Basic System (HVAC): Diagnosis Mazda CX-9 I

AIR FILTER INSPECTION

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

FRONT EVAPORATOR INSPECTION

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

FRONT HEATER CORE INSPECTION

1. Inspect the front heater core for damage, cracks, and water leakage. If there is any malfunction, replace the front 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 front heater core.

Scheme 116

1. Disconnect the negative battery cable.
2. Remove the following parts: Front seat. See «FRONT SEAT REMOVAL/INSTALLATION»(ref-345332-S32794888832009102000000) . Front scuff plate inner. See «FRONT SCUFF PLATE REMOVAL/INSTALLATION»(ref-345331-S00212993842009102000000) . Front side trim. See «FRONT SIDE TRIM REMOVAL/INSTALLATION»(ref-345331-S41141327992009102000000) . Decoration panel. See «DECORATION PANEL REMOVAL/INSTALLATION»(ref-345331-S31374414672009102000000) . Front console box mat. See «FRONT CONSOLE BOX MAT REMOVAL/INSTALLATION»(ref-345331-S10485313842009102000000) . Indicator panel. See «INDICATOR PANEL REMOVAL/INSTALLATION»(ref-345331-S24413902932009102000000) . Front console box. See «FRONT CONSOLE BOX REMOVAL/INSTALLATION»(ref-345331-S18733072432009102000000) . Dashboard under cover. See «DASHBOARD UNDER COVER REMOVAL/INSTALLATION»(ref-345331-S05761886132009102000000) . Side wall. See «SIDE WALL REMOVAL/INSTALLATION»(ref-345331-S28735626472009102000000) . Console panel. See «CONSOLE PANEL REMOVAL/INSTALLATION»(ref-345331-S12921188482009102000000) . Console cover. See «CONSOLE COVER REMOVAL/INSTALLATION»(ref-345331-S33051633072009102000000) . Console. See «CONSOLE REMOVAL/INSTALLATION»(ref-345331-S33017209812009102000000) . Dust cover. See «STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION»(ref-345338-S02652016412009102000000) .
3. Turn floor covering over. See «FLOOR COVERING REMOVAL/INSTALLATION»(ref-345331-S23643634902009102000000) .
4. Remove in the order indicated in the table.
5. Install in the reverse order of removal.

Scheme 117

1. Disconnect the negative battery cable.
2. Remove the following parts: Decoration panel. See «DECORATION PANEL REMOVAL/INSTALLATION»(ref-345331-S31374414672009102000000) . Front console box mat. See «FRONT CONSOLE BOX MAT REMOVAL/INSTALLATION»(ref-345331-S10485313842009102000000) . Indicator panel. See «INDICATOR PANEL REMOVAL/INSTALLATION»(ref-345331-S24413902932009102000000) . Front console box. See «FRONT CONSOLE BOX REMOVAL/INSTALLATION»(ref-345331-S18733072432009102000000) . Dashboard under cover. See «DASHBOARD UNDER COVER REMOVAL/INSTALLATION»(ref-345331-S05761886132009102000000) . Side wall. See «SIDE WALL REMOVAL/INSTALLATION»(ref-345331-S28735626472009102000000) . Console panel. See «CONSOLE PANEL REMOVAL/INSTALLATION»(ref-345331-S12921188482009102000000) . Console cover. See «CONSOLE COVER REMOVAL/INSTALLATION»(ref-345331-S33051633072009102000000) . Console. See «CONSOLE REMOVAL/INSTALLATION»(ref-345331-S33017209812009102000000) . Second-row seat. See «SECOND-ROW SEAT REMOVAL/INSTALLATION»(ref-345332-S34911736442009102000000) . Edge cover. See «LONG SLIDER REMOVAL/INSTALLATION»(ref-345332-S22077081622009102000000) . Long slider cover. See «LONG SLIDER REMOVAL/INSTALLATION»(ref-345332-S22077081622009102000000) . Third-row seat. See «THIRD-ROW SEAT REMOVAL/INSTALLATION»(ref-345332-S37062980262009102000000) . Trunk box. See «TRUNK BOX REMOVAL/INSTALLATION»(ref-345331-S28817313762009102000000) . Seat side box. See «SEAT SIDE BOX REMOVAL/INSTALLATION»(ref-345331-S04400711882009102000000) . Trunk end trim. See «TRUNK END TRIM REMOVAL/INSTALLATION»(ref-345331-S25003096482009102000000) . Third-row seat. See «THIRD-ROW SEAT REMOVAL/INSTALLATION»(ref-345332-S37062980262009102000000) . Rear scuff plate inner. See «REAR SCUFF PLATE REMOVAL/INSTALLATION»(ref-345331-S02668570962009102000000) . Third-row seat belt lower anchor installation bolt. See «THIRD-ROW SEAT BELT REMOVAL/INSTALLATION»(ref-345333-S30110355222009102000000) . Trunk side trim. See «TRUNK SIDE TRIM REMOVAL/INSTALLATION»(ref-345331-S20889935252009102000000) .
3. Remove the two rear A/C unit retaining bolts on the rear side.
4. Turn floor covering over. See «FLOOR COVERING REMOVAL/INSTALLATION»(ref-345331-S23643634902009102000000) .
5. Remove the long slider. See «LONG SLIDER REMOVAL/INSTALLATION»(ref-345332-S22077081622009102000000) .
6. Remove the fasteners.
7. Lift the rear side of the rear A/C unit and remove the rear heater duct No. 2.
8. Remove the rear heat duct No. 3.
9. Remove the rear heat duct No. 4.
10. Install in the reverse order of removal.

