Page 2785 of 5121
![NISSAN TEANA 2008 Service Manual DIAGNOSIS SYSTEM (HVAC)
HAC-157
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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HAC
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HAC-157
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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*: Perform self-diagnosis under sunshine. When performing indoors, aim a light (more than 6](/manual-img/5/57391/w960_57391-2784.png)
DIAGNOSIS SYSTEM (HVAC)
HAC-157
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
C
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K
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MA
B
HAC
N
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*: Perform self-diagnosis under sunshine. When performing indoors, aim a light (more than 60 W) at sunload sensor, otherwise self-diag-
nosis indicates even though the sunload sensor is functioning normally.
DATA MONITOR
Display item list
B2634 PASS AIRMIX ACTR (SHORT)Air mix door PBR (passenger side) po-
sition 5% or less Air mix door motor (passenger
side)
A/C auto amp.
Harness and connector
(CAN communication line is open
or shorted)
(Air mix door motor is open or
shorted) B2635 PASS AIRMIX ACTR (OPEN)Air mix door PBR (passenger side) po-
sition 95% or more
B2636 DR VENT DOOR FAILWhen the malfunctioning door position
is detected at VENT position
Mode door motor
A/C auto amp.
Harness and connector
(CAN communication line is open
or shorted)
(Mode door motor is open or
shorted) B2637 DR B/L DOOR FAILWhen the malfunctioning door position
is detected at B/L position
B2638 DR D/F1 DOOR FAILWhen the malfunctioning door position
is detected at FOOT position
B2639 DR DEF DOOR FAILWhen the malfunctioning door position
is detected at DEF position
B263D FRE DOOR FAILWhen the malfunctioning intake door
position is detected at FRE position Intake door motor
A/C auto amp.
Harness and connector
(CAN communication line is open
or shorted)
(Intake door motor is open or
shorted) B263E 20P FRE DOOR FAILWhen the malfunctioning intake door
position is detected at 20%FRE posi-
tion
B263F REC DOOR FAILWhen the malfunctioning intake door
position is detected at REC position
B2654 D/F2 DOOR FAILWhen the malfunctioning door position
is detected at D/F position Mode door motor
A/C auto amp.
Harness and connector
(CAN communication line is open
or shorted)
(Mode door motor is open or
shorted) B2655 B/L2 DOOR FAILWhen the malfunctioning door position
is detected at B/L2 position
B2656 BTC FRE DOOR FAILWhen the malfunctioning intake door
position is detected Intake door motor
A/C auto amp.
Harness and connector
(CAN communication line is open
or shorted)
(Intake door motor is open or
shorted) DTCItems
(CONSULT-III screen terms)Diagnostic item is detected when... Possible cause
Monitor item [Unit] Description
COMP REQ SIG [On/Off] Displays A/C switch ON/OFF status transmitted to other units via CAN communication
FAN REQ SIG [On/Off]Displays blower switch ON/OFF status transmitted to other units via CAN communica-
tion
AMB TEMP SEN [°C]Ambient sensor value converted from ambient sensor signal received from ambient
sensor
IN-VEH TEMP [°C]In-vehicle sensor value converted from in-vehicle sensor signal received from in-vehi-
cle sensor
INT TEMP SEN [°C] Intake sensor value converted from intake sensor signal received from intake sensor
SUNLOAD SEN
[w/m
2]Sunload sensor value converted from sunload sensor signal received from sunload
sensor
AMB SEN CAL [°C] Ambient sensor value calculated by A/C auto amp.
IN-VEH CAL [°C] In-vehicle sensor value calculated by A/C auto amp.
Page 2786 of 5121
![NISSAN TEANA 2008 Service Manual HAC-158
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
ACTIVE TEST
HVAC TEST
NOTE:
Perform the inspection of each output device after starting the engine because the compressor NISSAN TEANA 2008 Service Manual HAC-158
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
ACTIVE TEST
HVAC TEST
NOTE:
Perform the inspection of each output device after starting the engine because the compressor](/manual-img/5/57391/w960_57391-2785.png)
HAC-158
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
ACTIVE TEST
HVAC TEST
NOTE:
Perform the inspection of each output device after starting the engine because the compressor is operated.
