2008 NISSAN TEANA engine

INSPECTION AND ADJUSTMENT
HAC-113
< BASIC INSPECTION >[WITH 7 INCH DISPLAY]
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1. Press the intake switch. Indicator is turned ON (REC).
2. Press the intake switch again. Indicator is turned OFF (FRE).
3. Listen for the intake door position change. (Slight change of blower sound can be heard.)
NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and the intake door position is at
the FRE when the DEF is selected.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Intake door system malfunction: HAC-189, "
Diagnosis Procedure".
5.CHECK A/C SWITCH
1. Press the A/C switch.
2. The A/C switch indicator is turned ON.
Confirm that the compressor clutch engages (sound or visual inspection).
Is the inspection result normal?
YES >> GO TO 6.
NO >> Magnet clutch system malfunction: HAC-197, "
Diagnosis Procedure".
6.CHECK WITH TEMPERATURE SETTING LOWERED
1. Operate the compressor.
2. Operate the temperature control dial (driver side) and lower the temperature setting to 18°C (60°F).
3. Check that the cool air blows from the outlets.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Insufficient cooling: HAC-228, "
Inspection procedure".
7.CHECK WITH TEMPERATURE SETTING RAISED
1. Operate the temperature control dial (driver side) and raise the temperature setting to 32°C (90°F) after
warming up the engine.
2. Check that the warm air blows from the outlets.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Insufficient heating: HAC-231, "
Inspection procedure".
8.CHECK LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM FUNC-
TION
1. Press the DUAL switch, and then check that “DUAL” is shown on the display.
2. Operate the temperature control dial (driver side). Check that the discharge air temperature (driver side)
changes.
3. Operate the temperature control dial (passenger side). Check that the discharge air temperature (passen-
ger side) changes.
4. Press the DUAL switch, and then check that the temperature setting (LH/RH) is unified to the driver side
temperature setting.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Refer to HAC-226, "
Diagnosis Chart By Symptom" and perform the appropriate diagnosis.
9.CHECK AUTO MODE
1. Press the AUTO switch, and then check that “AUTO” is shown on the display.
2. Operate the temperature control dial (driver side). Check that the fan speed or outlet changes (the dis-
charge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera-
ture, and temperature setting).
Is the inspection result normal?
YES >> GO TO 10.
NO >> Refer to HAC-226, "
Diagnosis Chart By Symptom" and perform the appropriate diagnosis.
10.CHECK PLASMACLUSTER ION CONTROL FUNCTION
1. Turn ignition switch OFF and restart the engine.

HAC-114
< BASIC INSPECTION >[WITH 7 INCH DISPLAY]
INSPECTION AND ADJUSTMENT
2. Ion indicator is shown on the display.
3. Press OFF switch.
4. Ion indicator is turned OFF.
Is the inspection result normal?
YES >> GO TO 11.
NO >> Refer to HAC-227, "
WITH INTELLIGENT AIR CONDITIONER SYSTEM : Inspection procedure".
11 .CHECK ION CONTROL MODE
1. Turn ignition switch OFF and restart the engine.
2. Turn fan control dial clockwise.
3. Ion indicator (blue) is turned ON.
4. Ion indicator (blue) changes to ion indicator (green) after approximately 15 minutes.
5. Ion indicator (green) changes to ion indicator (blue) after approximately 15 minutes.
6. Press CLEAN switch.
7. Ion indicator (blue) changes to ion indicator (green) after approximately 30 minutes.
8. Ion indicator (green) changes to ion indicator (blue) after approximately 15 minutes.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace unified meter and A/C amp.
WITH INTELLIGENT AIR CONDITIONER SYSTEM : Temperature Setting Trimmer
INFOID:0000000003888718
DESCRIPTION
If the temperature felt by the customer is different than the air flow temperature controlled by the temperature
setting, the A/C auto amp. control temperature can be adjusted to compensate for the temperature setting.
HOW TO SET
Using CONSULT-III, perform “TEMP SET CORRECT” on “WORK SUPPORT” of HVAC.
NOTE:
 When the temperature setting is set to 25.0°C (77°F) and −3.0°C (−6°F), the temperature controlled by A/C
auto amp. is 25.0°C (77°F) −3.0°C (6°F) = 22.0°C (71°F) and the temperature becomes lower than the tem-
perature setting.
 When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10
V or less, trimmer operation is canceled. Temperature set becomes that of initial condition.
WITH INTELLIGENT AIR CONDITIONER SYSTEM : Foot Position Setting Trimmer
INFOID:0000000003888719
DESCRIPTION
Work support items Display (°F) Display (°C)
TEMP SET CORRECT63.0
52.5
42.0
31.5
21.0
10.5
0 (initial status) 0 (initial status)
−1−0.5
−2−1.0
−3−1.5
−4−2.0
−5−2.5
−6−3.0

COMPRESSOR CONTROL FUNCTION
HAC-117
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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FUNCTION DIAGNOSIS
COMPRESSOR CONTROL FUNCTION
DescriptionINFOID:0000000003943704
PRINCIPLE OF OPERATION
Compressor is not activated.
Functional circuit diagram
Functional initial inspection chart
CAN (1) : A/C switch signal
: Blower fan motor switch signalCAN (2) : A/C Compressor request signal
JPIIA0484GB
Control unit Diagnosis ItemLocation
ABCD
A/C auto amp.
“HVAC”Self-diagnosis Yes
Data monitor Yes
Active test Yes Yes
ECM
“ENGINE”Self-diagnosis
(CAN system diagnosis)Ye s
Data monitor Yes Yes
IPDM E/R“IPDM E/R”Self-diagnosis
(CAN system diagnosis)Ye s
Data monitor Yes
Auto active testYe s

