GENERAL INFORMATION

OUTLINE OF CHANGES

<4N1>

Due to the change below, the service procedure has been added. The other service procedures are the same as before.

Glow control unit bracket has been changed.

<4D5>

Due to the addition of vehicles with 4D5 engine, the service procedure has been established.

GLOW SYSTEM <4D5>

The self-regulating glow system enables the vehicle to start ideally at low temperature by preheating the glow plug at super speed. When the ignition switch is turned to the ON position, the engine-ECU supplies electric currents and controls the diesel preheat indicator lamp illumination in accordance with the engine coolant temperature. The control resistance wire built in the glow plug has a higher resistance as the glow plug temperature becomes higher. Because of this, the currents in the heater wire gradually decrease. The glow plug is stabilized at the specified temperature. After the engine start at low temperature, the current going to the glow plug is controlled to perform the stable combustion.
SYSTEM DIAGRAM