relay INFINITI QX56 2011 Factory Service Manual

C1804 VHCL HEIGHT ADJ UPSCS-79
< DTC/CIRCUIT DIAGNOSIS > [AIR LEVELIZER CONTROL SYSTEM]
C
D
F
G H
I
J
K L
M A
B
SCS
N
O P
NO >> Repair or replace damaged part.
Component Inspection (A ir Compressor Relay)INFOID:0000000006256072
1.CHECK AIR COMPRESSOR RELAY
1. Remove the air compressor relay. Refer to SCS-50, "
Component Parts Location".
2. Apply 12 V direct current between air compressor relay terminals 1 and 2. CAUTION:
 Never make the terminals short.
 Connect the fuse between the term inals when applying the voltage.
3. Check continuity between air compressor relay terminals 3 and 5.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace the air compressor relay. Refer to SCS-50, "
Component Parts Location".
Component Inspection (Air Compressor)INFOID:0000000006256073
CAUTION:
Keep the inside of air compressor free of dust.
1.CHECK AIR COMPRESSOR
1. Remove the air compressor. Refer to SCS-95, "
Removal and Installation".
2. Apply 12 V direct current between air compressor terminals 1 and 2. CAUTION:
 Never make the terminals short.
 Connect the fuse between the term inals when applying the voltage.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace the air compressor. Refer to SCS-95, "
Removal and Installation".
(+) (fuse) (−)
Condition Continuity
Air compressor relay
Te r m i n a l
2 1 Apply 12 V direct current between terminals 2 and 1. Existed
— — Does not apply 12 V direct current between terminals 2 and 1. Not existed
(+) (fuse) ( −)
Condition Status
Air compressor
Te r m i n a l
1 2 Apply 12 V direct current between terminals 1 and 2. Air flows from air exhaust holes.
Revision: 2010 May2011 QX56

SCS-84
< DTC/CIRCUIT DIAGNOSIS >[AIR LEVELIZER CONTROL SYSTEM]
C1808 AIR SUS COMPRS FNCTN
C1808 AIR SUS COMPRS FNCTN
DTC LogicINFOID:0000000006256080
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previous ly conducted, always turn ignition switch OFF
andwait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Set vehicle in the unloaded vehicle status.
2. Start the engine and wait 5 minutes or more.
3. Perform “Self Diagnostic Result” in “E-SUS”.
Is
“C1808” detected ?
YES >> Go to SCS-84, "DiagnosisProcedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006256081
1.CHECK APPEARANCE
Visually check for malfunction of suspension component s, damage of air chamber of rear shock absorber,
installation malfunction, or deformation of vehicle height sensor.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repaire or replace damaged parts.
2.CHECK AIR LEAK
Apply soapy water to air tube, connecting portions between air tube and each component, and air chamber of
rear shock absorber. Check for air leakage.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repaire or replace damaged parts.
3.CHECK AIR COMPRESSOR RELAY POWER SUPPLY
1. Turn ignition switch OFF.
2. Check 30A fuse (#I).
3. Disconnect air compressor relay connector.
4. Check voltage between air compressor relay harness connector and ground.
DTC Display item Malfunction detected condition Possible cause
C1808 AIR SUS COMPRS FNCTN The cumulative operating time of the air compressor
reaches 180 seconds or more.
NOTE:
Cumulative time is cleared under the following condi-
tions:
 Ignition switch: OFF
 Exhaust conditions: satisfied [Vehicle height re-
mains 15 mm (0.59 in) or more higher than the ref-
erence height for 30 seconds.]  Harness or connector
 Vehicle height sensor
 Air compressor (exhaust sole-
noid)
 Air compressor relay
 Overloaded
 Rear shock absorber (air cham- ber)
 Rear suspension component parts
 Air tube
Revision: 2010 May2011 QX56

