). SEQUENCE ACTIVATED BY THE REMOTE CONTROL 1. While engine is running (key in ignition switch), apply the brakes and hold the pedal down. 2. Move gearshift lever to neutral. 3. Apply parking brake. 4. Send the start command (Model 801 & 2101 - Model 903 ). 5. Remove key from ignition (the system keeps the engine running). 6. Exit the vehicle. 7. Using the remote, send the STOP command. The system will stop the engine and parking lights will blink once to confirm that the sequence is valid (vehicle is ready for a remote start command). http://www.astrostart.com/Support/Guides.aspx
ok well this is where you might be incorrect... either you have a 12 volt wire bleeding scross or you have a bad ignition switch. the run wire off the ignition switch is the only thing that will keep it running unless you have a remote start then of course that could keep the engine running. you might want to start by making sure the ignition switch is beaking the signal to the PCM.
i have the same problem with my corolla 2002 I turn off the keys and put it out and the engine still running, I uplug the EFI fuse and the engine stop, I guess I need to replace the ignition.. or i'm wrong???
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