sensor INFINITI QX56 2011 Factory Service Manual

P180F TRANSFER INTERNAL SPEED SENSORDLN-61
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
P180F TRANSFER INTE RNAL SPEED SENSOR
DTC LogicINFOID:0000000006222258
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Turn the ignition switch OFF to ON.
2. Turn the 4WD shift switch AUTO ⇒4H ⇒4LO ⇒4H ⇒AUTO.
3. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P180F” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-61, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222259
1.CHECK TRANSFER INTERNAL SPEED SENSOR SIGNAL
1. Turn the ignition switch ON.
2. Check the voltage between transfer control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 2.
2.CHECK TRANSFER INTERNAL SPEED SENSOR POWER SUPPLY
DTC Display item Malfunction detected condition Possible cause
P180F MOTOR SYSTEM  Malfunction is detected in transfer mo-
tor.
 Malfunction is detected in transfer in- ternal speed sensor. Transfer control actuator
 Transfer motor error
 Transfer internal speed sensor circuit
error
 Transfer assembly internal malfunc-
tion.
+
— Condition Voltage
Transfer control unit
Connector Terminal
E59 10 Ground
4WD mode: AUTO
A/T shift selector: N
Depress accelerator pedal several time
31 Ground NOTE:
When changing the transfer motor
rotation direction.
JPDIE0267GB
JPDIE0269GB
Revision: 2010 May2011 QX56

DLN-62
< DTC/CIRCUIT DIAGNOSIS >[TRANSFER: ATX90A]
P180F TRANSFER INTE
RNAL SPEED SENSOR
1. Turn the ignition switch OFF.
2. Disconnect transfer control actuator harness connector.
3. Turn the ignition switch ON.
4. Check the voltage between transfer contro l actuator harness connector terminals.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK TRANSFER INTERNAL SPEED SENSOR POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect transfer control unit harness connector.
3. Check the continuity between transfer control uni t harness connector and transfer control actuator har-
ness connector.
4. Check the continuity between transfer control actuator harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace error-detected parts.
4.CHECK TRANSFER INTERNAL S PEED SENSOR SIGNAL CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect transfer control unit harness connector.
3. Check the continuity between transfer control uni t harness connector and transfer control actuator har-
ness connector.
4. Check the continuity between transfer control actuator harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace error-detected parts.
+ −
Voltag e
Transfer control actuator
Connector Terminal F52 3 7 8V
Transfer control unit Transfer control actuator Continuity
Connector Terminal Connector Terminal
E59 39
F52 3
Existed
97
Transfer control actuator —Continuity
Connector Terminal
F52 3 Ground Not existed
Transfer control unit Transfer control actuator Continuity
Connector Terminal Connector Terminal
E59 10
F52 2
Existed
31 6
Transfer control actuator —Continuity
Connector Terminal
F52 2
Ground Not existed
6
Revision: 2010 May2011 QX56

P180F TRANSFER INTERNAL SPEED SENSORDLN-63
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
5.REPLACE TRANSFER CONTROL ACTUATOR
1. Replace transfer control actuator. Refer to DLN-114, "
Removal and Installation".
2. Perform confirmation procedure again. Refer to DLN-57, "
DTC Logic".
Is DTC
“P180F” detected?
YES >> GO TO 6.
NO >> INSPECTION END
6.CHECK TRANSFER INTERNAL FUNCTION
With CONSULT-III
1. Remove transfer control actuator. Refer to DLN-114, "
Removal and Installation".
2. Turn the actuator shaft. Refer to DLN-114, "
Inspection".
3. Check “ROTARY POSI SEN” of CONSULT-II I “DATA MONITOR” for “ALL MODE AWD/4WD”.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Transfer assembly is mechanical malfunction. Replace transfer assembly. Refer to DLN-121,
"Removal and Installation".
7.CHECK TERMINALS AND HARNESS CONNECTORS
Check the pin terminals for damage or loose connection with each harness connector.
Is the inspection result normal?
YES >> Replace transfer control unit. Refer to DLN-107, "Removal and Installation".
NO >> Repair or replace error-detected parts.
Monitor item Condition Status
ROTARY POSI SEN Turn the actuator shaft. Value is changing
Revision: 2010 May2011 QX56

