2007 INFINITI QX56 Factory Service Manual

oil capacities radio controls check transmission fluid dimensions coolant capacity steering wheel adjustment

Page 193 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT
AT-123
< SERVICE INFORMATION >
D
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AT
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2. Check resistance between terminals.
3. If NG, replace the A/T fluid temperature sensor

Page 194 of 3061

INFINITI QX56 2007 Factory Service Manual AT-124
< SERVICE INFORMATION >
DTC P1721 VEHICLE SPEED SENSOR MTR
DTC P1721 VEHICLE SPEED SENSOR MTR
DescriptionINFOID:0000000003532336
The vehicle speed sensor·MTR signal is transmitted from combina

AT-124
< SERVICE INFORMATION >
DTC P1721 VEHICLE SPEED SENSOR MTR
DTC P1721 VEHICLE SPEED SENSOR MTR
DescriptionINFOID:0000000003532336
The vehicle speed sensor·MTR signal is transmitted from combination meter to TCM by CAN communication
line. The signal functions as an auxiliary device to the revolution sensor when it is malfunctioning. The TCM
will then use the vehicle speed sensor·MTR signal.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000003532337
On Board Diagnosis LogicINFOID:0000000003532338
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1721 VHE SPD SE·MTR” with CONSULT-II is detected when TCM does not
receive the proper vehicle speed sensor MTR signal (input by CAN communication) from combination meter.
Possible CauseINFOID:0000000003532339
Harness or connectors
(The sensor circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000003532340
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine and maintain the following conditions for at least 5
consecutive seconds.
ACCELE POS: 1/8 or less
VHCL SPEED SE: 30 km/h (17 MPH) or more
4. If DTC is detected, go to AT-124, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003532341
1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer AT-83, "
CONSULT-II Function (A/T)".
Is a malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to AT- 9 1.
NO >> GO TO 2.
2.CHECK INPUT SIGNAL
With CONSULT-II
Item name Condition Display value (km/h)
VHCL/S SE·MTR During driving Approximately matches the speedometer reading.
BCIA0031E

Page 195 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1721 VEHICLE SPEED SENSOR MTR
AT-125
< SERVICE INFORMATION >
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1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSU

Page 196 of 3061

INFINITI QX56 2007 Factory Service Manual AT-126
< SERVICE INFORMATION >
DTC P1730 A/T INTERLOCK
DTC P1730 A/T INTERLOCK
DescriptionINFOID:0000000003532342
• Fail-safe function to detect interlock conditions.
On Board Diagnosis LogicINFOID:

Page 197 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1730 A/T INTERLOCK
AT-127
< SERVICE INFORMATION >
D
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l: NG, X: OK
Diagnosis ProcedureINFOID:0000000003532347
1.SELF-DIAGNOSIS
With CONSULT-II
1. Drive vehicle.
2. St

Page 198 of 3061

INFINITI QX56 2007 Factory Service Manual AT-128
< SERVICE INFORMATION >
DTC P1731 A/T 1ST ENGINE BRAKING
DTC P1731 A/T 1ST ENGINE BRAKING
DescriptionINFOID:0000000003532348
Fail-safe function to prevent sudden decrease in speed by engine bra

Page 199 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1731 A/T 1ST ENGINE BRAKING
AT-129
< SERVICE INFORMATION >
D
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1. Start the engine.
2. Select “SELECTION FROM MENU” in “DATA MONITOR” for "A/
T" with CONSULT-I

Page 200 of 3061

INFINITI QX56 2007 Factory Service Manual AT-130
< SERVICE INFORMATION >
DTC P1752 INPUT CLUTCH SOLENOID VALVE
DTC P1752 INPUT CLUTCH SOLENOID VALVE
DescriptionINFOID:0000000003532354
Input clutch solenoid valve is controlled by the TCM in re

AT-130
< SERVICE INFORMATION >
DTC P1752 INPUT CLUTCH SOLENOID VALVE
DTC P1752 INPUT CLUTCH SOLENOID VALVE
DescriptionINFOID:0000000003532354
Input clutch solenoid valve is controlled by the TCM in response to signals sent from the PNP switch, vehicle
speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then be shifted to the
optimum position.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000003532355
On Board Diagnosis LogicINFOID:0000000003532356
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1752 I/C SOLENOID/CIRC” with CONSULT-II is detected under the following con-
ditions.
- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM detects as irregular by comparing target value with monitor value.
Possible CauseINFOID:0000000003532357
• Harness or connectors
(The solenoid circuit is open or shorted.)
• Input clutch solenoid valve
DTC Confirmation ProcedureINFOID:0000000003532358
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 5
consecutive seconds.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 3rd ⇒ 4th Gear (I/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
5. If DTC is detected go to AT-130, "
Diagnosis Procedure".
WITH GST
Follow the procedure “With CONSULT-II”.
Diagnosis ProcedureINFOID:0000000003532359
1.CHECK INPUT SIGNAL
With CONSULT-II
Item name Condition Display value (Approx.)
I/C SOLENOIDInput clutch disengaged. Refer to AT- 2 0
. 0.6 - 0.8 A
Input clutch engaged. Refer to AT- 2 0
.0 - 0.05 A
BCIA0031E

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