engine NISSAN TIIDA 2007 Service Repair Manual

INSUFFICIENT COOLING
HAC-189
< SYMPTOM DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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Testing must be performed as follows:
Test ReadingINFOID:0000000001547455
TEST READING
Recirculating-to-discharge Air Temperature Table
Ambient Air Temperature-to-operating Pressure Table
*1: In the motor fan low-speed control
*2: In the motor fan high-speed control
Trouble Diagnoses for Unusual PressureINFOID:0000000001547456
TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE
Vehicle condition Indoors or in the shade (in a well-ventilated place)
Doors Closed
Door window Open
Hood Open
TEMP. Max. COLD
Mode switch
(Ventilation) set
Recirculation (REC) switch
(Recirculation) set
Fan (blower) speedMax. speed set
Engine speed Idle speed
Operate the air conditioning system for 10 minutes before taking measurements.
Inside air (Recirculating air) at blower assembly inlet
Discharge air temperature at center ventilator
°C (°F) Relative humidity
%Air temperature
°C (°F)
50 - 6020 (68) 7.2 - 9.1 (45 - 48)
25 (77) 11.4 - 13.8 (53 - 57)
30 (86) 15.5 - 18.4 (60 - 65)
35 (95) 20.3 - 23.7 (69 - 75)
60 - 7020 (68) 9.1 - 10.9 (48 - 52)
25 (77) 13.8 - 16.2 (57 - 61)
30 (86) 18.4 - 21.3 (65 - 70)
35 (95) 23.7 - 27.1 (75 - 81)
Ambient air
High-pressure (Discharge side)
kPa (bar, kg/cm
2, psi)Low-pressure (Suction side)
kPa (bar, kg/cm2, psi) Relative humidity
%Air temperature
°C (°F)
50 - 7020 (68)843 - 1,036 *1
(11.08 - 13.63, 8.6 - 10.6, 122 - 150)159.0 - 194.0
(1.59 - 1.94, 1.62 - 1.98, 23.1 - 28.1)
25 (77)1,094 - 1,338 *1
(10.94 - 13.38, 11.2 - 13.6, 159 - 194)196.3 - 240.0
(1.96 - 2.40, 2.00 - 2.45, 28.5 - 34.8)
30 (86)1,298 - 1,590 *1
(12.98 - 15.90, 13.2 - 16.2, 188 - 231)248.0 - 302.7
(2.48 - 3.03, 2.53 - 3.09, 36.0 - 43.9)
35 (95)1,383 - 1,688 *2
(13.83 - 16.88, 14.1 - 17.2, 201 - 245)308.8 - 377.4
(3.09 - 3.77, 3.15 - 3.85, 44.8 - 54.7)
40 (104)1,628 - 1,988 *2
(16.28 - 19.88, 16.6 - 20.3, 236 - 288)377.4 - 461.2
(3.77 - 4.61, 3.85 - 4.70, 54.7 - 66.8)

HAC-190
< SYMPTOM DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
INSUFFICIENT COOLING
Whenever system’s high and/or low side pressure(s) is/are unusual, diagnose using a manifold gauge. The
marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Since the
standard (usual) pressure, however, differs from vehicle to vehicle, refer to above table (Ambient air tempera-
ture-to-operating pressure table).
Both High- and Low-pressure Sides are Too High
High-pressure Side is Too High and Low-pressure Side is Too Low
High-pressure Side is Too Low and Low-pressure Side is Too High
Gauge indication Refrigerant cycle Probable cause Corrective action
Both high- and low-pressure
sides are too high.Pressure is reduced soon af-
ter water is splashed on con-
denser.Excessive refrigerant charge in refrig-
eration cycle.Reduce refrigerant until
specified pressure is ob-
tained.
Air suction by cooling fan is in-
sufficient.Insufficient condenser cooling perfor-
mance.
↓
1. Condenser fins are clogged.
2. Improper fan rotation of cooling
fan. Clean condenser.
 Check and repair cooling
fan if necessary.
 Low-pressure pipe is not
cold.
 When compressor is
stopped high-pressure val-
ue quickly drops by approx-
imately 196 kPa (1.96 bar, 2
kg/cm
2, 28 psi). It then de-
creases gradually thereaf-
ter.Poor heat exchange in condenser
(After compressor operation stops,
high-pressure decreases too slowly.).
↓
Air in refrigeration cycle.Evacuate repeatedly and
recharge system.
Engine tends to overheat. Engine cooling systems malfunction.Check and repair each en-
gine cooling system.
 An area of the low-pressure
pipe is colder than areas
near the evaporator outlet.
 Plates are sometimes cov-
ered with frost. Excessive liquid refrigerant on low-
pressure side.
 Excessive refrigerant discharge
flow.
 Expansion valve is open a little
compared with the specification.
↓
Improper expansion valve adjust-
ment.Replace expansion valve.
AC359A
Gauge indication Refrigerant cycle Probable cause Corrective action
High-pressure side is too high
and low-pressure side is too low.
Upper side of condenser and
high-pressure side are hot,
however, liquid tank is not so
hot.High-pressure tube or parts located
between compressor and condenser
are clogged or crushed. Check and repair or re-
place malfunctioning
parts.
 Check oil for contami-
nation.
AC360A