DLN-72
< DTC/CIRCUIT DIAGNOSIS >[TRANSFER: ATX90A]
P181A TRANSFER MOTOR TEMPERATURE SENSOR
P181A TRANSFER MOTOR TEMPERATURE SENSOR
DTC LogicINFOID:0000000006222271
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Start the engine and drive at 40 km/h (25 MPH) or more for approximately 1minute.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P181A” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-72, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222272
1.CHECK TRANSFER MOTOR TEMPERATURE SENSOR POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect transfer control actuator harness connector.
3. Turn the ignition switch ON. CAUTION:
Never start the engine.
4. Check the voltage between transfer contro l actuator harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK TRANSFER MOTOR TEMPERATURE SENSOR CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect transfer control unit harness connector.
3. Check the continuity between transfer control uni t harness connector and transfer control actuator har-
ness connector.
4. Check the continuity between transfer control actuator harness connector and ground.
DTC Display item Malfunction detected condition Possible cause
P181A MOTOR TEMP SEN When vehicle speed is 40km/h or more
and transfer motor temperature is lower
than normal
Transfer control actuator
 Malfunction of transfer motor temper-
ature sensor circuit. (open)
When transfer motor temperature is
higher than normal Transfer control actuator
 Malfunction of transfer motor temper-
ature sensor circuit. (short)
+ −
Voltag e
Transfer control actuator
Connector Terminal F52 4 7 Approx. 5 V
Transfer control unit Transfer control actuator Continuity
Connector Terminal Connector Terminal
E59 28
F52 4
Existed
97
Revision: 2010 May2011 QX56

P181A TRANSFER MOTOR TEMPERATURE SENSOR
DLN-73
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
3.CHECK TRANSFER MOTOR TEMPERATURE SENSOR
Check the transfer control actuator. Refer to DLN-73, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Transfer motor temperature sensor is malfuncti oning. Replace transfer control actuator. Refer to
DLN-114, "
Exploded View".
4.CHECK TERMINALS AND HARNESS CONNECTORS
Check the pin terminals for damage or loose connection with each harness connector.
Is the inspection result normal?
YES >> Replace transfer control unit. Refer to DLN-107, "Removal and Installation".
NO >> Repair or replace error-detected parts.
Component InspectionINFOID:0000000006222273
1.CHECK TRANSFER MOTOR TEMPERATURE SENSOR
1. Turn the ignition switch OFF.
2. Disconnect transfer control actuator harness connector.
3. Check the resistance between transfer cont rol actuator harness connector terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Transfer motor temperature sensor is malfuncti oning. Replace transfer control actuator. Refer to
DLN-114, "
Exploded View".
Transfer control actuator —Continuity
Connector Terminal
F52 7 Ground Not existed
Transfer control actuator Condition Resistance
Te r m i n a l
47 20
°C (68 °F) Approx. 12.5 k Ω
80 °C (176 °F) Approx. 1.3 k Ω
Revision: 2010 May2011 QX56

P181E STEERING ANGLE SENSORDLN-77
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
P181E STEERING ANGLE SENSOR
DTC LogicINFOID:0000000006222279
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Turn the ignition switch OFF to ON.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P181E” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-77, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222280
1.PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT-III
Perform self-diagnosis for “ABS”.
Is DTC
“C1143” detected?
YES >> Proceed to diagnosis procedure. Refer to BRC-97, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK CAN COMMUNICATION LINE
Check communication line. Refer to LAN-69, "
Diagnosis Procedure".
Is inspection result normal?
YES >> Replace transfer control unit. Refer to DLN-107, "Removal and Installation".
NO >> Repair or replace error-detected parts.
DTC Display item Malfunction detected condition Possible cause
P181E ST ANGLE SEN SIG Malfunction is detected in steering angle
sensor signal through CAN communica-
tion. Harness or connector (CAN communi-
cation line)
 Steering angle sensor
- Steering angle sensor error
- Malfunction of steering angle sensor circuit error
Revision: 2010 May2011 QX56

DLN-80
< DTC/CIRCUIT DIAGNOSIS >[TRANSFER: ATX90A]
P1826 TRANSFER FLUID TEMPERATURE
P1826 TRANSFER FLUID TEMPERATURE
DTC LogicINFOID:0000000006222285
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Start the engine and drive at 40 km/h (25 MPH) or more for approximately 1minute.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P1826” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-80, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222286
1.CHECK TRANSFER FLUID TEMPER ATURE SENSOR POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect transfer fluid temperature sensor harness connector.
3. Turn the ignition switch ON. CAUTION:
Never start the engine.
4. Check the voltage between transfer fluid temperature sensor harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK TRANSFER FLUID TE MPERATURE SENSOR CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect transfer control unit harness connector.
3. Check the continuity between transfer control uni t harness connector and transfer control actuator har-
ness connector.
4. Check the continuity between transfer flui d temperature sensor harness connector and ground.
DTC Display item Malfunction detected condition Possible cause
P1826 OIL TEMP SEN When vehicle speed is 40km/h or more
and transfer fluid temperature is lower
than normal
Transfer fluid temperature
 Malfunction of transfer fluid tempera-
ture sensor circuit (open)
When transfer fluid temperature is high-
er than normal Transfer fluid temperature
 Malfunction of transfer fluid tempera-
ture sensor circuit (short)
+ −
Voltag e
Transfer fluid temperature sensor
Connector Terminal F37 2 1 Approx. 5 V
Transfer control unit Transfer fluid temperature sensor Continuity
Connector Terminal Connector Terminal
E59 7
F37 2
Existed
36 1
Revision: 2010 May2011 QX56

