2008 NISSAN TEANA sensor

HAC-100
< PRECAUTION >[WITHOUT 7 INCH DISPLAY]
PRECAUTIONS
CAUTION:
The new and former refrigerant connections use different O-ring configurations. Never confuse O-
rings since they are not interchangeable. Refrigerant may leak at the connection if a wrong O-ring is
installed.
O-Ring Part Numbers and Specifications
F. Former type refrigerant connection N. New type refrigerant connection
:O-ring size
JPIIA0453ZZ
Connection type Piping connection point Part number QTY O-ring size
NewLow-pressure flexible hose to low-pressure pipe 92474 N8210 1 19
High-pressure pipe to condenser pipe assembly (Outlet) 92471 N8210 1 8
Condenser pipe assembly (Inlet) to high-pressure flexible
hose (One-touch joint)92472 N8210 1 12
Condenser assembly to condenser pipe as-
semblyInlet 92472 N8210 1 12
Outlet 92471 N8210 1 8
Low-pressure pipe to expansion valve 92473 N8210 1 16
High-pressure pipe to expansion valve 92471 N8210 1 8
Compressor to low-pressure flexible hose 92474 N8210 1 19
Compressor to high-pressure flexible hose 92472 N8210 1 12
Liquid tank to condenser assemblyInlet
92471 N82101
8
Outlet 1
FormerRefrigerant pressure sensor to liquid tank J2476 89956 1 10
Expansion valve to evaporator pipe assemblyInlet 92475 71L00 1 12
Outlet 92475 72L00 1 16
Evaporator to evaporator pipe assemblyInlet 92475 71L00 1 12
Outlet 92475 72L00 1 16

HAC-116
< BASIC INSPECTION >[WITH 7 INCH DISPLAY]
INSPECTION AND ADJUSTMENT
When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of the intake switch memory function may be cancelled.
WITH INTELLIGENT AIR CONDITIONER SYSTEM : Gas Sensor Sensitivity Adjust-
ment Function (With Intelligent Air Conditioner System)
INFOID:0000000003884691
DESCRIPTION
According to customer’s sense of smell, gas sensor sensitivity can be changed.
HOW TO SET
Using CONSULT-III, perform “GAS SENSOR ADJUSTMENT” on “WORK SUPPORT” of HVAC.
NOTE:
When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of the intake switch memory function may be cancelled.
WITH INTELLIGENT AIR CONDITIONER SYSTEM : Clean Switch Interlocking Move-
ment Change Function (With Intelligent Air Conditioner System)
INFOID:0000000003884692
DESCRIPTION
Condition for interlocking movement of clean switch and A/C switch can be changed. In addition operation of
the clean switch, which activates the automatic re-circulation control system, can be set to become available
when the A/C switch is ON.
HOW TO SET
Using CONSULT-III, perform “CLEAN SW SET” on “WORK SUPPORT” of HVAC.
NOTE:
When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of the intake switch memory function may be cancelled.
Work support items Display Setting
GAS SENSOR ADJUSTMENT2 Less sensitive setting than display 1 (REC later than display 1.)
1 Less sensitive setting than normal setting (REC later than normal operation.)
0 (initial status) Normal
−1 More sensitive setting than normal setting (REC earlier than normal operation.)
−2 More sensitive setting than display −1 (REC earlier than display −1.)
Work support items Display setting
CLEAN SW SETMODE 1 Initial setting
MODE 2 Setting 1
MODE 3 Setting 2
MODE 4 Setting 3
Initial settingWhen the clean switch is ON, the A/C switch is also turned ON in synchronization with the clean switch.
Control of the clean switch is functional even when the A/C switch is turned OFF.
Setting 1When the clean switch is ON, the A/C switch is not turned ON in synchronization with the clean switch.
Control of the clean switch is functional even when the A/C switch is turned OFF.
Setting 2When the clean switch is ON, the A/C switch is also turned ON in synchronization with the clean switch.
When the A/C switch is turned OFF, the clean switch is turned OFF in synchronization with the A/C switch.
Setting 3Clean switch can be turned ON only when A/C switch is ON.
When the A/C switch is turned OFF, the clean switch is turned OFF in synchronization with the A/C switch.

