INFINITI QX56 2011 Factory Service Manual

ADP-92
< DTC/CIRCUIT DIAGNOSIS >
RECLINING SENSOR
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness or connector.
3.CHECK RECLINING SENSOR POWER SUPPLY
1. Connect driver seat control unit connector.
2. Turn ignition switch ON.
3. Check voltage between reclining motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK RECLINING SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit connector.
3. Check continuity between driver seat control unit harness connector and reclining motor harness connec-
tor.
4. Check continuity between driver seat control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace driver seat control unit.
NO >> Repair or replace harness or connector.
5.CHECK RECLINING SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between reclining motor harness connector and ground.
Is the inspection result normal?
YES >> Replace reclining motor.
NO >> Repair or replace harness or connector.
Driver seat control unit
GroundContinuity
Connector Terminal
B452 4 Not existed
(+) (-)Voltage (V)
(Approx.)
Reclining motor
Connector Terminals B454 12 Ground 12
Driver seat control unit Reclining motor Continuity
Connector Terminal Connector Terminal
B452 12 B454 12 Existed
Driver seat control unit GroundContinuity
Connector Terminal
B452 12 Not existed
Reclining motor GroundContinuity
Connector Terminal
B454 43 Existed
Revision: 2010 May2011 QX56

LIFTING SENSOR (FRONT)ADP-93
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
LIFTING SENSOR (FRONT)
Component Function CheckINFOID:0000000006248390
1.CHECK FUNCTION
1. Select “LIFT FR PULSE” in “Data monitor” mode with CONSULT-III.
2. Check the lifting sensor (front) signal under the following conditions.
*1 : The value at the seat position attained when the battery is connected is considered to be 32768.
Is the indication normal?
YES >> INSPECTION END
NO >> Perform diagnosis procedure. Refer to ADP-93, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000006248391
1.CHECK LIFTING SENSOR (FRONT) SIGNAL
1. Turn ignition switch ON.
2. Read the voltage signal driver seat contro l unit harness connector and ground with an oscilloscope.
Is the inspection result normal?
YES >> Replace driver seat control unit.
NO >> GO TO 2.
2.CHECK LIFTING SENSOR (FRONT) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and lifting motor (front) connector.
3. Check continuity between driver seat control uni t harness connector and lifting motor (front) harness con-
nector.
4. Check continuity between driver s eat control unit harness connector and ground.
Monitor item Condition Value
LIFT FR PULSE Seat lifting (front) Operate (up)
Change (increase)
*1
Operate (down)Change (decrease)*1
Release
No change*1
(+)
(-) Condition Voltage (V)
(Approx.)
Driver seat control unit
Connector Terminals
B452 19 Ground Seat Lifting
(front)Operate
Other than the
above
0 or 5
JMJIA0119ZZ
Driver seat control unit Lifting motor (front)
Continuity
Connector Terminal Connector Terminal
B452 19 B455 19 Existed
Revision: 2010 May2011 QX56

ADP-94
< DTC/CIRCUIT DIAGNOSIS >
LIFTING SENSOR (FRONT)
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness or connector.
3.CHECK LIFTING SENSOR (FRONT) POWER SUPPLY
1. Connect driver seat control unit connector.
2. Turn ignition switch ON.
3. Check voltage between lifting motor (front) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK LIFTING SENSOR (FRONT) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit connector.
3. Check continuity between driver seat control uni t harness connector and lifting motor (front) harness con-
nector.
4. Check continuity between driver seat control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace driver seat control unit.
NO >> Repair or replace harness or connector.
5.CHECK LIFTING SENSOR (FRONT) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between lifting motor (front) harness connector and ground.
Is the inspection result normal?
YES >> Replace lifting motor (front).
NO >> Repair or replace harness or connector.
Driver seat control unit
GroundContinuity
Connector Terminal
B452 19 Not existed
(+) (-)Voltage (V)
(Approx.)
Lifting motor (front)
Connector Terminals B455 12 Ground 12
Driver seat control un it Lifting motor (front)
Continuity
Connector Terminal Connector Terminal
B452 12 B455 12 Existed
Driver seat control unit GroundContinuity
Connector Terminal
B452 12 Not existed
Lifting motor (front) GroundContinuity
Connector Terminal
B455 43 Existed
Revision: 2010 May2011 QX56

