2011 INFINITI QX56 turn signal

DLN-18
< SYSTEM DESCRIPTION >[TRANSFER: ATX90A]
SYSTEM
SYSTEM
4WD SYSTEM
4WD SYSTEM : System DescriptionINFOID:0000000006222224
 In AUTO mode, distribution of traction force is cont
rolled from 2WD status (0:100) to 4WD status (50:50)
according to signal from each sensor and switch.
 In accordance with fail-safe function, when system is malfunctioning, 4WD warning lamp on combination meter turns ON and 4WD control stops. For fail-safe function, refer to DLN-20, "
4WD SYSTEM : Fail-Safe".
 When a high load status continues for transfer assembly (transfer control actuator or transfer fluid), 4WD
control temporarily becomes 4H or 2WD status, according to protection function.
NOTE:
4WD system is not malfunctioning.
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL
It transmits/receives each signal from the followi ng transfer control unit via CAN communication line.
JPDIE0272GB
Component parts Control signal
ABS actuator and electric unit (control unit) Transmits the following signals via CAN communication line to transfer control unit.
 Vehicle spee
d signal (ABS)
 Stop lamp switch signal (brake signal)
 ABS operation signal
 VDC operation signal
 TCS operation signal
ECM Transmits the following signals via CAN communication line to transfer control unit.
 Accelerator pedal position signal
 Engine speed signal
 Engine torque signal
Revision: 2010 May2011 QX56

SYSTEMDLN-19
< SYSTEM DESCRIPTION > [TRANSFER: ATX90A]
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4WD SHIFT SWITCH AND 4WD SHIFT INDICATOR LAMP
*1: Blinking 2 times/1 second
*2: “4HI” and “4LO” blink alternately.
CONDITION FOR TURN ON THE WARNING LAMP
TCM Transmits the following signals via CAN communication line to transfer control unit.
 Shift position signal
 Gear position signal
 Output shaft revolution signal
Steering angle sensor Transmits the following signals via CAN communication line to transfer control unit.
 Steering angle sensor signal
Combination meter Receives the following signals via CAN communication line from transfer control unit.
 4WD warning lamp signal
 ATP warning lamp signal
 4WD mode indicator signal
Component parts Control signal
4WD shift switch 4WD shift indicator lamp (in Information display) 4WD shift procedure
AUTO
1. Start the engine.
2. Turn the 4WD shift switch.
NOTE:
Mode can be switched between AU-
TO⇔4H while driving straight.
4H
↓↑
4WD status: 4H ⇔4L (Blinking)
*1*2
1. Start the engine.
2. Never drive the vehicle.
3. Shift A/T shift selector to N position.
4. Press and rotate 4WD shift switch
while depressing brake pedal.
CAUTION:
4WD mode does not switch when 4WD
shift switch is operated while the vehi-
cle is running or A/T shift selector is
shifted to any position other than neu-
tral.
4L
JPDIE0230ZZJPDIE0234ZZ
JPDIE0231ZZJPDIE0235ZZ
JPDIE0231ZZ
JPDIE0233ZZ
JPDIE0236ZZ
JPDIE0233ZZJPDIE0237ZZ
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
DLN-21
< SYSTEM DESCRIPTION > [TRANSFER: ATX90A]
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DIAGNOSIS SYSTEM (TRA NSFER CONTROL UNIT)
CONSULT-III FunctionINFOID:0000000006222226
FUNCTION
CONSULT-III can display each diagnostic item using the diagnostic test modes as follows.
*: The following diagnosis information is erased by erasing.
DTC
ECU IDENTIFICATION
Transfer control unit part number can be read.
SELF DIAGNOSTIC RESULT
Refer to DLN-29, "DTC Index".
When "0" is displayed on self-diagnosis result.
 The system is presently malfunctioning.
When except "0" is displayed on self-diagnosis result. System malfunction in the past is detec ted, but the system is presently normal.
NOTE:
Each time when ignition switch is turned OFF to ON, numerical number increases in 1 →2→ 3...110 →111 .
When the operation number of times exceeds 111, the number do not increase and “111” is displayed until
self-diagnosis is erased
*.
*: For “U1000” and “U1010”, the maximum value is “39”.
DATA MONITOR
X:Applicable
Diagnostic test mode Function
ECU Identification Transfer control unit part number can be read.
Self Diagnostic Result Self-diagnostic results can be read and erased quickly.*
Data Monitor Input/Output data in the transfer control unit can be read.
Work Support This mode enables a technican to adjust some devices faster and more accurately by following the
indications on the CONSULT-III
Monitor item (Unit) SELECT MONITOR ITEM
Remarks
ECU INPUT
SIGNALS MAIN SIG-
NALS
4WD MODE [BOTNG/SWTNG/4L/4H/AUTO] X Control status of 4WD mode is displayed.
2WD SW [On/Off] X 4WD shift switch (2WD) is not equipped, but it
is displayed.
AUTO SW [On/Off] X 4WD shift switch signal (AUTO) is displayed.
4H SW [On/Off] X 4WD shift switch signal (4H) is displayed.
4L SW [On/Off] X 4WD shift switch signal (4L) is displayed.
T/M RANGE [D/N/R/P] X A/T shift selector position via CAN communica-
tion line is displayed.
N RANGESW [On/Off] X A/T shift selector position (N) via CAN commu-
nication line is displayed.
R RANGE SW [On/Off] X A/T shift selector position (R) via CAN commu-
nication line is displayed.
ING SW [On/Off] X Ignition switch status is displayed.
TCS OPER [On/Off] X TCS operation status via CAN communication
line is displayed.
VDC OPER [On/Off] X VDC operation status via CAN communication
line is displayed.
Revision: 2010 May2011 QX56

