The spark plug used in this vehicle is self-adjusting.
To do this, in addition to the heating coil, the candle has a control coil, which is connected in series with the heating coil and serves to limit the current and stabilize the temperature of the candle as it warms up due to an increase in the resistance of the control coil.
Control parameters of the glow plug preheating system
Control parameter | Normal value |
Resistance between glow plug body and positive terminal (at 20°C) for parallel connection of 4 candles | 0.15-0.25 ohm |
Spark plug voltage immediately after ignition on (without starter) | 9-11 V (drops to 0 V after 4-8 seconds, which means the end of preheating) |
Spark plug voltage when engine is cranked | At least 6 V |
Spark plug voltage after engine start | 12-15V (drops to 0 V after warming up to 60"From or after 180 seconds after starting the engine) |
Relay solenoid resistance at 20°C on contacts C and E (see fig. M2 2.184) | 18-22 ohm |
Resistance of one spark plug at 20°C | 0.6 -1.0 ohm |
Operating modes of glow plugs
Preheating before starting
Activated with ignition on Engine temperature: 60°C and below. Maximum warm-up time: approx. 10 sec.
The indicator light is on.
Post-start warm-up
It is used to align the operation of engine cylinders.
Engine temperature: 60°C and below. Maximum warm-up time: approx. 180 sec.
Engine speed: not less than 360 rpm.
Starter is off.
The indicator light is off.