C1808 AIR SUS COMPRS FNCTNSCS-85
< DTC/CIRCUIT DIAGNOSIS > [AIR LEVELIZER CONTROL SYSTEM]
C
D
F
G H
I
J
K L
M A
B
SCS
N
O P
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace damaged part.
4.CHECK AIR COMPRESSOR RELAY OUTPUT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect air compressor connector.
3. Check continuity between air compressor rela y harness connector and air compressor harness connector.
4. Check continuity between air compressor relay harness connector and ground.
Are the inspection results normal?
YES >> GO TO 5.
NO >> Repair or replace damaged part.
5.CHECK AIR COMPRESSOR GROUND
Check continuity between air compressor harness connector and ground.
Are the inspection results normal?
YES >> GO TO 6.
NO >> Repair or replace damaged part.
6.CHECK AIR COMPRESSOR RELAY
Check the air compressor relay. Refer to SCS-79, "
Component Inspection (Air Compressor Relay)".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace the air compressor relay.
7.CHECK AIR COMPRESSOR
Check the air compressor. Refer to SCS-79, "
Component Inspection (Air Compressor)".
Is the inspection result normal?
YES >> GO TO 8.
NO >> Replace the air compressor. Refer to SCS-95, "
Removal and Installation".
8.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> 1. Perform “STANDARD VEHICL E HEIGHT SETTING”. Refer to SCS-67, "Work Procedure".
2. If DTC is detected, replace the air levelizer control module. Refer to SCS-94, "
Removal and
Installation".
Air compressor relay
—Voltage
Connector Terminal
E116 5 Ground Battery voltage
Air compressor relay Air compressor Continuity
Connector Terminal Connector Terminal
E116 3 C12 1 Existed
Air compressor relay —Continuity
Connector Terminal
E116 3 Ground Not existed
Air compressor —Continuity
Connector Terminal
C12 2 Ground Existed
Revision: 2010 May2011 QX56

SE-10
< SYSTEM DESCRIPTION >
COMPONENT PARTS
SECOND SEAT POWER UNLOCK SYST EM : Component Parts Location
INFOID:0000000006217360
SECOND SEAT POWER UNLOCK SYSTEM : Component DescriptionINFOID:0000000006217361
THIRD SEAT SEATBACK POWER FOLDING SYSTEM
1. Power unlock motor RH 2. Power unlock relay RH 3. Second seat power unlock switch RH
4. Second seat power unlock switch LH 5. Power unlock motor LH 6. Power unlock relay LH
A. View with seat cushion pad and seat
back pad removed. B. View with seat cushion pad and seat
back pad removed.
JMJIA4221ZZ
Item Function
Second seat unlock switch supplies power supply to power unlock relay and operates power unlock system. Power unlock relay Supplies battery power supply to motor when receiving power supply from power unlock switch.
Power unlock motor Releases lock when receiving battery power supply from power unlock relay.
Revision: 2010 May2011 QX56

COMPONENT PARTSSE-11
< SYSTEM DESCRIPTION >
C
DE
F
G H
I
K L
M A
B
SE
N
O P
THIRD SEAT SEATBACK POWER FOLDING S YSTEM : Component Parts Location
INFOID:0000000006217362
THIRD SEAT SEATBACK POWER FOLDING SYSTEM : Component Description
INFOID:0000000006217363
1. Leclining switch LH 2. Folding motor LH 3. Up relay 1 LH
4. Up relay 2 LH 5. Down relay 1 LH 6. Down relay 2 LH
7. Fold down switch RH 8. Fold down switch LH 9. Down relay 2 RH
10. Up relay 2 RH 11. Up relay 1 RH 12. Down relay 1 RH
13. Folding motor RH 14. Leclining switch RH
A. View with luggege lower board LH
removed. B. View with luggege lower board RH
removed.
JMJIA4222ZZ
Item Function
Reclining switch supplies power supply to up relay or down relay and operates reclining and folding function of third
seat.
Fall down switch supplies power supply to up relay or down relay and operates reclining and folding function of third
seat.
Folding motor Receives power supply from fold down switch and reclining switch, and operates seatback forward
and backward.
Revision: 2010 May2011 QX56

