Examination
1. If a malfunction occurs in the system, the check can be carried out by replacing it with known-good elements, but it is still worthwhile to carry out some preliminary tests.
2. Connect a voltmeter or 12 volt test light between the glow plug power wire and "weight" car (metal parts of the body or engine).
Warning: Do not touch metal parts of the body and engine with the power cable.
3. Ask an assistant to turn on the 'ignition' and check the voltage at the candles. Pay attention to the duration of the glow on the dashboard of the warning signal and the duration of the presence of voltage in the candles. At the end of the warm-up period, the voltage should drop to zero
4. If there is no power and glow at all - the malfunction lies in the control unit, relay or electrical purposes.
5. To locate the faulty spark plug, unscrew the nuts, remove the washers, and disconnect the power wire and power rail from the spark plugs.
6. If you have an ammeter, you can check the current through each candle. After the first pulse of 10... 15 A, the current should drop to 8 A. A candle, the current through which is less or more than the indicated values, may be faulty.
7. Finally, the spark plug can be removed and checked as described below.
Withdrawal
8. Disconnect the negative cable from the battery and carefully move it away from the terminal as described in chapter 5A.
9. Loosen the nuts securing the supply wire to the candles. Remove the tire from the spark plugs.
10. Turn out candles and remove them from a head of cylinders (pic. 2.10).
11. Check the spark plugs for mechanical damage. Burnouts or tip erosion can be caused by faulty nozzle atomizers. Check the injectors if you see any damage as described in chapter 4B.
Installation
12. Installation is the reverse procedure. Tighten the spark plugs to the prescribed torque.
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