sensor INFINITI QX56 2009 Factory Owner's Manual

B2120 ADJ PEDAL SENSORADP-41
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
1. Disconnect automatic drive positioner control unit and pedal adjusting motor assembly.
2. Check continuity between autom atic drive positioner connector
M33 (A), M34 (C) terminals 8, 33, 41 and pedal adjusting motor
assembly connector E110 (B) terminals 3, 4, 5.
3. Check continuity between automat ic drive positioner control unit
connector M33 (A), M34 (C) terminals 8, 33, 41 and ground.
Is the inspection result normal?
YES >> Replace pedal adjusting motor assembly. Refer to ADP-
169, "Removal and Installation".
NO >> Repair or replace harness. 8 - 4 : Continuity should exist.
33 - 3 : Continuity should exist.
41 - 5 : Continuity should exist.
8 - Ground : Continuity should not exist.
33 - Ground : Continuity should not exist.
41 - Ground : Continuity should not exist.
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Revision: December 20092009 QX56

ADP-44
< COMPONENT DIAGNOSIS >
B2128 UART COMMUNICATION LINE
B2128 UART COMMUNICATION LINE
DescriptionINFOID:0000000003775544
Driver seat control unit performs UART communication with the automatic drive positioner control unit using 2
communication lines, TX and RX line. Driver seat cont rol unit receives the operation signals of pedal adjusting
switch, door mirror remote control switch, set switch and memory switch and the position signals of adjustable
pedal sensor and door mirror sensor from the automatic drive positioner control unit and transmits the opera-
tion request signal.
DTC LogicINFOID:0000000003775545
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1. STEP 1
Turn ignition switch ON.
>> GO TO 2
2. STEP 2
Operate pedal adjusting switch for more than 2 seconds.
>> GO TO 3
3. PROCEDURE 3
Check “Self diagnostic result” with CONSULT-III.
Is the DTC detected?
YES >> Perform diagnosis procedure. Refer to ADP-44, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000003775546
1. CHECK UART COMMUNICA TION LINE CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect driver seat contro l unit and automatic drive posi-
tioner control unit.
3. Check continuity between driver seat control unit harness con- nector and automatic drive positi oner control unit harness con-
nector.
4. Check continuity between driver seat control unit harness connector and ground.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause B2128 UART COMM The communication between driver seat control unit
and automatic drive positioner control unit is interrupt-
ed for a period of time.  UART communication line
(UART communication line is
open or shorted)
 Driver seat control unit
 Automatic drive positioner control unit
Driver seat control unit connector Te r m i n a lAutomatic drive positioner
control unit connector Terminal Continuity
B202 1
M33 10
Ye s
17 26
PIIA4598E
Revision: December 20092009 QX56

ADP-74
< COMPONENT DIAGNOSIS >
SLIDING SENSOR
SLIDING SENSOR
DescriptionINFOID:0000000003775597
 The sliding sensor is installed to the power seat frame assembly.
 The pulse signal is input to the driver seat control unit when sliding is performed.
 The driver seat control unit counts the pulse and calculates the sliding amount of the seat.
Component Function CheckINFOID:0000000003775598
1. CHECK FUNCTION
1. Select “SLIDE PULSE” in “Data monitor” mode with CONSULT-III.
2. Check sliding sensor signal under the following conditions.
Is the indication normal?
YES >> Inspection End.
NO >> Perform diagnosis procedure. Refer to ADP-74, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000003775599
1. CHECK SLIDING SENSOR SIGNAL
1. Turn ignition switch OFF.
2. Read voltage signal between driver seat control unit harness connector and ground with osiloscope.
Is the inspection result normal?
YES >> GO TO 4
NO >> GO TO 2
2. CHECK SLIDING SENSOR CIRCUITS
Monitor item Condition Valve
SLIDE PULSE Seat sliding Operate (forward) Change (increase)
Operate (backward) Change (decrease)
Release No change
Te r m i n a l s
Condition Voltage signal
(+)
(–)
Driver’s
seat
control unit Te r m i -
nal
B202 24 Ground Seat
slidingOperate
Other
than
above
0 or 5
PIIA4556E
PIIA3277E
Revision: December 20092009 QX56

