2001 Nissan Altima A/C & Heater Service (ONLINE REPAIR MANUALS)

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A/C & HEATER SERVICE PROCEDURES FOR 2001 Nissan Altima AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 2001 Nissan Altima cars and light trucks from 1990+

Air Bag System Precautions -> Nissan -> Arming
Vehicle: 2001 Nissan Altima 2.4 L4 GAS

  • Ensure no one is inside vehicle.
  • Connect air bag module electrical connector.
  • Connect battery positive cable, then the ground cable.
  • From a safe location at the sides of or below the air bag modules, turn ignition On and observe SRS ...

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A/C & HEATER SERVICE PROCEDURES FOR 2001 Nissan Altima AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 2001 Nissan Altima cars and light trucks from 1990+

Nissan -> Component Replacement & Adjustment -> Compressor, Replace -> Altima, Frontier, Maxima, Pathfinder, Sentra & Xterra -> Quest
Vehicle: 2001 Nissan Altima 2.4 L4 GAS

Altima, Frontier, Maxima, Pathfinder, Sentra & Xterra

  • Recover refrigerant as outlined under .
  • Loosen air conditioning idler pulley and remove drive belt from compressor pulley.
  • Disconnect compressor electrical connector.
  • Disconnect compressor refrigerant lines. Cap or plug lines and openings.
  • Remove mounting bolts and compressor, Figs. through .
  • Remove compressor bracket, as required.
  • Reverse procedure to i...

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A/C & HEATER SERVICE PROCEDURES FOR 2001 Nissan Altima AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 2001 Nissan Altima cars and light trucks from 1990+

Nissan -> Automatic Temperature Control System Diagnosis & Testing -> Description -> Air Mix Door Motor -> Ambient Temperature Sensor -> Aspirator -> Automatic Amplifier -> Engine Coolant Ambient Temperature Sensor -> Fan Control Amplifier -> Front Blower Speed Control Module -> In-Vehicle Sensor -> Intake Door Motor -> Intake Temperature Sensor -> Maxima -> Maxima & Pathfinder -> Mode Door Motor -> Pathfinder -> Potentiometer Temperature Control (PTC) -> Quest -> Sunload Sensor -> System Components
Vehicle: 2001 Nissan Altima 2.4 L4 GAS

System Components

Refer to Figs. and for system component input and output controls.

Automatic Amplifier

The automatic amplified has a built-in microcomputer which processes information sent from various sensor need for air conditioner operating. The air mix door motor, mode door motor, intake door motor, blower motor and compressor are then controlled. The auto amplified is unitized with control mechanisms. Signals from various switches and Potentiometer Temperature Control (PTC) are directly entered into the auto amplified. Self-diagnostic functions are also...

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A/C & HEATER SERVICE PROCEDURES FOR 2001 Nissan Altima AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 2001 Nissan Altima cars and light trucks from 1990+

Nissan -> Component Replacement & Adjustment -> Control Module, Replace -> Altima -> Frontier -> Maxima -> Pathfinder -> Quest -> Sentra -> Xterra
Vehicle: 2001 Nissan Altima 2.4 L4 GAS

Altima

  • Remove instrument panel lower covers.
  • Disconnect clips and remove transaxle shifter finisher or boot.
  • Remove four mounting screws and center instrument panel lid C.
  • Remove four mounting screws, then the audio and deck pocket.
  • Remove four mounting screws, then the air conditioning and heater control module.
  • Reverse procedure to install.

Frontier

  • Remove two mounting screws and disconnect connectors, then remove cluster lid C.
  • Remove four mounting screws and disconnect connectors, then remove audio unit.
  • ...

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A/C & HEATER SERVICE PROCEDURES FOR 2001 Nissan Altima AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 2001 Nissan Altima cars and light trucks from 1990+

Electrical Symbol & Wire Color Code Identification -> Electrical Symbol Identification -> Imported Vehicles
Vehicle: 2001 Nissan Altima 2.4 L4 GAS

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A/C & HEATER SERVICE PROCEDURES FOR 2001 Nissan Altima AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 2001 Nissan Altima cars and light trucks from 1990+

Nissan -> Automatic Temperature Control System Diagnosis & Testing -> Component Diagnosis & Testing -> Air Conditioning Switch -> Air Mix Door Motor -> Ambient Sensor -> Automatic Amplifier -> Blower Motor -> Blower Motor Resistors -> Engine Coolant Ambient Temperature Sensor -> Fan Control Amplifier -> Fan Switches -> In-Vehicle Sensor -> Intake Door Motor -> Intake Sensor -> Maxima & Pathfinder -> Pathfinder -> Pressure Switches -> Quest -> Refrigerant Pressure Sensor -> Relays -> Sunload Sensor
Vehicle: 2001 Nissan Altima 2.4 L4 GAS

Components described may be found in both manual air conditioning and automatic temperature control systems. Refer to appropriate wiring diagram for additional information.

Automatic Amplifier

Pathfinder
  • Turn ignition switch to On position.
  • Measure power supply voltage between automatic amplifier terminals Nos. 26, 27, 33 and body ground.
  • Measurement should be approximately 12 volts.
  • Turn ignition switch to OFF position.
  • Inspect for ground circuit continuity between automatic amplifier terminals Nos. 32 and body gr...

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