AUX INFINITI QX4 2005 Factory Service Manual

DTC P1721 VEHICLE SPEED SENSOR MTR
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Revision: October 20052005 QX56
DTC P1721 VEHICLE SPEED SENSOR MTRPFP:24814
DescriptionECS00CGZ
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 ValueECS00CH0
On Board Diagnosis LogicECS00CH1

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 CauseECS00CH2
Harness or connectors
(The sensor circuit is open or shorted.)
DTC Confirmation ProcedureECS00CH3
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 - 1 3 4 , "
Diagnostic Procedure" .
Item name Condition Display value (km/h)
VHCL/S SE·MTR During driving Approximately matches the speedometer reading.
BCIA0030E

TERMINOLOGY
GI-51
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Revision: October 20052005 QX56
Exhaust gas recirculation control-BPT
valveEGRC-BPT valve BPT valve
Exhaust gas recirculation control-solenoid
valveEGRC-solenoid valve EGR control solenoid valve
Exhaust gas recirculation temperature sen-
sor
EGRT sensor Exhaust gas temperature sensor
EGR temperature sensor
Flash electrically erasable programmable
read only memoryFEEPROM ***
Flash erasable programmable read only
memoryFEPROM ***
Flexible fuel sensor FFS ***
Flexible fuel system FF system ***
Fuel pressure regulator *** Pressure regulator
Fuel pressure regulator control solenoid
valve*** PRVR control solenoid valve
Fuel trim FT ***
Heated Oxygen sensor HO2S Exhaust gas sensor
Idle air control system IAC system Idle speed control
Idle air control valve-air regulator IACV-air regulator Air regulator
Idle air control valve-auxiliary air control
valveIACV-AAC valve Auxiliary air control (AAC) valve
Idle air control valve-FICD solenoid valve IACV-FICD solenoid valve FICD solenoid valve
Idle air control valve-idle up control sole-
noid valveIACV-idle up control solenoid valve Idle up control solenoid valve
Idle speed control-FI pot ISC-FI pot FI pot
Idle speed control system ISC system ***
Ignition control IC ***
Ignition control module ICM ***
Indirect fuel injection system IFI system ***
Intake air IA Air
Intake air temperature sensor IAT sensor Air temperature sensor
Knock *** Detonation
Knock sensor KS Detonation sensor
Malfunction indicator lamp MIL Check engine light
Manifold absolute pressure MAP ***
Manifold absolute pressure sensor MAPS ***
Manifold differential pressure MDP ***
Manifold differential pressure sensor MDPS ***
Manifold surface temperature MST ***
Manifold surface temperature sensor MSTS ***
Manifold vacuum zone MVZ ***
Manifold vacuum zone sensor MVZS ***
Mass air flow sensor MAFS Air flow meter
Mixture control solenoid valve MC solenoid valve Air-fuel ratio control solenoid valve
Multiport fuel injection System MFI system Fuel injection controlNEW TERMNEW ACRONYM /
ABBREVIATIONOLD TERM

MA-24
CHASSIS AND BODY MAINTENANCE
Revision: October 20052005 QX56
Changing A/T FluidELS001C1
1. Run the engine to warm up the ATF.
2. Stop the engine.
3. Remove the bolt for the ATF level gauge.
4. Drain the ATF from the drain plug hole and refill the transmission
with new ATF. Always refill same volume with drained fluid and
use the dipstick to check the fluid level as shown. Add fluid as
necessary.

To flush out the old fluid from the coolers, pour new fluid into the charging pipe with the engine idling
and at the same time drain the old fluid from the auxiliary transmission oil cooler hose return line.

When the color of the fluid coming out of the auxiliary transmission oil cooler hose return line is about
the same as the color of the new fluid, flushing out the old fluid is complete. The amount of new trans-
mission fluid used for flushing should be 30% to 50% of the specified capacity.
CAUTION:

Use only Genuine NISSAN ATF Matic Fluid J. Do not mix with other fluid.

Using automatic transmission fluid other than Genuine NISSAN ATF Matic Fluid J will cause
deterioration in driveability and automatic transmission durability, and may damage the auto-
matic transmission, which is not covered by the warranty.

When filling the transmission with fluid, do not spill the ATF on any heat generating parts such
as the exhaust manifold.
5. Check the fluid level and condition. Refer to MA-22, "
Checking A/T Fluid" . If the fluid is still dirty, repeat
steps 2 through 5.
6. Install the ATF level gauge in the fluid charging pipe and install the level gauge bolt. Tighten the level
gauge bolt to specification.
Changing Transfer FluidELS001H0
DRAINING
1. Stop the engine.
2. Remove the drain plug and gasket to drain the transfer fluid as
shown.
3. Install the new gasket on the drain plug and install the drain plug
in the transfer. Tighten the drain plug to specification.
CAUTION:
Do not reuse the gasket.
WLIA0014E
Transmission fluid type and capacity : Refer to MA-11, "Fluids and Lubricants" .
Drain plug : Refer to AT-250, "
Components" .
Level gauge bolt : Refer to AT-250, "
Components" .
Drain plug : Refer to TF-144, "
COMPONENTS" .
SM A44 4B