HEATER, AIR CONDITIONING AND VENTILATION
Content
55-1
GROUP 55
HEATER, AIR CONDITIONING AND VENTILATION
CONTENTS
GENERAL DESCRIPTION. . . . . . . . . HEATER AND AIR CONDITIONING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . HEATER CONTROL . . . . . . . . . . . . . A/C-ECU. . . . . . . . . . . . . . . . . . . . . . . 55-2 55-6 DUCT. . . . . . . . . . . . . . . . . . . . . . . . . . 55-8 VENTILATION SYSTEM. . . . . . . . . . . 55-9 55-12 55-11 A/C COMPRESSOR . . . . . . . . . . . . . . CONDENSER . . . . . . . . . . . . . . . . . . . 55-10 55-11
55-2
HEATER, AIR CONDITIONING AND VENTILATION
GENERAL DESCRIPTION
GENERAL DESCRIPTION
The new HVAC unit integrates blower, and evaporator, it increases the air flow but reduces air flow resistance and air flow noise.
M2551001500084
ENHANCEMENT IN SAFETY
• A/C system will shut down automatically if the air bags are open. • Crushable space has been adopted into HVAC unit to reduce the risk of passenger injuries if a collision occurred.
.
FEATURES
.
ENHANCEMENTS IN COMFORT
• With the adoption of automatic A/C system, the air inlets (fresh air/recirculation air), the vents, temperature at the vents and fan speed are automatically controlled according to the outside temperature and cabin temperature so that the optimum air conditioning is achieved. • By the adoption of clean air filter, the air quality in the cabin has been kept.
.
GLOBAL ENVIRONMENT PROTECTION
• New refrigerant system (HFC134a) has been adopted. • Clean air filter media and its cover are separated to reduce waste materials, when replacing the filter.
.
ENHANCEMENTS IN SERVICE QUALITY
• Reduction of refrigerant gas leakage and enhancement in serviceability by incorporating condenser and receiver • Clean air filter is installed to the backside of glove box to facilitate the filter replacement.
.
ENHANCEMENTS IN OPERATION PERFORMANCE
• Operability has been enhanced by the adoption of large triple dial. • Customize function has been added for the enhanced convenience.
.
ENHANCEMENTS IN RESPONSIBILITY
Reliable information transmission is achieved by connecting A/C-ECU and each ECU via CAN communication.
ENHANCEMENTS IN FUEL ECONOMY
• The high efficiency compressor with a 2-step and the oil separator has reduced A/C system workload, thus enhancing the fuel economy. • The idle-up speed is controlled in two steps to secure the air cooling performance during summer and to enhance the fuel economy in the moderate seasons. • The cooling fan control depending on the refrigerant pressure and on the vehicle speed reduce alternator load, thus enhancing the fuel economy.
.
SPECIFICATIONS
ITEM Air conditioning switch type Compressor type Cooling output Heating output Refrigerant Type Charge quantity g (oz.) SPECIFICATION Rotary type MSC90CAS 5.5 kw 5.7 kw R134a (HFC-134a) 480 - 520 (16.9 - 18.3)
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
GENERAL DESCRIPTION
55-3
CONSTRUCTION DIAGRAM
Ambient air temperature sensor
Interior temperature sensor
AC608755AD
AC608760AB
Low-pressure side valve High-pressure side valve Suction flexible hose Liquid pipe Heater unit
A/C pressure sensor
Discharge flexible hose Condenser A/C compressor
AC708434AC
TSB Revision
55-4
HEATER, AIR CONDITIONING AND VENTILATION
GENERAL DESCRIPTION
A/C control panel
A/C-ECU
AC708612
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
GENERAL DESCRIPTION
55-5
COMMUNICATION
Outside/Inside air selection damper control motor Fin thermo sensor Air mixing damper control motor A/C pressure sensor Mode selection damper control motor Interior temperature sensor
A/C-ECU
Power transistor
Photo sensor Blower motor
SERIAL communication
A/C control panel
Combination meter
SRS-ECU
Engine-ECU ETACS-ECU
CAN communication
Ambient air temperature sensor : Interactive communication
AC705259AB
TSB Revision
55-6
HEATER, AIR CONDITIONING AND VENTILATION
HEATER AND AIR CONDITIONING SYSTEM
HEATER AND AIR CONDITIONING SYSTEM
HEATER UNIT ASSEMBLY
Mode selection damper control motor Outside / inside air selection damper control motor
M2551001000669
Intake duct Air thermo sensor
Power transistor
Air mixing damper control motor
Blower case
A/C-ECU
Blower motor
AC607858AB
Heater unit Mode selection damper Evaporator
Air mixing damper
Intake duct
Outside / inside air selection damper
Blower case Heater core
Clean air filter
AC607857AB
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
HEATER AND AIR CONDITIONING SYSTEM
55-7
The following new unit integrated blower, heater and evaporator to increase the air flow, reduce noise, and enhanced cooler and heater performance; • Integrated heater/cooling unit has been adopted for large air flows and low noise. • Crushable space has been secured to reduce the risk of passenger injuries. • Air mix damper that is also used as a reheating prevention damper has been adopted to enhance the air cooling performance. • The A/C condensate water outlet (drain port) has been installed to behind the evaporator to restrain the clogging of drain by foreign materials. • The outlet air temperature of the defroster has been set lower than that of foot to prevent overheating the driver’s face.
