Follow us on Twitter and win Autohex II Scan Tool for Kia and Hyundai (worth 945.00 USD)

The direct injection engine is characterised by improved thermodynamic efficiency than an indiret injection injection engine, due to the reduction in heat loss via the walls. The coolant is used by the passenger compartment heating system. In extream cold conditions, it is therefore difficult to reach a comfortable temperature in the passenger compartment. To reduce the length of the increase in the temperature phase, vehicles powered by direct injection engines are fitted with heating resistors located directly in the cooling circuit. The electrical power of each water heater component is 300 W. The water heater relay coil is energized to turn on the relay switch, which activites the water heaters by the ECM, according to the signal of water temperature sensor. The ECM cuts the feed to the water heaters when the period determined by the map has expired or when the coolant temperature exceed 65?(149?). Supply may also be cut for a moment if the battery voltage drops below 10 V. In case of the water heter relay failure, the symptom of A/C conditioning system will occur a water heaters deactivation.