INFINITI QX56 2011 Factory Service Manual

U1000 CAN COMM CIRCUITTM-103
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000006226798
CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle mul-
tiplex communication line with high data communica tion speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicl e, and each control unit shares information and links
with other control units during operation (not independently ). In CAN communication, control units are con-
nected with 2 communication lines (CAN-H line, CAN-L li ne) allowing a high rate of information transmission
with less wiring. Each control unit transmits/recei ves data but selectively reads required data only.
DTC LogicINFOID:0000000006226799
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. Run engine for at least 2 cons ecutive seconds at idle speed.
3. Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”
Is
“U1000” detected?
YES >> Go to TM-103, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226800
Go to LAN-18, "Trouble Diagnosis Flow Chart".
DTC Trouble diagnosis name DTC is detected if... Possible cause
U1000 CAN Communication Line TCM is not transmitting or re-
ceiving CAN communication
signal for 2 seconds or more. Harness or connectors
(CAN communication line is
open or shorted.)
TCM
Revision: 2010 May2011 QX56

TM-104
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P0615 STARTER RELAY
P0615 STARTER RELAY
DescriptionINFOID:0000000006226801
TCM prohibits cranking other than at “P” or “N” position.
DTC LogicINFOID:0000000006226802
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. Shift the selector lever to “P” and “N” positions.
2. Turn ignition switch ON and wait 2 seconds or more.
3. Perform “Self Diagnostic Results” in “TRANSMISSION”.
Is
“P0615” detected?
YES >> Go to TM-104, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226803
1.CHECK STARTER RELAY SIGNAL
1. Turn ignition switch ON.
2. Check voltage between IPDM E/R connector terminal and ground.
Is the inspection result normal?
YES >> Check starter relay circuit. Refer to STR-7, "Wiring Diagram".
NO >> GO TO 2.
2. CHECK HARNESS BETWEEN A/T ASSEMBLY AND IPDM E/R (PART 1)
1. Turn ignition switch OFF.
2. Disconnect A/T assembly c onnector and IPDM E/R connector.
3. Check the continuity between A/T assembly vehi cle side harness connector terminal and IPDM E/R vehi-
cle side harness connector terminal.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P0615 Starter Relay Circuit The starter monitor value is
OFF when the ignition switch is
ON at the “P” and “N” positions. Harness or connectors
(Starter relay and TCM circuit
is open or shorted.)
 Starter relay circuit
IPDM E/R connector
GroundCondition Voltage (Approx.)
Connector Terminal
E15 48 Selector lever in “P” and
“N” positions.
Battery voltage
Selector lever in other
positions. 0 V
Revision: 2010 May2011 QX56

P0615 STARTER RELAYTM-105
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK HARNESS BETWEEN A/T ASSE MBLY AND IPDM E/R (PART 2)
Check the continuity between A/T assembly vehicle side harness connector terminal and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK JOINT CONNECTOR
1. Remove joint connector. Refer to TM-182, "
Exploded View".
2. Check the continuity between joint connector terminals.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace damaged parts.
5.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.
A/T assembly vehicle side harness connector IPDM E/R vehicle side harness connector Continuity
Connector Terminal Connector Terminal
F51 9 E15 48 Existed
A/T assembly vehicle side harness connector GroundContinuity
Connector Terminal
F51 9 Not existed
A/T assembly harness connector side TCM harness connector side Continuity
Te r m i n a l Te r m i n a l
99Existed
Revision: 2010 May2011 QX56

TM-106
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P0705 TRANSMISSION RANGE SWITCH A
P0705 TRANSMISSION RANGE SWITCH A
DTC LogicINFOID:0000000006226804
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 “ACCELE POSI” and “VHCL/S SE-A/T” in “Data Monitor” in “TRANSMISSION”.
3. Shift the selector lever throughout the entire shift positi on from “P” to “D”. (Hold the selector lever at each
position for 2 seconds or more)
4. Drive vehicle and maintain the following conditions for 2 seconds or more.
5. Perform “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P0705” detected?
YES >> Go to TM-106, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226805
1.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
P0705 Transmission Range Switch A
Circuit (PRNDL Input) The TCM detects an ON/OFF
combination pattern other than
that of the transmission range
switches 1, 2, 3 and 4. (For ON/
OFF combination patterns of
transmission range switches,
refer to
TM-12, "
A/T CONTROL
SYSTEM : Transm ission Range
Switch".)  Harness or connectors
(Transmission range switch-
es 1, 2, 3, 4 and TCM circuit
is open or shorted.)
 Transmission range switches
1, 2, 3 and 4
ACCELE POSI : More than 1.0/8
VHCL/S SE-A/T : 10 km/h (7 MPH) or more
Revision: 2010 May2011 QX56