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?

HAC-194
< SYMPTOM DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
INSUFFICIENT HEATING
YES >> System OK.
NO >> Repair or replace as necessary. Retest.
9.CHECK HEATER HOSES
Check heater hoses for proper installation.
Is the inspection result normal?
YES >> System OK.
NO >> 1. Back flush heater core.
2. Drain the water from the system.
3. Refill system with new engine coolant. Refer to XX-XX, "*****"
.
4. GO TO 10 to retest.
10.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 >> System OK.
NO >> Replace heater core. Refer to XX-XX, "*****"
.

HAC-202
< BASIC INSPECTION >[AUTO AIR CONDITIONER (W/NAVI)]
INSPECTION AND ADJUSTMENT
INSPECTION AND ADJUSTMENT
Operational CheckINFOID:0000000001547306
The purpose of the operational check is to confirm that the system operates properly.
CHECKING BLOWER
1. Turn blower control dial to 1st speed. Blower should operate on low speed.
2. Turn blower control dial to 2nd speed, and continue checking blower motor until all speed are checked.
3. Leave blower on max. speed.
If NG, go to trouble diagnosis procedure for HAC-234, "
Front Blower Motor Diagnosis Procedure".
If OK, continue the check.
CHECKING DISCHARGE AIR
1. Turn mode control dial to each position.
2. Confirm that discharge air comes out according to the air distribution table. Refer to HAC-208, "
Discharge
Air Flow".
Intake door position is checked in the next step.
If NG, go to trouble diagnosis procedure for HAC-222, "
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 INTAKE DOOR
1. Press intake switch. Recirculation indicator should illuminate.
2. Press intake switch again. Fresh indicator 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-230, "
Intake Door Motor Diagnosis Procedure".
If OK, continue the check.
CHECKING TEMPERATURE DECREASE
1. Turn temperature control dial counterclockwise until 18°C (64°F).
2. Check for cold air at discharge air outlets.
If NG, go to trouble diagnosis procedure for HAC-299, "
Component Function Check".
If OK, continue the check.
CHECKING TEMPERATURE INCREASE
1. Turn temperature control dial clockwise until 32°C (90°F).
2. Check for hot air at discharge air outlets.
If NG, go to trouble diagnosis procedure for HAC-307, "
Component Function Check".
If OK, continue the check.
CHECKING A/C SWITCH
1. Turn blower control dial to ON.
2. Press A/C switch.
3. A/C switch indicator will turn ON.
 Confirm that the compressor clutch engages (sound or visual inspection).
If NG, go to trouble diagnosis procedure for HAC-239, "
Magnet Clutch Diagnosis Procedure".
If OK, continue the check.
CHECKING AUTO MODE
1. Set mode control dial and blower control dial to AUTO position.
2. Press A/C switch.Conditions : Engine running at usual operating temperature

