Attention! The ignition system generates a very high voltage, therefore, when performing work, electrical safety rules must be observed.
1. If the engine does not start, and the starter turns the crankshaft, then disconnect the high-voltage wires from the spark plugs and connect a calibrated spark gap to them, or disconnect the wire from one of the spark plugs, remove the insulating tip and fix the wire at a distance of about 6 mm from the exposed mass.
2. Turn the crankshaft with the starter and keep an eye on the spark gap or spark plug wire. An intense blue spark should appear.
3. If there is a spark, then the necessary voltage is applied to the candles (check the rest of the wires to make sure the distributor cap and runner are working). Remove spark plugs and check.
4. If there is no spark, or sparking is unstable, then remove the distributor cap and check the condition of the cap and slider. If moisture is detected, wipe the lid and slider dry, reinstall the lid, and retest.
5. If there are still no sparks, then disconnect the high-voltage wire of the ignition coil from the distributor cap and connect the wire to the test gap or fix the coil wire at a distance of about 6 mm from the ground.
6. If a spark appears, then the cause may be a malfunction of the distributor cap, runner or wires.
7. If there is no spark, check all ignition coil primary circuit wiring for clean and secure connections. Check if there is voltage to the coil from the ignition switch. Check ignition coil (see subsection 3.4.5) and inductive distributor sensor (see subsection 3.4.8). Make any necessary repairs and repeat the test.
8. If there is still no spark, then replace the wire connecting the ignition coil and the distributor cap (check the resistance of the wire and compare with the standard). If replacing the wire with a known good one does not work, then the electronic ignition unit is faulty.
9. Check if battery voltage is supplied to the electronic unit when the ignition is switched on. If there is no voltage, replace the electronic unit.