Scheme 118

Scheme 119

1. Disconnect the negative battery cable.
2. Remove the following parts: Second-row seat (LH). See «SECOND-ROW SEAT REMOVAL/INSTALLATION»(ref-345332-S34911736442009102000000) . Edge cover. See «LONG SLIDER REMOVAL/INSTALLATION»(ref-345332-S22077081622009102000000) . Long slider cover. See «LONG SLIDER REMOVAL/INSTALLATION»(ref-345332-S22077081622009102000000) .
3. Cut away the floor covering as shown in the figure. NOTE: The cut part does not need to match up when installing the floor covering.
4. Turn floor covering over.
5. Remove the rear heat duct No. 3.
6. Install in the reverse order of removal.

Scheme 120

Scheme 121

1. Disconnect the negative battery cable.
2. Remove the following parts: Second-row seat (RH). See «SECOND-ROW SEAT REMOVAL/INSTALLATION»(ref-345332-S34911736442009102000000) . Edge cover. See «LONG SLIDER REMOVAL/INSTALLATION»(ref-345332-S22077081622009102000000) . Long slider cover. See «LONG SLIDER REMOVAL/INSTALLATION»(ref-345332-S22077081622009102000000) .
3. Cut away the floor covering as shown in the figure. NOTE: The cut part does not need to match up when installing the floor covering.
4. Turn floor covering over.
5. Remove the rear heat duct No. 4.
6. Install in the reverse order of removal.

Scheme 122

1. Disconnect the negative battery cable.
2. Remove the console cover. See «CONSOLE COVER REMOVAL/INSTALLATION»(ref-345331-S33051633072009102000000) .
3. Remove the screws.
4. Remove the rear cooler duct.
5. Install in the reverse order of removal.

Scheme 123

Scheme 124

Scheme 125

1. Disconnect the negative battery cable.
2. Evacuate the refrigerant from the system. See «REFRIGERANT RECOVERY»(ref-345382-S00955957562009102000000) . See «REFRIGERANT CHARGING»(ref-345382-S20015181932009102000000) .
3. Drain the engine coolant. See «ENGINE COOLANT REPLACEMENT [MZI-3.7]»(ref-345349-S00631216152009102000000) .
4. Remove the following parts: Decoration panel. See «DECORATION PANEL REMOVAL/INSTALLATION»(ref-345331-S31374414672009102000000) . Front console box mat. See «FRONT CONSOLE BOX MAT REMOVAL/INSTALLATION»(ref-345331-S10485313842009102000000) . Indicator panel. See «INDICATOR PANEL REMOVAL/INSTALLATION»(ref-345331-S24413902932009102000000) . Front console box. See «FRONT CONSOLE BOX REMOVAL/INSTALLATION»(ref-345331-S18733072432009102000000) . Side wall. See «SIDE WALL REMOVAL/INSTALLATION»(ref-345331-S28735626472009102000000) . Dashboard under cover (Passenger side). See «DASHBOARD UNDER COVER REMOVAL/INSTALLATION»(ref-345331-S05761886132009102000000) . Console panel. See «CONSOLE PANEL REMOVAL/INSTALLATION»(ref-345331-S12921188482009102000000) . Console cover. See «CONSOLE COVER REMOVAL/INSTALLATION»(ref-345331-S33051633072009102000000) . Console. See «CONSOLE REMOVAL/INSTALLATION»(ref-345331-S33017209812009102000000) . Selector lever component. See «SELECTOR LEVER COMPONENT REMOVAL/INSTALLATION»(ref-345341-S00995522882009102000000) .
5. Remove the bolt.
6. Remove the rear cooler pipe No. 1. 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 open fittings after removing any refrigeration cycle parts to keep moisture or foreign material out of the cycle.
7. Jack up the vehicle.
8. Remove the hose clip.
9. Remove the rear heater hose No. 1 and No. 2.
10. Remove in the order indicated in the table
11. Install in the reverse order of removal.
12. Perform the refrigerant system performance test. (See «REFRIGERANT SYSTEM PERFORMANCE TEST»(ref-345382-S20017527322009102000000) .

