2. Connect the negative probe of the device to pin 2 of the connector of the ignition distributor, and the positive probe to pin 4 of the connector (pic. 9.2).
Pic. 9.2. Checking the power transistor (MPI)
Warning. This check must be completed within 10 seconds, otherwise the ignition coil winding may burn out and the power transistor may be damaged.
3. Connect the positive pole of the 1.5 V power supply to pin 3 of the ignition distributor connector, and the negative pole of the power source to pin 4 of the connector, while the device should show the flow of current, and when the power source is disconnected, the device should not show the flow of current (see fig. 9.2)
4. If the test results are not positive, replace the power transistor.