P0710 TRANSMISSION FLUID TEMPERATURE SENSOR A
TM-107
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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P0710 TRANSMISSION FLUI D TEMPERATURE SENSOR A
DTC LogicINFOID:0000000006226806
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 14 minutes or more.
4. Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P0710” detected?
YES >> Go to TM-107, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226807
1.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".
DTC Trouble diagnosis name DTC is detected if... Possible cause
P0710 Transmission Fluid Tempera-
ture Sensor A Circuit TCM judges that the A/T fluid temperature is -40
°C (-40
° F) or less continuously for 5 seconds while driving at 10
km/h (7 MPH) or more.  Harness or connectors
(Sensor circuit is open.)
 A/T fluid temperature sensor
TCM judges that the A/T fluid temperature is 180 °C (356
° F) or more continuously for 5 seconds.  Harness or connectors
(Sensor circuit is short.)
 A/T fluid temperature sensor
TCM judges the following conditions while driving the ve-
hicle at 10 km/h (7 MPH) or more:
 The time required for A/T fluid temperature to rise by 1 °C (1.8 °F) exceeds 14 minutes when A/T fluid tem-
perature is -20 °C (-4 °F) or less.
 The time required for A/T fluid temperature to rise by 1 °C (1.8 °F) exceeds 7 minutes when A/T fluid tem-
perature is between -19 °C (-2 °F) and 0 °C (32 °F).
 The time required for A/T fluid temperature to rise by 1 °C (1.8 °F) exceeds 4 minutes when A/T fluid tem-
perature is between 1 °C (34 °F) and 20 °C (68 °F).  Harness or connectors
(Sensor circuit is stuck.)
 A/T fluid temperature
sensor
SLCT LVR POSI : D
VHCL/S SE-A/T : 10 km/h (7 MPH) or more
Revision: 2010 May2011 QX56

TM-108
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P0710 TRANSMISSION FLUID
TEMPERATURE SENSOR A
NO >> Repair or replace damaged parts.
Revision: 2010 May2011 QX56

P0717 INPUT SPEED SENSOR ATM-109
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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P0717 INPUT SPEED SENSOR A
DTC LogicINFOID:0000000006226808
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”, “GEAR”, “VHCL/S SE-A/ T”, “W/O THL POS” and “ENGINE SPEED” in “Data
Monitor” in “TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 5 seconds or more. CAUTION:
Keep the same gear position.
NOTE:
Driving the vehicle uphill (increased engine load) will hel p maintain the driving conditions required for this
test.
4. Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P0717” detected?
YES >> Go to TM-109, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226809
1.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
P0717 Input/Turbine Speed Sensor A
Circuit No Signal The revolution of input speed
sensor 1 and/or 2 is 270 rpm or
less. Harness or connectors
(Sensor circuit is open.)
 Input speed sensor 1 and/or 2
SLCT LVR POSI : D
GEAR : 2nd, 3rd, 4th, 5th or 6th
VHCL/S SE-A/T : More than 40 km/h (25 MPH)
W/O THL POS : ON
ENGINE SPEED : More than 1,500 rpm
Revision: 2010 May2011 QX56

TM-110
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P0720 OUTPUT SPEED SENSOR
P0720 OUTPUT SPEED SENSOR
DTC LogicINFOID:0000000006226810
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 “ESTM VSP SIG” 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”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P0720” detected?
YES >> Go to TM-110, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226811
1.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
DTC Trouble diagnosis name DTC is detected if... Possible cause
P0720 Output Speed Sensor Circuit  The vehicle speed detected
by the output speed sensor is
5 km/h (3MPH) or less when
the vehicle speed transmitted
from the combination meter
to TCM is 20 km/h or more.
(Only when starts after the ig-
nition switch is turned ON.)
 The vehicle speed transmit- ted from the combination
meter to TCM does not de-
crease despite the 36 km/h
(23 MPH) or more of deceler-
ation in vehicle speed detect-
ed by the output speed
sensor. when the vehicle
speed detected by the output
speed sensor is 36 km/h (23
MPH) or more and the vehicle
speed transmitted from the
combination meter to TCM is
24 (15 MPH) or more.  Harness or connectors
(Sensor circuit is open.)
 Output speed sensor
ESTM VSP SIG : 40 km/h (25 MPH) or more
Revision: 2010 May2011 QX56

P0720 OUTPUT SPEED SENSORTM-111
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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YES >> GO TO 2.
NO >> Repair or replace damaged parts.
2.REPLACE OUTPUT SPEED SENSOR AND CHECK DTC
1. Replace output speed sensor. Refer to TM-211, "
Exploded View".
2. Perform “DTC CONFIRMATION PROCEDURE”. Refer to TM-110, "
DTC Logic".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace control valve & TCM. Refer to TM-182, "
Exploded View".
Revision: 2010 May2011 QX56

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