When choosing to “MODE 7”, error message is displayed but it is not malfunction.
WORK SUPPORT
INT TEMP CAL [°C] Intake sensor value calculated by A/C auto amp.
SUNL SEN CAL
[w/m
2]Sunload sensor value calculated by A/C auto amp.
FAN DUTY [%] Duty ratio of blower motor judged by A/C auto amp.
XMTarget discharge air temperature judged by A/C auto amp. according to the tempera-
ture setting and the value from each sensor
ENG COOL TEMP [°C] Water temperature signal value received from ECM via CAN communication
VEHICLE SPEED[Mph
(km/h)]Vehicle speed signal value received from meter via CAN communication Monitor item [Unit] Description
Test item Description
ALL SEG NOTE:
Item can be displayed but cannot be tested.
When choosing to turn “ALL SEG” on, error message is displayed but it is not malfunction.
HVAC TESTThe operation check of A/C system can be performed by selecting the mode. Refer to the fol-
lowing table for the conditions of each mode.
Te s t i t e m
MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 MODE 7
Mode door position VENT B/L1 B/L2 AUTO FOOT D/F DEF -
Intake door position REC REC 20% FRE FRE FRE FRE -
Air mix door position
(driver & passenger
side)FULL COLD FULL COLD FULL HOT FULL HOT FULL HOT FULL HOT -
Blower motor duty ratio 37% 91% 65% 65% 65% 91% -
Compressor (Magnet
clutch)ON ON OFF OFF ON ON -
Work item Description Reference
TEMP SET CORRECTIf the temperature felt by the customer is different than the air flow
temperature controlled by the temperature setting, the auto ampli-
fier control temperature can be adjusted to compensate for the
temperature setting. HAC-110, "
WITHOUT
INTELLIGENT AIR
CONDITIONER SYS-
TEM : Temperature Set-
ting Trimmer"
BLOW SETIn the FOOT mode, the air blowing to the DEF can change ON/
OFF. HAC-110, "
WITHOUT
INTELLIGENT AIR
CONDITIONER SYS-
TEM : Foot Position Set-
ting Trimmer"
Page 2787 of 5121
![NISSAN TEANA 2008 Service Manual DIAGNOSIS SYSTEM (HVAC)
HAC-159
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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B
HAC
N
O
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NOTE:
When the battery cable is disconnected from the negative terminal or when the battery NISSAN TEANA 2008 Service Manual DIAGNOSIS SYSTEM (HVAC)
HAC-159
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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HAC
N
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NOTE:
When the battery cable is disconnected from the negative terminal or when the battery](/manual-img/5/57391/w960_57391-2786.png)
DIAGNOSIS SYSTEM (HVAC)
HAC-159
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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HAC
N
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NOTE:
When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of WORK SUPPORT may be cancelled.
WITH INTELLIGENT AIR CONDITIONER SYSTEM
WITH INTELLIGENT AIR CONDITIONER SYSTEM : CONSULT-III Function
INFOID:0000000003884733
CONSULT-III can display each diagnosis item using the diagnosis test modes shown as per the following.
CONSULT-III application items
SELF DIAGNOSTIC RESULT
Refer to HAC-224, "WITH INTELLIGENT AIR CONDITIONER SYSTEM : DTC Index".
Display Item List
FRE MEMORY SET If the ignition switch is turned to the OFF position while the FRE
switch is set to ON (fresh air intake), “Perform the memory” or
“Do not perform the memory” of the FRE switch ON (fresh air in-
take) condition can be selected.
If “Perform the memory” was set, the FRE switch will be ON
(fresh air intake) when turning the ignition switch to the ON posi-
tion again.