SE-12
< SYSTEM DESCRIPTION >
COMPONENT PARTS
FRONT HEATED SEAT SYSTEM
FRONT HEATED SEAT SYSTEM : Component Parts LocationINFOID:0000000006217364
FRONT HEATED SEAT SYSTEM : Component DescriptionINFOID:0000000006217365
Up relay 1/2Supplies battery power supply to motor when receiving power supply from fold down switch or re-
clining switch.
Down relay 1/2 Supplies battery power supply to motor when receiving power supply from fold down switch or re-
clining switch.
Item Function
JMJIA4223ZZ
1. Front heated seat switch (driver
side) 2. Front heated seat switch (passenger
side) 3. Seat back heater
4. Seat cushion heater
A. Front seat
Item Function
Front heated seat switch Supplies power supply to each heated seat and operates switching of HI/LO of heated
seat and ON/OFF of the system.
Seat cushion heater Built-in seat cushion, the heater operates with the power supplied by heater seat switch. Seat back heater Built-in seatback, the heater operates with the power supplied by heater seat switch.
Revision: 2010 May2011 QX56

SE-14
< SYSTEM DESCRIPTION >
COMPONENT PARTS
CLIMATE CONTROLLED SEAT SYSTEM : Component Parts Location
INFOID:0000000006217368
CLIMATE CONTROLLED SEAT SYSTEM : Component DescriptionINFOID:0000000006217369
1. Climate controlled seat switch 2. Climate controlled seat relay 3. Seat cushion thermal electric unit
4. Climate controlled seat cushion
brower motor 5. Climate controlled seat control unit 6. Climate controlled seatback brower
motor
7. Seatback thermal electric unit
A. Engine room fuse, fusible link and re- lay box B. Back side of seat cushion. C. View with seatback board removed.
JMJIA3816ZZ
Item Function
Climate controlled seat relay Supplies power to the climate controlled seat control unit in accordance with the key switch
position that is ON or START
Climate controlled seat control unit Installed in the seat cushion backside and controls the seat cushion blower motor, seatback
blower motor, seatback thermal electric unit, and seat cushion thermal electric unit in accor-
dance with the input signal.
Climate controlled seat switch Installed in the center console and transmits signals to climate controlled seat control unit in
accordance with the HEAT (heated airflow) or COOL (cooled airflow) switch operation and the
temperature switch operation
Revision: 2010 May2011 QX56

SE-16
< SYSTEM DESCRIPTION >
SYSTEM
SYSTEM
POWER SEAT SYSTEM
POWER SEAT SYSTEM : System DescriptionINFOID:0000000006217370
Power seat switch can be operated regardless of the ignition switch position, because power supply is always
supplied to power seat switch.
SLIDING OPERATION
While operating the sliding switch located in power s eat switch, sliding motor operates and makes possible the
seat front and back position adjustment.
RECLINING OPERATION
While operating the reclining switch located in power seat switch, reclining motor operates and makes possi-
ble the seat back forward and backward position adjustment.
LIFTING OPERATION
While operating the lifting switch located in power seat switch, lifting motor operates and makes possible the
seat cushion up and down position adjustment.
LUMBAR SUPPORT SYSTEM
LUMBAR SUPPORT SYSTEM : System DescriptionINFOID:0000000006217371
 Lumbar support switch can be operated regardless of t he ignition switch position, because power supply is
always supplied to lumbar support switch.
 While operating the lumbar support switch, lumbar support motor operates which allows forward and back-
ward operation of seatback support.
SECOND SEAT POWER UNLOCK SYSTEM
SECOND SEAT POWER UNLOCK SY STEM : System DescriptionINFOID:0000000006217372
 Second seat power unlock switch can be operated regardl ess of the ignition switch position, because power
supply is always supplied to second seat power unlock switch and power unlock relay.
 Power unlock motor pulls seatback control wire, s eatback folds down, seat lock unlocks, and second seat
tilts up, when second seat power unlock switch is pressed.
THIRD SEAT SEATBACK POWER FOLDING SYSTEM
THIRD SEAT SEATBACK POWER FOLDIN G SYSTEM : System Description
INFOID:0000000006217373
 Third seat fold down switch and third seat reclini ng switch can be operated regardless of the ignition switch
position, because power supply is always supplied to thir d seat fold down switch, third seat reclining switch
and relays.
 Power folding motor operates and seatback reclining and third seat folding can be performed while third seat
fold down switch and third seat reclining switch are operated.
FRONT HEATED SEAT SYSTEM
FRONT HEATED SEAT SYSTEM : System DescriptionINFOID:0000000006217374
Heated seat is a system that operates when ignition switch is in ON position.
HEATER OPERATION
 While operating the heated seat switch, seat cushion heater and seat back heater operate.
 Temperature of seat can be adjust ed by operating on heated seat switch.
SECOND HEATED SEAT SYSTEM
SECOND HEATED SEAT SYSTEM : System DescriptionINFOID:0000000006217375
Heated seat is a system that operates when ignition switch is in ON position.
HEATER OPERATION
 While operating the heated seat switch, seat cushion heater and seat back heater operate.
Revision: 2010 May2011 QX56

