NISSAN TEANA 2008 Service Manual

VENTILATION SEAT CONTROL UNITSE-67
< ECU DIAGNOSIS > [WITH VENTILATION SEAT]
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REAR SEAT : Fail-safeINFOID:0000000003940345
 The ventilation seat control unit is equipped with the fail-safe function.
 When a malfunction occurs in the system as per the follo wing, the ventilation seat control unit stops all out-
puts. The system enters in the system turns OFF position.
JCJWA0647GB

SE-68
< ECU DIAGNOSIS >[WITH VENTILATION SEAT]
VENTILATION SEAT CONTROL UNIT
*: System voltage is the voltage between ventilation seat control unit power source and the ground.
NOTE:
When the system enters in the fail-safe mode again after performing resetting procedure, perform diagnosis. Malfunction Malfunctioning condition Reset procedure
Ventilation motor system open circuitIn ventilation seat mode, ventilation motor
system open circuit is detected for 10 seconds
or moreTurn OFF key switch and turn ON key
switch again. System is reset
Ventilation motor system short circuitIn ventilation seat mode, heater unit system
short circuit is detected for 0.2 seconds or
moreTurn OFF key switch and turn ON key
switch again. System is reset
Heater unit system open circuitIn heated seat LO mode, heater unit system
open circuit is detected for 0.1 seconds or
moreTurn OFF key switch and turn ON key
switch again. System is reset
Heater unit system short circuitIn heated seat LO mode, heater unit system
short circuit is detected for 0.1 seconds or
moreTurn OFF key switch and turn ON key
switch again. System is reset
System voltage out of rangeSystem voltage* of ventilation seat control unit
is out of operation range (8.5 V - 16.5 V) When system voltage* returns within nor-
mal range after more than 0.5 seconds,
system recovers
 When recovering, system returns to the
same status as previous

VENTILATION SEAT AND HEATED SEAT DO NOT OPERATE
SE-69
< SYMPTOM DIAGNOSIS >[WITH VENTILATION SEAT]
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SYMPTOM DIAGNOSIS
VENTILATION SEAT AND HEATED SEAT DO NOT OPERATE
Diagnosis ProcedureINFOID:0000000003850483
1.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check power supply and ground circuit.
Refer to SE-12, "
VENTILATION SEAT CONTROL UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-35, "Intermittent Incident".
NO >> GO TO 1.

SE-70
< SYMPTOM DIAGNOSIS >[WITH VENTILATION SEAT]
VENTILATION SEAT DOES NOT OPERATE
VENTILATION SEAT DOES NOT OPERATE
FRONT SEAT
FRONT SEAT : Diagnosis ProcedureINFOID:0000000003850486
1.CHECK FRONT VENTILATION SEAT SWITCH
Check front ventilation seat switch.
Refer to SE-18, "
FRONT SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CHECK FRONT VENTILATION MOTOR
Check front ventilation motor.
Refer to SE-23, "
FRONT SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace the malfunctioning parts.
3.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-35, "Intermittent Incident".
NO >> GO TO 1.
REAR SEAT
REAR SEAT : Diagnosis ProcedureINFOID:0000000003851182
1.CHECK REAR VENTILATION SEAT SWITCH
Check rear ventilation seat switch.
Refer to SE-20, "
REAR SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CHECK REAR VENTILATION MOTOR
Check rear ventilation motor.
Refer to SE-25, "
REAR SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace the malfunctioning parts.
3.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-35, "Intermittent Incident".
NO >> GO TO 1.

HI MODE AND LO MODE OF HEATED SEAT DO NOT OPERATE
SE-71
< SYMPTOM DIAGNOSIS >[WITH VENTILATION SEAT]
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HI MODE AND LO MODE OF HEATED SEAT DO NOT OPERATE
FRONT SEAT
FRONT SEAT : DescriptionINFOID:0000000003900696
NOTE:
 When short or open circuit occurs in heater unit circuit, the system enters fail-safe mode. Refer to SE-59,
"FRONT SEAT : Fail-safe".
FRONT SEAT : Diagnosis ProcedureINFOID:0000000003850497
1.CHECK FRONT HEATED SEAT SWITCH
Check front heated seat switch.
Refer to SE-13, "
FRONT SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CHECK FRONT SEATBACK HEATER
Check front seatback heater.
Refer to SE-33, "
FRONT SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace the malfunctioning parts.
3.CHECK FRONT SEAT CUSHION HEATER
Check front seat cushion heater.
Refer to SE-31, "
FRONT SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace the malfunctioning parts.
4.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-35, "Intermittent Incident".
NO >> GO TO 1.
REAR SEAT
REAR SEAT : DescriptionINFOID:0000000003900697
NOTE:
 When short or open circuit occurs in heater unit circuit, the system enters fail-safe mode. Refer to SE-67,
"REAR SEAT : Fail-safe".
REAR SEAT : Diagnosis ProcedureINFOID:0000000003853477
1.CHECK REAR HEATED SEAT SWITCH
Check rear heated seat switch.
Refer to SE-15, "
REAR SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CHECK REAR SEATBACK HEATER
Check rear seatback heater.
Refer to SE-34, "
REAR SEAT : ComponentFunctionCheck".

