Components - ENGINE COOLING - Fiat DOBLO 1.9 JTD 8V da 12/03
| Component code | Description | Reference to the assembly |
| B001 | JUNCTION UNIT | |
| C1 | BATTERY EARTH | |
| K36 | ENGINE COOLANT TEMPERATURE SENSOR/SENDER UNIT | |
| M010 | ENGINE MANAGEMENT ECU | |
| N011 | ENGINE FAN MOTOR - 1 | |
| O010 | ENGINE FAN ADJUSTMENT RESISTOR - 1 |
| Component code | Description | Reference to the assembly |
| B001 | JUNCTION UNIT | |
| C1 | BATTERY EARTH | |
| K36 | ENGINE COOLANT TEMPERATURE SENSOR/SENDER UNIT | |
| M010 | ENGINE MANAGEMENT ECU | |
| N011 | ENGINE FAN MOTOR - 1 | |
| O010 | ENGINE FAN ADJUSTMENT RESISTOR - 1 |
The radiator and condenser cooling system consists of an electric fan operated at two different speeds:- the first speed is activated at an intial engine coolant temperature level;- the second speed is engaged at a higher temperature.The fan is operated by means of two specific relays located near the engine compartment junction unit.The supply line for the fan and the relay energizing circuit are protected by two special fuses located in the engine compartment junction unit.The fan can therefore only be activated with the key ON.
The power supply for the fan N11 arrives directly from the battery via relays R6 and R7 housed in the engine compartment junction unit B01 through the line entering pin 1 connector A of the actual junction unit.The power supply for the relays is protected by fuses F7 for relay R7 and F6 for relay R6.They are energized by two distinct earth signal coming from the engine management control unit M10.The engine temperature sensor K36 measurs the temperature of the engine coolant and, if the values of this parameter are high, the control unit M10 sends an earth signal from pin 90 of connector A to the relay R6 (which manages the first fan speed) which energizes the coil. The relay R6 thens sends the power supply, via the resistance O10, activating the fan N11 at the first speed (slow).If the engine coolant reaches a higher temperature level, the control unit M10 sends an earth signal from pin 69 of connector A to the relay R7 which controls the second fan N11 speed making it turn at the maximum speed.