• Fin thermo sensor to directly measure evaporator temperature reduces occurrence risk of an evaporator freeze which will lead to the compressor lock. • Clean air filter has been introduced as standard to protect the unit from the intrusion of foreign materials (fallen leaves and others). and, it removes the pollen and dust, and enhances the air quality inside the passenger compartment. • Clean air filter media and cover have been separated to reduce the waste material amount generated during the filter replacement. • The installation position of clean air filter has been set to the backside of glove box to facilitate the filter replacement operation. And, the one-touch tab structure has been adopted for the cover installation to enable the replacement operation without tools.
OPERATION CRUSHABLE SPACE
Front defroster Side defroster Side defroster Side outlet Center outlet Side outlet Heater core Clean air filter Heater outlet Blower motor Evaporator
.
Crushable space Crushable space Front side
Recirculation Fresh
Heater outlet to compartment AC506490AB
Evaporator Drain port
Heater core
AC506491AB
The evaporator and heater core has been longitudinally installed in the vehicle length, and the crushable space has been adopted so that the structure absorbs the impact and reduces the risk of passenger injuries, if a collision occurred.
TSB Revision
55-8
HEATER CONTROLLER
.
HEATER, AIR CONDITIONING AND VENTILATION
HEATER CONTROL
HEATER CONTROL
M2551000900584
<Vehicles for USA> Outside/Inside air selection switch Rear window defogger switch A/C switch
<Vehicles for CANADA> Outside/Inside air selection switch Rear window defogger switch
A/C switch
AC608069
AC608068
Blower knob Temperature adjustment knob Mode selection knob Temperature adjustment knob
Blower knob Mode selection knob
AC708613AB
The features of the heater controller described below have been designed for better appearance, easier operation, and enhanced visibility. • Each dial for the air outlet switching, fan volume control, and temperature adjustment has been enlarged to enhance operability. • Ring lights have been adopted to inside the dials to enhance appearance during nighttime.
• AUTO and OFF positions of the fan volume control dial have been exchanged with one another. This change prevents the dial to pass the AUTO position when the fan volume control is turned OFF, and eliminates the necessity of manual reselection when switching the inside/outside air selection manually, thus enhancing the operability. • When the air outlet switching dial and fan volume control dial are turned to the AUTO position, the A/C switch has been made to automatically turn ON to enhance convenience. (Using the customize function, this function can be cancelled. Refer to P.55-9.)
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
A/C-ECU
55-9
M2551001200403
A/C-ECU
CONTROL
. .
IDLE-UP CONTROL
A/C-ECU and the engine ECU communicate with each other through the CAN communication. The idle-up speed of the engine is controlled in two steps depending on the A/C load to secure the air cooling performance during summer and to enhance fuel economy in moderate seasons moderate.
.
FORCED DEF CONTROL
When air outlet position is switched to DEF, A/C is automatically turned ON, and outside/inside air selection damper is set to the fresh air position to quickly defrost the windshield screen.
.
OUTLET AIR TEMPERATURE CONTROL
The engine coolant and evaporator temperature have been additionally calibrated to stabilize the temperature at vents and improve A/C controllability.
.
DETECTION CONTROL FOR REFRIGERANT LEAKS
A/C-ECU determines if the refrigerant amount is less than specified or refrigerant pressure is abnormal by using the ambient temperature (ambient temperature sensor to measure refrigerant inflation rate) and refrigerant pressure (measured by the A/C pressure sensor). When refrigerant amount or refrigerant pressure is judged abnormal, the compressor is cut-off to protect the A/C system. NOTE: When abnormality occurs, the A/C indicator flashes.
