2011 INFINITI QX56 turn signal

TM-112
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P0725 ENGINE SPEED
P0725 ENGINE SPEED
DescriptionINFOID:0000000006226812
The engine speed signal is transmitted from the ECM to the TCM via CAN communication line.
DTC LogicINFOID:0000000006226813
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “SLCT LVR POSI” and “VHCL/S SE-A/T ” in “Data Monitor” in “TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 5 seconds or more.
4. Perform “Self Diagnostic Results” in “TRANSMISSION”.
Is
“P0725” detected?
YES >> Go to TM-112, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226814
1.CHECK DTC OF ECM
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “Self Diagnostic Results” in “ENGINE”.
Is any DTC detected?
YES >> Check DTC detected item. Refer to EC-98, "DTC Index".
NO >> GO TO 2.
2.CHECK DTC OF TCM
With CONSULT-III
Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
Is any DTC other than
“P0725” detected?
YES >> Check DTC detected item. Refer to TM-78, "DTC Index".
NO >> GO TO 3.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P0725 Engine Speed Input Circuit  TCM does not receive the
CAN communication signal
from the ECM.
 The engine speed is more
less 150 rpm even if the vehi-
cle speed is more than 10 km/
h (7 MPH). Harness or connectors
(ECM to TCM circuit is open or
shorted.)
SLCT LVR POSI : D
VHCL/S SE-A/T : More than 10 km/h (7 MPH)
Revision: 2010 May2011 QX56

P1705 TP SENSORTM-137
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
P1705 TP SENSOR
DTC LogicINFOID:0000000006226852
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “SLCT LVR POSI” and “VHCL/S SE-A/T ” in “Data Monitor” in “TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 5 seconds or more.
4. Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
Is
“P1705” detected?
YES >> Go to TM-137, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226853
1.CHECK DTC OF ECM
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “Self Diagnostic Results” in “ENGINE”.
Is any DTC detected?
YES >> Check DTC detect ed item. Refer to EC-98, "DTC Index".
NO >> GO TO 2.
2.CHECK DTC OF TCM
With CONSULT-III
Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
Is any DTC other than
“P1705” detected?
YES >> Check DTC detect ed item. Refer to TM-78, "DTC Index".
NO >> GO TO 3.
3.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace the control valve & TCM. Refer to TM-182, "Exploded View".
NO >> Repair or replace damaged parts.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P1705 Accelerator Peda
l Position Sen-
sor Signal Circuit TCM detects the difference be-
tween two accelerator pedal po-
sition signals received from
ECM via CAN communication.Harness or connectors
(Sensor circuit is open or short-
ed.)
SLCT LVR POSI : D
VHCL/S SE-A/T : 5 km/h (3 MPH) or more
Revision: 2010 May2011 QX56

TM-138
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P1721 VEHICLE SPEED SIGNAL
P1721 VEHICLE SPEED SIGNAL
DescriptionINFOID:0000000006226854
The vehicle speed signal is transmitted from combinati
on meter to TCM via CAN communication line. The sig-
nal functions as an auxiliary device to the output speed sensor when it is malfunctioning. The TCM will then
use the vehicle speed signal.
DTC LogicINFOID:0000000006226855
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
 Always drive vehicle at a safe speed.
 Be careful not to rev engine into the red zone on the tachometer.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “VHCL/S SE-A/T” in “Data Monitor” in “TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 60 seconds or more.
4. Perform “Self Diagnostic Results” in “TRANSMISSION”.
Is
“P1721” detected?
YES >> Go to TM-139, "Diagnosis Procedure".
NO >> INSPECTION END
DTC Trouble diagnosis name DTC is detected if... Possible cause
P1721 Vehicle Speed Signal Circuit  The vehicle speed transmit-
ted from the combination
meter to TCM is 5 km/h
(3MPH) or less when the ve-
hicle speed detected by the
output speed sensor is 20
km/h or more. (Only when
starts after the ignition switch
is turned ON.)
 The vehicle speed detected by the output speed sensor
does not decrease despite
the 36 km/h (23 MPH) or
more of deceleration in vehi-
cle speed received from the
combination meter when the
vehicle speed transmitted
from the combination meter
to TCM is 36 km/h (23 MPH)
or more and the vehicle
speed detected by the output
speed sensor is 24 (15 MPH)
or more. Harness or connectors
(Sensor circuit is open or short-
ed.)
VHCL/S SE-A/T : 40 km/h (25 MPH) or more
Revision: 2010 May2011 QX56

