Verification requirements
1. The engine must be cold (ambient temperature), the battery is fully charged: voltage >11.5V.
2. Disconnect the contact cable and glow plug bus.
3. Connect a voltage monitor or low power light bulb to the positive terminal of the battery and in series to each glow plug.
4. If the LED lights up, the spark plug is good.
5. If the LED does not light, the spark plug is faulty and must be replaced.
Note: The tightening force must not exceed the specified value, otherwise the ring between the heating element and the threaded part of the spark plug will be overtightened and the spark plug will fail prematurely. In case of burning of the spark plug tip, see the instructions.
6. Connect the cable terminal to the bus.
7. Connect the cable to the temperature sensor.
Checking the glow plug relay
8. Disconnect the glow relay.
9. Connect a tester or voltmeter to terminal 30 and ground.
10. Turn on the ignition. The LED should flash, otherwise check the battery voltage.
11. Connect a tester or voltmeter to terminal 86 and ground.
12. Turn on the ignition. The LED should flash, otherwise check the ignition switch voltage. If the LED lights, check the glow plug wires for breakage, replace if necessary. Otherwise, replace the glow relay.
Candles with burnt tips
13. A burnt tip is usually the result of a faulty injector. Such faults affect not only the operation of glow plugs.
14. If a burnt candle is found (see arrow in the picture), it is not enough to just replace it. The injectors must be checked for passability, rattling, opening pressure, and tightness.
15. It should be remembered that with a short, fast piston stroke (4-6 moves/sec) there is no stream, it is sprayed.
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