.
COOLING FAN SPEED CONTROL
According to the refrigerant pressure and the vehicle speed, the cooling fan speed is controlled to reduce the exterior noise and the load of the generator for fuel economy.
.
MAX COOL, MAX HOT CONTROL
When the set temperature is at 18.0 °C <61°F> (MAX COOL) or at 32.0 °C <89°F> (MAX HOT) with the air outlet and air volume at the AUTO positions, the following controls are made automatically by the A/C-ECU. Subject to control Air mix damper Air outlet mode Air volume MAX COOL MAX COOL position FACE position Maximum MAX HOT MAX HOT position FOOT position Maximum Fresh air position*
PROTECTION CONTROL AT AIR BAG DEPLOYMENT (DURING COLLISION)
When the air bag open is detected, the A/C system will shut down automatically.
.
CUSTOMIZED FUNCTIONS
Depending on the user's preference, the following functions can be adjusted. The programmed information is held even when the battery is disconnected. • Automatic control for inside/outside air selection Press and hold (approximately for 10 seconds) the inside/outside air selection switch to cancel or resume the automatic control for inside/outside air selection. • A/C automatic control Press and hold (approximately for 10 seconds) the A/C switch to cancel or resume the A/C automatic control.
Outside/insid Air recirculation e air position* selection damper Air conditioning switch ON*
OFF*
NOTE: "*" indicates that when the automatic control is not cancelled using the customize function, the manual operation is disabled.
.
COMMUNICATION
A/C-ECU performs the signal transmission and reception with each ECU via CAN (Controller Area Network)*. Also, with the heater control panel, it transmits and receives signals via serial communication. NOTE: *: For details of CAN communication, refer to GROUP 54C − Controller Area Network P.54C-2.
REAR WINDOW DEFOGGER TIMER CONTROL
In order to prevent battery consumption, the defogger is automatically turned OFF, 20 minutes after it is turned ON.
TSB Revision
55-10
DIAGNOSTIC FUNCTION
HEATER, AIR CONDITIONING AND VENTILATION
A/C COMPRESSOR
A/C-ECU has the following functions for easier system checks. • Diagnostic function • Service data output • Actuator test NOTE: For each item, refer to the Workshop Manual.
A/C COMPRESSOR
HIGH EFFICIENCY COMPRESSOR WITH INTEGRATED OIL SEPARATOR
High efficiency compressor with integrated oil separator has been adopted to enhance fuel economy by reducing the A/C workload.
M2551001100354
MAGNETIC CLUTCH WITH THERMAL FUSE
At the compressor lock, the thermal fuse integrated in the magnet clutch is blown due to the frictional heat against the compressor in order to reduce risk of snapping off accessory belt. The thermal fuse, together with the coil, is coated with resin to enhance resistance to corrosion.
2-STEP PROFILE COMPRESSOR
The center area of the scroll in the compressor provides 2-step profile, and thickness of area "B" shown in the figure has been increased to enhance strength. With this feature, thickness of area "A" shown where lesser load is applied is reduced, thus compressor performance is enhanced by compressing refrigerant even in central area, comparing to the previous model.
<2-step profile compressor> <Previous model> Front view Front view Section b - b Section a - a A a a B b b A B
AC507301AC
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
CONDENSER
55-11
M2551001400214
CONDENSER
Condenser Radiator
The condenser has been integrated with the radiator (cooling module) to optimize air flow and reduce weight.
AC608768AB
DUCT
To windshield (Defroster)
M2551001300518
To front door window (Side defroster) Side ventilator Center ventilator Side ventilator
To front door window (Side defroster)
To driver seat footwell
To passenger seat footwell
To rear seat footwell
To rear seat footwell
AC708628AB
The rear heater duct has been introduced, and the air distribution ratio to front and rear seats has been optimized in order to enhance the air heating performance for the rear seats, and to prevent the circulation of cooled air back to the front seats.
TSB Revision
55-12
HEATER, AIR CONDITIONING AND VENTILATION
VENTILATION SYSTEM
VENTILATION SYSTEM
M2551002000725
Rear ventilator duct
AC705661AC
Fresh air is drawn in from the front deck and expelled from the air outlet behind the rear bumper. Optimizing areas of the outside air induction hole and the air outlet enhances ventilated air flow and cabin quietness.
