sensor NISSAN TIIDA 2007 Service Repair Manual

POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
HAC-163
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
Component DescriptionINFOID:0000000001547446
COMPONENT DESCRIPTION
Front Air Control
The front air control has a built-in microcomputer which processes information sent from various sensors
needed for air conditioner operation. The air mix door motor, mode door motor, intake door motor, blower
motor and compressor are then controlled.
The front air control is unitized with control mechanisms. Signal from various switches and Potentio Tempera-
ture Control (PTC) are directly entered into front air control.
Self-diagnostic functions are also built into front air control to provide quick check of malfunctions in the auto
air conditioner system.
Potentio Temperature Control (PTC)
The PTC is built into the front air control. It can be set at an interval of 1°C (34°F) in the 18°C (64°F) to 32°C
(90°F) temperature range by turning temperature control switch. The set temperature is displayed.
Front Air Control Component Function CheckINFOID:0000000001547447
SYMPTOM: A/C system does not come on.
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - AUTO MODE
1. Press the AUTO switch and A/C switch.
2. Display should indicate AUTO. Confirm that the compressor clutch engages (sound or visual inspection).
(Discharge air and blower speed will depend on ambient, in-vehicle and set temperatures.)
Can a symptom be duplicated?
YES >> GO TO 2.
NO >> Perform a complete operational check. Refer to HAC-87, "
Operational Check".
2.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 3.
3.CHECK POWER AND GROUND CIRCUIT
Check main power supply and ground circuit. Refer to HAC-163, "
Front Air Control Power and Ground Diag-
nosis Procedure".
Is the inspection result normal?
YES >> System OK.
NO >> Replace Front air control. Refer to XX.
Front Air Control Power and Ground Diagnosis ProcedureINFOID:0000000001547448
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
SYMPTOM: A/C system does not come on.
AWIIA0289GB

AIR CONDITIONER CONTROL
HAC-165
< ECU DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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ECU DIAGNOSIS
AIR CONDITIONER CONTROL
Front Air Control Terminals Reference ValuesINFOID:0000000001547449
Measure voltage between each terminal and ground by following terminals and reference value for front air
control.
PIN CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUE FOR FRONT AIR CONTROL
AWIIA0502ZZ
Te r m i n a l
No.Wire
colorItemIgnition
switchConditionVo l ta g e
(V)
1 LG Power supply for BAT OFF-
Battery voltage
3RPower supply for intake door
PBR (5V output)ON - Approx. 5
4BREngine coolant temperature
sensor signalONAt idle (after warming up, ap-
prox. 80°C)
CAUTION:
The wave forms vary de-
pending on coolant tempera-
ture.
5 B Illumination ground ON - Approx. 0
7 R Power supply for IGN 2 OFF - Battery voltage
9 V PTC Heater ON/OFF signal ON Full Hot switch ON Approx. 12
10 B Ground ON - Approx. 0
12 P Blower motor ON signal ON FAN speed: 1st step (manual)
13 O Compressor ON signal ONA/C switch: ON
(Blower motor operates.)
SKIB3651J
ZJIA0583J
ZJIA0584J

HAC-166
< ECU DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
AIR CONDITIONER CONTROL
14 WRear window defogger ON
signalONWhen rear window defogger
switch is depressed.Approx. 0
When rear window defogger
switch is released.Approx. 5
15 GR Blower PWM ONBlower motor speed: 1st step
(manual)
16 GR Illumination signal ONLight switch: ON Approx. 12
Light switch: OFF Approx. 0
17 O Power supply for IGN 1 ON - Battery voltage
19 BR
Air mix door motor drive sig-
nalONImmediately after temperature
adjustment switch operation 20 G
21 LG
22 R
23 GR
Mode door motor drive signal ONImmediately after mode switch
operation 24 W
25 Y
26 V
27 GIntake door motor drive sig-
nalONREC or
FRE switchREC→FRE Approx. 0
FRE→REC Approx. 12
28 LG In-vehicle sensor - - -
29 O Intake sensor - - -
30 SB Ambient sensor - - -
31 P Sunload sensor - - -
32 RRear window defogger feed-
back signalONRear window defogger: ON Approx. 12
Rear window defogger: OFF Approx. 0
33 BR Sensor ground ON - Approx. 0
34 L Gas sensor signal ON - Approx. 0.5 - 5
35 SBIntake door motor feedback
signalONREC position Approx. 5
FRE position Approx. 0
36 VIntake door motor drive sig-
nalONREC or
FRE switchREC→FRE Approx. 12
FRE→REC Approx. 0 Te r m i n a l
No.Wire
colorItemIgnition
switchConditionVoltag e
(V)
ZJIA0863J
HAK0627D
HAK0627D

