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 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

BLOWER MOTOR CONTROL SYSTEM
HAC-235
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1. Turn ignition switch OFF.
2. Connect front blower motor connector.
3. Disconnect variable blower control connector.
4. Turn ignition switch ON.
5. Check voltage between variable blower control harness connec-
tors M91 (A) terminal 1, and M90 (B) terminal 6 and ground.
Is the inspection result normal
YES >> GO TO 3.
NO >>  Terminal 1 - Ground: Repair harness or connector.
 Terminal 6 - Ground: GO TO 5.
3.CHECK GROUND CIRCUIT FOR VARIABLE BLOWER CONTROL
1. Turn ignition switch OFF.
2. Check continuity between variable blower control harness con-
nector M91 terminal 2 and ground.
Is the inspection result normal
YES >> GO TO 4.
NO >> Repair harness or connector.
4.CHECK BLOWER MOTOR
1. Disconnect front blower motor connector.
2. Check continuity between front blower motor terminals.
Is the inspection result normal
YES >> GO TO 5.
NO >> Replace blower motor. Refer to XXXX.
5.CHECK CIRCUIT CONTINUITY BETWEEN FRONT BLOWER MOTOR AND VARIABLE BLOWER CON-
TROL
Check continuity between front blower motor harness connector
M62 (A) terminal 2 and variable blower control harness connector
M90 (B) terminal 6.
Is the inspection result normal
Te r m i n a l s
Voltag e
(Approx.) (+) (−)
Connector Terminal
Ground
Variable blower control: M911 Battery voltage
Variable blower control: M906 Ground Battery voltage
AWIIA0286ZZ
Connector Terminal
GroundContinuity
Variable blower control:
M912Yes
AWIIA0299ZZ
Terminals Continuity
12 Yes
SJIA0798E
AB
Continuity
Connector Terminal Connector Terminal
Front blower mo-
tor: M622Variable blower
control: M906Yes
AWIIA0302ZZ

HAC-236
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
BLOWER MOTOR CONTROL SYSTEM
YES >> GO TO 6.
NO >> Repair harness or connector.
6.CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND VARIABLE BLOWER CONTROL
1. Disconnect front air control connector.
2. Check continuity between front air control harness connector
M85 (A) terminal 21 and variable blower control harness con-
nector M90 (B) terminal 4.
Is the inspection result normal
YES >> Replace variable blower control. Refer to XXXX
NO >> Repair harness or connector.
7.CHECK FOR FRONT AIR CONTROL OUTPUT 2
1. Reconnect the front blower motor and the variable blower con-
trol.
2. Turn ignition switch ON.
3. Check output signal between front air control harness connector
M85 terminal 21 and ground.
Is the inspection result normal
YES >> Replace front air control. Refer to XXXX.
NO >> Replace variable blower control. Refer to XXXX.
Front Blower Motor Component InspectionINFOID:0000000001547342
COMPONENT INSPECTION
Front Blower Motor
Confirm smooth rotation of the blower motor (1).
 Ensure that there are no foreign particles inside the A/C unit
assembly.
AB
Continuity
Connector Terminal Connector Terminal
Front air control:
M8521Variable blower
control: M904Yes
AWIIA0560ZZ
Te r m i n a l s
ConditionVo l ta g e
(Approx.) (+) (−)
Connector Terminal
Ground Front air
control:
M8521Blower
speed: 1st
SJIA0887E
ZJIA0863J
SJIA0735E

BLOWER MOTOR CONTROL SYSTEM
HAC-237
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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Apply 12 volts to terminal 1 and ground to terminal 2 and verify that
the motor operates freely and quietly.
Blower Relay
Check continuity between terminals by supplying 12 volts and
ground to coil side terminals of relay.
WJIA2240E
WJIA1401E