SE-72
< SYMPTOM DIAGNOSIS >[WITH VENTILATION SEAT]
HI MODE AND LO MODE OF HEATED SEAT DO NOT OPERATE
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace the malfunctioning parts.
3.CHECK REAR SEAT CUSHION HEATER
Check rear seat cushion heater.
Refer to SE-32, "
REAR SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace the malfunctioning parts.
4.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-35, "Intermittent Incident".
NO >> GO TO 1.

HI MODE OF HEATED SEAT DOES NOT OPERATE
SE-73
< SYMPTOM DIAGNOSIS >[WITH VENTILATION SEAT]
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HI MODE OF HEATED SEAT DOES NOT OPERATE
FRONT SEAT
FRONT SEAT : Diagnosis ProcedureINFOID:0000000003850501
1.CHECK FRONT HEATED SEAT SWITCH
Check front heated seat switch.
Refer to SE-13, "
FRONT SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CHECK FRONT HEATED SEAT HI MODE GROUND CIRCUIT
Check front heated seat HI mode ground circuit.
Refer to SE-29, "
FRONT SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace the malfunctioning parts.
3.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-35, "Intermittent Incident".
NO >> GO TO 1.
REAR SEAT
REAR SEAT : Diagnosis ProcedureINFOID:0000000003853478
1.CHECK REAR HEATED SEAT SWITCH
Check rear heated seat switch.
Refer to SE-15, "
REAR SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CHECK REAR HEATED SEAT HI MODE GROUND CIRCUIT
Check rear heated seat HI mode ground circuit.
Refer to SE-30, "
REAR SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace the malfunctioning parts.
3.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-35, "Intermittent Incident".
NO >> GO TO 1.

SE-74
< SYMPTOM DIAGNOSIS >[WITH VENTILATION SEAT]
LO MODE OF HEATED SEAT DOES NOT OPERATE
LO MODE OF HEATED SEAT DOES NOT OPERATE
FRONT SEAT
FRONT SEAT : DescriptionINFOID:0000000003901738
NOTE:
 When short or open circuit occurs in heater unit circuit, the system enters fail-safe mode. Refer to SE-59,
"FRONT SEAT : Fail-safe".
FRONT SEAT : Diagnosis ProcedureINFOID:0000000003850499
1.CHECK FRONT HEATED SEAT SWITCH
Check front heated seat switch.
Refer to SE-13, "
FRONT SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CHECK FRONT SEATBACK HEATER
Check front seatback heater.
Refer to SE-33, "
FRONT SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace the malfunctioning parts.
3.CHECK FRONT SEAT CUSHION HEATER
Check front seat cushion heater.
Refer to SE-31, "
FRONT SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace the malfunctioning parts.
4.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-35, "Intermittent Incident".
NO >> GO TO 1.
REAR SEAT
REAR SEAT : DescriptionINFOID:0000000003901739
NOTE:
 When short or open circuit occurs in heater unit circuit, the system enters fail-safe mode. Refer to SE-67,
"REAR SEAT : Fail-safe".
REAR SEAT : Diagnosis ProcedureINFOID:0000000003853479
1.CHECK REAR HEATED SEAT SWITCH
Check rear heated seat switch.
Refer to SE-15, "
REAR SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CHECK REAR SEATBACK HEATER
Check rear seatback heater.
Refer to SE-34, "
REAR SEAT : ComponentFunctionCheck".

LO MODE OF HEATED SEAT DOES NOT OPERATE
SE-75
< SYMPTOM DIAGNOSIS >[WITH VENTILATION SEAT]
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Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace the malfunctioning parts.
3.CHECK REAR SEAT CUSHION HEATER
Check rear seat cushion heater.
Refer to SE-32, "
REAR SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace the malfunctioning parts.
4.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-35, "Intermittent Incident".
NO >> GO TO 1.

SE-76
< SYMPTOM DIAGNOSIS >[WITH VENTILATION SEAT]
ONLY SEATBACK HEATER IS OPERATED IN HI MODE OF HEATED SEAT
ONLY SEATBACK HEATER IS OPERATED IN HI MODE OF HEATED SEAT
FRONT SEAT
FRONT SEAT : DescriptionINFOID:0000000003900698
NOTE:
 The phenomenon appears when a malfunction occurs while HI mode is being activated.
 When mode changes to LO mode, the system enters fail-safe mode. Refer to SE-59, "
FRONT SEAT : Fail-
safe".
FRONT SEAT : Diagnosis ProcedureINFOID:0000000003850488
1.CHECK FRONT SEAT CUSHION HEATER
Check front seat cushion heater.
Refer to SE-31, "
FRONT SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-35, "Intermittent Incident".
NO >> GO TO 1.
REAR SEAT
REAR SEAT : DescriptionINFOID:0000000003900699
NOTE:
 The phenomenon appears when a malfunction occurs while HI mode is being activated.
 When mode changes to LO mode, the system enters fail-safe mode. Refer to SE-67, "
REAR SEAT : Fail-
safe".
REAR SEAT : Diagnosis ProcedureINFOID:0000000003853480
1.CHECK REAR SEAT CUSHION HEATER
Check rear seat cushion heater.
Refer to SE-32, "
REAR SEAT : ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-35, "Intermittent Incident".
NO >> GO TO 1.