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Volkswagen Santana engine flameout hold off
— by kobd2 kobd2
Mileage of about 184,000 km, equipped BKU engine 2004 Volkswagen Santana. The car off the ignition change, the motor can't promptly iobd2 xtool turn off, wait around about 1 min in advance of flameout.

Troubleshooting: exam uncovered, flip the ignition switch, gas pump continues to be operating; from the ignition swap, the gasoline pump remains to be doing work, infer energy lines or fuel pump manage circuit is defective. Check the gas pump supply line, anything is normal; check out the gasoline pump relay (J17) regulate line, identified which the command circuit from the control unit that's connected to the engine (J220) Terminal Floor line T121 / 65's, but was artificially directly with system relationship.

device terminal T121 / 65 After the test, disconnect iobd2 the ignition swap, convert off the motor promptly.

Failure Examination: engine operating circumstances will not be confined to oil gasoline pump, ignition systems also have to have to participate while in the do the job, so in such cases, disconnect the ignition swap, ignition program why can keep on to work? Seen because of the motor vehicle engine handle circuit, ignition coils and gas pump relay ability regulate circuit electric power source by the power offer relay (J271) management. Discovered elm327 bluetooth by measuring, flip the ignition switch, electrical power relay with 12V output voltage on its terminals 6/87, ignition coil, fuel pump relay and other get-powered; off the ignition switch, the ability supply won't be disconnected instantly relay contacts but wait around about one min following the disconnection, that is definitely, following the ignition swap is turned off, the power source ignition coils and gas pump relay to receive on and will not vanish immediately. Below typical circumstances that, disconnect the ignition swap, the engine would be to right away turn off it? The creator concluded that, in from the ignition change, even though the power relay hold off for around 1 min, but the gasoline pump relay will quickly stop functioning.

To verify the facility relay mini zedbull and gas pump relay 2 control coil loop in the managed condition on the motor command device internal multimeter sequence respectively in this particular two command coil circuit. Get started the motor, two command coils are present loop exists; from the ignition change, power relay management coil latest loop nevertheless exists, disappears just after about one min, along with the gas pump relay command coil existing within the loop together with the ignition swap the disconnection will immediately disappear.