REPLACEMENT
- Disconnect the negative (-) battery terminal.
- Remove the crash pad. Refer to «CRASH PAD»(ref-278816-S11302877372008020400000).
- Loosen 2 screws and then remove the humidity sensor (A). see scheme 27: Identifying Humidity Sensor
- Installation is the reverse order of removal.
Identifying Heater Unit Components (1 Of 2). Scheme 145
Scheme 145: Identifying Heater Unit Components (1 Of 2)
Identifying Heater Unit Components (2 Of 2). Scheme 146
Scheme 146: Identifying Heater Unit Components (2 Of 2)
Scheme 147
Scheme 148
Scheme 149
Scheme 150
- Disconnect the negative (-) battery terminal.
- Recover the refrigerant with a recovery/ recycling/ charging station.
- When the engine is cool, drain the engine coolant from the radiator.
- Remove the bolts (A) and the expansion valve (B) from the evaporator core. Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination. (Scheme 147): Identifying Expansion Valve
- Disconnect the inlet (C) and outlet (D) heater hoses from the heater unit. (Scheme 148): Identifying Inlet And Outlet Heater Hoses CAUTION: 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 electrical parts or painted surfaces. If any coolant spills, rinse it off immediately.
- Remove the crash pad. Refer to «CRASH PAD»(ref-278816-S11302877372008020400000).
- Remove the cowl cross bar assembly. Refer to «CRASH PAD»(ref-278816-S11302877372008020400000).
- Disconnect the connectors from the temperature control actuator, the mode control actuator and the evaporator temperature sensor.
- Remove the heater & blower unit after loosening 7 mounting nuts. (Scheme 149): Identifying Heater & Blower Unit Mounting Nuts
- Remove the heater core (B) after remove the cover (A). (Scheme 150): Identifying Heater Core And Cover
- Installation is the reverse order of removal, and note these items: If you're installing a new evaporator, add refrigerant oil (ND-OIL8). Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing them. Be sure to use the right O-rings for R-134a to avoid leakage. Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption. Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil contacts the paint, wash it off immediately Apply sealant to the grommets. Make sure that there is no air leakage. Charge the system and test its performance. Do not interchange the inlet and outlet heater hoses and install the hose clamps securely. Refill the cooling system with engine coolant.
Identifying Temperature Control Actuator Components. Scheme 151
Scheme 151: Identifying Temperature Control Actuator Components
- Disconnect the negative (-) battery terminal.
- Remove the driver's crash pad lower panel. Refer to «CRASH PAD»(ref-278816-S11302877372008020400000).
- Disconnect the mode control actuator connector (A) after removing the air duct.
- Loosen the mounting screws and then remove the mode control actuator (B). see scheme 41: Identifying Mounting Screws
- Installation is the reverse order of removal.
Exploded View Of Blower Unit Components. Scheme 152
Scheme 152: Exploded View Of Blower Unit Components
Scheme 153
Scheme 154
Scheme 155
- Disconnect the negative (-) battery terminal.
- Remove the crash pad. Refer to «CRASH PAD»(ref-278816-S11302877372008020400000).
- Remove the cowl cross bar assembly. Refer to «CRASH PAD»(ref-278816-S11302877372008020400000).
- Remove the evaporator & blower unit.
- Disconnect the connectors from the intake actuator, the blower motor and power mosfet. (Scheme 153): Identifying Blower Unit
- Remove the intake duct assemble (A) from the heater unit after loosening a mounting bolt and 4 screws. (Scheme 154): Identifying Heater Unit Screws NOTE: Make sure that there is no air leaking out of the blower and duct joints.
- Remove the lower case (A) from the evaporator & blower unit assembly after unscrewing 8 screws. (Scheme 155): Identifying Lower Case
- Remove the evaporator core (A). (Scheme 156): Identifying Evaporator Core
- Installation is the reverse order of removal.
Scheme 156
- Connect the battery voltage and check the blower motor rotation. (Scheme 157): Checking Blower Motor Rotation
- If the blower motor voltage is not operated well, substitute with a known-good blower motor and check for proper operation.
- If the problem is corrected, replace the blower motor.
Scheme 157
- Disconnect the negative (-) battery terminal.
- Disconnect the connector of the blower motor.
- Remove the blower motor (A) after loosening the mounting screws. (Scheme 158): Identifying Blower Motor
- installation is the reverse order of removal.
Scheme 158
- Ignition "ON"
- Manually operate the control switch and measure the voltage of blower motor.
- Select the control switch to raise voltage until high speed. (Scheme 159): Inspecting Power Mosfet [SPECIFICATION] MOTOR VOLTAGE SPECIFICATIONS Fan Motor Voltage Manual AUTO First speed 4.0 ± 0.5 4.50-4.79 Second speed 5.0 ± 0.5 4.80-5.79 Third speed 6.2 ± 0.5 5.80-6.89 Fourth speed 7.4 ± 0.5 6.90-8.09 Fifth speed 8.6 ± 0.5 8.10-9.29 Sixth speed 9.8 ± 0.5 9.30-10.49 Seventh speed 11.0 ± 0.5 10.50-11.99 eighth speed Battery (+) Battery (+)
- If the measured voltage is not specification, substitute with a known-good power mosfet and check for proper operation.
- If the problem is corrected, replace the power mosfet.
Scheme 159
- Disconnect the negative (-) battery terminal.
- Remove the crash pad.
- Disconnect the power mosfet connector (A).
- Remove the power mosfet (B) after loosening the mounting screws. see scheme 50: Identifying Power Mosfet
- Installation is the reverse order of removal.
- Disconnect the negative (-) battery terminal.
- Remove the side garnish (A). see scheme 65: Identifying Side Garnish
- After loosening the heater control mounting screw, remove the heater control unit (A). see scheme 66: Identifying Heater Control Unit
- After disconnect the connector (A), remove the heater control unit (B). see scheme 67: Identifying Heater Control Unit
- Installation is the reverse order of removal.
Identifying Humidity Sensor. Scheme 160
Scheme 160: Identifying Humidity Sensor