2008 INFINITI QX56 ignition

POWER SUPPLY AND GROUND CIRCUITADP-45
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
DRIVER SEAT CONTROL UNIT : Special Repair RequirementINFOID:0000000001735464
1.PERFORM ADDITIONAL SERVICE
Perform additional service when removing battery negative terminal.
>> Refer to Owner’s Manual.
AUTOMATIC DRIVE POSITIONER CONTROL UNIT
AUTOMATIC DRIVE POSITIONER CO NTROL UNIT : Diagnosis Procedure
INFOID:0000000001735465
NOTE:
Do not disconnect the battery negative terminal and the dr iver seat control unit connector until DTC is con-
firmed with CONSULT-III.
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Check voltage between automatic drive positioner control unit
harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace harness.
2.CHECK GROUND CIRCUIT
Check continuity between the automatic drive positioner control unit
harness connector and ground.
Is the inspection result normal?
YES >> Automatic drive positioner control unit power supply and ground circuit are OK.
NO >> Repair or replace harness.
AUTOMATIC DRIVE POSITIONER CONTRO L UNIT : Special Repair Requirement
INFOID:0000000001735466
1.PERFORM ADDITIONAL SERVICE
Perform additional service when removing battery negative terminal.
>> Refer to Owner’s Manual.
Te r m i n a l s Voltage (V)(Approx.)
(+)
(–)
Automatic drive positioner
control unit connector Te r m i n a l
M33 34
Ground Battery voltage
39
PIIA4543E
Automatic drive positioner
control unit connector Te r m i n a l
GroundContinuity
M33 40
Ye s
48
PIIA4544E
Revision: March 2010 2008 QX56

ADP-46
< COMPONENT DIAGNOSIS >
SLIDING SWITCH
SLIDING SWITCH
DescriptionINFOID:0000000001735467
Sliding switch is equipped to the power seat switch LH on the seat cushion side surface. The operation signal
is input to the driver seat control unit when the sliding switch is operated.
Component Function CheckINFOID:0000000001735468
1. CHECK FUNCTION
1. Select “SLIDE SW-FR”, “SLIDE SW-RR” in “Data monitor” mode with CONSULT-III.
2. Check sliding switch signal under the following conditions.
Is the indication normal?
YES >> INSPECTION END
NO >> Perform diagnosis procedure. Refer to ADP-46, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000001735469
1. CHECK SLIDING SWITCH SIGNAL
1. Turn ignition switch ON.
2. Check voltage between driver seat control unit harness connec- tor and ground.
Is the inspection result normal?
YES >> GO TO 5
NO >> GO TO 2
2. CHECK SLIDING SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and power seat switch LH.
3. Check continuity between driver seat control unit harness con- nector and power seat switch LH harness connector.
Monitor item ConditionStatus
SLIDE SW-FR Sliding switch (forward) Operate
ON
Release OFF
SLIDE SW-RR Sliding switch (backward) Operate
ON
Release OFF
Driver seat control
unit connector Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
B202 11
Ground Sliding
switch Operate
(backward) 0
Release Battery
voltage
26 Operate
(forward) 0
Release Battery
voltage
PIIA4577E
Driver seat control unit connector Te r m i n a lPower seat switch
LH connector Terminal Continuity
B202 11
B208 7
Ye s
26 1
LIIA1125E
Revision: March 2010 2008 QX56

SLIDING SWITCHADP-47
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
4. Check continuity between driver seat control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK DRIVER SEAT CONTROL UNIT OUTPUT
1. Connect the driver seat control unit.
2. Turn ignition switch ON.
3. Check voltage between driver s eat control unit harness connec-
tor and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Replace driver seat control unit.
4. CHECK SLIDING SWITCH
Refer to ADP-47, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5
NO >> Replace power seat switch LH.
5. CHECK INTERMITTENT INCIDENT
Refer to GI-38, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace driver seat control unit.
NO >> Repair or replace malfunctioning part.
Component InspectionINFOID:0000000001735470
1. CHECK SLIDING SWITCH
1. Turn ignition switch OFF.
2. Disconnect power seat switch LH.
3. Check continuity between power seat switch LH terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace power seat switch LH.
Driver seat control unit connector Te r m i n a l
GroundContinuity
B202 11
No
26
Driver seat control unit
connector Te r m i n a l s
Voltage (V)
(Approx.)
(+) (–)
B202 11
Ground Battery voltage
26
PIIA4577E
Te r m i n a l Condition Continuity
Power seat switch LH
3 7 Sliding switch (backward)
Operate
Yes
Release No
1 Sliding switch (forward) Operate
Yes
Release No
LIIA1126E
Revision: March 2010 2008 QX56

