Heater Unit/Core Replacement Acura ZDX I

Heater Unit/Core Replacement

SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ) and the precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or service.

Scheme 226

Scheme 227

Scheme 228

Scheme 229

Scheme 230

Scheme 231

Scheme 232

Scheme 233

1. Do the battery terminal disconnection procedure (see «BATTERY TERMINAL DISCONNECTION AND RECONNECTION»(/acura/zdx/i-2009-2013/remont/body-electrical/#battery) ).
2. Recover the refrigerant with a recovery/recycling/ charging station (see «REFRIGERANT RECOVERY»(/acura/zdx/i-2009-2013/remont/automatic-hvac-system/#climate-control__refrigerant-recovery) ).
3. Disconnect the A/C line from the evaporator core (see step 3 ).
4. When the engine is cool, drain the engine coolant from the radiator (see «COOLANT CHECK»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).
5. From under the hood, slide the hose clamps (A) back. Disconnect the inlet heater hose (B) and the outlet heater hose (C) from the heater unit. Note the layout of the hoses. Engine coolant will run out when the hoses are disconnected; drain it into a clean drip pan. Be sure not to let coolant spill on the electrical parts or the painted surfaces. If any coolant spills, rinse it off immediately.
6. Remove the mounting nut from the heater unit. Take care not to damage or bend the fuel lines or the brake lines.
7. Remove the dashboard (see «DASHBOARD/STEERING HANGER BEAM REMOVAL/INSTALLATION»(/acura/zdx/i-2009-2013/remont/gauges-instrument-panels/#dashboard) ).
8. Disconnect the right engine compartment wire harness connector (C201) (A). Remove the duct (B) and the drain hose (C). Then remove the mounting nuts and the blower-heater unit (D).
9. Disconnect the connector (A) from the blower motor. Detach the harness clips (B).
10. Disconnect these connectors (A): The passenger's mode control motor, the power transistor, and the passenger's air mix control motor. Detach the harness clips (B).
11. Disconnect these connectors (A): The recirculation control motor, and the climate control unit. Detach the harness clip (B).
12. Disconnect these connectors (A): the driver's air mix control motor, the driver's mode control motor, and evaporator temperature sensor. Detach the harness clips (B) and remove the wire harness (C).
13. Remove the self-tapping screws, the passenger's heater duct (A), the joint duct (B), the seal (C), and the heater core cover (D).
14. Remove the self-tapping screw, the heater pipe bracket (E), and the grommet (F), and carefully pull out the heater core (G).
15. Install the heater core in the reverse order of removal.
16. Install the heater unit in the reverse order of removal, and note these items: Do not interchange the inlet and outlet heater hoses, and install the hose clamps securely. Refill the cooling system with engine coolant (see «COOLANT CHECK»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ). Make sure that there is no coolant leakage. Charge the system (see «SYSTEM CHARGING»(/acura/zdx/i-2009-2013/remont/automatic-hvac-system/#climate-control__system-charging) ). Make sure that there is no air leakage. Make sure that there is no refrigerant leakage.
17. Do the battery terminal reconnection procedure (see «BATTERY TERMINAL DISCONNECTION AND RECONNECTION»(/acura/zdx/i-2009-2013/remont/body-electrical/#battery) ).

Scheme 234

Scheme 235

1. Remove the driver's dashboard undercover (see «DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION»(/acura/zdx/i-2009-2013/remont/gauges-instrument-panels/#dashboard) ).
2. Remove the self-tapping screws, the aspirator hose (A), and the driver's heater duct (B).
3. Disconnect the 7P connector (A) from the driver's air mix control motor (B). Remove the self-tapping screws and the driver's air mix control motor from the heater unit.
4. Make sure the air mix door and linkage move smoothly. Then install the motor in the reverse order of removal. Make sure the pin on the motor is properly engaged with the linkage. After installation, make sure the motor runs smoothly.

Scheme 236

Scheme 237

1. Remove the passenger's dashboard undercover (see «GLOVE BOX DAMPER REPLACEMENT»(/acura/zdx/i-2009-2013/remont/gauges-instrument-panels/#dashboard__glove-box-damper-replacement) ).
2. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/zdx/i-2009-2013/remont/gauges-instrument-panels/#dashboard__glove-box-removalinstallation) ).
3. Detach the harness clip (A), then remove the self-tapping screws and the passenger's heater duct
4. Disconnect the 5P connector (A) from the power transistor, and the 7P connector (B) from the passenger's air mix control motor (C). Remove the self-tapping screws and the passenger's air mix control motor from the heater unit.
5. Make sure the air mix door and linkage move smoothly. Then install the motor in the reverse order of removal. Make sure the pin on the motor is properly engaged with the linkage. After installation, make sure the motor runs smoothly.

Scheme 238

1. Remove the driver's dashboard undercover (see «DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION»(/acura/zdx/i-2009-2013/remont/gauges-instrument-panels/#dashboard) ).
2. Disconnect the 7P connector (A) from the driver's mode control motor (B). Remove the self-tapping screws and the driver's mode control motor from the heater unit.
3. Install the motor in the reverse order of removal. Make sure the pin on the motor is properly engaged with the linkage. After installation, make sure the motor runs smoothly.