POWER SUPPLY AND GROUND CIRCUITSE-67
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
SE
N
O P
DTC/CIRCUIT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
CLIMATE CONTROLLED SEAT CONTROL UNIT
CLIMATE CONTROLLED SEAT CONT ROL UNIT : Diagnosis ProcedureINFOID:0000000006217389
Driver side
1.CHECK FUSE
Check that the following fuses are not fusing.
Is the fuse fusing?
YES >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
NO >> GO TO 2.
2.CHECK CLIMATE CONTROLLED SEAT CONTRO L UNIT (DRIVER SIDE) POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit (driver side) connector.
3. Turn ignition switch ON.
4. Check voltage between climate controlled seat c ontrol unit (driver side) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 3.
3.CHECK CLIMATE CONTROLLED SEAT CONTROL UNI T (DRIVER SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat relay.
3. Check continuity between climate controlled seat control unit (driver side) harness connector and climate
controlled seat relay harness connector.
4. Check continuity between climate controlled seat control unit (driver side) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace harness or connector.
Signal name Fuse No.
Battery power supply 82(15A) IGN power supply 3 (10A)
(+) (− ) Voltage (V)
(Approx.)
Climate controlled seat co
ntrol unit (driver side)
Connector Terminal B508 53 Ground Battery voltage
B509 74
Climate controlled seat control unit (dri ver side) Climate controlled seat relay
Continuity
Connector Terminal Connector Terminal
B508 53 E18 6 Existed
B509 74
Climate controlled seat co ntrol unit (driver side)
GroundContinuity
Connector Terminal
B508 53 Not existed
B509 74
Revision: 2010 May2011 QX56

SE-68
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
4.CHECK CILMATE CONTROLLED SEAT RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between climate controlled seat relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace harness or connector.
5.CHECK CLIMATE CONTROLLED SEAT RELAY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between climate cont rolled seat relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace harness.
6.CHECK CLIMATE CONTROLLED SEAT RELAY
Check climate controlled seat relay.
Refer to SE-70, "
CLIMATE CONTROLLED SEAT CONTROL UNIT : Component Inspection".
Is the inspection result normal?
YES >> GO TO 8.
NO >> Replace climate controlled seat relay.
7.CHECK CLIMATE CONTROLLED SEAT CONTRO L UNIT (DRIVER SIDE) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between climate contro l unit (driver side) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair or replace harness or connector.
8.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Passenger side
1.CHECK FUSE
Check that the following fuses are not fusing.
(+)
(− ) Voltage (V)
(Approx.)
Climate controled seat relay
Connector Terminal
E18 2
Ground Battery voltage
7
Climate controlled seat relay
GroundContinuity
Connector Terminal
E18 1 Existed
Climate controlled seat co ntrol unit (driver side)
GroundContinuity
Connector Terminal
B509 43 Existed
Revision: 2010 May2011 QX56