Scheme 126

1. Disassemble in the order indicated in the table.
2. Assemble in the reverse order of disassembly.

REAR EVAPORATOR INSPECTION

1. Inspect for cracks, damage, and oil leakage. If any are found, replace the rear evaporator.
2. Inspect for bent fins. If any are bent, use a flathead screwdriver to straighten them.

REAR HEATER CORE INSPECTION

1. Inspect for cracks, damage, and coolant leakage. If any are found, replace the rear heater core.
2. Inspect for bent fins. If any are bent, use a flathead screwdriver to straighten them.
3. Verify that the rear heater core inlet and "outlet are not distorted or damaged. If they are distorted or damaged, repair then using pliers.

Scheme 127

1. Disconnect the negative battery cable.
2. Discharge the refrigerant. See «REFRIGERANT CHARGING»(ref-345382-S20015181932009102000000) .
3. Remove the drive belt. See «DRIVE BELT REMOVAL/INSTALLATION [MZI-3.7]»(ref-345346-S18582268582009102000000) .
4. Remove the front cooler hose (Hi). See «REFRIGERANT LINE REMOVAL/INSTALLATION»(ref-345376-S13106311512009102000000) .
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 or other malfunction could occur. Always plug open fittings immediately after removing any refrigeration cycle parts.
6. Install in the reverse order of removal.
7. Perform the refrigerant system performance test. See «REFRIGERANT SYSTEM PERFORMANCE TEST»(ref-345382-S20017527322009102000000) .

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 128

Scheme 129

1. Remove the battery. See «BATTERY REMOVAL/INSTALLATION [MZI-3.7]»(ref-345358-S08633229842009102000000) .
2. Drain the engine coolant. See «ENGINE COOLANT REPLACEMENT [MZI-3.7]»(ref-345349-S00631216152009102000000) .
3. Remove the following parts: Windshield wiper arm and blade. See «WINDSHIELD WIPER ARM AND BLADE REMOVAL/INSTALLATION»(ref-345367-S20259665782009102000000) . Cowl grille See «COWL GRILLE REMOVAL/INSTALLATION»(ref-345340-S17876884912009102000000) . Windshield wiper motor. See «WINDSHIELD WIPER MOTOR REMOVAL/INSTALLATION»(ref-345367-S10993438382009102000000) . Cowl panel. See «COWL PANEL REMOVAL/INSTALLATION»(ref-345365-S22373951532009102000000) .
4. Remove in the order indicated in the table.
5. Jack up the vehicle.
6. Under guard (LH). See «CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE, AIR FILTER COMPONENT REMOVAL/INSTALLATION [MZI-3.7]»(ref-345354-S05400050562009102000000) )
7. Install in the reverse order of removal.
8. Inspect for engine coolant leakage. See «ENGINE COOLANT LEAKAGE INSPECTION [MZI-3.7]»(ref-345349-S10451290312009102000000) .

Scheme 130

1. Insert the heater pipe into the heater hose until the hose reaches the bracket or the protrusion on the pipe.
2. When the rear heater pipe is removed, bleed the air from the rear heater pipe thoroughly after refilling the engine coolant to prevent air from being trapped in the rear heater pipe.