ADP-48
< COMPONENT DIAGNOSIS >
RECLINING SWITCH
RECLINING SWITCH
DescriptionINFOID:0000000001735471
Reclining switch is equipped to the power seat switch LH on the seat cushion side surface. The operation sig-
nal is input to the driver seat control unit when the reclining switch is operated.
Component Function CheckINFOID:0000000001735472
1.CHECK FUNCTION
1. Select “RECLN SW-FR”, “RECLN SW-RR” in “Data monitor” mode with CONSULT-III.
2. Check reclining switch signal under the following conditions.
Is the indication normal?
YES >> INSPECTION END
NO >> Perform diagnosis procedure. Refer to ADP-48, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000001735473
1. CHECK RECLINING SWITCH SIGNAL
1. Turn ignition switch ON.
2. Check voltage between driver seat control unit harness connec- tor and ground.
Is the inspection result normal?
YES >> GO TO 5
NO >> GO TO 2
2. CHECK RECLINING SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and power seat switch LH.
3. Check continuity between driver seat control unit harness con- nector and power seat switch LH harness connector.
4. Check continuity between driver seat control unit harness con- nector and ground.
Monitor item ConditionStatus
RECLN SW-FR Reclining switch (forward) Operate
ON
Release OFF
RECLN SW-RR Reclining switch (backward) Operate
ON
Release OFF
Driver seat
control unit
connector Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
B202 12
Ground Reclining
switch Operate
(forward) 0
Release Battery voltage
27 Operate
(backward) 0
Release Battery voltage
PIIA4580E
Driver seat control unit connector Te r m i n a lPower seat switch
LH connector Terminal Continuity
B202 12
B208 9
Ye s
27 10
LIIA1127E
Revision: March 2010 2008 QX56

RECLINING SWITCHADP-49
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK DRIVER SEAT CONTROL UNIT OUTPUT
1. Connect the driver seat control unit connector.
2. Turn ignition switch ON.
3. Check voltage between driver s eat control unit harness connec-
tor and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Replace driver seat control unit.
4. CHECK RECLINING SWITCH
Refer to ADP-49, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5
NO >> Replace power seat switch LH.
5. CHECK INTERMITTENT INCIDENT
Refer to GI-38, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace driver seat control unit.
NO >> Repair or replace the malfunctioning part.
Component InspectionINFOID:0000000001735474
1. CHECK RECLINING SWITCH
1. Turn ignition switch OFF.
2. Disconnect power seat switch LH.
3. Check continuity between power seat switch LH terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace power seat switch LH.
Driver seat control unit connector Te r m i n a l
GroundContinuity
B202 12
No
27
Driver seat control
unit connector Te r m i n a l s
Voltage (V)
(Approx.)
(+) (–)
B202 12
Ground Battery voltage
27
PIIA4580E
Te r m i n a l s Condition Continuity
Power seat switch LH
3 9
Reclining switch
(backward) Operate
Yes
Release No
10 Reclining switch
(forward) Operate
Yes
Release No
LIIA1128E
Revision: March 2010 2008 QX56

