Pic. 3-50. Wiring diagram of the engine preheating system «1Y», «RA», «SB», «AAZ»:
1 - battery;
2 - starter;
3 - spark plug;
4 - starting candle;
5 — a control lamp of preheating;
6 - preheating control unit;
7 - shut-off fuel valve;
8 - relay for switching on starting candles;
9 - coolant temperature sensor;
10 - fuse No. 15 of the fuel shut-off valve (10 A);
11 - fuse number 15 (10 A) on the instrument panel;
12 - fuse (15 A) starting candles.
Wire color designation:
B - white;
G - blue;
W - yellow;
3 - green;
K - red;
Kch - brown;
H - black.
the letter indicates the color of the wire itself, the second - the color of the strip on the wire
Voltage is supplied to the starting plugs when the instrument and starter switch key is set to the position «Preheating» or «Starter», and turns off when the key is in the working position. The driver sets the key to position «Starter» only after the preheating time has elapsed, otherwise the engine may not start.
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