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pressure:
Decreases to 2.1 ± 0.2 bar (31.5 ± 3 lbf/in²); the ATC module loads the A/C compressor again when the pressure increases to 2.3 ± 0.2 bar (33.4 ± 3 lbf/in²).
Increases to 31 ± 1 bar (450 ± 14.5 lbf/in²); the ATC module loads the A/C compressor again when the pressure decreases to 26 ± 1 bar (377 ± 14.5 lbf/in²).
Evaporator Temperature Sensor
The evaporator temperature sensor is a NTC thermistor that provides the ATC module with a temperature signal from the downstream side of the evaporator. The evaporator temperature sensor is mounted directly onto the evaporator matrix fins.
The ATC module uses the input from the evaporator temperature sensor to control the load of the A/C compressor and thus the operating temperature of the evaporator.
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A capacitive sensor element to measure humidity.
A motor driven fan to draw air through the sensor and over the sensing elements.
The humidity sensor element is built out of a film capacitor on different substrates. The dielectric is a polymer which absorbs
or releases water proportional to the relative humidity of the air being drawn through the sensor, and thus changes the
capacitance of the capacitor. For protection, the sensor element is contained in a nylon mesh cover.
Humidity within the passenger compartment is controlled by raising and lowering the evaporator temperature. An increase in
evaporator temperature increases the moisture content of the air entering the passenger compartment. Lowering the
evaporator temperature reduces the moisture content of the air entering the passenger compartment. Humidity and Temperature Sensor
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1 LH door mirror 2 Ambient air temperature sensor The ambient air temperature sensor is a NTC thermistor that provides the ATC module with an input of external air temperature. The sensor is hard wired to the ECM and its signal is transmitted to the instrument cluster on the high speed CAN bus. The instrument cluster acts as a gateway and transmits the ambient air temperature signal to the ATC module on the medium speed CAN bus. The sensor is installed in the LH door mirror, and is accessed by removing the mirror glass, cap and actuator.
Sunload Sensor
The sunload sensor consists of two photoelectric cells that provide the ATC module with inputs of light intensity; one as sensed coming from the left of the vehicle and one as sensed coming from the right. The inputs are a measure of the solar
heating effect on vehicle occupants, and are used by the ATC module to adjust blower speed, temperature and distribution to improve comfort.
The sensor is installed in the speaker grill on the upper surface of the instrument panel. Power for the sensor is provided by a
5 V feed from the instrument cluster.
The sensor also contains the active anti-theft alarm indicator.
Refer to: Anti-Theft - Active (419-01 Anti-Theft - Active, Description and Operation). Ambient Air Temperature Sensor
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as nitrous oxides, sulphur oxides and carbon monoxide. The sensor is attached to the center of the upper front crossmember.
The pollution sensor is powered by an ignition controlled voltage feed from the CJB and provides the ATC module with separate signals of hydrocarbon and oxidized gas levels. With a pollution sensor fitted, the ATC module can control the air inlet source to reduce the amount of contaminants entering the passenger compartment. This function is fully automatic, but can be
overridden by manual selection of the air source using the recirculation switch on the integrated control panel.
If there is a fault with the sensor, the ATC module disables automatic operation of the recirculation door.
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Climate Control - Ambient Air Temperature Sensor
Removal and Installation
Removal
NOTE: Removal steps in this procedure may contain installation details. Published: 11-May-2011
1. Refer to: Exterior Mirror Cover (501-09 Rear View Mirrors, Removal and Installation).
2.
3. www.JagDocs.com
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Climate Control - Blower Motor
Removal and Installation
Removal
NOTE: Removal steps in this procedure may contain installation details. Published: 11-May-2011
1. Refer to: Battery Disconnect and Connect (414-01 Battery, Mounting and Cables, General Procedures).
2.
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