LIFTING SENSOR (REAR)ADP-95
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
LIFTING SENSOR (REAR)
Component Function CheckINFOID:0000000006248392
1.CHECK FUNCTION
1. Select “LIFT RR PULSE” in “Data monitor” mode with CONSULT-III.
2. Check lifting sensor (rear) signal under the following conditions.
*1 : The value at the seat position attained when the battery is connected is considered to be 32768.
Is the indication normal?
YES >> INSPECTION END
NO >> Perform diagnosis procedure. Refer to ADP-95, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000006248393
1.CHECK LIFTING SENSOR (REAR) SIGNAL
1. Turn ignition switch ON.
2. Read voltage signal between driver seat contro l unit harness connector and ground with oscilloscope.
Is the inspection result normal?
YES >> Replace driver seat control unit.
NO >> GO TO 2.
2.CHECK LIFTING SENSOR (REAR) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and lifting motor (rear) connector.
3. Check the continuity between driver seat cont rol unit harness connector and lifting motor (rear) harness
connector.
4. Check the continuity between driver seat control unit harness connector and ground.
Monitor item Condition Value
LIFT RR PULSE Seat lifting (rear) Operate (up)
Change (increase)
*1
Operate (down)Change (decrease)*1
Release
No change*1
(+)
(-) Condition Voltage (V)
(Approx.)
Driver seat control unit
Connector Terminals
B452 20 Ground Seat Lifting
(rear)Operate
Other than the
above
0 or 5
JMJIA0119ZZ
Driver seat control unit Lifting motor (rear)
Continuity
Connector Terminal Connector Terminal
B452 20 B456 20 Existed
Revision: 2010 May2011 QX56

ADP-96
< DTC/CIRCUIT DIAGNOSIS >
LIFTING SENSOR (REAR)
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness or connector.
3.CHECK LIFTING SENSOR (REAR) POWER SUPPLY
1. Connect driver seat control unit connector.
2. Turn ignition switch ON.
3. Check the voltage between lifting motor (rear) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK LIFTING SENSOR (REAR) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit connector.
3. Check the continuity between driver seat contro l unit harness connector and lifting motor (rear) harness
connector.
4. Check the continuity between driver seat control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace driver seat control unit.
NO >> Repair or replace harness or connector.
5.CHECK LIFTING SENSOR (REAR) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check the continuity between lifting motor (rear) harness connector and ground.
Is the inspection result normal?
YES >> Replace lifting motor (rear).
NO >> Repair or replace harness or connector.
Driver seat control unit
GroundContinuity
Connector Terminal
B452 20 Not existed
(+) (-)Voltage (V)
(Approx.)
Lifting motor (rear)
Connector Terminals B456 12 Ground 12
Driver seat control unit Lifting motor (rear) Continuity
Connector Terminal Connector Terminal
B452 12 B456 12 Existed
Driver seat control unit GroundContinuity
Connector Terminal
B452 12 Not existed
Lifting motor (rear) GroundContinuity
Connector Terminal
B456 43 Existed
Revision: 2010 May2011 QX56

TILT SENSORADP-97
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
TILT SENSOR
Component Function CheckINFOID:0000000006248394
1.CHECK FUNCTION
1. Select “TILT PULSE” in “Data monitor” mode with CONSULT-III.
2. Check tilt sensor signal under the following conditions.
*1 : The value at the seat position attained when the battery is connected is considered to be 32768.
Is the indication normal?
YES >> INSPECTION END
NO >> Perform diagnosis procedure. Refer to ADP-97, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000006248395
1.CHECK TILT SENSOR SIGNAL
1. Turn ignition switch ON.
2. Check voltage signal between driver seat c ontrol unit connector and ground with oscilloscope.
Is the inspection result normal?
YES >> Replace driver seat control unit.
NO >> GO TO 2.
2.CHECK TILT SENSOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit connector and tilt motor connector.
3. Check continuity between driver seat control unit harness connector and tilt motor harness connector.
4. Check continuity between driver s eat control unit harness connector and ground.
Monitor item Condition Value
TILT PULSE Steering column Operate (up)
Change (increase)
*1
Operate (down)Change (decrease)*1
Release
No change*1
(+)
(-) Condition Voltage (V)
(Approx.)
Driver seat control unit
Connector Terminals
B452 21 Ground Ste eri ng co l-
umnOperate
Other than the
above
0 or 5
JMJIA0119ZZ
Driver seat control unit Tilt motor
Continuity
Connector Terminal Connector Terminal
B452 21 M116 5 Existed
Driver seat control unit GroundContinuity
Connector Terminal
B452 21 Not existed
Revision: 2010 May2011 QX56

