fl sensor INFINITI QX56 2008 Factory Owner's Manual

B2120 ADJ PEDAL SENSORADP-39
< COMPONENT DIAGNOSIS >
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1. Disconnect automatic drive positioner control unit and pedal adjusting sensor.
2. Check continuity between automatic drive positioner connector
M33 (A), M34 (C) terminals 8, 33, 41 and pedal adjusting sensor
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.
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.
ALJIA0327ZZ
Revision: March 2010 2008 QX56

ADP-42
< COMPONENT DIAGNOSIS >
B2128 UART COMMUNICATION LINE
B2128 UART COMMUNICATION LINE
DescriptionINFOID:0000000001735458
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:0000000001735459
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-42, "DiagnosisProcedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000001735460
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 positioner control unit harness con-
nector.
4. Check continuity between driver seat control unit harness connector and ground.
DTC No. Trouble diagnosis name DTC detecting conditionPossible 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: March 2010 2008 QX56

SLIDING SENSORADP-71
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SLIDING SENSOR
DescriptionINFOID:0000000001735507
• The sliding sensor is installed to the seat slide cushion frame.
• 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:0000000001735508
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-71, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000001735509
1. CHECK SLIDING SENSOR SIGNAL
1. Turn ignition switch ON.
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 slidingOperate (forward)
Change (increase)
Operate (backward) Change (decrease)
Release No change
Te r m i n a l s
ConditionVoltage 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: March 2010
2008 QX56

ADP-72
< COMPONENT DIAGNOSIS >
SLIDING SENSOR
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and sliding motor LH.
3. Check continuity between driver seat control unit harness con-nector and sliding motor LH harness connector.
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 SEAT OPERATION
1. Connect driver seat control unit and sliding motor LH.
2. Check seat operation (except sliding operation) with memory function.
Is the inspection result normal?
YES >> Replace sliding motor LH. (Built in seat slide cushion frame).
NO >> Replace driver seat control unit.
4. 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.
Driver seat control unit connector Te r m i n a lSliding motor
LH connector Terminal Continuity
B202 16
B204 3
Ye s
24 2
31 1
Driver seat control unit connector Te r m i n a l
GroundContinuity
B202 16
No
24
31
LIIA0706E
Revision: March 2010 2008 QX56

RECLINING SENSORADP-73
< COMPONENT DIAGNOSIS >
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RECLINING SENSOR
DescriptionINFOID:0000000001735510
• The reclining motor is installed to the seatback frame.
• 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:0000000001735511
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-73, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000001735512
1. CHECK RECLINING SENSOR SIGNAL
1. Turn ignition switch ON.
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 recliningOperate (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
SIIA0692J
Revision: March 2010
2008 QX56

ADP-74
< COMPONENT DIAGNOSIS >
RECLINING SENSOR
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and reclining motor LH.
3. Check continuity between driver seat control unit harness con-nector and reclining motor LH harness connector.
4. 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 connector.
2. Check seat operation (except reclining operation) with memory function.
Is the operation normal?
YES >> Replace reclining motor LH. (Built in seat slide cushion frame.)
NO >> Replace driver seat control unit.
4. 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.
Driver seat control unit connector Te r m i n a lReclining motor
connector Terminal Continuity
B202 9
B205 1
Ye s
31 2
Driver seat control unit connector Te r m i n a l
GroundContinuity
B202 9
No
31
LIIA0707E
Revision: March 2010 2008 QX56

LIFTING SENSOR (FRONT)ADP-75
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LIFTING SENSOR (FRONT)
DescriptionINFOID:0000000001735513
• The lifting sensor (front) is installed to the seat slide cushion frame.
• 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:0000000001735514
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-75, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000001735515
1. CHECK LIFTING SENSOR (FRONT) SIGNAL
1. Turn ignition switch ON.
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 SENSOR (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
ConditionVoltage 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: March 2010
2008 QX56

ADP-76
< COMPONENT DIAGNOSIS >
LIFTING SENSOR (FRONT)
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and lifting motor (front).
3. Check continuity between driver seat control unit harness con-nector and lifting motor (front) harness connector.
4. 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) connector.
2. Check seat operation [except lifting (front) operation] with memory function.
Is the operation normal?
YES >> Replace lifting motor (front). (Built in seat slide cushion frame.)
NO >> Replace driver seat control unit.
4. 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.
Driver seat control unit connector Te r m i n a l
Lifting motor
(front) connector Terminal Continuity
B202 16
B206 3
Ye s
25 2
31 1
Driver seat control unit connector Te r m i n a l
Ground Continuity
B202 16
No
25
31
LIIA0708E
Revision: March 2010 2008 QX56

LIFTING SENSOR (REAR)ADP-77
< COMPONENT DIAGNOSIS >
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LIFTING SENSOR (REAR)
DescriptionINFOID:0000000001735516
• The lifting sensor (rear) is installed to the seat slide cushion frame.
• 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 calculates the lifting (rear) amount of the seat.
Component Function CheckINFOID:0000000001735517
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-77, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000001735518
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
ConditionVoltage 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: March 2010
2008 QX56

ADP-78
< COMPONENT DIAGNOSIS >
LIFTING SENSOR (REAR)
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and lifting motor (rear).
3. Check the continuity between driver seat control unit harnessconnector 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 >> GO TO 3
NO >> Repair or replace harness.
3. CHECK SEAT OPERATION
1. Connect driver seat control unit and lifting motor (rear) connector.
2. Check the seat operation [except lifti ng (rear) operation] with memory function.
Is the operation normal?
YES >> Replace lifting motor (rear). (Built in seat slide cushion frame.)
NO >> Replace driver seat control unit.
4. 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.
Driver seat control unit connector Te r m i n a lLifting motor (rear)
connector Terminal Continuity
B202 10
B207 2
Ye s
16 3
31 1
Driver seat control unit connector Terminal
Ground Continuity
B202 10
No
16
31
LIIA0709E
Revision: March 2010 2008 QX56