If “Do not perform the memory” was set, the air inlets will be con-
trolled automatically when turning the ignition switch to the ON
position again. HAC-111, "
WITHOUT IN-
TELLIGENT AIR CON-
DITIONER SYSTEM :
Inlet Port Memory Func-
tion (FRE)"
REC MEMORY SET If the ignition switch is turned to the OFF position while the REC
switch is set to ON (recirculation), “Perform the memory” or “Do
not perform the memory” of the REC switch ON (recirculation)
condition can be selected.
If “Perform the memory” was set, the REC switch will be ON (re-
circulation) when turning the ignition switch to the ON position
again.
If “Do not perform the memory” was set, the air inlets will be con-
trolled automatically when turning the ignition switch to the ON
position again. HAC-111, "
WITHOUT IN-
TELLIGENT AIR CON-
DITIONER SYSTEM :
Inlet Port Memory Func-
tion (REC)"
Work item Description Reference
Diagnosis mode Description
ECU Identification Displays the A/C auto amp. number.
Self Diagnostic Result Displays the diagnosis results judged by A/C auto amp.
Data Monitor Displays A/C auto amp. input/output data in real time.
Active Test The signals used to activate each device are forcibly supplied from A/C auto amp.
Work SupportChanges the setting for each system function.
Temperature setting trimmer
Inlet port memory function (FRE)
Inlet port memory function (REC)
Foot position setting trimmer
Gas sensor sensitivity adjustment function
Clean switch interlocking movement change function
DTCItems
(CONSULT-III screen terms)Diagnostic item is detected when... Possible cause
U1000 CAN COMM CIRCUITWhen A/C auto amp. is not transmitting
or receiving CAN communication signal
for 2 or more seconds.CAN communication system
U1010 CONTROL UNIT (CAN)When detecting error during the initial
diagnosis of CAN controller of A/C auto
amp.A/C auto amp.
Page 2788 of 5121
![NISSAN TEANA 2008 Service Manual HAC-160
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
B257B AMB TEMP SEN (SHORT)Detected temperature at ambient sen-
sor −44°C (−47°F) or less Ambient sensor
A/C auto am NISSAN TEANA 2008 Service Manual HAC-160
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
B257B AMB TEMP SEN (SHORT)Detected temperature at ambient sen-
sor −44°C (−47°F) or less Ambient sensor
A/C auto am](/manual-img/5/57391/w960_57391-2787.png)
HAC-160
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
B257B AMB TEMP SEN (SHORT)Detected temperature at ambient sen-
sor −44°C (−47°F) or less Ambient sensor
A/C auto amp.
Harness and connector
(Ambient sensor circuit is open,
or there is a short in the circuit) B257C AMB TEMP SEN (OPEN)Detected temperature at ambient sen-
sor 100°C (212°F) or more
B2578IN CAR SENSOR (OUT OF RANGE
[LOW])Detected temperature at in-vehicle sen-
sor −44°C (−47°F) or less In-vehicle sensor
A/C auto amp.
Harness and connector
(In-vehicle sensor circuit is open,
or there is a short in the circuit) B2579IN CAR SENSOR (OUT OF RANGE
[HI])Detected temperature at in-vehicle sen-
sor 100°C (212°F) or more
B2581 EVAP TEMP SEN (SHORT)Detected temperature at intake sensor
−33°C (−27°F) or less Intake sensor
A/C auto amp.
Harness and connector
(Intake sensor circuit is open, or
there is a short in the circuit) B2582 EVAP TEMP SEN (OPEN)Detected temperature at intake sensor
69°C (156°F) or more
B262A GAS SENSOR (SHORT) Gas sensor duty 10% or less Gas sensor
A/C auto amp.
Harness and connector
(Gas sensor circuit is open, or
there is a short in the circuit) B262B GAS SENSOR (OPEN) Gas sensor duty 90% or more
B2630
*SUNLOAD SEN (SHORT)Detected calorie at sunload sensor 64.7
w/m2 (30 kcal/m2·h) or less Sunload sensor
A/C auto amp.
