front NISSAN TIIDA 2007 Service Repair Manual

HAC-86
< BASIC INSPECTION >[AUTO AIR CONDITIONER (W/O NAVI)]
DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
How to Perform Trouble Diagnosis For Quick And Accurate RepairINFOID:0000000001547385
WORK FLOW
1.LISTEN TO CUSTOMER COMPLAINT
Listen to customer complaint. Get detailed information about the conditions and environment when the symp-
tom occurs.
>> GO TO 2
2.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 3.
3.VERIFY THE SYMPTOM WITH OPERATIONAL CHECK
Verify the symptom with operational check. Refer to HAC-87, "
Operational Check".
Can a symptom be duplicated?
YES >> GO TO 4
NO >> GO TO 5
4.GO TO APPROPRIATE TROUBLE DIAGNOSIS
Go to appropriate trouble diagnosis. Refer to HAC-184, "
SymptomMatrixChart".
Can a symptom be duplicated?
>> GO TO 5.
5.PERFORM THE FRONT AIR CONTROL SELF-DIAGNOSIS
Perform A/C auto amp. self-diagnosis. Refer toHAC-98, "
Front Air Control Self-Diagnosis".
>> If any diagnostic trouble codes set, refer to HAC-104, "
A/C System Self-Diagnosis Code Chart".
>> Confirm the repair by performing operational check. Refer to HAC-87, "
Operational Check".

INSPECTION AND ADJUSTMENT
HAC-87
< BASIC INSPECTION >[AUTO AIR CONDITIONER (W/O NAVI)]
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INSPECTION AND ADJUSTMENT
Operational CheckINFOID:0000000001547386
The purpose of the operational check is to confirm that the system operates properly.
CHECKING MEMORY FUNCTION
1. Press temperature control switch (UP: ) until 32°C is displayed.
2. Press OFF switch.
3. Turn the ignition switch OFF.
4. Turn the ignition switch ON.
5. Press the AUTO switch.
6. Confirm that the set temperature remains at previous temperature.
7. Press OFF switch.
If NG, go to trouble diagnosis procedure for HAC-198, "
Memory Function Check".
If OK, continue the check.
CHECKING BLOWER
1. Press blower motor switch (UP: ). Blower should operate on low speed. The fan symbol should have one
blade lit.
2. Press blower motor switch (UP: ), and continue checking blower speed and fan symbol until all speeds
are checked.
3. Leave blower on max. speed.
If NG, go to trouble diagnosis procedure for HAC-120, "
Front Blower Motor Diagnosis Procedure".
If OK, continue the check.
CHECKING DISCHARGE AIR
1. Press MODE switch and DEF switch.
2. Each position indicator should change shape.
3. Confirm that discharge air comes out according to the air distribution table. Refer to HAC-94, "
Discharge
Air Flow".
Intake door position is checked in the next step.
If NG, go to trouble diagnosis procedure for HAC-109, "
Mode Door Motor Diagnosis Procedure".
If OK, continue the check.
NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at
FRESH when the DEF is selected.
CHECKING RECIRCULATION
1. Press recirculation (REC) switch one time. Recirculation LED should illuminate.
2. Press fresh (FRE) switch one time. Fresh LED should illuminate.
3. Listen for intake door position change (you should hear blower sound change slightly).
If NG, go to trouble diagnosis procedure for HAC-116, "
Intake Door Motor Diagnosis Procedure".
If OK, continue the check.
CHECKING TEMPERATURE INCREASE
1. Press temperature control switch (UP: ) until 32°C is displayed.
2. Check for hot air at discharge air outlets.
If NG, go to trouble diagnosis procedure for HAC-193, "
Component Function Check".
If OK, continue the check.
CHECKING TEMPERATURE DECREASE
1. Press temperature control switch (DOWN: ) until 18°C is displayed. Conditions : Engine running at usual operating temperature