TRANSFER CONTROL UNITDLN-27
< ECU DIAGNOSIS INFORMATION > [TRANSFER: ATX90A]
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7
(Y) Ground
Transfer fluid tempera-
ture sensor power supply Input Engine running 0 – 5V
9
(G) Ground Transfer internal speed
sensor (GND) —Always 0 V
10
(Y/G) Ground Transfer internal speed
sensor (IMP)
Input IGN ON Transfer motor driving
11
(V) Ground 4WD shift SW (4Lo) Input IGN ON 4WD shift switch: 4L Battery voltage
4WD shift switch: Except
4L
0 V
12
(L) —CAN-H Input/
Output ——
13
(P) —CAN-L
Input/
Output ——
14
(W/R) Ground 4WD shift SW (AUTO) Input IGN ON 4WD shift switch: AUTO Battery voltage
4WD shift switch: Except
AUTO
0 V
15
(P/B) Ground Transfer rotary position
sensor (PWM)
Input IGN ON
16
(LG) Ground
Transfer rotary position
sensor (GND) —Always 0 V
17
(W/L) Ground Transfer lock position
sensor power supply InputIGN ON 5V
10 seconds or more later after ignition
switch turned OFF 0V
18
(BR/Y) Ground Transfer rotary position
sensor power supply
InputIGN ON 5V
10 seconds or more later after ignition
switch turned OFF 0V
20
(GR) Ground
Transfer control unit pow-
er supply Input Always Battery voltage
25
(P/L) Ground Hi-Lo position sensor 3 Input/
Output Engine
running
(Never
drive the
vehicle.) 4WD mode: AUTO or 4H 0 V
4WD mode: Shifting 5 V
4WD mode: 4L 5 V
28
(W) Ground
Transfer motor tempera-
ture sensor power supply InputIGN ON 0 – 5V
IGN OFF 0V
Te r m i n a l N o .
(Wire color) Description
Condition Value (Approx.)
+ - Signal name Input/
Output
JPDIE0267GB
JPDIE0268GB
Revision: 2010 May2011 QX56

DLN-28
< ECU DIAGNOSIS INFORMATION >[TRANSFER: ATX90A]
TRANSFER CONTROL UNIT
CAUTION:
When using circuit tester to measure voltage for in
spection, be sure not to extend forcibly any con-
nector terminals.
Fail-SafeINFOID:0000000006222228
 If any malfunction occurs in 4WD electrical system, and control unit detects the malfunction, 4WD warning
lamp on combination meter turns ON to indicate system malfunction.
 When 4WD warning lamp is ON, vehicle changes to rear-wheel drive or shifts to 4-wheel drive (front-wheels
still have some driving torque).
29
(LG/R) Ground Hi-Lo position sensor 2
Input/
Output Engine
running
(Never
drive the
vehicle.)
Always 0 V
30
(R/B) Ground Transfer lock position
sensor (GND) —Always 0 V
31
(L/O) Ground Transfer internal speed
sensor (DIR)
Input IGN ONWhen changing the trans-
fer motor rota
tion direc-
tion.
32
(BR/R) Ground IGN SW Input IGN ON Battery voltage
IGN OFF 0V
35
(R) Ground 4WD shift SW (4H) Input IGN ON 4WD shift switch: 4H Battery voltage
4WD shift switch: Except
4H
0 V
36
(L/R) Ground Transfer fluid tempera-
ture sensor (GND)
—Always 0 V
38
(G/O) Ground
Transfer lock position
sensor signal Input IGN ON
39
(R/W) Ground Transfer internal speed
sensor power supply
InputIGN ON 8 V
IGN OFF 0V
41
(W/R) Ground Transfer control actuator
power supply Input Always Battery voltage
43
(G/R) Ground Motor drive B Input/
Output Transfer motor driving 0V - Battery voltage
44
(B) Ground GND — Always 0 V
45
(G/Y) Ground Motor drive A Input/
Output Transfer motor driving 0V - Battery voltage
46
(B) Ground Transfer control actuator
(GND)
—Always 0 V
Te r m i n a l N o .
(Wire color) Description
Condition Value (Approx.)
+ - Signal name Input/
Output
JPDIE0269GB
JPDIE0268GB
Revision: 2010 May2011 QX56