SLIDING SENSORADP-75
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
1. Disconnect driver seat control unit and sliding motor LH.
2. Check continuity between driver seat control unit harness con-
nector and sliding motor LH harness connector.
3. Check continuity between driver seat control unit harness con-
nector and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK SEAT OPERATION
1. Connect driver seat control unit and sliding motor LH.
2. Check seat operation (except slidi ng operation) with memory function.
Is the inspection result normal?
YES >> Replace sliding motor LH. (Built in power seat frame assembly). Refer to SE-68, "Disassembly
and Assembly".
NO >> Replace driver seat control unit. Refer to ADP-165, "Removal and Installation"
.
4. CHECK INTERMITTENT INCIDENT
Refer to GI-38, "Intermittent Incident"
.
Is the inspection result normal?
YES >> Replace driver seat control unit. Refer to ADP-165, "Removal and Installation".
NO >> Repair or replace the malfunctioning part.
Driver seat control
unit connector Te r m i n a l
Sliding motor
LH connector Terminal Continuity
B202 (A) 16
B204 (B) 3
Ye s
24 4
31 2
Driver seat control unit connector Te r m i n a l
GroundContinuity
B202 (A) 16
No
24
31
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ADP-76
< COMPONENT DIAGNOSIS >
RECLINING SENSOR
RECLINING SENSOR
DescriptionINFOID:0000000003775600
 The reclining motor is installed to the seatback assembly.
 The pulse signal is inputted to the driver seat control unit when the reclining is operated.
 The driver seat control unit counts the pulse and calculates the reclining amount of the seat.
Component Function CheckINFOID:0000000003775601
1. CHECK FUNCTION
1. Select “RECLN PULSE” in “Data monitor” mode with CONSULT-III.
2. Check reclining sensor signal under the following conditions.
Is the indication normal?
YES >> Inspection End.
NO >> Perform diagnosis procedure. Refer to ADP-76, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000003775602
1. CHECK RECLINING SENSOR SIGNAL
1. Turn ignition switch OFF.
2. Read voltage signal between driver seat control unit harness connector and ground with oscilloscope.
Is the inspection result normal?
YES >> GO TO 4
NO >> GO TO 2
2. CHECK RECLINING SENSOR CIRCUIT
Monitor item Condition Value
RECLN PULSE Seat reclining Operate (forward) Change (increase)
Operate (backward) Change (decrease)
Release No change
Te r m i n a l s
Condition Voltage signal
(+)
(–)
Driver
seat con-
trol unit Te r m i -
nal
B202 9 Ground Seat
reclin-
ingOperate
Other
than
above
0 or 5
PIIA4559E
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Revision: December 20092009 QX56

RECLINING SENSORADP-77
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
1. Disconnect driver seat control unit and reclining motor LH.
2. Check continuity between driver seat control unit harness con-
nector and reclining motor LH harness connector.
3. Check continuity between driver seat control unit harness con-
nector and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK SEAT OPERATION
1. Connect driver seat control unit and reclining motor LH.
2. Check seat operation (except reclin ing operation) with memory function.
Is the operation normal?
YES >> Replace reclining motor LH. (Built in seatback assembly). Refer to SE-68, "Disassembly and
Assembly".
NO >> Replace driver seat control unit. Refer to ADP-165, "Removal and Installation"
.
4. CHECK INTERMITTENT INCIDENT
Refer to GI-38, "Intermittent Incident"
.
Is the inspection result normal?
YES >> Replace driver seat control unit. Refer to ADP-165, "Removal and Installation".
NO >> Repair or replace the malfunctioning part.
Driver seat control
unit connector Te r m i n a l
Reclining motor
connector Terminal Continuity
B202 (A) 9
B205 (B) 1
Ye s
31 4
Driver seat control unit connector Te r m i n a l
GroundContinuity
B202 (A) 9
No
31
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Revision: December 20092009 QX56

ADP-78
< COMPONENT DIAGNOSIS >
LIFTING SENSOR (FRONT)
LIFTING SENSOR (FRONT)
DescriptionINFOID:0000000003775603
 The lifting sensor (front) is installed to the power seat frame assembly.
 The pulse signal is input to the driver seat control unit when the lifting (front) is operated.
 The driver seat control unit counts the pulse and ca lculates the lifting (front) amount of the seat.
Component Function CheckINFOID:0000000003775604
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.
Is the indication normal?
YES >> Inspection End.
NO >> Perform diagnosis procedure. Refer to ADP-78, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000003775605
1. CHECK LIFTING SENSOR (FRONT) SIGNAL
1. Turn ignition switch OFF.
2. Read the voltage signal between driver seat control unit harness connector and ground with an oscilloscope.
Is the inspection result normal?
YES >> GO TO 4
NO >> GO TO 2
2. CHECK LIFTING SENS OR (FRONT) CIRCUIT
Monitor item Condition Value
LIFT FR PULSE Seat lifting (front) Operate (up) Change (increase)
Operate (down) Change (decrease)
Release No change
Te r m i n a l s
Condition Voltage signal
(+)
(–)
Driver
seat con- trol unit
connector Te r m i -
nal
B202 25 Ground Seat
lifting
(front)Oper-
ate
Other
than
above
0 or 5
PIIA4561E
SIIA0691J
Revision: December 20092009 QX56

