front NISSAN TIIDA 2007 Service Repair Manual

AIR MIX DOOR MOTOR
HAC-225
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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P Air Mix Door Control Specification
COMPONENT DESCRIPTION
Air Mix Door Motor
The air mix door motor is attached to the A/C unit assembly. It
rotates so that the air mix door is opened or closed to a position set
by the front air control. Motor rotation is conveyed through a shaft
and the air mix door position is then feedback to the front air control
by PBR built-in air mix door motor.
Air Mix Door Motor Component Function CheckINFOID:0000000001547330
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE
1. Turn the temperature control dial clockwise until 32°C (90°F) is displayed.
2. Check for hot air at discharge air outlets.
>> GO TO 2.
2.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1. Turn the temperature control dial counterclockwise until 18°C (64°F) is displayed.
2. Check for cold air at discharge air outlets.
Can a symptom be duplicated?
YES >> GO TO 4.
NO >> GO TO 3.
3.PERFORM COMPLETE OPERATIONAL CHECK
Perform a complete operational check and check for any symptoms. Refer to HAC-202, "
Operational Check".
Can a symptom be duplicated?
YES >> Refer to HAC-201, "How to Perform Trouble Diagnosis For Quick And Accurate Repair".
NO >> System OK.
4.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
5.PERFORM SELF-DIAGNOSIS.
WJIA0435E
AWIIA0335ZZ

HAC-226
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
AIR MIX DOOR MOTOR
Set in Self-diagnostic mode. Refer to HAC-213, "Front Air Control Self-Diagnosis".
Are any self-diagnosis codes present?
YES >> Repair as necessary.
NO >> GO TO 5.
6. CHECK AMBIENT SENSOR CIRCUIT
Perform diagnostic procedure for the ambient sensor circuit. Refer to HAC-244, "
Ambient Sensor Diagnosis
Procedure".
YES or NO
YES >> GO TO 7
NO >> Repair as necessary.
7. CHECK IN-VEHICLE SENSOR CIRCUIT
Perform diagnostic procedure for the in-vehicle sensor circuit. Refer to HAC-247, "
In-Vehicle Sensor Diagno-
sis Procedure".
YES or NO
YES >> GO TO 8
NO >> Repair as necessary.
8. CHECK SUNLOAD SENSOR CIRCUIT
Perform diagnostic procedure for the sunload sensor circuit. Refer to HAC-250, "
Sunload Sensor Diagnosis
Procedure".
YES or NO
YES >> GO TO 9
NO >> Repair as necessary.
9. CHECK INTAKE SENSOR CIRCUIT
Perform diagnostic procedure for the intake sensor circuit. Refer to HAC-253, "
Intake Sensor Diagnosis Pro-
cedure".
YES or NO
YES >> GO TO 10
NO >> Repair as necessary.
10. CHECK AIR MIX DOOR MOTOR PBR CIRCUIT
Perform diagnostic procedure for the air mix door motor PBR circuit. Refer to HAC-226, "
Air Mix Door Motor
Diagnosis Procedure".
YES or NO
YES >> GO TO 11
NO >> Repair as necessary.
11 . RECHECK FOR SYMPTOMS
Perform a complete operational check and check for any symptoms. Refer to HAC-202, "
Operational Check".
Does another symptom exist?
YES >> Repair as necessary.
NO >> Replace front air control. Refer to XXXX.
Air Mix Door Motor Diagnosis ProcedureINFOID:0000000001547331
SYMPTOM: Discharge air temperature does not change.
 Air mix door motor does not operate.
DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR
1.CHECK AIR MIX DOOR MOTOR

AIR MIX DOOR MOTOR
HAC-227
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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1. Turn ignition switch OFF.
2. Disconnect air mix door motor harness connector.
3. Check continuity between air mix door motor terminals.
OK or NG
OK >> GO TO 2.
NG >> Replace air mix door motor. Refer to XXXX
2.CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND AIR MIX DOOR MOTOR
1. Disconnect front air control harness connector.
2. Check continuity between front air control harness connector
M86 (A) terminals and air mix door motor harness connector
M88 (B) terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND GROUND
Check continuity between front air control harness connector and
ground.
OK or NG
OK >> Replace front air control. Refer to XXXX
NG >> Repair harness or connector.
Connector Terminals Continuity
Air mix door motor: M88 21
Ye s 3
4
6
SJIA0948E
AB
Continuity
Connector Terminal Connector Terminal
Front air con-
trol: M8625
Air mix door
motor: M883
Ye s 26 6
27 1
28 4
SJIA0953E
Connector Terminal
GroundContinuity
Front air control:
M86 25
No 26
27
28
SJIA0954E

