2006 INFINITI QX56 Factory Service Manual

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Page 153 of 3383

INFINITI QX56 2006 Factory Service Manual AT-78
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
48
Others Shift point is low in “
D”
position. ON vehicle1. Vehicle speed sensor A/T and vehicle speed sensor MTR
AT- 111
,
AT- 1 3 2
2.

Page 154 of 3383

INFINITI QX56 2006 Factory Service Manual TROUBLE DIAGNOSISAT-79
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M A
B
AT
Revision: November 2009 2006 QX5653
Others Vehicle dose not
decelerate by engine
brake.
Refer to
AT-218,
"Vehicle Does Not
Decelerate By Engine
B

Page 155 of 3383

INFINITI QX56 2006 Factory Service Manual AT-80
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
56
Others Maximum speed low.
ON vehicle
1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. Accelerator pedal position sensorAT- 1

Page 156 of 3383

INFINITI QX56 2006 Factory Service Manual TROUBLE DIAGNOSISAT-81
DE
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M A
B
AT
Revision: November 2009 2006 QX56
60
Others Vehicle runs with
transmission in
“N ”
position.
Refer to AT-181, "In
“N” Position, Vehicle
M

Page 157 of 3383

INFINITI QX56 2006 Factory Service Manual AT-82
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
65 OthersEngine speed does
not return to idle.
Refer to
AT-208,
"Engine Speed Does
Not Return to Idle" .ON vehicle 1. Fluid level and state

Page 158 of 3383

INFINITI QX56 2006 Factory Service Manual TROUBLE DIAGNOSISAT-83
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Revision: November 2009 2006 QX56
TCM Input/Output Signal Reference ValuesECS00CEO
A/T ASSEMBLY HARNESS CONNECTOR TERMINAL LAYOUT
TCM INSPECTION TABLE

Page 159 of 3383

INFINITI QX56 2006 Factory Service Manual AT-84
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
CONSULT-II Function (A/T)ECS00CEP
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II REFER

AT-84
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
CONSULT-II Function (A/T)ECS00CEP
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II REFERENCE VALUE
NOTICE:
1. The CONSULT-II electrically displays shift timing and lock-up timing (that is, operation timing of each sole-
noid).
Check for time difference between actual shift timing and the CONSULT-II display. If the difference is
noticeable, mechanical parts (except solenoids, sensors, etc.) may be malfunctioning. Check mechanical
parts using applicable diagnostic procedures.
2. Shift schedule (which implies gear position) displayed on CONSULT-II and that indicated in Service Man- ual may differ slightly. This occurs because of the following reasons:
–Actual shift schedule has more or less tolerance or allowance,
–Shift schedule indicated in Service Manual refers to the point where shifts start, and
–Gear position displayed on CONSULT-II indicates the point where shifts are completed.
3. Display of solenoid valves on CONSULT-II changes at the start of shifting, while gear position is displayed upon completion of shifting (which is computed by TCM).
TCM diagnostic mode Description
WORK SUPPORT Supports inspections and adjustments. Commands are transmitted to the TCM for setting the status
suitable for required operation, input/output signals are received from the TCM and received data is
displayed.
SELF-DIAG RESULTS Displays TCM self-diagnosis results.
DATA MONITOR Displays TCM input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
FUNCTION TEST Conducted by CONSULT-II instead of a technician to determine whether each system is
“OK ” or
“ NG ”.
ECU PART NUMBER TCM part number can be read.
Item name Condition Display value (Approx.)
ATF TEMP SE 1 0°C (32 ° F) - 20 °C (68 °F) - 80 °C (176 °F) 3.3 - 2.7 - 0.9 V
ATF TEMP SE 2 3.3 - 2.5 - 0.7 V
TCC SOLENOID When perform slip lock-up
0.2 - 0.4 A
When perform lock-up 0.4 - 0.6 A
SLCT LVR POSI Selector lever in
“N ”,“ P ” position. N/P
Selector lever in “R ” position. R
Selector lever in “D ” position. D
Selector lever in “4 ” position. 4
Selector lever in “3 ” position. 3
Selector lever in “2 ” position. 2
Selector lever in “1 ” position. 1
VHCL/S SE ·A/T During driving Approximately matches the
speedometer reading.
ENGINE SPEED Engine running Closely matches the tachometer
reading.
LINE PRES SOL During driving 0.2 - 0.6 A
TURBINE REV During driving (lock-up ON) Approximately matches the
engine speed.
VHCL/S SE ·MTR During driving Approximately matches the
speedometer reading.

Page 160 of 3383

INFINITI QX56 2006 Factory Service Manual TROUBLE DIAGNOSISAT-85
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Revision: November 2009 2006 QX56
ATF PRES SW 1Front brake engaged. Refer to
AT- 2 0ON
Front brake disengaged. Refer to AT- 2 0
OFF
ATF PRES SW 2 Low

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