TSB Revision
GROUP 55
HEATER, AIR CONDITIONING AND VENTILATION
CONTENTS
GENERAL DESCRIPTION. . . . . . . . . HEATER AND AIR CONDITIONING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . HEATER CONTROL . . . . . . . . . . . . . A/C-ECU. . . . . . . . . . . . . . . . . . . . . . . 55-2 55-6 DUCT. . . . . . . . . . . . . . . . . . . . . . . . . . 55-8 VENTILATION SYSTEM. . . . . . . . . . . 55-9 55-12 55-11 A/C COMPRESSOR . . . . . . . . . . . . . . CONDENSER . . . . . . . . . . . . . . . . . . . 55-10 55-11
55-2
HEATER, AIR CONDITIONING AND VENTILATION
GENERAL DESCRIPTION
GENERAL DESCRIPTION
The new HVAC unit integrates blower, and evaporator, it increases the air flow but reduces air flow resistance and air flow noise.
M2551001500084
ENHANCEMENT IN SAFETY
• A/C system will shut down automatically if the air bags are open. • Crushable space has been adopted into HVAC unit to reduce the risk of passenger injuries if a collision occurred.
.
FEATURES
.
ENHANCEMENTS IN COMFORT
• With the adoption of automatic A/C system, the air inlets (fresh air/recirculation air), the vents, temperature at the vents and fan speed are automatically controlled according to the outside temperature and cabin temperature so that the optimum air conditioning is achieved. • By the adoption of clean air filter, the air quality in the cabin has been kept.
.
GLOBAL ENVIRONMENT PROTECTION
• New refrigerant system (HFC134a) has been adopted. • Clean air filter media and its cover are separated to reduce waste materials, when replacing the filter.
.
ENHANCEMENTS IN SERVICE QUALITY
• Reduction of refrigerant gas leakage and enhancement in serviceability by incorporating condenser and receiver • Clean air filter is installed to the backside of glove box to facilitate the filter replacement.
.
ENHANCEMENTS IN OPERATION PERFORMANCE
• Operability has been enhanced by the adoption of large triple dial. • Customize function has been added for the enhanced convenience.
.
ENHANCEMENTS IN RESPONSIBILITY
Reliable information transmission is achieved by connecting A/C-ECU and each ECU via CAN communication.
ENHANCEMENTS IN FUEL ECONOMY
• The high efficiency compressor with a 2-step and the oil separator has reduced A/C system workload, thus enhancing the fuel economy. • The idle-up speed is controlled in two steps to secure the air cooling performance during summer and to enhance the fuel economy in the moderate seasons. • The cooling fan control depending on the refrigerant pressure and on the vehicle speed reduce alternator load, thus enhancing the fuel economy.
.
SPECIFICATIONS
ITEM Air conditioning switch type Compressor type Cooling output Heating output Refrigerant Type Charge quantity g (oz.) SPECIFICATION Rotary type MSC90CAS 5.5 kw 5.7 kw R134a (HFC-134a) 480 - 520 (16.9 - 18.3)
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
GENERAL DESCRIPTION
55-3
CONSTRUCTION DIAGRAM
Ambient air temperature sensor
Interior temperature sensor
AC608755AD
AC608760AB
Low-pressure side valve High-pressure side valve Suction flexible hose Liquid pipe Heater unit
A/C pressure sensor
Discharge flexible hose Condenser A/C compressor
AC708434AC
TSB Revision
55-4
HEATER, AIR CONDITIONING AND VENTILATION
GENERAL DESCRIPTION
A/C control panel
A/C-ECU
AC708612
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
GENERAL DESCRIPTION
55-5
COMMUNICATION
Outside/Inside air selection damper control motor Fin thermo sensor Air mixing damper control motor A/C pressure sensor Mode selection damper control motor Interior temperature sensor
A/C-ECU
Power transistor
Photo sensor Blower motor
SERIAL communication
A/C control panel
Combination meter
SRS-ECU
Engine-ECU ETACS-ECU
CAN communication
Ambient air temperature sensor : Interactive communication
AC705259AB
TSB Revision
55-6
HEATER, AIR CONDITIONING AND VENTILATION
HEATER AND AIR CONDITIONING SYSTEM
HEATER AND AIR CONDITIONING SYSTEM
HEATER UNIT ASSEMBLY
Mode selection damper control motor Outside / inside air selection damper control motor
M2551001000669
Intake duct Air thermo sensor
Power transistor
Air mixing damper control motor
Blower case
A/C-ECU
Blower motor
AC607858AB
Heater unit Mode selection damper Evaporator
Air mixing damper
Intake duct
Outside / inside air selection damper
Blower case Heater core
Clean air filter
AC607857AB
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
HEATER AND AIR CONDITIONING SYSTEM
55-7
The following new unit integrated blower, heater and evaporator to increase the air flow, reduce noise, and enhanced cooler and heater performance; • Integrated heater/cooling unit has been adopted for large air flows and low noise. • Crushable space has been secured to reduce the risk of passenger injuries. • Air mix damper that is also used as a reheating prevention damper has been adopted to enhance the air cooling performance. • The A/C condensate water outlet (drain port) has been installed to behind the evaporator to restrain the clogging of drain by foreign materials. • The outlet air temperature of the defroster has been set lower than that of foot to prevent overheating the driver’s face.