LIFTING SENSOR (FRONT)ADP-79
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
1. Disconnect driver seat control unit and lifting motor (front).
2. Check continuity between driver seat control unit harness con-
nector and lifting motor (front) harness connector.
3. Check continuity between driver seat control unit harness con-
nector and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK SEAT OPERATION
1. Connect driver seat control unit and lifting motor (front).
2. Check seat operation [except lifting (f ront) operation] with memory function.
Is the operation normal?
YES >> Replace lifting motor (front). (Built in power seat frame assembly). Refer to SE-68, "Disassembly
and Assembly".
NO >> Replace driver seat control unit. Refer to ADP-165, "Removal and Installation"
.
4. CHECK INTERMITTENT INCIDENT
Refer to GI-38, "Intermittent Incident"
.
Is the inspection result normal?
YES >> Replace driver seat control unit. Refer to ADP-165, "Removal and Installation".
NO >> Repair or replace the malfunctioning part.
Driver seat control
unit connector Te r m i n a lLifting motor
(front) connector Terminal Continuity
B202 (A) 16
B206 (B) 3
Ye s
25 4
31 2
Driver seat control unit connector Te r m i n a l
Ground Continuity
B202 (A) 16
No
25
31
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ADP-80
< COMPONENT DIAGNOSIS >
LIFTING SENSOR (REAR)
LIFTING SENSOR (REAR)
DescriptionINFOID:0000000003775606
 The lifting sensor (rear) is installed to the power seat frame assembly.
 The pulse signal is input to the driver seat control unit when the lifting (rear) is operated.
 The driver seat control unit counts the pulse and ca lculates the lifting (rear) amount of the seat.
Component Function CheckINFOID:0000000003775607
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.
Is the indication normal?
YES >> Inspection End.
NO >> Perform diagnosis procedure. Refer to ADP-80, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000003775608
1. CHECK LIFTING SENSOR (REAR) SIGNAL
1. Turn ignition switch OFF.
2. Read voltage signal between driver seat control unit harness connector and ground with oscilloscope.
Is the inspection result normal?
YES >> GO TO 4
NO >> GO TO 2
2. CHECK LIFTING SENSOR (REAR) CIRCUIT
Monitor item Condition Value
LIFT RR PULSE Seat lifting (rear) Operate (up) Change (increase)
Operate (down) Change (decrease)
Release No change
Te r m i n a l s
Condition Voltage signal
(+)
(–)
Driver
seat con- trol unit
connector Te r m i -
nal
B202 10 Ground Seat
lifting
(rear)Oper-
ate
Other
than
above
0 or 5
PIIA4563E
SIIA0693J
Revision: December 20092009 QX56

LIFTING SENSOR (REAR)ADP-81
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
1. Disconnect driver seat control unit and lifting motor (rear).
2. Check the continuity between driver seat control unit harness connector and lifting motor (rear) harness connector.
3. Check the 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 SEAT OPERATION
1. Connect driver seat control unit and lifting motor (rear).
2. Check the seat operation [except lifting (rear) operation] with memory function.
Is the operation normal?
YES >> Replace lifting motor (rear). (Built in power seat frame assembly). Refer to SE-68, "Disassembly
and Assembly".
NO >> Replace driver seat control unit. Refer to ADP-165, "Removal and Installation"
.
4. CHECK INTERMITTENT INCIDENT
Refer to GI-38, "Intermittent Incident"
.
Is the inspection result normal?
YES >> Replace driver seat control unit. Refer to ADP-165, "Removal and Installation".
NO >> Repair or replace the malfunctioning part.
Driver seat control
unit connector Te r m i n a l
Lifting motor (rear)
connector Terminal Continuity
B202 (A) 10
B207 (B) 4
Ye s
16 3
31 2
Driver seat control unit connector Te r m i n a l
Ground Continuity
B202 (A) 10
No
16
31
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Revision: December 20092009 QX56