ADP-98
< DTC/CIRCUIT DIAGNOSIS >
TILT SENSOR
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness or connector.
3.CHECK TILT SENSOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between tilt motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK TILT SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect automatic drive positioner control unit connector.
3. Check continuity between automatic drive positioner control unit harness connector and tilt motor harness
connector.
4. Check continuity between automatic drive positioner control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace automatic drive positioner control unit.
NO >> Repair or replace harness or connector.
5.CHECK TILT SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect automatic drive positioner control unit connector.
3. Check continuity between automatic drive positioner control unit harness connector and tilt motor harness
connector.
4. Check continuity between automatic drive positioner control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace tilt motor.
NO >> Repair or replace harness or connector.
(+) (-)Voltage (V)
(Approx.)
Tilt motor
Connector Terminals M116 4 Ground 12
Automatic drive positioner control unit Tilt motor Continuity
Connector Terminal Connector Terminal
M104 27 M116 4 Existed
Automatic drive positioner control unit GroundContinuity
Connector Terminal
M104 27 Not existed
Automatic drive positioner control unit Tilt motor Continuity
Connector Terminal Connector Terminal
M75 20 M116 6 Existed
Automatic drive positioner control unit GroundContinuity
Connector Terminal
M75 20 Not existed
Revision: 2010 May2011 QX56

TELESCOPIC SENSORADP-99
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
TELESCOPIC SENSOR
Component Function CheckINFOID:0000000006248396
1.CHECK FUNCTION
1. Select “TELESCO PULSE” in “Dat a monitor” mode with CONSULT-III.
2. Check telescopic sensor signal under the following conditions.
*1 : The value at the seat position attained when the battery is connected is considered to be 32768.
Is the indication normal?
YES >> INSPECTION END
NO >> Perform diagnosis procedure. Refer to ADP-99, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000006248397
1.CHECK TELESCOPIC SENSOR SIGNAL
1. Turn ignition switch ON.
2. Check voltage signal between driver seat c ontrol unit connector and ground with oscilloscope.
Is the inspection result normal?
YES >> Replace driver seat control unit.
NO >> GO TO 2.
2.CHECK TELESCOPIC SENSOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit connector and telescopic motor connector.
3. Check continuity between driver seat control unit harness connector and telescopic motor harness con-
nector.
4. Check continuity between driver s eat control unit harness connector and ground.
Monitor item Condition Value
TELESCO PULSE Steering column Operate (forward)
Change (increase)
*1
Operate (backward)Change (decrease)*1
Release
No change*1
(+)
(-) Condition Voltage (V)
(Approx.)
Driver seat control unit
Connector Terminals
B452 5 Ground Ste eri ng co l-
umnOperate
Other than the
above
0 or 5
JMJIA0119ZZ
Driver seat control unit Telescopic motor
Continuity
Connector Terminal Connector Terminal
B4525M1175Existed
Revision: 2010 May2011 QX56

ADP-100
< DTC/CIRCUIT DIAGNOSIS >
TELESCOPIC SENSOR
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness or connector.
3.CHECK TELESCOPIC SENSOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between telescopic motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK TELESCOPIC SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect automatic drive positioner control unit connector.
3. Check continuity between automatic drive positi oner control unit harness connector and telescopic motor
harness connector.
4. Check continuity between automatic drive positioner control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace automatic drive positioner control unit.
NO >> Repair or replace harness or connector.
5.CHECK TELESCOPIC SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect automatic drive positioner control unit connector.
3. Check continuity between automatic drive positi oner control unit harness connector and telescopic motor
harness connector.
4. Check continuity between automatic drive positioner control unit harness connector and ground.
Is the inspection result normal?
Driver seat control unit GroundContinuity
Connector Terminal
B452 5 Not existed
(+) (-)Voltage (V)
(Approx.)
Telescopic motor
Connector Terminals M117 4 Ground 12
Automatic drive positioner control unit Telescopic motor Continuity
Connector Terminal Connector Terminal
M104 27 M117 4 Existed
Automatic drive positioner control unit GroundContinuity
Connector Terminal
M104 27 Not existed
Automatic drive positioner control unit Telescopic motor Continuity
Connector Terminal Connector Terminal
M75 20 M117 6 Existed
Automatic drive positioner control unit GroundContinuity
Connector Terminal
M75 20 Not existed
Revision: 2010 May2011 QX56

TELESCOPIC SENSORADP-101
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
YES >> Replace telescopic motor.
NO >> Repair or replace harness or connector.
Revision: 2010 May2011 QX56