2008 NISSAN TEANA check engine

HAC-44
< COMPONENT DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
B257B, B257C AMBIENT SENSOR
B257B, B257C AMBIENT SENSOR
DescriptionINFOID:0000000003846328
COMPONENT DESCRIPTION
Ambient Sensor
 The ambient sensor (1) is installed behind left side of front bumper.
 It detects ambient temperature and converts it into a resistance
value which is then input into the A/C auto amp.
Ambient Sensor Circuit
AMBIENT TEMPERATURE INPUT PROCESS
The A/C auto amp. equips a processing circuit for the ambient sensor input. However, when the temperature
detected by the ambient sensor increases quickly, the processing circuit retards the A/C auto amp. function. It
only allows the A/C auto amp. to recognize an ambient temperature increase of 0.33°C (0.6°F) per 100 sec-
onds.
As an example, consider stopping for a few minutes after high speed driving. Although the actual ambient tem-
perature has not changed, the temperature detected by the ambient sensor increases. This is because the
heat from the engine compartment can radiate to the front bumper area, the location of the ambient sensor.
DTC LogicINFOID:0000000003846329
DTC DETECTION LOGIC
NOTE:
 If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to HAC-
42, "DTC Logic" or HAC-43, "DTC Logic".
 If there is an open circuit in the ambient sensor, A/C auto amp. registers extreme cold [−44°C (−47°F)] and
adjusts the temperature control warmer.
DTC CONFIRMATION PROCEDURE
1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
JPIIA0898ZZ
JPIIA0612GB
DTCItems
(CONSULT-III screen terms)Diagnostic item is detected when... Possible cause
B257B AMB TEMP SEN (SHORT)Detected temperature at ambient sensor
−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 sensor
100°C (212°F) or more

HAC-68
< COMPONENT DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
BLOWER MOTOR
BLOWER MOTOR
DescriptionINFOID:0000000003846359
COMPONENT DESCRIPTION
Brush-less Motor
The blower motor utilizes a brush-less motor with a rotating magnet.
Quietness is improved over previous motors where the brush was
the point of contact and the coil rotated.
Blower Motor Circuit
Component Function CheckINFOID:0000000003846360
1.CHECK OPERATION
1. Warm up the engine.
2. Operate the fan control dial. Check that the fan speed and indicator are switched for all fan speeds.
Does it operate normally?
YES >> INSPECTION END
NO >> Perform trouble diagnosis for the blower motor. Refer to HAC-68, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003846361
1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1. Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2. Check if any DTC is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to HAC-
42, "DTC Logic" or HAC-43, "DTC Logic".
Is any DTC displayed?
YES >> Perform the diagnosis that is applicable to the sensor and actuator. Refer to HAC-85, "DTC
Index".
NO >> GO TO 2.
2.CHECK WITH ACTIVE TEST OF CONSULT-III
1. Using CONSULT-III, perform “HVAC TEST” “ACTIVE TEST” of HVAC to check each output device. Refer
to HAC-38, "
CONSULT-III Function".
NOTE:
Perform the ACTIVE TEST after starting the engine because the compressor is operated.
ZHA152H
JSIIA0999ZZ

BLOWER MOTOR
HAC-69
< COMPONENT DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
MA
B
HAC
N
O
P
2. Check that the blower motor control signal changes according to each indicator signal.
NOTE:
 Perform the inspection of each output device after starting the engine because the compressor is oper-
ated.
 When choosing to “MODE 7”, error message is displayed but it is not malfunction.
Does it operate normally?
YES >> INSPECTION END
NO >> GO TO 3.
3.CHECK POWER SUPPLY FOR BLOWER MOTOR
1. Disconnect blower motor connector.
2. Turn ignition switch ON.
3. Check voltage between blower motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 7.
4.CHECK BLOWER MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between blower motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair harness or connector.
5.CHECK BLOWER MOTOR CIRCUIT CONTINUITY
1. Disconnect A/C auto amp. connector.
2. Check continuity between blower motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
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 -
(+) (−)
Vo l ta g e Blower motor
—
Connector Terminal
M98 1 Ground Battery voltage
Blower motor
—Continuity
Connector Terminal
M98 3 Ground Existed
Blower motor A/C auto amp.
Continuity
Connector Terminal Connector Terminal
M98 2 M50 32 Existed

INSUFFICIENT COOLING
HAC-89
< SYMPTOM DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
MA
B
HAC
N
O
P
1. Using CONSULT-III, perform “HVAC TEST” “ACTIVE TEST” of HVAC to check each output device. Refer
to HAC-38, "
CONSULT-III Function".
NOTE:
Perform the ACTIVE TEST after starting the engine because the compressor is operated.
2. Refer to the table and check the outlet, inlet, air flow temperature, blower motor control signal, magnet
clutch operation, and air mix ratio. Visually check each operating condition, by listening for noise, touching
air outlets with a hand, etc.
NOTE:
 Perform the inspection of each output device after starting the engine because the compressor is oper-
ated.
 When choosing to “MODE 7”, error message is displayed but it is not malfunction.
Does it operate normally?
YES >> GO TO 7.
NO-1 >> Air outlet does not change. Refer to HAC-61, "
Diagnosis Procedure".
NO-2 >> Air inlet does not change. Refer to HAC-64, "
Diagnosis Procedure".
NO-3 >> Discharge air temperature does not change (driver side). Refer to HAC-57, "
Diagnosis Proce-
dure".
NO-4 >> Discharge air temperature does not change (passenger side). Refer to HAC-59, "
Diagnosis Pro-
cedure".
NO-5 >> Blower motor does not operate normally. Refer to HAC-68, "
Diagnosis Procedure".
NO-6 >> Magnet clutch does not operate. Refer to HAC-72, "
Diagnosis Procedure".
7.CHECK DRIVE BELT
Check tension of the drive belt. Refer to EM-12, "
Checking".
Is the inspection result normal?
YES >> GO TO 8.
NO >> Adjust or replace drive belt.
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 -
JPIIA0877GB