INSUFFICIENT COOLING
HAC-191
< SYMPTOM DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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P Both High- and Low-pressure Sides are Too Low
Low-pressure Side Sometimes Becomes Negative
Gauge indication Refrigerant cycle Probable cause Corrective action
High-pressure side is too low
and low-pressure side is too
high.High- and low-pressure sides
become equal soon after com-
pressor operation stops.Compressor pressure operation
is improper.
↓
Damaged inside compressor
packings.Replace compressor.
No temperature difference be-
tween high- and low-pressure
sides.Compressor pressure operation
is improper.
↓
Damaged inside compressor
packings.Replace compressor.
AC356A
Gauge indication Refrigerant cycle Probable cause Corrective action
Both high- and low-pressure
sides are too low. There is a big temperature dif-
ference between liquid tank
outlet and inlet. Outlet tem-
perature is extremely low.
 Liquid tank inlet and expan-
sion valve are frosted.Liquid tank inside is slightly
clogged. Replace liquid tank.
 Check oil for contamination.
 Temperature of expansion
valve inlet is extremely low as
compared with areas near liq-
uid tank.
 Expansion valve inlet may be
frosted.
 Temperature difference oc-
curs somewhere in high-pres-
sure side.High-pressure pipe located be-
tween liquid tank and expansion
valve is clogged. Check and repair malfunc-
tioning parts.
 Check oil for contamination.
Expansion valve and liquid tank
are warm or only cool when
touched.Low refrigerant charge.
↓
Leaking fittings or componentsCheck refrigerant for leaks.
Refer to XXXX CHECKING OF
REFRIG LEAKS .
There is a big temperature dif-
ference between expansion
valve inlet and outlet while the
valve itself is frosted.Expansion valve closes a little
compared with the specification.
↓
1. Improper expansion valve
adjustment.
2. Malfunctioning expansion
valve.
3. Outlet and inlet may be
clogged. Remove foreign particles by
using compressed air.
 Replace expansion valve.
 Check oil for contamination.
An area of the low-pressure pipe
is colder than areas near the
evaporator outlet.Low-pressure pipe is clogged or
crushed. Check and repair malfunc-
tioning parts.
 Check oil for contamination.
Air flow volume is not enough or
is too low.Evaporator is frozen. Check intake sensor circuit.
Refer to XXXX INTAKE
SENSOR CIR .
 Replace compressor.
 Repair evaporator fins.
 Replace evaporator.
 Refer to XXXX BLOWER
MOTOR CIR..
AC353A

INSUFFICIENT HEATING
HAC-193
< SYMPTOM DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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INSUFFICIENT HEATING
Component Function CheckINFOID:0000000001547457
SYMPTOM: Insufficient heating
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE
1. Press the AUTO switch.
2. Turn the temperature control dial (driver) clockwise until 32° C (90° F) is displayed.
3. Check for hot air at discharge air outlets.
Can this symptom be duplicated?
YES >> GO TO 2.
NO >> Perform complete system operational check. Refer to HAC-87, "
Operational Check".
2.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 3.
3.PERFORM SELF-DIAGNOSIS
Perform self-diagnosis. Refer to HAC-98, "
Front Air Control Self-Diagnosis".
Is the inspection results normal?
YES >> GO TO 4.
NO >> Refer to HAC-197, "
Self-Diagnosis".
4.CHECK ENGINE COOLING SYSTEM
1. Check for proper engine coolant level. Refer to XX-XX, "*****"
.
2. Check hoses for leaks or kinks.
3. Check radiator cap. Refer to XX-XX, "*****"
.
4. Check for air in cooling system.
>> GO TO 5.
5.CHECK AIR MIX DOOR OPERATION
Check the operation of the air mix door.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Check the air mix door motor circuit. Refer to HAC-112, "
Air Mix Door Motor Diagnosis Proce-
dure".
6.CHECK AIR DUCTS
Check for disconnected or leaking air ducts.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair all disconnected or leaking air ducts.
7.CHECK HEATER HOSE TEMPERATURES
1. Start engine and warm it up to normal operating temperature.
2. Touch both the inlet and outlet heater hoses.
Is the inspection result normal?
YES >> Hot inlet hose and a warm outlet hose: GO TO 8.
NO >> Both hoses warm: GO TO 9.
8.CHECK ENGINE COOLANT SYSTEM
Check engine control temperature sensor. Refer to XX-XX, "*****"
.
Is the inspection result normal?

