Basic System (HVAC): Overview Mazda MX-5 NC

Scheme 1

Scheme 2

Scheme 3

Scheme 4

1. Remove the battery cover.
2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [LF]» )
3. Discharge the refrigerant from the system. (See «REFRIGERANT RECOVERY»(/mazda/mx-5/nc-2005-2008/remont/manual-hvac-system/#refrigerant-system-hvac__refrigerant-recovery).) (See «REFRIGERANT CHARGING»(/mazda/mx-5/nc-2005-2008/remont/manual-hvac-system/#refrigerant-system-hvac__refrigerant-charging).)
4. Drain the engine coolant. (See «ENGINE COOLANT REPLACEMENT [LF]».)
5. Disconnect from A/C unit in the order in (Scheme 2). CAUTION: If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and abnormal noise or other malfunction could occur. Always plug open fittings immediately after removing any refrigeration cycle parts.
6. Remove the following parts: Console (See «CONSOLE REMOVAL/INSTALLATION».) Glove compartment (See «GLOVE COMPARTMENT REMOVAL/INSTALLATION».) Side wall (See «SIDE WALL REMOVAL/INSTALLATION».) Console panel (See «CONSOLE PANEL REMOVAL/INSTALLATION».) Center panel unit (See «CENTER PANEL UNIT REMOVAL/INSTALLATION».) Lower panel (See «LOWER PANEL REMOVAL/INSTALLATION».) Knee bolster Column cover (See «COLUMN COVER REMOVAL/INSTALLATION».) Driver-side air bag module (See «DRIVER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION».) Steering wheel (See «STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION».) Combination switch (See «COMBINATION SWITCH REMOVAL/INSTALLATION».) Steering shaft (See «STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION».) Meter hood (See «METER HOOD REMOVAL/INSTALLATION».) Instrument cluster (See «INSTRUMENT CLUSTER REMOVAL/INSTALLATION».) Side panel (See «SIDE PANEL REMOVAL/INSTALLATION».) Hood release lever (See «HOOD LATCH AND RELEASE LEVER REMOVAL/INSTALLATION».) Female bracket (See «CONVERTIBLE TOP DISASSEMBLY/ASSEMBLY».) A-pillar trim (See «A-PILLAR TRIM REMOVAL/INSTALLATION».) Scuff plate (See «SCUFF PLATE REMOVAL/INSTALLATION».) Front side trim (See «FRONT SIDE TRIM REMOVAL/INSTALLATION».) Fuse box No.1 Dashboard (See «DASHBOARD REMOVAL/INSTALLATION».)
7. Remove the air distribution unit and A/C unit.
8. Disassemble the air distribution unit (Scheme 4)
9. Install in the reverse order of removal.
10. Perform the refrigerant system performance test. (See «REFRIGERANT SYSTEM PERFORMANCE TEST»(/mazda/mx-5/nc-2005-2008/remont/manual-hvac-system/#refrigerant-system-hvac).)

Scheme 5

1. Disassemble in the order indicated in (Scheme 5). CAUTION: If a non-specified grease is used, it may result in abnormal noise or improper operation of the links. Apply only the specified grease to each link.
2. Assemble in the reverse order of disassembly.

Scheme 6

Scheme 7

1. Remove battery cover.
2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [LF]».)
3. Discharge the refrigerant from the system. (See «REFRIGERANT RECOVERY»(/mazda/mx-5/nc-2005-2008/remont/manual-hvac-system/#refrigerant-system-hvac__refrigerant-recovery).) (See «REFRIGERANT CHARGING»(/mazda/mx-5/nc-2005-2008/remont/manual-hvac-system/#refrigerant-system-hvac__refrigerant-charging).)
4. Drain the engine coolant. (See «ENGINE COOLANT REPLACEMENT [LF]».)
5. Disconnect from A/C unit in the order in (Scheme 6). CAUTION: If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and abnormal noise or other malfunction could occur. Always plug open fittings immediately after removing any refrigeration cycle parts.
6. Remove the A/C unit and air distribution unit. (See «AIR DISTRIBUTION UNIT REMOVAL/INSTALLATION».)
7. Disassembly the A/C unit (Scheme 7)
8. Install in the reverse order of removal.
9. Perform the refrigerant system performance test. (See «REFRIGERANT SYSTEM PERFORMANCE TEST»(/mazda/mx-5/nc-2005-2008/remont/manual-hvac-system/#refrigerant-system-hvac).)

Scheme 8

1. Disassemble in the order indicated in (Scheme 8). CAUTION: If a non-specified grease is used, it may result in abnormal noise or improper operation of the links. Apply only the specified grease to each link. If the air mix damper is removed and reinstalled improperly because the original installation position cannot be specified, the air mix damper and air mix actuator may be damaged when it is operated. Therefore, set the air mix to the middle position before disassembling so that the installation position can be specified.
2. Assemble in the reverse order of disassembly.

Scheme 9

1. Assemble the evaporator temperature sensor (Scheme 9)

See also:
• REFRIGERANT RECOVERY
• REFRIGERANT CHARGING
• REFRIGERANT SYSTEM PERFORMANCE TEST