System Operation
The intake door control judges intake door position based on the ambient atmospheric CO, NO2 and unpleasant odor, ambient temperature, the intake air temperature and the in-vehicle temperature. When DEF or OFF switch is pressed, the unified meter and A/C amp. sets the intake door at the FRE position.
Door Motor Circuit
Intake Door Control Specification
- Intake door position is basically fixed at FRE when FRE indicator of intake switch is OFF or DEF switch is ON.
- Intake door position is basically fixed at REC when REC indicator of intake switch is ON.
- Intake door automatic control selects FRE, 20 - 80%FRE, or REC depending on a target air mix door opening angle, based on in-vehicle temperature, ambient temperature, and sunload.
Courtesy of NISSAN NORTH AMERICA, INC.
Automatic intake control (exhaust gas/outside odor detecting mechanism)
Description
- In addition to air inlet automatic control of automatic air conditioning system, unified meter and A/C amp. controls automatically air inlet according to signal from exhaust gas/outside odor detecting sensor, so that unpleasant outside odor does not enter in passenger room.
Operation Description
- When AUTO switch is pressed, AUTO intake indicator and REC indicator turn ON. Air inlet is fixed to recirculation for approximately 5 minutes, and then is switched to automatic intake control (exhaust gas/outside odor detecting mechanism).
- Air inlet switches to recirculation when exhaust gas or outside odor is detected while automatic intake control (exhaust gas/outside odor detecting mechanism) is operated. After that, air inlet switches to fresh air intake when exhaust gas or outside odor becomes not detectable.NOTE:
- Sensitivity of exhaust gas/outside odor detecting sensor can be changed. Refer to "WITH ACCS: EXHAUST GAS/OUTSIDE ODOR DETECTING/OUTSIDE ODOR DETECTING SENSOR SENSITIVITY ADJUSTMENT FUNCTION ".
- Automatic intake control (exhaust gas/outside odor detecting mechanism) does not operate when ambient temperature is -2°C (28°F) or less. In this case, control is only for control of automatic air inlet of automatic air conditioning system.