COMPRESSOR CONTROL FUNCTION
HAC-119
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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HAC
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PASSENGER COMPARTMENT
1. Refrigerant pressure sensor 2. Compressor (magnet clutch) 3. Ambient sensor
JPIIA0992ZZ

HAC-120
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
COMPRESSOR CONTROL FUNCTION
Component’s Role
INFOID:0000000003884695
1. Intake door motor 2. Air mix door motor (passenger side) 3. Air mix door motor (driver side)
4. Mode door motor 5. Sunload sensor 6. In-vehicle sensor
7. A/C auto amp. 8. Intake sensor 9. Blower motor
JPIIA0993ZZ

COMPRESSOR CONTROL FUNCTION
HAC-121
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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Component Description
Refrigerant pressure sensorEC-348, "
Description"
CompressorHAC-197, "Description"
Ambient sensorHAC-166, "Description"
Intake door motorHAC-188, "Description"
Air mix door motor (driver side)HAC-181, "Description"
Air mix door motor (passenger side)HAC-183, "Description"
Mode door motorHAC-185, "Description"
Sunload sensorHAC-178, "Description"
In-vehicle sensorHAC-169, "Description"
A/C auto amp. HAC-192, "Description"
Intake sensorHAC-172, "Description"
Blower motorHAC-193, "Description"

HAC-122
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
AUTOMATIC AIR CONDITIONER SYSTEM
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : System Diagram
INFOID:0000000003884702
CONTROL SYSTEM
The control system consists of input sensors, switches, the A/C auto amp. (microcomputer) and outputs. The
relationship of these components is as shown in the figure below:
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : System Description
INFOID:0000000003884704
CONTROL OPERATION
Display
The operation status of the system is displayed on the screen.
JPIIA1020GB
JSIIA0058GB

AUTOMATIC AIR CONDITIONER SYSTEM
HAC-127
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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AIR CONDITIONER LAN CONTROL SYSTEM
The LAN (Local Area Network) system consists of the A/C auto amp., the mode door motor, the air mix door
motors and the intake door motor.
A configuration of these components is as shown in the figure below.
SYSTEM CONSTRUCTION
A small network exists between the A/C auto amp., the mode door motor, the air mix door motor and the intake
door motor. The A/C auto amp. and motors are connected by data transmission lines and motor power supply
lines. The LAN network is built through the ground circuits of each door motor.
Addresses, motor opening angle signals, motor stop signals and error checking messages are all transmitted
through the data transmission lines connecting the A/C auto amp. and each door motor.
The following functions are contained in LCUs built into the mode door motor, the air mix door motors and the
intake door motor.
 Address
 Motor opening angle signals
 Data transmission
 Motor stop and drive decision
 Opening angle sensor (PBR function)
 Comparison
JSIIA1189GB
JSIIA1129GB

HAC-128
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
 Decision (A/C auto amp. indicated value and motor opening angle comparison)
Operation
The A/C auto amp. receives data from each of the sensors. The A/C auto amp. sends mode door, the air mix
door and the intake door opening angle data to the mode door motor LCU, the air mix door motor LCUs and
the intake door motor LCU.
The mode door motor, the air mix door motors and the intake door motor read their respective signals accord-
ing to the address signal. Opening angle indication signals received from the A/C auto amp. and each of the
motor position sensors is compared by the LCUs in each door motor with the existing decision and opening
angles. Next, HOT/COLD, DEF/VENT, OPEN/SHUT or FRE/REC operation is selected. The new selection
data is returned to the A/C auto amp.
Transmission Data and Transmission Order
A/C auto amp. data is transmitted consecutively to each of the door motors following the form as shown in the
figure below.
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:
JSIIA1130GB
JSIIA1131GB