2010 INFINITI QX56 diagram

ADP-38
< COMPONENT DIAGNOSIS >
B2118 TILT SENSOR
B2118 TILT SENSOR
DescriptionINFOID:0000000005147465
• The tilt sensor is installed to the steering column assembly.
• The resistance of tilt sensor is changed according to the up/down position of steering column.
• The terminal voltage of automatic drive positioner control unit will be changed according to a change of tiltsensor resistance. Automatic drive positioner control unit calculates the tilt position from the voltage.
DTC LogicINFOID:0000000005147466
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1. STEP 1
Turn ignition switch ON.
>> GO TO 2
2. STEP 2
Check “Self diagnostic result” with CONSULT-III.
Is the DTC detected?
YES >> Perform diagnosis procedure. Refer to ADP-38, "DiagnosisProcedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000005147467
Regarding Wiring Diagram information, refer to ADP-138, "Wiring Diagram".
1. CHECK TILT SENSOR SIGNAL
1. Turn ignition switch ON.
2. Select “TILT SEN” in “Data m onitor” mode with CONSULT-III.
3. Check tilt sensor signal under the following condition.
Is the value normal?
YES >> GO TO 4
NO >> GO TO 2
2. CHECK FUNCTION
DTC No. Trouble diagnosis
name DTC detecting condition
Possible cause
B2118 TILT SENSOR The input voltage of tilt sensor is 0.1V or less or 4.9V
or more. • Harness and connectors
(Tilt sensor circuit is opened/
shorted, tilt sensor power supply
circuit is opened/shorted.)
• Tilt sensor
Monitor item Condition Value
TILT SEN Tilt position To p
2 V
Bottom 4 V
Revision: April 20092010 QX56

ADP-40
< COMPONENT DIAGNOSIS >
B2120 ADJ PEDAL SENSOR
B2120 ADJ PEDAL SENSOR
DescriptionINFOID:0000000005147468
• The pedal adjusting sensor is installed in the pedal assembly.
• The resistance of pedal adjusting sensor is changed according to the forward/backward position of pedalassembly.
• The terminal voltage of automatic drive positioner control unit will be changed according to a change of pedal adjusting sensor resistance. Automatic drive pos itioner control unit calculates the pedal assembly
position from the voltage.
DTC LogicINFOID:0000000005147469
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1. STEP 1
Turn ignition switch ON.
>> GO TO 2
2. STEP 2
Check “Self diagnostic result” with CONSULT-III.
Is the DTC is detected?
YES >> Perform diagnosis procedure. Refer to ADP-40, "DiagnosisProcedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000005147470
Regarding Wiring Diagram information, refer to ADP-138, "Wiring Diagram".
1. CHECK PEDAL ADJUSTING SENSOR SIGNAL
1. Turn ignition switch ON.
2. Select “PEDAL SEN” in “Dat a monitor” mode with CONSULT-III.
3. Check the pedal adjusting sensor signal under the following condition.
Is the value normal?
YES >> Pedal adjusting circuit is OK.
NO >> GO TO 2
2. CHECK PEDAL ADJUSTING SENSO R CIRCUIT HARNESS CONTINUITY
DTC No.Trouble diagnosis
name DTC detecting condition
Possible cause
B2120 ADJ PEDAL SENSOR The input voltage of pedal adjusting sensor is 0.5V
or less or 4.5V or higher, for 0.5 seconds or more. • Harness and connectors
(Pedal adjusting sensor circuit is
opened/shorted, pedal adjusting
sensor power supply circuit is
opened/shorted.)
• Pedal adjusting sensor
Monitor item Condition Value
PEDAL SEN Pedal position Forward
0.5V
Backward 4.5V
Revision: April 20092010 QX56

ADP-42
< COMPONENT DIAGNOSIS >
B2126 DETENT SW
B2126 DETENT SW
DescriptionINFOID:0000000005147471
• Park position switch is installed on A/T shift selector. It is turned OFF when the A/T selector lever is in P
position.
• The driver seat control unit judges that the A/T selector le ver is in P position if continuity does not exist in this
circuit.
DTC LogicINFOID:0000000005147472
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1. STEP 1
Drive the vehicle at 7 ±4km/h or more.
>> GO TO 2
2. STEP 2
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:0000000005147473
Regarding Wiring Diagram information, refer to ADP-119, "Wiring Diagram".
1. CHECK DTC
Check “Self diagnostic result” for BCM with CONSULT-lll.
Are other DTCs detected?
YES >> Check the DTC.
NO >> GO TO 2
2. CHECK DETENTION SWITCH SIGNAL
1. Turn ignition switch ON.
2. Select “DETENT SW” in “Data Monitor” mode with CONSULT-lll.
3. Check detention switch signal under the following condition.
Is the status normal?
YES >> A/T shift selector (park position switch) circuit is OK.
DTC No. Trouble diagnosis
name DTC detecting condition
Possible cause
B2126 DETENT SW A/T selector lever is in P position and the vehicle
speed of 7
±4km/h is detected. • Harness and connectors
(Park position switch circuit is
opened/shorted.)
• Park position switch
• Combination meter (CAN communication )
Monitor item ConditionStatus
DETENT SW A/T selector lever P position
OFF
Other than above ON
Revision: April 20092010 QX56