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 system components are: Front air control
 Intake door motor
 In-vehicle sensor
 Ambient sensor
 Sunload sensor
 Intake sensor
ECM
System Operation
The intake door control determines intake door position based on the ambient temperature, the intake air tem-
perature and the in-vehicle temperature. When the DEF, or OFF switches are pushed, the front air control sets
the intake door at the FRESH position.
Intake Door Control Specification
COMPONENT DESCRIPTION
Intake Door Motor
AWIIA0340GB
AWIIA0338ZZ

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 drawn from inlets set by the front air control Motor rota-
tion is conveyed to a lever which activates the intake door.
Intake Door Motor Component Function CheckINFOID:0000000001547334
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REC ( )
1. Turn mode control dial to vent mode( ).
2. Press REC ( ) switch. The REC ( )indicator should illuminate.
3. Press REC ( ) switch again. The REC ( ) indicator should go out.
4. Listen for intake door position change (you should hear blower sound change slightly).
Can a symptom be duplicated?
YES >> GO TO 3.
NO >> GO TO 2.
2.PERFORM COMPLETE OPERATIONAL CHECK
Perform a complete operational check and check for any symptoms. Refer to HAC-202, "
Operational Check".
Can a symptom be duplicated?
YES >> Refer to HAC-201, "How to Perform Trouble Diagnosis For Quick And Accurate Repair".
NO >> System OK.
3.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.PERFORM SELF-DIAGNOSIS.
Set in Self-diagnostic mode. Refer to HAC-213, "
Front Air Control Self-Diagnosis".
Are any self-diagnosis codes present?
YES >> Repair as necessary.
NO >> GO TO 5.
5. CHECK AMBIENT SENSOR CIRCUIT
Perform diagnostic procedure for the ambient sensor circuit. Refer to HAC-244, "
Ambient Sensor Diagnosis
Procedure".
YES or NO
YES >> GO TO 7
NO >> Repair as necessary.
6. CHECK IN-VEHICLE SENSOR CIRCUIT
Perform diagnostic procedure for the in-vehicle sensor circuit. Refer to XXXX IN-VEHICLE SENS DIAG.
YES or NO
YES >> GO TO 8
NO >> Repair as necessary.
7. CHECK SUNLOAD SENSOR CIRCUIT
SJIA0814E

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".
YES or NO
YES >> GO TO 9
NO >> Repair as necessary.
8. CHECK INTAKE SENSOR CIRCUIT
Perform diagnostic procedure for the intake sensor circuit. Refer to HAC-253, "
Intake Sensor Diagnosis Pro-
cedure".
YES or NO
YES >> GO TO 10
NO >> Repair as necessary.
9. CHECK AIR MIX DOOR MOTOR PBR CIRCUIT
Perform diagnostic procedure for the air mix door motor PBR circuit. Refer to HAC-226, "
Air Mix Door Motor
Diagnosis Procedure".
YES or NO
YES >> GO TO 11
NO >> Repair as necessary.
10. RECHECK FOR SYMPTOMS
Perform a complete operational check and check for any symptoms. Refer to XXXX.
Does another symptom exist?
YES >> Repair as necessary.
NO >> Replace front air control. Refer to XXXX.
Intake Door Motor Diagnosis ProcedureINFOID:0000000001547335
SYMPTOM: Intake door does not change.
 Intake door motor does not operate normally.
DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR
1.CHECK POWER SUPPLY FOR INTAKE DOOR MOTOR
1. Turn ignition switch ON.
2. Check voltage between intake door motor harness connector.
OK or NG
OK >> Replace intake door motor.
NG >> GO TO 2.
2.CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND INTAKE DOOR MOTOR
Te r m i n a l s
ConditionVo l ta g e
(Approx.)
ConnectorTe r m i n a l
(+) (−)
Intake door motor: M895 6 FRE → REC
12V
6 5 REC → FRE
SJIA0957E

