2008 NISSAN TEANA Service Manual

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Page 2649 of 5121

NISSAN TEANA 2008 Service Manual AUTOMATIC AIR CONDITIONER SYSTEM
HAC-21
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AIR DISTRIBUTION
SWITCHES AND THEIR CONTROL FUNCTION
JPIIA0877GB
JPIIA0885GB

Page 2650 of 5121

NISSAN TEANA 2008 Service Manual HAC-22
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AUTOMATIC AIR CONDITIONER SYSTEM
AIR CONDITIONER LAN CONTROL SYSTEM
The LAN (Local Area Network) system consists of the A/C auto amp., the mode do

Page 2651 of 5121

NISSAN TEANA 2008 Service Manual AUTOMATIC AIR CONDITIONER SYSTEM
HAC-23
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Decision (A/C auto amp. indicated value and motor opening angle comparison)
Op

AUTOMATIC AIR CONDITIONER SYSTEM
HAC-23
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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 2652 of 5121

NISSAN TEANA 2008 Service Manual HAC-24
< FUNCTION DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
At the end of each transmission, a stop operation, in-operation, or internal malfunction message is delivered
t

Page 2653 of 5121

NISSAN TEANA 2008 Service Manual AUTOMATIC AIR CONDITIONER SYSTEM
HAC-25
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PASSENGER COMPARTMENT
1. Refrigerant pressure sensor 2. Compressor (magnet clutc

Page 2654 of 5121

NISSAN TEANA 2008 Service Manual HAC-26
< FUNCTION DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
AUTOMATIC AIR CONDITIONER SYSTEM
Component Description
INFOID:0000000003846304
1. Intake door motor 2. Air mix door motor (passenger side) 3. Air

Page 2655 of 5121

NISSAN TEANA 2008 Service Manual AUTOMATIC AIR CONDITIONER SYSTEM
HAC-27
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Component Description
Refrigerant pressure sensorEC-348, "
Description"
Compress

Page 2656 of 5121

NISSAN TEANA 2008 Service Manual HAC-28
< FUNCTION DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
MODE DOOR CONTROL SYSTEM
MODE DOOR CONTROL SYSTEM
System DiagramINFOID:0000000003846309
System DescriptionINFOID:0000000003846310
The mode door is

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