2008 NISSAN TEANA Service Manual

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Page 2753 of 5121

NISSAN TEANA 2008 Service Manual AUTOMATIC AIR CONDITIONER SYSTEM
HAC-125
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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DISCHARGE AIR FLOW
JPIIA0884GB

Page 2754 of 5121

NISSAN TEANA 2008 Service Manual HAC-126
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
AIR DISTRIBUTION
SWITCHES AND THEIR CONTROL FUNCTION
JPIIA0877GB
JPIIA0885GB

Page 2755 of 5121

NISSAN TEANA 2008 Service Manual AUTOMATIC AIR CONDITIONER SYSTEM
HAC-127
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AIR CONDITIONER LAN CONTROL SYSTEM
The LAN (Local Area Network) system consists of

Page 2756 of 5121

NISSAN TEANA 2008 Service Manual 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

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

Page 2757 of 5121

NISSAN TEANA 2008 Service Manual 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 mal

Page 2758 of 5121

NISSAN TEANA 2008 Service Manual HAC-130
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
PASSENGER COMPARTMENT
1. Refrigerant pressure sensor 2. Compressor (magnet clutch) 3. Ambient sensor
JPIIA0992ZZ

Page 2759 of 5121

NISSAN TEANA 2008 Service Manual AUTOMATIC AIR CONDITIONER SYSTEM
HAC-131
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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1. Intake door motor 2. Air mix door motor (passenger side) 3. Air mix door motor

Page 2760 of 5121

NISSAN TEANA 2008 Service Manual HAC-132
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : Component Description
INFOID:0000000003884707
WITH INTELLIGENT AIR CON

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