Harness and connector
(Sunload sensor circuit is open,
or there is a short in the circuit) B2631
*SUNLOAD SEN (OPEN)Detected calorie at sunload sensor
2832 w/m2 (1304 kcal/m2·h) or more
B2632 DR AIRMIX ACTR (SHORT)Air mix door PBR (driver side) position
5% or less Air mix door motor (driver side)
A/C auto amp.
Harness and connector
(CAN communication line is open
or shorted)
(Air mix door motor is open or
shorted) B2633 DR AIRMIX ACTR (OPEN)Air mix door PBR (driver side) position
95% or more
B2634 PASS AIRMIX ACTR (SHORT)Air mix door PBR (passenger side) po-
sition 5% or less Air mix door motor (passenger
side)
A/C auto amp.
Harness and connector
(CAN communication line is open
or shorted)
(Air mix door motor is open or
shorted) B2635 PASS AIRMIX ACTR (OPEN)Air mix door PBR (passenger side) po-
sition 95% or more
B2636 DR VENT DOOR FAILWhen the malfunctioning door position
is detected at VENT position
Mode door motor
A/C auto amp.
Harness and connector
(CAN communication line is open
or shorted)
(Mode door motor is open or
shorted) B2637 DR B/L DOOR FAILWhen the malfunctioning door position
is detected at B/L position
B2638 DR D/F1 DOOR FAILWhen the malfunctioning door position
is detected at FOOT position
B2639 DR DEF DOOR FAILWhen the malfunctioning door position
is detected at DEF position
B263D FRE DOOR FAILWhen the malfunctioning intake door
position is detected at FRE position Intake door motor
A/C auto amp.
Harness and connector
(CAN communication line is open
or shorted)
(Intake door motor is open or
shorted) B263E 20P FRE DOOR FAILWhen the malfunctioning intake door
position is detected at 20%FRE posi-
tion
B263F REC DOOR FAILWhen the malfunctioning intake door
position is detected at REC position DTCItems
(CONSULT-III screen terms)Diagnostic item is detected when... Possible cause
Page 2789 of 5121
![NISSAN TEANA 2008 Service Manual DIAGNOSIS SYSTEM (HVAC)
HAC-161
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
C
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K
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MA
B
HAC
N
O
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*: Perform self-diagnosis under sunshine. When performing indoors, aim a light (more than 6 NISSAN TEANA 2008 Service Manual DIAGNOSIS SYSTEM (HVAC)
HAC-161
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
C
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G
H
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K
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HAC
N
O
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*: Perform self-diagnosis under sunshine. When performing indoors, aim a light (more than 6](/manual-img/5/57391/w960_57391-2788.png)
DIAGNOSIS SYSTEM (HVAC)
HAC-161
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
MA
B
HAC
N
O
P
*: Perform self-diagnosis under sunshine. When performing indoors, aim a light (more than 60 W) at sunload sensor, otherwise self-diag-
nosis indicates even though the sunload sensor is functioning normally.
DATA MONITOR
Display item list
ACTIVE TEST
B2654 D/F2 DOOR FAILWhen the malfunctioning door position
is detected at D/F position Mode door motor
A/C auto amp.
Harness and connector
(CAN communication line is open
or shorted)
(Mode door motor is open or
shorted) B2655 B/L2 DOOR FAILWhen the malfunctioning door position
is detected at B/L2 position
B2656 BTC FRE DOOR FAILWhen the malfunctioning intake door
position is detected Intake door motor
A/C auto amp.
Harness and connector
(CAN communication line is open
or shorted)
(Intake door motor is open or
shorted)
B2657 GAS SENSOR CIRCUIT (SHORT) Gas sensor duty 0% Gas sensor
A/C auto amp.