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. Disconnect intake door motor harness connector.
4. Check continuity between front air control harness connector (A)
and intake door motor harness connector (B).
OK or NG
OK >> Replace front air control. Refer to XXXX
NG >> Repair harness or connector.
AB
Continuity
Connector Terminal Connector Terminal
Front air control:
M8531
Intake door motor:
M685
Ye s
32 6
SJIA0959E

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

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, the front air control causes the
blower motor speed to increase (approx. 6.5V).
Blower Motor Speed Control Specification
Front Blower Motor Component Function CheckINFOID:0000000001547340
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - FRONT BLOWER
1. Turn the blower control dial. Blower motor should operate.
2. Rotate the blower control dial clockwise, and continue checking blower speed and fan symbol until all
speeds are checked.
Can the symptom be duplicated?
YES >> GO TO 3.
NO >> GO TO 2.
2.PERFORM COMPLETE OPERATIONAL CHECK
Perform a complete operational check and check for any symptoms. Refer to HAC-202, "
Operational Check".
Can a symptom be duplicated?
YES >> Refer to HAC-201, "How to Perform Trouble Diagnosis For Quick And Accurate Repair".
NO >> System OK.
3.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.PERFORM SELF-DIAGNOSIS.
Set in Self-diagnostic mode. Refer to HAC-213, "
Front Air Control Self-Diagnosis".
Are any self-diagnosis codes present?
YES >> Repair as necessary.
NO >> GO TO 5.
5. CHECK AMBIENT SENSOR CIRCUIT
Perform diagnostic procedure for the ambient sensor circuit. Refer to HAC-244, "
Ambient Sensor Diagnosis
Procedure".
YES or NO
YES >> GO TO 6.
NO >> Repair as necessary.
6. CHECK IN-VEHICLE SENSOR CIRCUIT
Perform diagnostic procedure for the in-vehicle sensor circuit. Refer to HAC-247, "
In-Vehicle Sensor Diagno-
sis Procedure".
YES or NO
YES >> GO TO 7.
NO >> Repair as necessary.
AWIIA0297GB

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, "
Sunload Sensor Diagnosis
Procedure".
YES or NO
YES >> GO TO 8.
NO >> Repair as necessary.
8. CHECK INTAKE SENSOR CIRCUIT
Perform diagnostic procedure for the intake sensor circuit. Refer to HAC-253, "
Intake Sensor Diagnosis Pro-
cedure".
YES or NO
YES >> GO TO 9.
NO >> Repair as necessary.
9. RECHECK FOR SYMPTOMS
Perform a complete operational check and check for any symptoms. Refer to HAC-202, "
Operational Check".
Does another symptom exist?
YES >> Repair as necessary.
NO >> Replace front air control. Refer to XXXX.
Front Blower Motor Diagnosis ProcedureINFOID:0000000001547341
SYMPTOM: Front blower motor operation is malfunctioning.
DIAGNOSTIC PROCEDURE FOR BLOWER MOTOR
SYMPTOM: Front blower motor operation is malfunctioning.
1.CHECK POWER SUPPLY FOR FRONT BLOWER MOTOR
1. Disconnect front blower motor connector.
2. Turn ignition switch ON.
3. Rotate blower control dial to maximum speed.
4. Check voltage between front blower motor harness connector
M62 terminal 1 and ground.
Is the inspection result normal
YES >> GO TO 2.
NO >> Check power supply circuit and 15A fuses (Nos. 15 and 17), located in the fuse block.
 If fuses are OK, check harness for open circuit. Repair or replace if necessary.
 If fuses are NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
2.CHECK CIRCUIT POWER SUPPLY FOR VARIABLE BLOWER CONTROL
AWIIA0344GB
Te r m i n a l s
Voltag e
(Approx.) (+) (−)
Connector Terminal
Ground
Front blower mo-
tor: M621 Battery voltage
SJIA0794E