62B-97
MR-413-X44-62B000$966_eng.mif
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Vdiag No.: 44
62B
Examples of measurements taken using the oscilloscope with the engine at idle speed (given as a guide):
* Passenger compartment blower unit PWM voltage of the modulated control for the passenger compartment
blower unit.Passenger compartment
blower speed01 23 45 67 8
Duration of high status 450 µs 400 µs 350 µs 300 µs 250 µs 200 µs 150 µs
Duration of low status 50 µs 100 µs 150 µs 200 µs 250 µs 300 µs 350 µs
PR019 Passenger
compartment blower
PWM* setting0 % 20 % 25 % 33 % 43 % 50 % 60 % 77 % 100 %
62B-98
MR-413-X44-62B000$966_eng.mif
V1
CLIMATE CONTROL
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Vdiag No.: 44
62B
ELECTRICAL SPECIFICATIONS OF THE INTERIOR TEMPERATURE SENSOR ACCORDING TO
TEMPERATURE (TOLERANCE: ± 5 %)
INTERIOR TEMPERATURE SENSOR
Temperature Sensor resistance
- 30 ˚C 175200 ΩΩ Ω Ω
- 25 ˚C 129300 ΩΩ Ω Ω
- 20 ˚C 96360 ΩΩ Ω Ω
- 15 ˚C 72500 ΩΩ Ω Ω
- 10 ˚C 55050 ΩΩ Ω Ω
- 5 ˚C 42160 ΩΩ Ω Ω
- 0 ˚C 32560 ΩΩ Ω Ω
5 ˚C 25340 ΩΩ Ω Ω
10 ˚C 19870 ΩΩ Ω Ω
15 ˚C 15700 ΩΩ Ω Ω
16 ˚C 14991 ΩΩ Ω Ω
17 ˚C 14318 ΩΩ Ω Ω
18 ˚C 13679 ΩΩ Ω Ω
19 ˚C 13074 ΩΩ Ω Ω
20 ˚C 12490 ΩΩ Ω Ω
21 ˚C 11942 ΩΩ Ω Ω
22 ˚C 11422 ΩΩ Ω Ω
23 ˚C 10928 ΩΩ Ω Ω
24 ˚C 10458 ΩΩ Ω Ω
25 ˚C 10000 ΩΩ Ω Ω
26 ˚C 9574 ΩΩ Ω Ω
27 ˚C 9168 ΩΩ Ω Ω
28 ˚C 8783 ΩΩ Ω Ω
29 ˚C 8416 ΩΩ Ω Ω
30 ˚C 8059 ΩΩ Ω Ω
35 ˚C 6535 ΩΩ Ω Ω
40 ˚C 5330 ΩΩ Ω Ω
45 ˚C 4372 ΩΩ Ω Ω
50 ˚C 3606 ΩΩ Ω Ω
55 ˚C 2989 ΩΩ Ω Ω
60 ˚C 2490 ΩΩ Ω Ω
62B-99
MR-413-X44-62B000$966_eng.mif
V1
CLIMATE CONTROL
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Vdiag No.: 44
62B
OPERATION OF THE ENGINE COOLING FAN ASSEMBLY AS A FUNCTION OF THE REFRIGERANT FLUID
PRESSURE AND VEHICLE SPEED
Relative pressure (bar)
GMV = 1 Low-speed engine cooling fan
GMV = 2 High-speed engine cooling fan
GMV = 0 Engine cooling fan stopped
The engine cooling fan assembly is not used for vehicle speeds in excess of 70 km/h, except in rare cases where
the refrigerant fluid pressure is greater than 23 bar despite the high speed (e.g. driving behind a lorry).
When the vehicle is stationary, the engine cooling fan is always used at low speed if the refrigerant fluid relative
pressure is below 19 bar, otherwise it is used at high speed.
While the vehicle is being driven, the engine cooling fan may either not operate, or operate at low or high speed
depending on the refrigerant fluid pressure at the condenser outlet and the vehicle speed.27
23
19
11
1
0AIR CONDITIONING INHIBITION
GMV = 2
GMV = 2 GMV = 1 GMV = 0
GMV = 1 GMV = 0
GMV = 1 GMV = 0
AIR CONDITIONING INHIBITION
20 30 45 70Vehicle speed in mph
