Glow-plug System: Preheating

Preheating is activated after terminal 15 has been switched on. The heater system indicator in the instrument cluster is activated at a coolant temperature of ≤ 10°C.

Preheating is finished when:

• The engine speed threshold of 42 rpm is exceeded (starter is operated) or
• the preheating time has elapsed. The preheating time is dependent on the coolant temperature and is defined in a characteristic curve.
  CHARACTERISTIC CURVE REFERENCE
  
  

  Coolant temperature in °C	Preheating time in seconds
  < -35	3.5
  -25	2.8
  -20	2.8
  -5	2.1
  0	1.6
  5	1.1
  30	1.1
  > 30	0