SELF-DIAGNOSIS CANNOT BE PERFORMED
HAC-197
< SYMPTOM DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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SELF-DIAGNOSIS CANNOT BE PERFORMED
Self-DiagnosisINFOID:0000000001682699
SYMPTOM: Self-diagnosis cannot be performed.
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - AUTO MODE
1. Press the AUTO switch.
2. Display should indicate AUTO. Discharge air and blower speed will depend on ambient, in-vehicle and set
temperatures.
Can a symptom be duplicated?
YES >> GO TO 2.
NO >> Perform a complete operational check. Refer to XX-XX, "*****"
.
2.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 3.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and ground circuit. Refer to XX-XX, "*****"
.
Is the inspection result normal?
YES >> Cause cannot be confirmed by self-diagnosis.
NO >> GO TO 4.
4.CHECK AMBIENT SENSOR CIRCUIT
Check ambient sensor circuit. Refer to XX-XX, "*****"
.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace as necessary.
5.CHECK IN-VEHICLE SENSOR CIRCUIT
Check in-vehicle sensor circuit. Refer to XX-XX, "*****"
.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace as necessary.
6.CHECK INTAKE SENSOR CIRCUIT
Check intake sensor circuit. Refer to XX-XX, "*****"
.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace as necessary.
7.CHECK AIR MIX DOOR MOTOR PBR CIRCUIT
Check air mix door motor PBR circuit. Refer to XX-XX, "*****"
.
Is the inspection result normal?
OK >> Perform a complete operational check and check for other symptoms. Refer to XX-XX, "*****".
NG >> Repair or replace as necessary.

HAC-204
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
FUNCTION INFORMATION
FUNCTION DIAGNOSIS
FUNCTION INFORMATION
Component Part LocationINFOID:0000000001548103
ENGINE COMPARTMENT
PASSENGER COMPARTMENT
1. A/C Compressor F3 2. Refrigerant pressure sensor E17 3. Ambient sensor E60
AWIIA0602ZZ

FUNCTION INFORMATION
HAC-205
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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1. Variable blower control M90, M91 2. Intake door motor M89 3. Air mix door motor M88
4. In-vehicle sensor M93 5. Intake sensor M92 6. Mode door motor M87
7. Sunload sensor M94 8. Front blower motor M62 9. Front air control M85, M86
AWIIA0321ZZ

AUTOMATIC AIR CONDITIONER SYSTEM
HAC-207
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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AUTOMATIC AIR CONDITIONER SYSTEM
Control System DiagramINFOID:0000000001547312
CONTROL SYSTEM
The control system consists of input sensors, switches, the front air control (microcomputer) and outputs.
The relationships of these components is shown in the diagram below:
Control System DescriptionINFOID:0000000001547313
AWIIA0322GB
1. Mode control dial 2. Rear window defogger switch 3. A/C switch
4. Intake switch 5. Blower control dial 6. Temperature control dial
AWIIA0323ZZ

HAC-208
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
AUTOMATIC AIR CONDITIONER SYSTEM
MODE CONTROL DIAL
Controls the air discharge outlets.
Positions the air outlet doors to the defrost position. Also positions the intake doors to the outside air position.
When shifting mode control dial to DEF under the following conditions, compressor is turned ON. (A/C LED
ON)
 BLOWER: ON
 A/C: OFF
TEMPERATURE CONTROL DIAL (POTENTIO TEMPERATURE CONTROL)
Increase or decrease the set temperature.
BLOWER CONTROL DIAL
Automatically or manually control the blower speed. Seven speeds are available for manual control.
Shifting blower control dial to AUTO, compressor is turned ON automatically.
REAR WINDOW DEFOGGER SWITCH
When illumination is ON, rear window is defogged.
A/C SWITCH
The compressor is ON or OFF.
(Pressing the A/C switch when the blower control dial is ON will turn off the A/C switch and compressor.)
INTAKE SWITCH
 When intake switch is ON, REC indicator turns ON, and air inlet is fixed to REC.
 When press intake switch again, FRE indicator turns ON, and air inlet is fixed to FRE.
 When DEF position or FRE indicator is turned ON, or when compressor is turned from ON to OFF, REC
switch is automatically turned OFF (fixed to FRE mode).
REC mode can be re-entered by pressing intake switch again. (Except DEF position)
MAGNET CLUTCH CONTROL
When mode control dial and blower control dial is turned to AUTO position, 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:0000000001547314
AWIIA0324GB