HAC-88
< BASIC INSPECTION >[AUTO AIR CONDITIONER (W/O NAVI)]
INSPECTION AND ADJUSTMENT
2. Check for cold air at discharge air outlets.
If NG, go to trouble diagnosis procedure for HAC-185, "
Component Function Check".
If OK, continue the check.
CHECK A/C SWITCH
1. Press AUTO and A/C switches.
2. A/C switch LED will turn ON.
 Confirm that the compressor clutch engages (sound or visual inspection).
If NG, go to trouble diagnosis procedure for HAC-125, "
Magnet Clutch Diagnosis Procedure".
If OK, continue the check.
CHECKING AUTO MODE
1. Press AUTO switch.
2. Display should indicate AUTO.
 Confirm that discharge air and blower speed will depend on ambient, in-vehicle, and set temperatures.
 If NG, go to trouble diagnosis procedure for HAC-163, "
Front Air Control Power and Ground Diagnosis Pro-
cedure", then if necessary, trouble diagnosis procedure for HAC-125, "Magnet Clutch Diagnosis Procedure".
 If all operational checks are OK (symptom cannot be duplicated), go to Incident Simulation Tests in XX-XX,
"*****" and perform tests as outlined to simulate driving conditions environment.
 If symptom appears, refer to HAC-86, "
How to Perform Trouble Diagnosis For Quick And Accurate Repair"
and perform applicable trouble diagnosis procedures.

HAC-90
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
FUNCTION INFORMATION
1. Variable blower control M90, M91 2. Intake door motor M89 3. In-vehicle sensor M93
4. Air mix door motor M88 5. Intake sensor M92 6. Mode door motor M87
7. Sunload sensor M94 8. Front blower motor M62 9. Front air control M50, M51
AWIIA0282ZZ

HAC-92
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
AUTOMATIC AIR CONDITIONER SYSTEM
AUTOMATIC AIR CONDITIONER SYSTEM
Control System DiagramINFOID:0000000001547392
CONTROL SYSTEM
The control system consists of input sensors, switches, the front air control (microcomputer) and outputs.
The relationship of these components is shown in the figure below:
Control System DescriptionINFOID:0000000001547393
CONTROL OPERATION
AWIIA0480ZZ
AWIIA0279GB

HAC-94
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
AUTOMATIC AIR CONDITIONER SYSTEM
MAGNET CLUTCH CONTROL
When A/C switch, AUTO switch or DEF switch is pressed, front air control inputs compressor ON signal to
BCM.
BCM sends compressor ON signal to ECM, via CAN communication line.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant-pressure sen-
sor signal, throttle angle, etc.). If it judges compressor can be turned ON, it sends compressor ON signal to
IPDM E/R, via CAN communication line.
Upon receipt of compressor ON signal from ECM, IPDM E/R turns air conditioner relay ON to operate com-
pressor.
Discharge Air FlowINFOID:0000000001547394
AWIIA0277GB
Mode door positionAir outlet/distribution
Vent Foot Defroster
100% — —
56% 44% —
16% 64% 20%
16% 53% 31%
17% — 83%
Airflow always present at driver and passenger side demisters
WJIA2190E

HAC-98
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
SELF-DIAGNOSIS FUNCTION
SELF-DIAGNOSIS FUNCTION
Front Air Control Self-DiagnosisINFOID:0000000001547401
DESCRIPTION
The self-diagnostic system diagnoses sensors, door motors, blower motor, etc. by system line. Refer to appli-
cable sections (items) for details. Shifting from usual control to the self-diagnostic system is accomplished by
starting the engine (turning the ignition switch ON) and pressing OFF switch for at least 5 seconds. The OFF
switch must be pressed within 10 seconds after starting the engine (ignition switch is turned ON). This system
will be cancelled by either pressing AUTO switch or turning the ignition switch OFF. Shifting from one step to
another is accomplished by means of pushing front air control switches, as required.
Additionally shifting from STEP-5 to AUXILIARY MECHANISM is accomplished by means of pushing blower
motor switch (UP: ).
FUNCTION CONFIRMATION PROCEDURE
1.SET IN SELF-DIAGNOSTIC MODE
1. Turn ignition switch ON.
2. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press OFF switch for at least 5 seconds.
AWIIA0284GB

SELF-DIAGNOSIS FUNCTION
HAC-99
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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CAUTION:
If battery voltage drops below 12V during diagnosis STEP-3, door motor speed becomes slower and
as a result, the system may generate an error even when operation is usual. To avoid this, start engine
before performing this diagnosis.
>> GO TO 2.
2.STEP-1: LED AND DISPLAY ARE CHECKED
Check display screen (1) and LED illumination (2).
OK or NG
OK >> GO TO 3.
NG >> Malfunction OFF switch or AUTO switch. Refer to HAC-
311, "Self-Diagnosis".
3.CHECK TO ADVANCE SELF-DIAGNOSIS STEP-2
Press temperature control switch (UP: ).
Advance to self
-diagnosis STEP-2?
YES >> GO TO 4.
NO >> Replace front air control (temperature control switch is malfunctioning). Refer to XX.
4.CHECK TO RETURN SELF-DIAGNOSIS STEP-1
Press temperature control switch (DOWN: ).
Return to self
-diagnosis STEP-1?
YES >> GO TO 5.
NO >> Replace front air control (temperature control switch is malfunctioning). Refer to XX.
5.STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
Press temperature control switch (UP: ).
Does code No. 20 appear on the display?
YES >> GO TO 6.
NO >> GO TO 13.
6.STEP-3: AIR MIX DOOR AND MODE DOOR POSITIONS ARE CHECKED
Press temperature control switch (UP: ).
Does code No. 30 appear on the display?
YES >> GO TO 7.
NO >> GO TO 14.
AWIIA0285ZZ
SJIA0737E
SJIA0738E