• Fin thermo sensor to directly measure evaporator temperature reduces occurrence risk of an evaporator freeze which will lead to the compressor lock. • Clean air filter has been introduced as standard to protect the unit from the intrusion of foreign materials (fallen leaves and others). and, it removes the pollen and dust, and enhances the air quality inside the passenger compartment. • Clean air filter media and cover have been separated to reduce the waste material amount generated during the filter replacement. • The installation position of clean air filter has been set to the backside of glove box to facilitate the filter replacement operation. And, the one-touch tab structure has been adopted for the cover installation to enable the replacement operation without tools.
OPERATION CRUSHABLE SPACE
Front defroster Side defroster Side defroster Side outlet Center outlet Side outlet Heater core Clean air filter Heater outlet Blower motor Evaporator
.
Crushable space Crushable space Front side
Recirculation Fresh
Heater outlet to compartment AC506490AB
Evaporator Drain port
Heater core
AC506491AB
The evaporator and heater core has been longitudinally installed in the vehicle length, and the crushable space has been adopted so that the structure absorbs the impact and reduces the risk of passenger injuries, if a collision occurred.
TSB Revision
55-8
HEATER CONTROLLER
.
HEATER, AIR CONDITIONING AND VENTILATION
HEATER CONTROL
HEATER CONTROL
M2551000900584
<Vehicles for USA> Outside/Inside air selection switch Rear window defogger switch A/C switch
<Vehicles for CANADA> Outside/Inside air selection switch Rear window defogger switch
A/C switch
AC608069
AC608068
Blower knob Temperature adjustment knob Mode selection knob Temperature adjustment knob
Blower knob Mode selection knob
AC708613AB
The features of the heater controller described below have been designed for better appearance, easier operation, and enhanced visibility. • Each dial for the air outlet switching, fan volume control, and temperature adjustment has been enlarged to enhance operability. • Ring lights have been adopted to inside the dials to enhance appearance during nighttime.
• AUTO and OFF positions of the fan volume control dial have been exchanged with one another. This change prevents the dial to pass the AUTO position when the fan volume control is turned OFF, and eliminates the necessity of manual reselection when switching the inside/outside air selection manually, thus enhancing the operability. • When the air outlet switching dial and fan volume control dial are turned to the AUTO position, the A/C switch has been made to automatically turn ON to enhance convenience. (Using the customize function, this function can be cancelled. Refer to P.55-9.)
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
A/C-ECU
55-9
M2551001200403
A/C-ECU
CONTROL
. .
IDLE-UP CONTROL
A/C-ECU and the engine ECU communicate with each other through the CAN communication. The idle-up speed of the engine is controlled in two steps depending on the A/C load to secure the air cooling performance during summer and to enhance fuel economy in moderate seasons moderate.
.
FORCED DEF CONTROL
When air outlet position is switched to DEF, A/C is automatically turned ON, and outside/inside air selection damper is set to the fresh air position to quickly defrost the windshield screen.
.
OUTLET AIR TEMPERATURE CONTROL
The engine coolant and evaporator temperature have been additionally calibrated to stabilize the temperature at vents and improve A/C controllability.
.
DETECTION CONTROL FOR REFRIGERANT LEAKS
A/C-ECU determines if the refrigerant amount is less than specified or refrigerant pressure is abnormal by using the ambient temperature (ambient temperature sensor to measure refrigerant inflation rate) and refrigerant pressure (measured by the A/C pressure sensor). When refrigerant amount or refrigerant pressure is judged abnormal, the compressor is cut-off to protect the A/C system. NOTE: When abnormality occurs, the A/C indicator flashes.
