Ignition system troubleshooting diagram, voltage testing
| The element being tested | Test method | Set value | Cause of malfunction |
| Ignition system wires | Disconnect the switch connector, turn on the ignition, measure the voltage between the "4" and "2" plugs of the switch connector, then turn off the ignition | U=~12 V | If there is a deviation from the norm, there is a break or damage to the ignition system wires |
| Switch | Disconnect the ignition distributor sensor connector, turn on the ignition, measure the voltage between terminals "1" and "15" of the ignition coil | U≥2 V, U=0 V after 1-2 s | If there is a deviation from the norm, the switch is faulty |
| Switch | Turn on the ignition and measure the voltage between terminals "1" and "15" of the ignition coil by briefly short-circuiting the central wire of the ignition distributor sensor connector to ground | U=2 V (short-term) | If there is a deviation from the norm, there is a break, damage to the ignition system wires or the switch is faulty |
| Switch, integrity of wires and reliability of their connections | Measure the voltage between the outer wires of the ignition distributor sensor connector | U≥5 V | If there is a deviation from the norm, there is a break, damage to the ignition system wires, or the switch is faulty |
| Ignition distributor sensor | Short the secondary winding of the ignition coil to ground and measure the voltage with the switch connector undisconnected between plugs "6" and "3" on the wire side, turning the engine crankshaft manually | U=0-2 V | The ignition distributor sensor is faulty |
[The original article is available on the website audimanual.ru]