TM-144
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P1815 M-MODE SWITCH
P1815 M-MODE SWITCH
DTC LogicINFOID:0000000006226864
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Turn ignition switch ON.
2. Select “SLCT LVR POSI” and “MANU MODE SW ” in “Data Monitor” in “TRANSMISSION”.
3. Maintain the following each conditions more than 2 seconds.
4. Perform “Self Diagnostic Results” in “TRANSMISSION”.
Is
“P1815” detected?
YES >> Go to TM-144, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226865
1.CHECK MANUAL MODE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/T shift selector connector.
3. Turn ignition switch ON.
4. Check voltage between A/T shift selector vehicle side harness connector terminals.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK MANUAL MODE SWITCH
DTC Trouble diagnosis name DTC is detected if... Possible cause
P1815 Manual Mode Switch Circuit TCM monitors manual mode,
non manual mode, up or down
switch signal, and detects as ir-
regular when impossible input
pattern occurs 2 second or
more. Harness or connectors
(These switches circuit is
open or shorted.)
 Manual mode switch
SLCT LVR POSI : D
MANU MODE SW : ON
A/T shift selector vehicle side harness connector
Voltage (Approx.)
Connector Te r m i n a l
+ −
M57 1
4 Battery voltage
2
3
5
Revision: 2010 May2011 QX56

TOW MODE SYSTEMTM-153
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
TOW MODE SYSTEM
Component Function CheckINFOID:0000000006226876
1.CHECK TOW MODE INDICATOR LAMP FUNCTION
1. Turn ignition switch ON.
2. Check that tow mode indicator lamp turn s ON/OFF when tow mode switch is operated.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to TM-153, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006226877
NOTE:
Tow mode switch is integrated in to SNOW MODE/T OW MODE/VDC OFF switch assembly (2WD models) or
4WD switch assembly (4WD models).
1.CHECK DTC OF TCM
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “Self-Diagnostic Results” in “TRANSMISSION”.
Is any DTC detected?
YES >> Check DTC detect ed item. Refer to TM-78, "DTC Index".
NO >> GO TO 2.
2.CHECK DTC OF COMBINATION METER
With CONSULT-III
Perform “Self-Diagnostic Re sults” in “METER/M&A”.
Is any DTC detected?
YES >> Check DTC detect ed item. Refer to MWI-43, "DTC Index".
NO >> GO TO 3.
3.CHECK COMBINATION METER
With CONSULT-III
1. Select “TOW MODE IND” in “Data Monitor” in “METER/M&A”.
2. Check that “TOW MODE IND” turns ON/OFF when tow mode switch is operated.
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Exploded View".
NO >> GO TO 4.
4.CHECK TOW MODE SWITCH SIGNAL
With CONSULT-III
1. Select “TOW MODE SW” in “Data Monitor” in “TRANSMISSION”.
2. Check that “TOW MODE SW” turns ON /OFF when tow mode switch is operated.
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Exploded View".
NO >> GO TO 5.
5.CHECK TOW MODE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect SNOW MODE/TOW MODE/VDC OFF switch assembly (2WD models) or 4WD switch assem-
bly connector (4WD models).
3. Turn ignition switch ON.
4. Check voltage between SNOW MODE/TOW MODE/VDC OFF switch assembly (2WD models) or 4WD
switch assembly connector (4WD models) vehicle side harness connector terminals.
Revision: 2010 May2011 QX56