.
COOLING FAN SPEED CONTROL
According to the refrigerant pressure and the vehicle speed, the cooling fan speed is controlled to reduce the exterior noise and the load of the generator for fuel economy.
.
MAX COOL, MAX HOT CONTROL
When the set temperature is at 18.0 °C <61°F> (MAX COOL) or at 32.0 °C <89°F> (MAX HOT) with the air outlet and air volume at the AUTO positions, the following controls are made automatically by the A/C-ECU. Subject to control Air mix damper Air outlet mode Air volume MAX COOL MAX COOL position FACE position Maximum MAX HOT MAX HOT position FOOT position Maximum Fresh air position*
PROTECTION CONTROL AT AIR BAG DEPLOYMENT (DURING COLLISION)
When the air bag open is detected, the A/C system will shut down automatically.
.
CUSTOMIZED FUNCTIONS
Depending on the user's preference, the following functions can be adjusted. The programmed information is held even when the battery is disconnected. • Automatic control for inside/outside air selection Press and hold (approximately for 10 seconds) the inside/outside air selection switch to cancel or resume the automatic control for inside/outside air selection. • A/C automatic control Press and hold (approximately for 10 seconds) the A/C switch to cancel or resume the A/C automatic control.
Outside/insid Air recirculation e air position* selection damper Air conditioning switch ON*
OFF*
NOTE: "*" indicates that when the automatic control is not cancelled using the customize function, the manual operation is disabled.
.
COMMUNICATION
A/C-ECU performs the signal transmission and reception with each ECU via CAN (Controller Area Network)*. Also, with the heater control panel, it transmits and receives signals via serial communication. NOTE: *: For details of CAN communication, refer to GROUP 54C − Controller Area Network P.54C-2.
REAR WINDOW DEFOGGER TIMER CONTROL
In order to prevent battery consumption, the defogger is automatically turned OFF, 20 minutes after it is turned ON.
TSB Revision
55-10
DIAGNOSTIC FUNCTION
HEATER, AIR CONDITIONING AND VENTILATION
A/C COMPRESSOR
A/C-ECU has the following functions for easier system checks. • Diagnostic function • Service data output • Actuator test NOTE: For each item, refer to the Workshop Manual.
A/C COMPRESSOR
HIGH EFFICIENCY COMPRESSOR WITH INTEGRATED OIL SEPARATOR
High efficiency compressor with integrated oil separator has been adopted to enhance fuel economy by reducing the A/C workload.
M2551001100354
MAGNETIC CLUTCH WITH THERMAL FUSE
At the compressor lock, the thermal fuse integrated in the magnet clutch is blown due to the frictional heat against the compressor in order to reduce risk of snapping off accessory belt. The thermal fuse, together with the coil, is coated with resin to enhance resistance to corrosion.
2-STEP PROFILE COMPRESSOR
The center area of the scroll in the compressor provides 2-step profile, and thickness of area "B" shown in the figure has been increased to enhance strength. With this feature, thickness of area "A" shown where lesser load is applied is reduced, thus compressor performance is enhanced by compressing refrigerant even in central area, comparing to the previous model.
<2-step profile compressor> <Previous model> Front view Front view Section b - b Section a - a A a a B b b A B
AC507301AC
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
CONDENSER
55-11
M2551001400214
CONDENSER
Condenser Radiator
The condenser has been integrated with the radiator (cooling module) to optimize air flow and reduce weight.
AC608768AB
DUCT
To windshield (Defroster)
M2551001300518
To front door window (Side defroster) Side ventilator Center ventilator Side ventilator
To front door window (Side defroster)
To driver seat footwell
To passenger seat footwell
To rear seat footwell
To rear seat footwell
AC708628AB
The rear heater duct has been introduced, and the air distribution ratio to front and rear seats has been optimized in order to enhance the air heating performance for the rear seats, and to prevent the circulation of cooled air back to the front seats.
TSB Revision
55-12
HEATER, AIR CONDITIONING AND VENTILATION
VENTILATION SYSTEM
VENTILATION SYSTEM
M2551002000725
Rear ventilator duct
AC705661AC
Fresh air is drawn in from the front deck and expelled from the air outlet behind the rear bumper. Optimizing areas of the outside air induction hole and the air outlet enhances ventilated air flow and cabin quietness.
TSB Revision