Harness and connector
(Gas sensor circuit is open, or
there is a short in the circuit) B2658 GAS SENSOR CIRCUIT (OPEN) Gas sensor duty 100% DTCItems
(CONSULT-III screen terms)Diagnostic item is detected when... Possible cause
Monitor item [Unit] Description
COMP REQ SIG [On/Off] Displays A/C switch ON/OFF status transmitted to other units via CAN communication
FAN REQ SIG [On/Off]Displays blower switch ON/OFF status transmitted to other units via CAN communica-
tion
AMB TEMP SEN [°C]Ambient sensor value converted from ambient sensor signal received from ambient
sensor
IN-VEH TEMP [°C]In-vehicle sensor value converted from in-vehicle sensor signal received from in-vehi-
cle sensor
INT TEMP SEN [°C] Intake sensor value converted from intake sensor signal received from intake sensor
SUNLOAD SEN
[w/m
2]Sunload sensor value converted from sunload sensor signal received from sunload
sensor
AMB SEN CAL [°C] Ambient sensor value calculated by A/C auto amp.
IN-VEH CAL [°C] In-vehicle sensor value calculated by A/C auto amp.
INT TEMP CAL [°C] Intake sensor value calculated by A/C auto amp.
SUNL SEN CAL
[w/m
2]Sunload sensor value calculated by A/C auto amp.
FAN DUTY [%] Duty ratio of blower motor judged by A/C auto amp.
XMTarget discharge air temperature judged by A/C auto amp. according to the tempera-
ture setting and the value from each sensor
ENG COOL TEMP [°C] Water temperature signal value received from ECM via CAN communication
VEHICLE SPEED[Mph
(km/h)]Vehicle speed signal value received from meter via CAN communication
Test item Description
ALL SEGNOTE:
Item can be displayed but cannot be tested.
When choosing to turn “ALL SEG” on, error message is displayed but it is not malfunction.
HVAC TESTThe operation check of A/C system can be performed by selecting the mode. Refer to the fol-
lowing table for the conditions of each mode.
Page 2790 of 5121
![NISSAN TEANA 2008 Service Manual HAC-162
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
HVAC TEST
NOTE:
Perform the inspection of each output device after starting the engine because the compressor is operated. NISSAN TEANA 2008 Service Manual HAC-162
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
HVAC TEST
NOTE:
Perform the inspection of each output device after starting the engine because the compressor is operated.](/manual-img/5/57391/w960_57391-2789.png)
HAC-162
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
DIAGNOSIS SYSTEM (HVAC)
HVAC TEST
NOTE:
Perform the inspection of each output device after starting the engine because the compressor is operated.
When choosing to “MODE 7”, error message is displayed but it is not malfunction.
WORK SUPPORT
Te s t i t e m
MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 MODE 7
Mode door position VENT B/L1 B/L2 AUTO FOOT D/F DEF -
Intake door position REC REC 20% FRE FRE FRE FRE -
Air mix door position
(driver & passenger
side)FULL COLD FULL COLD FULL HOT FULL HOT FULL HOT FULL HOT -
Blower motor duty ratio 37% 91% 65% 65% 65% 91% -
Compressor (Magnet
clutch)ON ON OFF OFF ON ON -
Ionizer ON ON ON ON ON OFF -
Ion mode ION ION CLEAN CLEAN ION - -
Work item Description Reference
TEMP SET CORRECTIf the temperature felt by the customer is different than the air flow
temperature controlled by the temperature setting, the auto ampli-
fier control temperature can be adjusted to compensate for the
temperature setting. HAC-114, "
WITH INTEL-
LIGENT AIR CONDI-
TIONER SYSTEM :
Temperature Setting
Trimmer"
BLOW SETIn the FOOT mode, the air blowing to the DEF can change ON/
OFF. HAC-114, "
WITH INTEL-
LIGENT AIR CONDI-
TIONER SYSTEM : Foot
Position Setting Trim-
mer"
FRE MEMORY SET If the ignition switch is turned to the OFF position while the FRE
switch is set to ON (fresh air intake), “Perform the memory” or
“Do not perform the memory” of the FRE switch ON (fresh air in-
take) condition can be selected.
If “Perform the memory” was set, the FRE switch will be ON
(fresh air intake) when turning the ignition switch to the ON posi-
tion again.
