supply voltage detection ignition coil (Dieselpartsworld) 2016-02-28    

Maintenance of the lack of engine cylinders caused by idling
2) supply voltage detection ignition coil
From the ignition coil and pull the plug, open the ignition switch, retaining power measuring terminal "C" and body grounding power supply voltage with Multimeter voltage, the normal value should be higher than 11.5V battery voltage. If the supply voltage is too low or zero, should check the ignition coil to power line has no circuit, by segment detection, the wire resistance should be less than 1.5.
3) detection engine computer control function for ignition coil
Fuel first unplug the central circuit board, the fuel pump to stop working.
Again from the ignition coil and pull the plug, open the ignition switch, using a voltmeter measurement block between the ignition coil control signal terminal "a" and body grounding voltage, the normal value is about 5V. If the test voltage is too low or zero, should check the ignition coil to the line between the computer has no circuit. If the test voltage is too high, with the engine computer related detection, replace if necessary.
Measuring wire harness ground ignition coil. Select the multimeter buzzer gear, resistance and ground state of terminal "measurement of the ignition coil B and the earth body. The good earth, there should be a buzzing sound, display the resistance value should be less than 1. If the poor ground, should check the wiring harness.
Then test the engine computer can send the primary winding of the power down signal, remove the ignition coil plug, with one end of the lamp contact signal terminal "a", on the other end of the grounding, starting the engine.
If the LED flashes, indicating ignition engine control computer function, testing is completed, switch off the ignition.
If you do not blink, check the engine computer to the engine ignition coil circuit and computer. If the power supply is normal, the light emitting diode and normal flashing, you need to detect the resistance of the ignition coil, if not meet the requirements should replace the ignition coil.