Checking the electrical connections of the ignition system

In the event of a malfunction of the ignition system, check all electrical connections, tightness of threaded connections, and the technical condition of the system elements. Check for 12V on both coils. Connect with this circuit «+» voltmeter to the red wire of the coil, «-» - on «mass». Turn on the ignition and read the voltmeter. Check the second ignition coil in the same way. If there is no voltage, check the fuse of the ignition relay, as well as the connectors of the coils and wires.

NOTE: Disconnect the ignition ECU before checking the continuity of the wires.

Make sure that the connectors are connected to the coils correctly: the black connector is to the coil of 1 and 4 cylinders, the red connector is to the coil of 2 and 3 cylinders.

ECU Precautions

It is forbidden to check the resistance of the computer, as the input test voltage can damage the computer. Disconnect the ECU connector before checking for an open in the ignition wires.

Checking the resistance of the primary winding of the ignition coil

Check the technical condition of the coil connector. Connect an ohmmeter between the coil leads (pic. 7.54).



The device should show no more than 1.6 kOhm. Check the second ignition coil.

Checking the resistance of the secondary winding of the ignition coil

Disconnect the high voltage wires from the spark plugs. Connect an ohmmeter between the high voltage leads of the coil (pic. 7.55).



The device should show 15 kOhm + 10%. Check the second ignition coil.

INSULATION CHECK OF IGNITION COILS
Connect an ohmmeter between the plastic coil housing and «weight». If the resistance value is less than 1 MΩ, replace the coil. To check the power supply of the computer, it is necessary to remove its connecting block and connect the tip «+» device to output «3» ECU pads, and the tip «-» to the conclusion «1» (pic. 7.56).



Switch on the ignition and make sure that the device shows 12 V. Otherwise, check the ignition timing.