Nissan Altima 2007-2012 Service Manual: Refrigeration system

HFC-134a (R-134a) Service Procedure

SETTING OF SERVICE TOOLS AND EQUIPMENT

WARNING: Avoid breathing the A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose, and throat.

Remove the HFC-134a (R-134a) from the A/C system using certified service equipment meeting the requirements of SAE J2210 (R-134a recycling equipment) or SAE J2201 (R-134a recovery equipment).

If an accidental system discharge occurs, ventilate the work area before resuming service. Additional health and safety information may be obtained from the refrigerant and oil manufacturers.

Discharging Refrigerant

Evacuating System and Charging Refrigerant

Discharging, Evacuating, and Recharging the A/C System

*1 HA-21, "Maintenance of Oil Quantity in Compressor"

*2 HA-25, "Checking of Refrigerant Leaks"

*3 HA-25, "Checking of Refrigerant Leaks"

*4 HAC-5, "Operational Check"

*5 HA-4, "Contaminated Refrigerant"

Checking of Refrigerant Leaks

Perform a visual inspection of all refrigeration parts, fittings, hoses and components for signs of A/C oil leakage, damage and corrosion. A/C oil leakage may indicate an area of refrigerant leakage. Allow extra inspection time in these areas when using either an electronic refrigerant leak detector or fluorescent dye leak detector.

If dye is observed, confirm the leak with an electronic refrigerant leak detector. It is possible a prior leak was repaired and not properly cleaned.

When searching for leaks, do not stop when one leak is found but continue to check for additional leaks at all system components and connections.

When searching for refrigerant leaks using an electronic leak detector, move the probe along the suspected leak area at 25 - 50 mm (1 - 2 in) per second and no further than 6 mm (1/4 in) from the component.

CAUTION: Moving the electronic leak detector probe slower and closer to the suspected leak area will improve the chances of finding a leak.

    Oil
    Maintenance of Oil Quantity in Compressor The oil in the compressor circulates through the system with the refrigerant. Add oil to compressor when replacing any component or after a large refriger ...

    Fluorescent leak detector
    Checking System for Leaks Using the Fluorescent Leak Detector 1. Check A/C system for leaks using the UV lamp and safety goggles (J-42220) in a low sunlight area (area without windows preferable ...

    Other materials:

    Engine speed signal circuit
    Description • ECM sends engine speed signal to power steering control unit. Diagnosis Procedure 1.PERFORM ECM SELF-DIAGNOSIS Perform ECM self-diagnosis. Is any error system detected? YES >> Check the error system. NO >> GO TO 2. 2.CHECK HARNESS BETWEEN ECM AND POWER STEE ...

    P0740 torque converter clutch solenoid valve
    Description • The torque converter clutch solenoid valve is activated by the TCM in response to signals sent from the vehicle speed and accelerator pedal position sensors. Lock-up piston operation will then be controlled. • Lock-up operation, however, is prohibited when CVT fluid temper ...

    On-vehicle repair
    EVAP CANISTER Exploded View 1. EVAP control system pressure sensor 2. EVAP canister 3. O-ring 4. EVAP canister vent control valve 5. O-ring Removal and Installation REMOVAL 1. Lift up the vehicle. 2. Remove EVAP canister fixing bolt. 3. Remove EVAP canister. NOTE: The EVAP canis ...