Basic System (HVAC): Diagnosis Mazda CX-7 I facelift

AIR FILTER INSPECTION

1. Inspect for damage, excessive dirt, or foul smell. If the air filter is damaged, excessively dirty, or foul smelling, replace it. NOTE: The air filter cannot be reused by cleaning it with water or compressed air.

EVAPORATOR INSPECTION

1. Remove the A/C unit. (See «A/C UNIT REMOVAL/INSTALLATION»(ref-343797-S02687149412009101500000) .)
2. Remove the evaporator from the A/C unit.
3. Inspect for cracks, damage, and oil leakage. If any problems are found, replace the evaporator.
4. Inspect for bent fins. If any are bent, use a flathead screwdriver to straighten them.

HEATER CORE INSPECTION

1. Remove the A/C unit. (See «A/C UNIT REMOVAL/INSTALLATION»(ref-343797-S02687149412009101500000) .)
2. Remove the heater core from the A/C unit.
3. Inspect for cracks, damage, and coolant leakage. If any problems are found, replace the heater core.
4. Inspect for bent fins. If any are bent, use a flathead screwdriver to straighten them.
5. Verify that the heater core inlet and outlet pipe are not distorted or damaged. Repair with pliers if necessary.

Scheme 57

1. Disconnect the negative battery cable.
2. Remove the following parts: Front seat (See «FRONT SEAT REMOVAL/INSTALLATION»(ref-343794-S19995616382009101500000) ). Car-navigation unit (With car-navigation system) (See «CAR-NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-343789-S25353956672009101500000) ). Front scuff plate inner (See «FRONT SCUFF PLATE REMOVAL/INSTALLATION»(ref-343786-S38441409102009101500000) ). Front side trim (See «FRONT SIDE TRIM REMOVAL/INSTALLATION»(ref-343786-S15930681492009101500000) ). Console panel (See «CONSOLE REMOVAL/INSTALLATION»(ref-343786-S27142773812009101500000) ). Console (See «CONSOLE REMOVAL/INSTALLATION»(ref-343786-S27142773812009101500000) ).
3. Turn over the floor covering. (See «FLOOR COVERING REMOVAL/INSTALLATION»(ref-343786-S20611896042009101500000) ).
4. Remove in the order indicated in the table.
5. Install in the reverse order of removal.

Scheme 58

1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See «REFRIGERANT RECOVERY»(ref-343798-S38038311702009101500000) .) (See «REFRIGERANT CHARGING»(ref-343798-S00570161812009101500000) ).
3. Remove the splash shield.
4. Loosen the drive belt and remove it. CAUTION: If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and abnormal noise will occur. Always immediately plug open fittings after removing any refrigeration cycle parts to keep moisture or foreign material out of the cycle.
5. Remove in the order indicated in the table. Do not allow compressor oil to spill.
6. Install in the reverse order of removal.
7. Install the drive belt. (See «DRIVE BELT REMOVAL/INSTALLATION[L3 WITH TC]»(ref-343774-S21935724792009101500000) ).
8. Perform the refrigerant system performance test. (See «REFRIGERANT SYSTEM PERFORMANCE TEST»(ref-343798-S08047576452009101500000) ).

CONDENSER INSPECTION

1. Inspect for cracks, damage, and oil leakage. If any are found, replace the condenser.
2. Inspect for fins clogged by dust. If any are clogged, remove the dust from the fins.
3. Inspect for bent fins. If any are bent, use a flathead screwdriver to straighten them.

Scheme 59

1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See «REFRIGERANT RECOVERY»(ref-343798-S38038311702009101500000) .) (See «REFRIGERANT CHARGING»(ref-343798-S00570161812009101500000) ).
3. Remove the front bumper. (See «FRONT BUMPER REMOVAL/INSTALLATION»(ref-343787-S10990257842009101500000) ).
4. Remove the oil cooler. (See «OIL COOLER REMOVAL/INSTALLATION[L3 WITH TC]»(ref-343776-S25451291952009101500000) ). CAUTION: If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and abnormal noise will occur. Always immediately plug all open fittings after removing any refrigeration cycle parts to keep moisture or foreign material out of the cycle.
5. Remove the receiver/drier. Do not allow compressor oil to spill. (See «RECEIVER/DRIER REMOVAL NOTE»(ref-343797-S37288598152009101500000) .)
6. Install in the reverse order of removal. (See «RECEIVER/DRIER INSTALLATION NOTE»(ref-343797-S33357489552009101500000) .)
7. Perform the refrigerant system performance test. (See «REFRIGERANT SYSTEM PERFORMANCE TEST»(ref-343798-S08047576452009101500000) ).

Scheme 60

1. Disconnect the block joint type pipes by grasping female side of the block with hand and holding firmly, then tighten the connection bolt.

Scheme 61

1. Tighten the bolt of joint by hand.
2. Tighten the joint to the specified torque.
3. Connect the block joint type pipe by grasping the female side of the block with hand holding firmly, then tighten the connection bolt.

Scheme 62

1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See «REFRIGERANT RECOVERY»(ref-343798-S38038311702009101500000) .) (See «REFRIGERANT CHARGING»(ref-343798-S00570161812009101500000) ).
3. Disconnect the body earth cable installed to NO. 3 engine mount rubber.
4. Disconnect the insulator. (See «A/C UNIT REMOVAL/INSTALLATION»(ref-343797-S02687149412009101500000) .)
5. Remove in the order indicated in the table. Do not allow compressor oil to spill. CAUTION: If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and abnormal noise will occur. Always immediately plug all open fittings after removing any refrigeration cycle parts to keep moisture or foreign material out of the cycle.
6. Install in the reverse order of removal.
7. Perform the refrigerant system performance test. (See «REFRIGERANT SYSTEM PERFORMANCE TEST»(ref-343798-S08047576452009101500000) ).

Scheme 63

Scheme 64

Scheme 65

1. Set the SST.
2. While looking through the inspection hole of the SST , insert the protruding part of the SST until it makes contact with the cage section.
3. Use the SST to disconnect the male pipe or hose from the female by pulling the male pipe or hose. NOTE: The male pipe or hose can be disconnected easily from the female pipe by pulling from the male pipe or hose while maintaining the pressure of the protruding part of the SST.