If “Do not perform the memory” was set, the air inlets will be con-
trolled automatically when turning the ignition switch to the ON
position again. HAC-115, "
WITH INTEL-
LIGENT AIR CONDI-
TIONER SYSTEM : Inlet
Port Memory Function
(FRE)"
REC MEMORY SET If the ignition switch is turned to the OFF position while the REC
switch is set to ON (recirculation), “Perform the memory” or “Do
not perform the memory” of the REC switch ON (recirculation)
condition can be selected.
If “Perform the memory” was set, the REC switch will be ON (re-
circulation) when turning the ignition switch to the ON position
again.
If “Do not perform the memory” was set, the air inlets will be con-
trolled automatically when turning the ignition switch to the ON
position again. HAC-115, "
WITH INTEL-
LIGENT AIR CONDI-
TIONER SYSTEM : Inlet
Port Memory Function
(REC)"
Page 2791 of 5121
![NISSAN TEANA 2008 Service Manual DIAGNOSIS SYSTEM (HVAC)
HAC-163
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
C
D
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F
G
H
J
K
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MA
B
HAC
N
O
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NOTE:
When the battery cable is disconnected from the negative terminal or when the battery NISSAN TEANA 2008 Service Manual DIAGNOSIS SYSTEM (HVAC)
HAC-163
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
MA
B
HAC
N
O
P
NOTE:
When the battery cable is disconnected from the negative terminal or when the battery](/manual-img/5/57391/w960_57391-2790.png)
DIAGNOSIS SYSTEM (HVAC)
HAC-163
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
MA
B
HAC
N
O
P
NOTE:
When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of WORK SUPPORT may be cancelled.
GAS SENSOR SENSITIVITY AD-
JUSTMENT FUNCTIONGas sensor sensitivity can be changed when smell of exhaust gas
introduced in the automatic re-circulation control differs from cus-
tomer’s sensible smell.HAC-116, "
WITH INTEL-
LIGENT AIR CONDI-
TIONER SYSTEM : Gas
Sensor Sensitivity Ad-
justment Function (With
Intelligent Air Conditioner
System)"
CLEAN SWITCH INTERLOCKING
MOVEMENT CHANGE FUNCTIONOperation of the clean switch, which activates the automatic re-cir-
culation control system, can be set to become available when the
A/C switch is OFF. In addition, when the clean switch is ON, it can
be set that the A/C switch is not turned ON in synchronization with
the clean switch.HAC-116, "
WITH INTEL-
LIGENT AIR CONDI-
TIONER SYSTEM :
Clean Switch Interlock-
ing Movement Change
Function (With Intelligent
Air Conditioner System)"
Work item Description Reference
Page 2792 of 5121
![NISSAN TEANA 2008 Service Manual HAC-164
< COMPONENT DIAGNOSIS >[WITH 7 INCH DISPLAY]
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000003884734
CAN (Controller Area Network) is a serial comm NISSAN TEANA 2008 Service Manual HAC-164
< COMPONENT DIAGNOSIS >[WITH 7 INCH DISPLAY]
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000003884734
CAN (Controller Area Network) is a serial comm](/manual-img/5/57391/w960_57391-2791.png)
HAC-164
< COMPONENT DIAGNOSIS >[WITH 7 INCH DISPLAY]
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000003884734
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with two
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to LAN-13, "
How to Use CAN Communication Signal Chart".
DTC LogicINFOID:0000000003884735
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000003884736
1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1. Turn ignition switch ON and wait for 2 or more seconds.
2. Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
Is
“CAN COMM CIRCUIT” displayed?
YES >> Perform trouble diagnosis for the CAN communication system. Refer to LAN-14, "Trouble Diagno-
sis Flow Chart".
NO >> Perform the intermittent malfunction diagnosis. Refer to GI-35, "
Intermittent Incident".
DTCItems
(CONSULT-III screen terms)Diagnostic item is detected when... Possible cause
U1000 CAN COMM CIRCUITWhen A/C auto amp. is not transmitting
or receiving CAN communication signal
for 2 or more seconds.CAN communication system