Scheme 131

Scheme 132

Scheme 133

Scheme 134

1. Disconnect the negative battery cable.
2. Discharge the refrigerant. See «REFRIGERANT CHARGING»(ref-345382-S20015181932009102000000) .
3. Drain the engine coolant. See «ENGINE COOLANT REPLACEMENT [MZI-3.7]»(ref-345349-S00631216152009102000000) .
4. Remove the following parts: Windshield wiper arm and blade. See «WINDSHIELD WIPER ARM AND BLADE REMOVAL/INSTALLATION»(ref-345367-S20259665782009102000000) . Cowl grille. See «COWL GRILLE REMOVAL/INSTALLATION»(ref-345340-S17876884912009102000000) . Windshield wiper motor. See «WINDSHIELD WIPER MOTOR REMOVAL/INSTALLATION»(ref-345367-S10993438382009102000000) . Cowl panel. See «COWL PANEL REMOVAL/INSTALLATION»(ref-345365-S22373951532009102000000) . Air cleaner and fresh air duct component. See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-3.7]»(ref-345348-S33859003282009102000000) . Cooling fan component. See «COOLING FAN COMPONENT REMOVAL/INSTALLATION [MZI-3.7]»(ref-345349-S27636255672009102000000) .
5. Disconnect the ATF oil cooler hose from the radiator.
6. Remove the radiator. See «RADIATOR REMOVAL/INSTALLATION [MZI-3.7]»(ref-345349-S14550150072009102000000) .
7. Remove the condenser. See «CONDENSER REMOVAL/INSTALLATION»(ref-345376-S09361013292009102000000) .
8. Remove the coolant reserve tank retaining bolts and move the coolant reserve tank.
9. Remove the power steering oil pump retaining bolt and nut and move the power steering oil pump. See «POWER STEERING OIL PUMP REMOVAL/INSTALLATION»(ref-345338-S07129672902009102000000) .
10. Do not allow remaining compressor oil in the piping and connecting parts to spill, and remove in the order indicated in the table. 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.
11. Remove the following parts, depending on rear cooler pipe to be removed. Decoration panel. See «DECORATION PANEL REMOVAL/INSTALLATION»(ref-345331-S31374414672009102000000) . Front console box mat. See «FRONT CONSOLE BOX MAT REMOVAL/INSTALLATION»(ref-345331-S10485313842009102000000) . Indicator panel. See «INDICATOR PANEL REMOVAL/INSTALLATION»(ref-345331-S24413902932009102000000) . Front console box. See «FRONT CONSOLE BOX REMOVAL/INSTALLATION»(ref-345331-S18733072432009102000000) . Dashboard under cover. See «DASHBOARD UNDER COVER REMOVAL/INSTALLATION»(ref-345331-S05761886132009102000000) . Side wall. See «SIDE WALL REMOVAL/INSTALLATION»(ref-345331-S28735626472009102000000) . Console panel. See «CONSOLE PANEL REMOVAL/INSTALLATION»(ref-345331-S12921188482009102000000) . Console cover. See «CONSOLE COVER REMOVAL/INSTALLATION»(ref-345331-S33051633072009102000000) . Console. See «CONSOLE REMOVAL/INSTALLATION»(ref-345331-S33017209812009102000000) . Front seat (passenger side). See «FRONT SEAT REMOVAL/INSTALLATION»(ref-345332-S32794888832009102000000) . Bolt Screws Rear cooler pipe No. 1 bracket.
12. Jack up the vehicle.
13. Remove the nuts and disconnect the presilencer and middle pipe.
14. Disconnect the rubber hanger.
15. Remove the bolts and presilencer insulator.
16. Remove the bolts.
17. Remove the nut and fastener.
18. Remove the under guard (RH).
19. Remove the transverse member retaining bolts and set the transverse member out of the way. See «TRANSVERSE MEMBER REMOVAL/INSTALLATION»(ref-345372-S08708950082009102000000) .
20. Remove the bolt.
21. Remove the clip.
22. Disconnect rear cooler pipe No. 1 and remove rear cooler pipes No. 2 and No. 1.
23. Install in the reverse order of removal.
24. Inspect for engine coolant leakage. See «ENGINE COOLANT LEAKAGE INSPECTION [MZI-3.7]»(ref-345349-S10451290312009102000000) .
25. Inspect the ATF level. See «AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [AW6A-EL, AW6AX-EL]»(ref-345375-S33035555352009102000000) .
26. Perform the refrigerant system performance test. See «REFRIGERANT SYSTEM PERFORMANCE TEST»(ref-345382-S20017527322009102000000) .

Scheme 135

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

Scheme 136

1. Temporarily tighten the joint bolt by hand.
2. Connect the block joint type pipes by grasping the female side of the block with pliers or similar tool and holding firmly, and then tighten the connection bolt or nut with a torque wrench.