HAC-118
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
COMPRESSOR CONTROL FUNCTION
Fail-Safe
INFOID:0000000003926398
FAIL-SAFE FUNCTION
If a communication error exists between the A/C auto amp., and the AV control unit and preset switch for 30
seconds or longer, air conditioner is controlled under the following conditions:
Component Part LocationINFOID:0000000003884694
ENGINE COMPARTMENT
Compressor : ON
Air outlet : AUTO
Air inlet : FRE (Fresh)
Blower fan speed : AUTO
Set temperature : Setting before communication error occurs

AUTOMATIC AIR CONDITIONER SYSTEM
HAC-129
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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 At the end of each transmission, a stop operation, in-operation, or internal malfunction message is delivered
to the A/C auto amp. This completes one data transmission and control cycle.
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : Component Part Location
INFOID:0000000003884706
ENGINE COMPARTMENT
JSIIA1132GB

HAC-138
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
START: Initial compulsory signal is sent to each of the door motors.
ADDRESS: Data sent from the A/C auto amp. is selected according to data-based decisions made by the mode door
motor, the air mix door motors and the intake door motor.
 If the addresses are identical, the opening angle data and error check signals are received by the door motor
LCUs. The LCUs then make the appropriate error decision. If the opening angle data has no error, door con-
trol begins.
 If an error exists, the received data is rejected and the corrected data received. Finally, door control is based
upon the corrected opening angle data.
OPENING ANGLE:
 Data that shows the indicated door opening angle of each door motor.
ERROR CHECK: In this procedure, transmitted and received data is checked for errors. Error data is then compiled. The error
check prevents corrupted data from being used by the mode door motor, the air mix door motors and the
intake door motor. Error data can be related to the following symptoms.
- Malfunction of electrical frequency
- Poor electrical connections
- Signal leakage from transmission lines
- Signal level fluctuation
STOP SIGNAL:
 At the end of each transmission, a stop operation, in-operation, or internal malfunction message is delivered
to the A/C auto amp. This completes one data transmission and control cycle.
WITH INTELLIGENT AIR CONDITIONER SYSTEM : Component Part Location
INFOID:0000000003885178
ENGINE COMPARTMENT
JSIIA1132GB

HAC-152
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
BLOWER MOTOR CONTROL SYSTEM
BLOWER MOTOR CONTROL SYSTEM
System DiagramINFOID:0000000003884727
System DescriptionINFOID:0000000003884728
Blower speed is automatically controlled by the temperature setting, ambient temperature, in-vehicle tempera-
ture, intake temperature, amount of sunload and air mix door position.
By pressing the AUTO switch, the blower motor starts to gradually increase air flow volume.
When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flow-
ing.
SYSTEM OPERATION
System Operation
 For air flow, the manual selection (1-7) with the fan control dial has priority.
 If the AUTO switch is pressed or if the DEF switch is pressed while in the OFF condition, it changes to the
automatic control by A/C auto amp.
 When increasing the air flow, it changes the duty ratio of the blower motor drive signal to prevent the air flow
from suddenly increasing.
 There are the following types of air flow control: starting air flow control, starting air flow control at low cool-
ant temperature, starting air flow control at high in-vehicle temperature, and air flow control at actuator oper-
ation in addition to manual control, normal automatic air flow control.
Normal Automatic Air Flow Control
 When the target temperature is set by the temperature control dial of A/C control, the A/C auto amp. per-
forms the calculation and decides the target according to the signal from each sensor.
 The A/C auto amp. changes the duty ratio of blower motor drive signal and controls the air flow continuously
so that the air flow becomes the target air flow.
 The minimum air flow will change according to the sunload when the air discharge outlet is VENT or B/L.
Fan Speed Control Specification
JPIIA0502GB
JPIIA0635GB

BLOWER MOTOR CONTROL SYSTEM
HAC-153
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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 When starting the automatic control of air flow, the system gradually increases the duty ratio of the blower
motor drive signal to prevent too much air from blowing.
 The time period from when the air flow changes from LO to HI is approximately 8 seconds.
 It becomes the starting air flow control at low coolant temperature according to the calculation result of the A/
C auto amp. and engine coolant temperature [approximately 56°C (133°F) or less] during the automatic air
flow control.
 Do not perform the starting air flow control when the air discharge outlet is set to DEF.
Starting Fan Speed Control
Start up from COLD SOAK Condition (Automatic mode)
In cold start up condition where the engine coolant temperature is below 56°C (133°F), the blower does not
operate for a short period of time (up to 150 seconds). The exact start delay time varies depending on the
ambient temperature and engine coolant temperature.
In the most extreme case (very low ambient temperature) the blower start delay is 150 seconds as described
above. After this delay, the blower will operate at low speed until the engine coolant temperature rises above
56°C (133°F), and then the blower speed increases to the objective speed.
Start up from usual or HOT SOAK Condition (Automatic mode)
The blower will begin operation momentarily after the AUTO switch is pressed. The blower speed rises gradu-
ally to the objective speed over a time period of 3 seconds or less (actual time depends on the objective
blower speed).