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+

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 -> 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+

Imported Cars & Light Trucks & Vans -> 2001-02 -> Precautions -> A/C Refrigerant Oil -> Battery Ground Cable -> Cleanliness -> Engine Coolant -> Exercise System -> General Service -> Product Compatibility -> R-134a -> Safety
Vehicle: 2001 Nissan Altima 2.4 L4 GAS

Battery Ground Cable

Prior to service disconnect battery ground cable and isolate as required.

Product Compatibility

A/C Refrigerant Oil

Before replenishing refrigerant oil, ensure product compatibility with the system being serviced. Refer to "A/C Data" for specifications.

Engine Coolant

Before adding or replacing engine coolant, ensure product compatibility with the system being serviced. If using orange silicate-free coolant, do not mix with green silicated coolant. If mixed, premature engine, heater core or radiator corrosion may result.

...

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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 -> Manual Air Conditioning & Heater System Diagnosis & Testing -> Air Conditioning Component Diagnosis & Testing -> Air Conditioning Switch -> Air Mix Door Motor -> Altima -> Blower Motor -> Blower Resistor -> Dual Pressure Switch -> Fan Switch -> High Pressure Switch -> Low Pressure Switch -> Mode Switch -> Pathfinder -> Push Control Module -> Recirculation Switch -> Refrigerant Pressure Sensor -> Relay -> Thermal Control Amplifier -> Thermal Protector -> Triple Pressure Switch
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.

Push Control Module

Altima
  • Turn ignition switch to ON position.
  • Disconnect push control module harness connector.
  • Measure voltage between terminal No. 14 and body ground.
  • Measurement should be approximately 12 volts.
  • Turn ignition switch to OFF position.
  • Inspect for continuity between terminal No. 17 and body ground.
  • ...

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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 -> Heater Core, Replace -> Altima & Sentra -> Frontier & Xterra -> Maxima -> Quest
Vehicle: 2001 Nissan Altima 2.4 L4 GAS

Altima & Sentra
  • Drain cooling system.
  • Disconnect heater hoses in engine compartment.
  • Remove cooling unit as outlined under "Evaporator Core, Replace."
  • Remove steering member as outlined under "Instrument Panel, Replace."
  • Remove heater unit and core, Figs. and .
  • Reverse procedure to install.
Frontier & Xterra
  • Drain cooling system and disconnect engine compartment heater hoses.
  • Remove cooling unit as outlined under "Evaporator Core, Replace."
  • Remove instrument panel as outlined under "Instrument Panel, Replace.".
  • ...

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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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