ADP-44
< COMPONENT DIAGNOSIS >
B2128 UART COMMUNICATION LINE
B2128 UART COMMUNICATION LINE
DescriptionINFOID:0000000005147474
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:0000000005147475
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, "DiagnosisProcedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000005147476
Regarding Wiring Diagram information, refer to ADP-119, "Wiring Diagram".
1. CHECK UART COMMUNICATION 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.
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
PIIA4598E
Revision: April 20092010 QX56

ADP-46
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
BCM
BCM : Diagnosis ProcedureINFOID:0000000005370325
Regarding Wiring Diagram information, refer to BCS-49, "Wiring Diagram".
1. CHECK FUSES AND FUSIBLE LINK
Check that the following fuses and fusible link are not blown.
Is the fuse blown?
YES >> Replace the blown fuse or fusible link after repairing the affected circuit.
NO >> GO TO 2
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM harness connector and ground.
Is the measurement value normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Terminal No. Signal nameFuses and fusible link No.
57 Battery power supply 22 (15A)
70 F (50A)
11 Ignition ACC or ON 4 (10A)
38 Ignition ON or START 59 (10A)
ConnectorTe r m i n a l s
Power
source Condition
Voltage (V) (Ap-
prox.)
(+) (-)
M18 11 Ground
ACC
power
supply Ignition
switch
ACC or ON Battery voltage
38 Ground Ignition
power
supply Ignition
switch ON or START Battery voltage
M20 57 Ground
Battery
power
supply Ignition
switch
OFF Battery voltage
70 Ground Battery
power
supply Ignition
switch OFF Battery voltage
LIIA2415E
Revision: April 20092010 QX56

POWER SUPPLY AND GROUND CIRCUITADP-47
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
Check continuity between BCM harness connector and ground.
Does continuity exist?
YES >> Inspection End.
NO >> Repair or replace harness.
DRIVER SEAT CONTROL UNIT
DRIVER SEAT CONTROL UNIT : Diagnosis ProcedureINFOID:0000000005147478
NOTE:
Do not disconnect the battery negative terminal and the dr iver seat control unit connector until DTC is con-
firmed with CONSULT-III.
Regarding Wiring Diagram information, refer to ADP-119, "
Wiring Diagram".
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconeect driver seat control unit.
3. Check voltage between driver s eat control unit harness connec-
tor and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Check the following. • Repair or replace harness between driver seat control unit and fuse block (J/B).
• Circuit breaker.
2. CHECK GROUND CIRCUIT
Check continuity between the driv er seat control unit harness con-
nector and ground.
Is the inspection result normal?
YES >> Driver seat control unit power supply and ground circuit are OK.
BCM
GroundContinuity
Connector Terminal
M20 67 Yes
LIIA0915E
Te r m i n a l s
Power
source ConditionVoltage (V)
(Approx.)
(+)
(–)
Driver seat
control unit connector Terminal
B202 6
Ground START
power sup- ply Ignition
switch
START Battery
voltage
B203 33
Battery
power sup-
ply Ignition
switch
OFF
40
LIIA1897E
Driver seat control unit
connector Te r m i n a l
Ground Continuity
B202 32
Ye s
B203 48
PIIA4542E
Revision: April 20092010 QX56

ADP-48
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
NO >> Repair or replace harness.
DRIVER SEAT CONTROL UNIT : Special Repair RequirementINFOID:0000000005147479
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:0000000005147480
NOTE:
Do not disconnect the battery negative terminal and the driver seat control unit connector until DTC is con-
firmed with CONSULT-III.
Regarding Wiring Diagram information, refer to ADP-138, "
Wiring Diagram".
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect automatic drive positioner control unit.
3. 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 automat ic 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 CONTROL UNIT : Special Repair Requirement
INFOID:0000000005147481
1. PERFORM ADDITIONAL SERVICE
Perform additional service when removing battery negative terminal.
Te r m i n a l s
Voltage (V)(Approx.)
(+)
(–)
Automatic drive positioner
control unit connector Te r m i n a l
M34 34
Ground Battery voltage
39
PIIA4543E
Automatic drive positioner
control unit connector Te r m i n a l
GroundContinuity
M34 40
Ye s
48
PIIA4544E
Revision: April 20092010 QX56

ADP-50
< COMPONENT DIAGNOSIS >
SLIDING SWITCH
SLIDING SWITCH
DescriptionINFOID:0000000005147482
Sliding switch is equipped to the power seat switch LH on the seat cushion trim cover. The operation signal is
input to the driver seat control uni t when the sliding switch is operated.
Component Function CheckINFOID:0000000005147483
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-50, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000005147484
Regarding Wiring Diagram information, refer to ADP-119, "Wiring Diagram".
1. CHECK SLIDING SWITCH SIGNAL
1. Turn ignition switch OFF.
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
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
Revision: April 20092010 QX56