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

SELF-DIAGNOSIS FUNCTION
HAC-213
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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SELF-DIAGNOSIS FUNCTION
Front Air Control Self-DiagnosisINFOID:0000000001547321
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 intake switch for at least 5 seconds. The
intake switch must be pressed within 10 seconds after starting the engine (ignition switch is turned ON). This
system will be cancelled by either pressing A/C switch or turning the ignition switch OFF. Shifting from one
step to another is accomplished by means of turning blower control dial, as required.
FUNCTION CONFIRMATION PROCEDURE
1.SET IN SELF-DIAGNOSTIC MODE
1. Set temperature control dial at 22°C (72°.
2. Set mode control dial to B/L or FOOT position.
3. Set blower control dial to OFF position.
4. Turn ignition switch ON.
AWIIA0326GB

HAC-214
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
SELF-DIAGNOSIS FUNCTION
5. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press intake switch for at least 5 seconds.
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: LEDS ARE CHECKED
1. Check rear defogger switch, A/C switch and intake switch LEDs illumination.
2. Check indicator LEDs illumination.
OK or NG
OK >> GO TO 3.
NG >>  Does not illuminate rear defogger switch, A/C switch
and intake switch LEDs illumination. Refer to HAC-
311, "Self-Diagnosis".
3.STEP-2: CHECK TO ADVANCE SELF-DIAGNOSIS STEP-2
Turn blower control dial to AUTO position.
CAUTION:
When switched to STEP-2, LEDs of FRE and REC position blinks for approximately 5 seconds.
Check intake switch (FRE, REC) indicator LEDs illumination
OK >> GO TO 4.
NG >> Replace front air control (Blower control dial is malfunctioning.)
4.CHECK TO RETURN SELF-DIAGNOSIS STEP-1
Turn blower control dial to OFF position.
Return to self
-diagnosis STEP-1?
YES >> GO TO 5.
NO >> Replace front air control (Blower control dial is malfunctioning.)
5.STEP-2: SENSOR CIRCUIT ARE CHECKED
1. Turn blower control dial to AUTO position.
CAUTION:
When switched to STEP-2, LEDs of FRE and REC position blinks for approximately 5 seconds.
2. Check intake switch (FRE, REC) indicator LEDs illumination.
OK or NG
OK >> GO TO 6.
NG >> GO TO 9.
6.STEP-3: AIR MIX DOOR AND MODE DOOR MOTOR ARE CHECKED
AWIIA0327GB
AWIIA0328GB

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

HAC-240
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
MAGNET CLUTCH
1. Turn ignition switch OFF.
2. Disconnect A/C compressor connector.
3. Start the engine.
4. Press AUTO switch and A/C switch ON.
5. Check voltage between A/C compressor harness connector F3
terminal 1 and ground.
Is the inspection result normal
YES >> Replace A/C compressor. Refer to XX.
NO >> Check 10A fuse (No. 42), located in the IPDM ER.
 If fuse is OK, GO TO 4.
 If fuse is NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
4.CHECK MAGNET CLUTCH
Check for operation sound when applying battery voltage direct cur-
rent to terminal.
Is the inspection result normal?
OK >> GO TO 5.
NO >> Replace A/C compressor. Refer to XX.
5.CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between A/C compressor harness connector
F3 (A) terminal 1 and IPDM E/R harness connector E43 (B) ter-
minal 11.
Is the inspection result normal
YES >> Replace IPDM E/R. Refer to XX.
NO >> Repair harness or connector.
6.CHECK BCM INPUT (A/C COMPRESSOR ON) SIGNAL
Check A/C compressor ON/OFF signal. Refer to HAC-212, "
CONSULT-III Function (BCM)".
Is the inspection result normal
YES >> GO TO 9.
NO >> GO TO 7.
7.CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND BCM.
Te r m i n a l s
Voltag e
(Approx.) (+) (−)
Connector Terminal
Ground
Compressor: F3 1 12V
SJIA0743E
RJIA2005E
ABContinuity
Connector Terminal Connector Terminal
Ye s
Compressor: F3 1IPDM E/R:
E4311
AWIIA0305ZZ
A/C SW ON : AIR COND SW ON
A/C SW OFF : AIR COND SW OFF