Pre-heating system — general information (Peugeot 206)

Each swirl chamber contains a glow plug. Glow plugs are used when starting a cold engine. The glow plug supply is controlled by the preheating unit. On 1.9L (WJZ) engines, the control unit processes signals from the coolant temperature sensor and the fuel injection pump lever position. On the latest 1.9L (WJY) engines, as well as on 2.0L engines, the preheating unit is controlled by the fuel injection system.

After the engine has started, the glow plugs continue to operate for some time. The driver is informed of the preheating by a control lamp in the instrument cluster. If the lamp goes out, the engine is ready to start. Power continues to be supplied to the glow plugs for a few seconds after the lamp goes out. If there are no attempts to start the engine during this time, the timer will turn off the power to the glow plugs to prevent the battery from discharging and the plugs from overheating.