2007 NISSAN TIIDA Service Repair Manual

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Page 3561 of 5883

NISSAN TIIDA 2007 Service Repair Manual HAC-228
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
INTAKE DOOR MOTOR
INTAKE DOOR MOTOR
System DescriptionINFOID:0000000001547333
SYSTEM DESCRIPTION
Component Parts
Intake door control syst

Page 3562 of 5883

NISSAN TIIDA 2007 Service Repair Manual INTAKE DOOR MOTOR
HAC-229
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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The intake door motor is attached to the A/C unit assembly. It rotates
so that air is

Page 3563 of 5883

NISSAN TIIDA 2007 Service Repair Manual HAC-230
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
INTAKE DOOR MOTOR
Perform diagnostic procedure for the sunload sensor circuit. Refer to HAC-250, "Sunload Sensor Diagnosis
Procedure".
YE

Page 3564 of 5883

NISSAN TIIDA 2007 Service Repair Manual INTAKE DOOR MOTOR
HAC-231
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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1. Turn ignition switch OFF.
2. Disconnect front air control harness connector.
3. Dis

Page 3565 of 5883

NISSAN TIIDA 2007 Service Repair Manual HAC-232
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
BLOWER MOTOR CONTROL SYSTEM
BLOWER MOTOR CONTROL SYSTEM
System DescriptionINFOID:0000000001547339
SYSTEM DESCRIPTION
Component Parts
Blow

HAC-232
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
BLOWER MOTOR CONTROL SYSTEM
BLOWER MOTOR CONTROL SYSTEM
System DescriptionINFOID:0000000001547339
SYSTEM DESCRIPTION
Component Parts
Blower motor speed control system components are: Front air control
In-vehicle sensor
Ambient sensor
Sunload sensor
Intake sensor
System Operation
Automatic Mode
In the automatic mode, the blower motor speed is calculated by the front air control based on input from in-
vehicle sensor, sunload sensor, intake sensor and ambient sensor.
The blower motor is applied voltage ranges from approximately 3.0 volts (lowest speed) to 12 volts (highest
speed).
The control blower speed (in the range of 3.0 to 12V), front air control supplies a gate voltage to the power
transistor. Based on this voltage, front air control controls voltage supplied to the blower motor.
Starting Blower Motor Speed Control
Start up from COLD SOAK Condition (Automatic mode)
In a cold start up condition where the engine coolant temperature is below 56°C, the blower will not operate for
a short period of time (up to 150 seconds). The exact start delay time varies depending on the ambient and
engine coolant temperature.
In the most extreme case (very low ambient) the blower starting delay will be 150 seconds as described
above. After this delay, the blower will operate at low speed until the engine coolant temperature rises above
56°C, at which time the blower speed will increase to the objective speed.
Start up from usual or HOT SOAK Condition (Automatic mode)
The blower will begin operation momentarily after the A/C switch is pushed. The blower speed will gradually
rise to the objective speed over a time period of 3 seconds or less (actual time depends on the objective
blower speed).
Blower Speed Compensation
Sunload
When the in-vehicle temperature and the set temperature are very close, the blower will be operating at low
speed. The low speed will vary depending on the sunload. During conditions of low or no sunload, the blower
AWIIA0341GB

Page 3566 of 5883

NISSAN TIIDA 2007 Service Repair Manual BLOWER MOTOR CONTROL SYSTEM
HAC-233
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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low speed is usual low speed (approx. 4.0V). During high sunload conditions,

Page 3567 of 5883

NISSAN TIIDA 2007 Service Repair Manual HAC-234
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
BLOWER MOTOR CONTROL SYSTEM
7. CHECK SUNLOAD SENSOR CIRCUIT
Perform diagnostic procedure for the sunload sensor circuit. Refer to HAC-250

Page 3568 of 5883

NISSAN TIIDA 2007 Service Repair Manual BLOWER MOTOR CONTROL SYSTEM
HAC-235
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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1. Turn ignition switch OFF.
2. Connect front blower motor connector.
3. Dis

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