INSUFFICIENT HEATING
HAC-91
< SYMPTOM DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
MA
B
HAC
N
O
P
INSUFFICIENT HEATING
DescriptionINFOID:0000000003846388
Symptom
 Insufficient heating
 No warm air comes out. (Air flow volume is normal.)
Inspection procedureINFOID:0000000003846389
1.CHECK COOLING SYSTEM
1. Check engine coolant level and check for leakage. Refer to CO-8, "
Inspection".
2. Check radiator cap. Refer to CO-12, "
RADIATOR CAP : Inspection".
3. Check water flow sounds of engine coolant. Refer to CO-9, "
Refilling".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Refill the engine coolant and repair or replace the parts according to the inspection results.
2.CHECK OPERATION
1. Press temperature control switch (driver side) and raise temperature setting to 32°C (90°F) after warming
up the engine.
2. Check that warm air blows from the outlets.
Is the inspection result normal?
YES >> END.
NO >> GO TO 3.
3.CHECK SETTING OF TEMPERATURE SETTING TRIMMER
Using CONSULT-III, check the setting of “TEMP SET CORRECT” on “WORK SUPPORT” of HVAC. Refer to
HAC-10, "
Temperature Setting Trimmer".
1. Check that the temperature setting trimmer is set to “− direction”.
NOTE:
The control temperature can be set by the temperature setting trimmer.
2. Set temperature control switch to “0”.
Are the malfunction solved?
YES >> Perform the setting separately if necessary. END.
NO >> GO TO 4.
4.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1. Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2. Check if any DTC is displayed in the trouble diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
HAC-42, "
DTC Logic" or HAC-43, "DTC Logic".
Is any DTC displayed?
YES >> Perform the diagnosis that is applicable to the sensor and the door motor. Refer to HAC-85, "DTC
Index".
NO >> GO TO 5.
5.CHECK WITH ACTIVE TEST OF CONSULT-III
1. Using CONSULT-III, perform “HVAC TEST” in “ACTIVE TEST” of HVAC to check each output device.
Refer to HAC-38, "
CONSULT-III Function".
NOTE:
Perform the ACTIVE TEST after starting the engine because the compressor is operated.
2. Refer to the table and check the outlet, inlet, air flow temperature, blower motor control signal, magnet
clutch operation, and air mix ratio. Visually check each operating condition, by listening for noise, touching
air outlets with a hand, etc.

HAC-92
< SYMPTOM DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
INSUFFICIENT HEATING
NOTE:
 Perform the inspection of each output device after starting the engine because the compressor is oper-
ated.
 When choosing to “MODE 7”, error message is displayed but it is not malfunction.
Does it operate normally?
YES >> GO TO 6.
NO-1 >> Air outlet does not change. Refer to HAC-61, "
Diagnosis Procedure".
NO-2 >> Air inlet does not change. Refer to HAC-64, "
Diagnosis Procedure".
NO-3 >> Discharge air temperature does not change (driver side). Refer to HAC-57, "
Diagnosis Proce-
dure".
NO-4 >> Discharge air temperature does not change (passenger side). Refer to HAC-59, "
Diagnosis Pro-
cedure".
NO-5 >> Blower motor does not operate normally. Refer to HAC-68, "
Diagnosis Procedure".
NO-6 >> Magnet clutch does not operate. Refer to HAC-72, "
Diagnosis Procedure".
6.CHECK AIR LEAKAGE FROM DUCT
Check duct and nozzle, etc, of the A/C system for air leakage.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace parts according to the inspection results.
7.CHECK HEATER HOSE INSTALLATION CONDITION
Check the heater hose installation condition visually (for twists, crushes, etc.).
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair or replace parts according to the inspection results.
8.CHECK TEMPERATURE OF HEATER HOSE
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 COLDFULL
COLDFULL 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 -
JPIIA0877GB

INSUFFICIENT HEATING
HAC-93
< SYMPTOM DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
MA
B
HAC
N
O
P
1. Check the temperature of inlet hose and outlet hose of heater core.
2. Check that the inlet side of heater core is hot and the outlet side is slightly lower than/almost equal to the
inlet side.
CAUTION:
Always perform the temperature inspection in a short period of time because the engine coolant
temperature is very hot.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace the heater core after performing the procedures after the cooling system inspection. GO
TO 1.
9.REPLACE HEATER CORE
Replace the heater core. Refer to heater core. Refer to VTL-43, "
Exploded View".
Are the malfunction solved?
YES >> END.
NO >> Perform the procedures again after the cooling system inspection. GO TO 1.

HAC-104
< PRECAUTION >[WITHOUT 7 INCH DISPLAY]
COMPRESSOR
COMPRESSOR
General PrecautionsINFOID:0000000003846403
CAUTION:
 Plug all openings to prevent moisture and foreign matter from entering.
 Store it in the same way at it is when mounted on the car when the compressor is removed.
 Follow “Maintenance of Lubricant Quantity in Compressor” exactly when replacing or repairing the
compressor. Refer to HA-28, "
Maintenance of Lubricant Quantity".
 Keep friction surfaces between clutch and pulley clean. Wipe it off by using a clean waste cloth
moistened with thinner if the surface is contaminated with lubricant.
 Turn the compressor shaft by hand more than five turns in both directions after compressor service
operation. This equally distributes lubricant inside the compressor. Let the engine idle and operate
the compressor for one hour after the compressor is installed.
 Apply voltage to the new compressor and check for normal operation after replacing the compressor
magnet clutch.