Nissan Altima Owners Manual: Controls
Fan control dial
The fan control dial turns the fan on and off, and controls fan speed.
Air flow control buttons
The air flow control buttons allow you to select the air flow outlets.
MAX A/C - Air flows from center and side vents with maximum cooling.
- Air flows from center and side
vents.
- Air flows from center
and side
vents and foot outlets.
- Air flows mainly from foot
outlets.
- Air flows from defroster
outlets and
foot outlets.
- Air flows mainly from
defroster
outlets.
Temperature control dial
The temperature control dial allows you to adjust the temperature of the outlet air. To lower the temperature, turn the dial to the left. To increase the temperature, turn the dial to the right.
Air recirculation b
On position (Indicator light on):
Interior air is recirculated inside the vehicle.
Press the 
button to the ON position
when:
● driving on a dusty road.
● to prevent traffic fumes from entering passenger compartment.
● for maximum cooling when using the air conditioner.
Off position (Indicator light off):
Outside air is drawn into the passenger compartment and distributed through the selected outlet.
Use the off position or normal heater or air conditioner operation.
Air conditioner button
Start the engine, turn the fan control dial to the desired position and press the button to turn on the air conditioner. The indicator light comes on when the air conditioner is operating.
To turn off the air conditioner, press the button again.
The air conditioner cooling function operates only when the engine is running.
Rear window and outside mirror (if so equipped) defroster switch
For more information about the rear window and outside mirror (if so equipped) defroster switch, see “Rear window and outside mirror defroster switch” in the “Instruments and controls” section of this manual.
Heater and Air Conditioner (manual) (if so equipped)
1. Fan speed control / system OFF dial /
air conditioning (A/C) button
2. Air flow control buttons
3. Temperature control dial / MAX A/C
button
4. Air recirculation button
5. Rear window defro ...
Heater operation
Heating
This mode is used to direct heated air to the foot
outlets. Some air also flows from the defrost
outlets and the side vent outlets.
1. Press the button to the OFF
position
for normal h ...
Other materials:
P0451 evap control system pressure
sensor
Description
The EVAP control system pressure sensor detects pressure in the
purge line. The sensor output voltage to the ECM increases as pressure
increases.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously con ...
Brake precautions
Vacuum assisted brakes
The brake booster aids braking by using engine
vacuum. If the engine stops, you can stop the
vehicle by depressing the brake pedal. However,
greater foot pressure on the brake pedal will be
required to stop the vehicle and stopping distance
will be longer.
Using the b ...
IPDM E/R (intelligent power distribution
module engine room)
Diagnosis Procedure
1. CHECK FUSES AND FUSIBLE LINK
Check that the following IPDM E/R fuses or fusible link are not blown.
Is the fuse blown?
YES >> Replace the blown fuse or fusible link after repairing the affected
circuit.
NO >> GO TO 2
2. CHECK POWER SUPPLY CIRCUIT
1. Tu ...