Basic System (HVAC): Diagnosis Mazda 3 BL

CABIN AIR FILTER INSPECTION

1. Verify that there is no damage, excessive dirt, or abnormal odor on the cabin air filter. If there is any malfunction, replace the cabin air filter. NOTE: The cabin air filter cannot be reused by cleaning it with water or compressed air.

EVAPORATOR INSPECTION

1. Inspect the evaporator for damage, cracks, and oil leakage. If there is any malfunction, replace the evaporator.
2. Visually inspect the fins for bending. If there is any bending, use the end of a flathead screwdriver to straighten the fins.

HEATER CORE INSPECTION

1. Inspect the heater core for damage, cracks, and water leakage. If there is any malfunction, replace the heater core.
2. Visually inspect the fins for bending. If there is any bending, use the end of a flathead screwdriver to straighten the fins.
3. Visually inspect the heater hose for deformation. Repair with pliers if there is deformation. If there is any malfunction, replace the heater core.

Scheme 8

1. Disconnect the negative battery cable.
2. Detach the hood release lever from the lower panel. (See «HOOD LATCH AND RELEASE LEVER REMOVAL/INSTALLATION»(ref-345243-S34551921912009102000000) .)
3. Remove the front scuff plate (LH). (See «FRONT SCUFF PLATE REMOVAL/INSTALLATION»(ref-345251-S03552764762009102000000) .)
4. Remove the front side trim (LH). (See «FRONT SIDE TRIM REMOVAL/INSTALLATION»(ref-345251-S39582742522009102000000) .)
5. Remove the lower panel. (See «LOWER PANEL REMOVAL/INSTALLATION»(ref-345251-S05584420032009102000000) .)
6. Remove the shower duct (LH).
7. Remove the airflow mode actuator, (full-auto air conditioner) (See «AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION»(ref-345245-S14475301992009102000000) .)
8. Disconnect the airflow mode wire, (manual air conditioner) (See «CLIMATE CONTROL UNIT REMOVAL [MANUAL AIR CONDITIONER]»(ref-345245-S38064839052009102000000) .)
9. Remove the airflow mode rod.
10. Remove the airflow mode main link.
11. Install in the reverse order of removal.
12. Adjust the airflow mode wire, (manual air conditioner) (See «CLIMATE CONTROL UNIT WIRE ADJUSTMENT»(ref-345245-S26034471002009102000000) .)

CONDENSER INSPECTION

1. Inspect the condenser for cracks, damage, and oil leakage. If there is any malfunction, replace the condenser.
2. Visually inspect the fins for clogging of foreign material. If any fins are clogged, remove the foreign material.
3. Visually inspect the fins for bending. If there is any bending, use the end of a flathead screwdriver to straighten fins.

Scheme 9

1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See «REFRIGERANT RECOVERY»(ref-345268-S24871732642009102000000) .) (See «REFRIGERANT CHARGING»(ref-345268-S40252650632009102000000) .)
3. Remove the under cover. 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.
4. Remove the receiver/drier. Do not allow compressor oil to spill.
5. Install in the reverse order of removal.
6. Perform the refrigerant system performance test. (See «REFRIGERANT SYSTEM PERFORMANCE TEST»(ref-345268-S33795605272009102000000) .)

Scheme 10

1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See «REFRIGERANT CHARGING»(ref-345268-S40252650632009102000000) .)
3. Remove the P/S fluid reserve tank.
4. Remove the coolant reserve tank. (See «COOLANT RESERVE TANK REMOVAL/INSTALLATION [L3 WITH TC]»(ref-345232-S35242088912009102000000) .)
5. Remove the splash shield.
6. Remove the charge air cooler cover.
7. Remove the insulator.
8. 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.
9. Install in the reverse order of removal.
10. Perform the refrigerant system performance test. (See «REFRIGERANT SYSTEM PERFORMANCE TEST»(ref-345268-S33795605272009102000000) .)

Scheme 11

1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See «REFRIGERANT CHARGING»(ref-345268-S40252650632009102000000) .)
3. Remove the P/S fluid reserve tank.
4. Remove the coolant reserve tank. (See «COOLANT RESERVE TANK REMOVAL/INSTALLATION [LF, L3]»(ref-345218-S42516959732009102000000) .)
5. Remove the accelerator cable.
6. Remove the P/S fluid hose bracket.
7. Remove the under cover.
8. 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.
9. Install in the reverse order of removal.
10. Perform the refrigerant system performance test. (See «REFRIGERANT SYSTEM PERFORMANCE TEST»(ref-345268-S33795605272009102000000) .)

Scheme 12

1. Disconnect the block joint type pipes by grasping female side of the block with pliers or similar tool and holding firmly, then remove the connection bolt or nut.

Scheme 13

Scheme 14

Scheme 15

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.