ADP-50
< COMPONENT DIAGNOSIS >
LIFTING SWITCH (FRONT)
LIFTING SWITCH (FRONT)
DescriptionINFOID:0000000001735475
Lifting switch (front) is equipped to the power seat switch LH on the seat cushion side surface. The operation
signal is input to the driver seat control unit when the lifting switch (front) is operated.
Component Function CheckINFOID:0000000001735476
1. CHECK FUNCTION
1. Select “LIFT FR SW-UP”, “LIFT FR SW-DN” in “DATA MONITOR” mode with CONSULT-III.
2. Check lifting switch (front) signal under the following conditions.
Is the indication normal?
YES >> INSPECTION END
NO >> Perform diagnosis procedure. Refer to ADP-50, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000001735477
1. CHECK LIFTING SWITCH SIGNAL
1. Turn ignition switch ON.
2. Check voltage between driver seat control unit harness connec- tor and ground.
Is the inspection result normal?
YES >> GO TO 5
NO >> GO TO 2
2. CHECK LIFTING SW ITCH (FRONT) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and power seat switch LH.
3. Check continuity between driver seat control unit harness con- nector and power seat switch LH harness connector.
Monitor item ConditionStatus
LIFT FR SW-UP Lifting switch front (up) Operate
ON
Release OFF
LIFT FR SW-DN Lifting switch front (down) Operate
ON
Release OFF
Driver seat
control unit
connector Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
B202 13
Ground Lifting
switch (front) Operate
(down) 0V
Release Battery
voltage
28 Operate (up) 0V
Release Battery
voltage
PIIA4583E
Driver seat control unit connector Te r m i n a lPower seat switch
LH connector Terminal Continuity
B202 13
B208 5
Ye s
28 6
LIIA1129E
Revision: March 2010 2008 QX56

LIFTING SWITCH (FRONT)ADP-51
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
4. Check continuity between driver seat control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK DRIVER SEAT CONTROL UNIT OUTPUT
1. Connect the driver seat control unit.
2. Turn ignition switch ON.
3. Check voltage between driver s eat control unit harness connec-
tor and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Replace driver seat control unit.
4. CHECK LIFTING SWITCH (FRONT)
Refer to ADP-51, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5
NO >> Replace power seat switch LH.
5. CHECK INTERMITTENT INCIDENT
Refer to GI-38, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace driver seat control unit.
NO >> Repair or replace the malfunctioning part.
Component InspectionINFOID:0000000001735478
1. CHECK LIFTING SWITCH (FRONT)
1. Turn ignition switch OFF.
2. Disconnect power seat switch LH.
3. Check continuity between power seat switch LH terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace power seat switch LH.
Driver seat control unit connector Terminal
GroundContinuity
B202 13
No
28
Driver seat control unit
connector Te r m i n a l s
Voltage (V)
(Approx.)
(+) (–)
B202 13
Ground Battery voltage
28
PIIA4583E
Te r m i n a l Condition Continuity
Power seat switch LH
3 5 Lifting switch front (down)
Operate
Yes
Release No
6 Lifting switch front (up) Operate
Yes
Release No
LIIA1130E
Revision: March 2010 2008 QX56

ADP-52
< COMPONENT DIAGNOSIS >
LIFTING SWITCH (REAR)
LIFTING SWITCH (REAR)
DescriptionINFOID:0000000001735479
Lifting switch (rear) is equipped to the power seat switch LH on the seat cushion side surface. The operation
signal is inputted to the driver seat control unit when the lifting switch (rear) is operated.
Component Function CheckINFOID:0000000001735480
1. CHECK FUNCTION
1. Select “LIFT RR SW-UP”, “LIFT RR SW-DN” in “Data monitor” mode with CONSULT-III.
2. Check lifting switch (rear) signal under the following conditions.
Is the indication normal?
YES >> INSPECTION END
NO >> Perform diagnosis procedure. Refer to ADP-52, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000001735481
1. CHECK LIFTING SWITCH (REAR) SIGNAL
1. Turn ignition switch ON.
2. Check voltage between driver seat control unit harness connec- tor and ground.
Is the inspection result normal?
YES >> GO TO 5
NO >> GO TO 2
2. CHECK LIFTING SW ITCH (REAR) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and power seat switch LH.
3. Check continuity between driver seat control unit harness con- nector and power seat switch LH harness connector.
4. Check continuity between driver seat control unit harness con- nector and ground.
Monitor item ConditionStatus
LIFT RR SW-UP Lifting switch rear (up) Operate
ON
Release OFF
LIFT RR SW-DN Lifting switch rear (down) Operate
ON
Release OFF
Driver seat
control unit
connector Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
B202 14
Ground Lifting
switch (rear) Operate (down) 0
Release Battery voltage
29 Operate (up) 0
Release Battery voltage
PIIA4586E
Driver seat control unit connector Te r m i n a lPower sear switch
LH connector Terminal Continuity
B202 14
B208 8
Ye s
29 2
LIIA1131E
Revision: March 2010 2008 QX56