HAC-100
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
SELF-DIAGNOSIS FUNCTION
7.STEP-4: OPERATION OF EACH DOOR MOTOR IS CHECKED
1. Press temperature control switch (UP: ).
2. Press (DEF) switch. Code No. of each door motor test is
indicated on the display.
>> GO TO 8.
8.CHECK ACTUATORS
Refer to HAC-94, "
Discharge Air Flow" and confirm discharge air flow, air temperature, blower motor voltage
and compressor operation.
Checks must be made visually, by listening to any noise, or by touching air outlets with your hand, etc. for
improper operation.
OK or NG
OK >> GO TO 9.
NG >>  Air outlet does not change.
Go to Mode Door Motor Circuit. Refer to HAC-109, "
Mode Door Motor Diagnosis Procedure".
 Intake door does not change.
Go to Intake Door Motor Circuit. Refer to HAC-116, "
Intake Door Motor Diagnosis Procedure".
 Blower motor operation is malfunctioning.
Go to Blower Motor Circuit. Refer to HAC-120, "
Front Blower Motor Diagnosis Procedure".
 Magnet clutch does not engage.
Go to Magnet Clutch Circuit. Refer to HAC-125, "
Magnet Clutch Diagnosis Procedure".
 Discharge air temperature does not change.
Go to Air Mix Door Motor Circuit. Refer to HAC-112, "
Air Mix Door Motor Diagnosis Procedure".
9.STEP-5: TEMPERATURE OF EACH SENSOR IS CHECKED
1. Press temperature control switch (UP: ).
2. Code No. 5 appears on the display.
>> GO TO 10.
10.CHECK AMBIENT SENSOR
RHA495A
Code No. 414243444546
Mode door position VENT B/L 1 B/L 2 FOOT D/F DEF
Intake door position REC REC 20% FRE 80% FRE FRE FRE
Air mix door position FULL COLD FULL COLD 50% 50% FULL HOT FULL HOT
Blower motor voltage 5V 10.5V 8.5V 8.5V 8.5V Battery voltage
Compressor ON ON ON OFF OFF ON
Blower motor ON signal 12V 12V 12V 1V 1V 12V

HAC-102
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
SELF-DIAGNOSIS FUNCTION
*6: HAC-116, "Intake Door Motor Diagnosis Procedure".
>> INSPECTION END
14.CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH
Air mix and/or mode door motor is/are malfunctioning.
Door motor corresponding to the DTC
DTC for an inoperative harness
(If two or more air mix or mode doors are out of order, corresponding code numbers blink respectively twice.)
*1: If air mix door motor harness connector is disconnected, the following display pattern will appear.
31→32→33→34→Return to 31
*2: If mode door motor harness connector is disconnected, the following display pattern will appear.
35→36→37→38→Return to 35
*3: HAC-112, "
Air Mix Door Motor Diagnosis Procedure".
*4: HAC-109, "
Mode Door Motor Diagnosis Procedure".
NOTE:
 If all four terminals of each door motor show an open circuit, there
is probably a disconnected connector or an open circuit in actuator
drive power supply harness.
 If a short circuit occurs in the harness between terminal for each
door motor and drive signal, although it cannot be detected by self-
diagnosis, the door motor will vibrate when it operate.
Door Motor Starting Position Reset
SJIA0752E
Code No.*1 *2 31, 32, 33, 34 35, 36, 37, 38
Corresponding door motor Air mix door Mode door
Corresponding door motor Air mix door motor Mode door motor
Corresponding terminal
(Door motor side)34163416
Corresponding terminal
(Front air control side)19 22 21 20 23 26 25 24
Code number for short cir-
cuit
AUTO31AUTO32AUTO33AUTO34AUTO35AUTO36AUTO37AUTO38
Code number for open cir-
cuit31 32 33 34 35 36 37 38
Reference Page *3 *4
AWIIA0287GB