TM-162
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
SELECTOR LEVER POSITION INDICATOR
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace damaged parts.
5.CHECK SELECTOR LEVER POSITION INDICATOR
Check selector lever position indicator. Refer to TM-163, "
Component Inspection (Selector Lever Position Indi-
cator)".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-40, "Intermittent Incident".
NO >> Replace damaged parts.
6.CHECK HARNESS BETWEEN A/T SHIFT SELECTOR AND BCM (PART 1)
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between A/T shift selector v ehicle side harness connector terminal and BCM vehicle
side harness connector terminal.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace damaged parts.
7.CHECK HARNESS BETWEEN A/T SHIFT SELECTOR AND BCM (PART 2)
Check continuity between A/T shift selector vehicle side harness connector terminal and ground.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair or replace damaged parts.
8.CHECK BCM INPUT/OUTPUT SIGNAL
Check BCM input/output signal. Refer to BCS-33, "
Reference Value".
Is the inspection result normal?
A/T shift selector connector Shift position switch connector Condition Continuity
Connector Terminal Connector Terminal
M57 4
M281 10
Selector lever in “M”
position. Existed
1, 2, 3, 4, 5, 8, 9, 12 Not existed 12 Selector lever in “D”
position. Existed
1, 2, 3, 4, 5, 8, 9, 10 Not existed
13 1, 2
Selector lever in “P”
position. Existed
3, 4, 5, 8, 9, 10, 12 Not existed 1, 3 Selector lever in “R”
position. Existed
2, 4, 5, 8, 9, 10, 12 Not existed 1, 4 Selector lever in “D”
position. Existed
2, 3, 5, 8, 9, 10, 12 Not existed 1, 5 Selector lever in “N”
position. Existed
2, 3, 4, 8, 9, 10, 12 Not existed
A/T shift selector vehicle side harness connector BCM vehicle side harness connector Continuity
Connector Terminal Connector Terminal
M57 13 M71 104 Existed
A/T shift selector vehicle side harness connector GroundContinuity
Connector Terminal
M57 13 Not existed
Revision: 2010 May2011 QX56

WCS-6
< SYSTEM DESCRIPTION >
SYSTEM
SYSTEM
WARNING CHIME SYSTEM
WARNING CHIME SYSTEM : System DiagramINFOID:0000000006222683
WARNING CHIME SYSTEM : System DescriptionINFOID:0000000006222684
COMBINATION METER
The combination meter sounds the alarm buzzer install ed in the combination meter when receiving the buzzer
output signal transmitted from each unit.
BCM
BCM receives signals from various units and transmits a buzzer output signal to the combination meter via
CAN communication if it judges that the warning buzzer should be activated.
WARNING CHIME FUNCTION LIST
JSNIA3116GB
Warning functions Out line Warning judgment unit Refer to
Light reminder warning chime The warning chime sounds when the ignition
s w i t c h i s i n O F F o r A C C p o s i t i o n w i t h t h e c o m -
bination switch (lighting switch) in the 1st or
2nd position and the driver side door open. BCMWCS-8,
"LIGHT RE-
MINDER
WARNING
CHIME : Sys-
tem Descrip-
tion"
Front fog light reminder warning chime
The warning chime sounds when the ignition
switch is turned to LOCK, OFF or ACC posi-
tion from ON position, with combination switch
(lighting switch) is in AUTO position and the
front fog lamp switch in ON position. BCMWCS-10,
"FRONT FOG
LIGHT RE-
MINDER
WARNING
CHIME : Sys-
tem Descrip-
tion"
Revision: 2010 May2011 QX56

WCS-8
< SYSTEM DESCRIPTION >
SYSTEM
LIGHT REMINDER WARNING CHIME
LIGHT REMINDER WARNING CHIME : System DiagramINFOID:0000000006222543
LIGHT REMINDER WARNING CHIME : System DescriptionINFOID:0000000006222544
WARNING CHIME OPERATION CONDITIONS
If all of the following conditions are fulfilled.
WARNING CHIME CANCEL CONDITIONS
Warning lamp/indicator lampABS warning lamp
The lamp turns ON by suspending communication.
VDC warning lamp
Brake warning lamp
IBA OFF indicator lamp
4WD warning lamp
Malfunction indicator lamp
VDC OFF indicator lamp
CRUISE warning lamp
Low tire pressure warning lamp The lamp blinking caused by suspending communication.
High beam indicator lamp
The lamp turns OFF by suspending communication.
Turn signal indicator lamp
Tail lamp indicator lamp
A/T CHECK indicator lamp
Key warning lamp
ATP warning lamp
Lane departure warning lamp
LDP ON indicator lamp
CRUISE indicator lamp
Oil pressure warning lamp
SNOW mode indicator lamp
TOW mode indicator lamp
CK SUSP indicator lamp
BSW indicator lamp
Function Specifications
JSNIA2421GB
Operation conditions
Ignition switch OFF or ACC position
Combination switch (Lighting
switch) 1st or 2nd position
Driver door Open [front door switch (driver side) ON]
Revision: 2010 May2011 QX56