P1826 TRANSFER FLUID TEMPERATURE
DLN-81
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
3.CHECK TRANSFER FLUID TEMPERATURE SENSOR
Check the transfer fluid temperature sensor. Refer to DLN-81, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace transfer fluid temperature sensor. Refer to DLN-120, "
Exploded View".
4.CHECK TERMINALS AND HARNESS CONNECTORS
Check the pin terminals for damage or loose connection with each harness connector.
Is the inspection result normal?
YES >> Replace transfer control unit. Refer to DLN-107, "Removal and Installation".
NO >> Repair or replace error-detected parts.
Component InspectionINFOID:0000000006222287
1.CHECK TRANSFER FLUID TEMPERATURE SENSOR
1. Turn the ignition switch OFF.
2. Disconnect transfer fluid temper ature sensor harness connector.
3. Check the resistance between transfer control fluid temperature sensor connector terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace transfer fluid temperature sensor. Refer to DLN-120, "
Exploded View".
Transfer fluid temperature sensor
—Continuity
Connector Terminal
F37 2 Ground Not existed
Transfer fluid temperature sensor Condition Resistance
Te r m i n a l
21 20
°C (68 °F) Approx. 2.5 k Ω
80 °C (176 °F) Approx. 0.3 k Ω
Revision: 2010 May2011 QX56

DLN-82
< DTC/CIRCUIT DIAGNOSIS >[TRANSFER: ATX90A]
P1829 ACCELERATOR PEDAL POSITION SENSOR
P1829 ACCELERATOR PEDAL POSITION SENSOR
DTC LogicINFOID:0000000006222288
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Start the engine and drive at 30 km/h (19 MPH) or more.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P1829” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-82, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222289
1.PERFORM ECM SELF-DIAGNOSIS
With CONSULT-III
Perform self-diagnosis for “ENGINE”.
Is any DTCs detected?
YES >> Check the DTCs.
NO >> GO TO 2.
2.ERASE SELF-DIAGNOSTIC RESULT
With CONSULT-III
1. Erase self-diagnostic results for “ALL MODE AWD/4WD”.
2. Turn the ignition switch OFF.
3. Start the engine and drive vehicle for a while.
4. Check that malfunction indicator lamp (MIL) turns OFF.
Does malfunction indicator lamp (MIL) turn OFF?
YES >> GO TO 3.
NO >> Refer to EC-515, "
Diagnosis Procedure".
3.CHECK TERMINALS AND HARNESS CONNECTORS
Check transfer control unit pin terminals for damage or loose connection with harness connector.
Is inspection result normal?
YES >> After turning the ignition switch OFF, perform DTC confirmation procedure again. When DTC
"P1829" is detected, Replace transfer control unit. Refer to DLN-107, "
Removal and Installation".
NO >> Repair or replace error-detected parts.
DTC Display item Malfunction detected condition Possible cause
P1829 THROTTLE POSI SEN Malfunction is detected in accelerator
pedal position signal that is output from
ECM through CAN communication. Harness or connector (CAN communi-
cation line)
 Internal malfunction of ECM
Revision: 2010 May2011 QX56

P182A TRANSFER HI-LO POSITION SENSOR
DLN-83
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
P182A TRANSFER HI-LO POSITION SENSOR
DTC LogicINFOID:0000000006222290
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Start the engine. CAUTION:
Never drive the vehicle.
2. Turn the 4WD shift switch AUTO ⇒4H ⇒4LO ⇒4H ⇒AUTO.
3. Drive at 20 km/h (12MPH) or more for 1 minute or more.
4. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P182A” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-83, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222291
1.CHECK TRANSFER HI-LO POSITION SENSOR SIGNAL
1. Turn the ignition switch ON. CAUTION:
Never start the engine.
2. Check the voltage between transfer control unit harness connector and ground.
CAUTION:
After operating 4WD shift sw itch, move the vehicle back and forth to check voltage.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 2.
2.CHECK TRANSFER HI-LO POSITION SENSOR POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect transfer Hi-Lo position sensor harness connector.
3. Turn the ignition switch ON. CAUTION:
Never start the engine.
4. Check the voltage between transfer Hi-Lo position sensor harness connector terminals.
DTC Display item Malfunction detected condition Possible cause
P182A HI-LO POSITION SEN Malfunction related to transfer Hi-Lo po-
sition sensor has been detected.Internal malfunction of transfer Hi-Lo po-
sition sensor
+
−Condition Voltage
Transfer control unit
Connector Terminal
E59 6
Ground4WD mode: AUTO or 4H Approx. 0 V
4WD mode: 4L Approx. 5 V
25 4WD mode: AUTO or 4H Approx. 0 V
4WD mode: 4L Approx. 5 V
Revision: 2010 May2011 QX56