Iveco Daily. Manual — part 420
206
ELECTRIC/ELECTRONIC SYSTEM
D
AILY
Base - May 2004
This is an NTC sensor on the left wing mirror (Figure 235) for
both types of drive.
The resistance at 25 °C is 10 kOhm.
Operating range between - 30 °C and + 50 °C.
It is connected to pin 6 connector B of the control unit.
OUTSIDE TEMPERATURE SENSOR
Figure 235
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AILY
Inside temperature sensor
This is an NTC sensor located on the climate control module (Figure 237) between the two Re-circulation" and ECO"
switches.
It is ventilated and contains a motor/fan so that the temperature reading is not affected by stagnating air inside the dashboard
which is not realistic.
The resistance is 2.2 kOhm at 25 °C
Operating range between + 5 °C and + 45 °C
It is connected to pin 7 connector B of the control unit.
The motor A, fan B and sensor C are a single part and are connected to the wiring by a single connector at pin 12.
Pin
Function
1
Positive for motor
2
Negative for motor
3
Signal earth
4
Sensor signal for control unit (pin 7 connector B)
5
Positive from microswitch for MAX DEF" function to control unit (pin 6 connector A)
6
Ċ
7
Positive from ECO" switch to control unit (pin 5 connector A)
8
Earth
9
+15/A supply
10
+15/A supply
11
Negative for lighting pictograms
12
Positive from re-circulation switch to control unit (pin 12 connector A)
A
B
C
Figure 236
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208
ELECTRIC/ELECTRONIC SYSTEM
D
AILY
Base - May 2004
This is an NTC sensor positioned inside the distributor unit
upstream of the air distribution ports to the various vents.
The resistance at 25 °C is 10 kOhm.
Operating range between 0 °C and - 80 °C
It is connected to pin 1 connector A of the control unit.
Evaporator temperature sensor
This is an NTC sensor positioned inside the distributor unit
and it is fitted directly on the evaporator. It causes switching
on (>4 °C) and switching off (>3.5Ă°C) of the compressor
electromagnetic clutch. The resistance at 25 °C is 10 kOhm.
Operating range between 0 °C and +25 °C.
It is connected to pin 3 connector B of the control unit.
Required temperature potentiometer
This is a potentiometer connected to the required
temperature setting knob on the climate control panel.
It detects the various angular positions (Figure 238) and
transmits a signal to the electronic control unit for a total of
fifteen different positions (one per degree centigrade) two of
which are the extremes HI" and LO" which correspond
respectively to a request for the coldest and warmest
positions.
It is supplied by the control unit at 5V.
Resistances R1 to R16 are approx. 700 Ohm.
Resistance R17 is approx. 1.1 Mohm
The total resistance R is approx. 11 kOhm.
It is connected to pin 2 and 9 connector A of the control unit.
REQUIRED TEMPERATURE SETTING KNOB
POTENTIOMETER POSITION DETECTION LAYOUT
A. Signal earth (ms7) - B. Signal to control unit pin 2 connector A - C. positive from control unit pin 9 connector A
A
C
B
Figure 237
Figure 238
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Ventilation control potentiometer
This is a potentiometer connected to the ventilation control
knob positioned on the climate control panel.
It detects the various angular positions (Figure 240) and
transmits a signal to the electronic control unit for a total of
six different positions, four of which are manual flows (1, 2, 3,
and 4), one no air flow and one automatic (AUTO).
It is supplied by the control unit at 5 V.
The resistance R1 to R7 are approx. 1.5 kOhm.
Resistance R8 is approx. 1.1 Mohm.
The total resistance R is approx. 10.5 kOhm.
It is connected to pins 3 and 9 connector A of the control unit.
VENTILATION CONTROL KNOB
POTENTIOMETER POSITION DETECTION LAYOUT
A. Signal earth (ms7) - B. signal to control unit pin 3
connector A - C. Positive from control unit pin 9
connector A
A
C
B
Figure 239
Figure 240
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