DLN-52
< DTC/CIRCUIT DIAGNOSIS >[TRANSFER: ATX90A]
P1807 OUT PUT SHAFT SPEED SENSOR
P1807 OUT PUT SHAFT SPEED SENSOR
DTC LogicINFOID:0000000006222246
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 for approximately 1minute.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P1807” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-52, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222247
1.PERFORM TCM SELF-DIAGNOSIS
With CONSULT-III
Perform self-diagnosis for “TRANSMISSION”.
Is any DTCs detected?
YES >> Check the DTC.
NO >> GO TO 2.
2.ERASE SELF-DIAGNOSTIC RESULT
With CONSULT-III
1. Erase self-diagnostic results for “ALL MODE AWD/4WD”.
2. Start the engine and drive vehicle at 30 km/h (19 MPH) or more.
3. Check that A/T CHECK indictor lamp turns OFF.
Does A/T CHECK indicator lamp turn OFF?
YES >> GO TO 3.
NO >> Refer to TM-165, "
Symptom Table".
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
"P1807" 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
P1807 VHCL SPEED SEN-AT  Malfunction is detected in output
speed signal that is output from TCM
through CAN communication.
 Improper signal is input while driving.  Harness or connector (CAN communi-
cation line)
TCM
- Internal malfunction of TCM
- Output speed signal error
Revision: 2010 May2011 QX56

P1808 WHEEL SPEED SENSORDLN-53
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
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P1808 WHEEL SPEED SENSOR
DTC LogicINFOID:0000000006222248
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 for approximately 1minute.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P1808” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-53, "DTC Logic".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222249
1.PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT-III
Perform self-diagnosis for “ABS”.
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. Start the engine and drive vehicle at 30 km/h (19 MPH) or more.
3. Check that ABS warning lamp turns OFF.
Does ABS warning lamp turn OFF?
YES >> GO TO 3.
NO >> Refer to BRC-122, "
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
"P1808" 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
P1808 VHCL SPEED SEN-ABS  Malfunction is detected in vehicle
speed signal that is output from ABS
actuator and electric unit (control unit)
through CAN communication.
 Improper signal is input while driving.  Harness or connector (CAN communi-
cation line)
 Malfunction of ABS actuator and elec-
tric unit (control unit)
- Malfunction of ABS actuator and elec-
tric unit (control unit) circuit error
- Vehicle speed signal error
Revision: 2010 May2011 QX56

P180D TRANSFER ROTARY POSITION SENSORDLN-57
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
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P180D TRANSFER ROTARY POSITION SENSOR
DTC LogicINFOID:0000000006222253
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
“P180D” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-57, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222254
1.CHECK TRANSFER ROTARY POSITION 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 ROTARY POSI TION SENSOR POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect transfer rotary pos ition sensor harness connector.
3. Turn the ignition switch ON.
CAUTION:
Never start the engine.
4. Check the voltage between transfer rotary position sensor harness connector terminals.
DTC Display item Malfunction detected condition Possible cause
P180D ROTARY POSITION SEN Malfunction is detected in transfer rotary
position sensor.Transfer rotary position sensor
 Transfer rotary po
sition sensor error
 Transfer rotary posi tion sensor circuit
error
+
−Vol tag e
Transfer control unit
Connector Terminal
E59 15 Ground
JPDIE0268GB
+ −
Vo l ta g e
Transfer rotary position sensor
Connector Terminal F41 1 2 Approx. 5 V
Revision: 2010 May2011 QX56