2004 INFINITI QX56 Factory Service Manual

rear view mirror ECU coolant reservoir wheel alignment ABS engine overheat

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INFINITI QX56 2004 Factory Service Manual AT-90
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
TCM Input/Output Signal Reference ValuesUCS002D7
A/T ASSEMBLY TERMINAL CONNECTOR LAYOUT
TCM INSPECTION TABLE
Data are reference value and are me

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INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS
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CONSULT-II Function (A/T)UCS002D8
CONSULT-II can display each diagnostic item using the diagnostic test modes shown fol

TROUBLE DIAGNOSIS
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CONSULT-II Function (A/T)UCS002D8
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 SUPPORTSupports 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 TESTConducted 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
AT F T E M P S E 1
0°C (32° F) - 20°C (68°F) - 80°C (176°F)3.2 - 2.5 - 0.8 V
AT F T E M P S E 23.2 - 2.4 - 0.65 V
TCC SOLENOIDWhen perform slip lock-up 0.2 - 0.4 A
When perform lock-up 0.4 - 0.6 A
SLCT LVR POSISelector 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.

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INFINITI QX56 2004 Factory Service Manual AT-92
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
ATF PRES SW 1Front brake engaged. Refer to AT- 2 1ON
Front brake disengaged. Refer to AT- 2 1
OFF
ATF PRES SW 2Low coast brake engaged. Refer to

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INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS
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CONSULT-II SETTING PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions mi

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INFINITI QX56 2004 Factory Service Manual AT-94
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
Display Items List
X: Applicable, —: Not applicable
Items (CONSULT-II
screen terms)Malfunction is detected when...TCM self-
diagnosisOBD-II (

AT-94
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
Display Items List
X: Applicable, —: Not applicable
Items (CONSULT-II
screen terms)Malfunction is detected when...TCM self-
diagnosisOBD-II (DTC)
“A/T” with
CONSULT-IIMIL indicator
lamp*1,
“ENGINE” with
CONSULT-II or
GST
CAN COMM CIRCUIT
When a malfunction is detected in CAN communications U1000 U1000
STARTER RELAY/
CIRC
If this signal is ON other than in P or N position, this is judged to be a
malfunction.
(And if it is OFF in P or N position, this too is judged to be a malfunc-
tion.)P0615 —
TCM
TCM is malfunctioning. P0700 P0700
PNP SW/CIRC
PNP switch 1-4 signals input with impossible pattern
PNP switch 3 monitor terminal cut line
“P” position is detected from N position without any other position
being detected in between.P0705 P0705
VEH SPD SEN/CIR AT
(Revolution sensor)
Signal from vehicle speed sensor A/T (Revolution sensor) not input
due to cut line or the like
Unexpected signal input during running
After ignition switch is turned ON, unexpected signal input from vehicle
speed sensor MTR before the vehicle starts movingP0720 P0720
ENGINE SPEED SIG
TCM does not receive the CAN communication signal from the ECM. P0725 —
TCC SOLENOID/CIRC
Normal voltage not applied to solenoid due to cut line, short, or the like P0740 P0740
A/T TCC S/V FNCTN
A/T cannot perform lock-up even if electrical circuit is good.
TCM detects as irregular by comparing difference value with slip rota-
tion.P0744 P0744*2
L/PRESS SOL/CIRC
Normal voltage not applied to solenoid due to cut line, short, or the like
TCM detects as irregular by comparing target value with monitor value.P0745 P0745
TCM·RAM
TCM memory (RAM) is malfunctioning. P1702 —
TCM·ROM
TCM memory (ROM) is malfunctioning. P1703 —
TP SEN/CIRC A/T
TCM does not receive the proper accelerator pedal position signals
(input by CAN communication) from ECM.P1705 P1705
ATF TEMP SEN/CIRC
During running, the ATF temperature sensor signal voltage is exces-
sively high or lowP1710 P0710
TURBINE REV S/CIRC
TCM does not receive the proper voltage signal from the sensor.
TCM detects an irregularity only at position of 4th gear for turbine revo-
lution sensor 2.P1716 P1716
VEH SPD SE/CIR·MTR
Signal (CAN communication) from vehicle speed sensor MTR not input
due to cut line or the like
Unexpected signal input during runningP1721 —
A/T INTERLOCK
Except during shift change, the gear position and ATF pressure switch
states are monitored and comparative judgement made.P1730 P1730
A/T 1ST E/BRAKING
Each ATF pressure switch and solenoid current is monitored and if a
pattern is detected having engine braking 1st gear other than in the M1
position, a malfunction is detected.P1731 —
I/C SOLENOID/CIRC
Normal voltage not applied to solenoid due to functional malfunction,
cut line, short, or the like
TCM detects as irregular by comparing target value with monitor value.P1752 P1752

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INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS
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I/C SOLENOID FNCTN
TCM detects that actual gear ratio is irregular, and relation between
gear position and condition

TROUBLE DIAGNOSIS
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I/C SOLENOID FNCTN
TCM detects that actual gear ratio is irregular, and relation between
gear position and condition of ATF pressure switch 3 is irregular during
depressing accelerator pedal. (Other than during shift change)
TCM detects that relation between gear position and condition of ATF
pressure switch 3 is irregular during releasing accelerator pedal.
(Other than during shift change)P1754 P1754*2
FR/B SOLENOID/CIRC
Normal voltage not applied to solenoid due to functional malfunction,
cut line, short, or the like
TCM detects as irregular by comparing target value with monitor value.P1757 P1757
FR/B SOLENOID
FNCT
TCM detects that actual gear ratio is irregular, and relation between
gear position and condition of ATF pressure switch 1 is irregular during
depressing accelerator pedal. (Other than during shift change)
TCM detects that relation between gear position and condition of ATF
pressure switch 1 is irregular during releasing accelerator pedal.
(Other than during shift change)P1759 P1759*2
D/C SOLENOID/CIRC
Normal voltage not applied to solenoid due to cut line, short, or the like
TCM detects as irregular by comparing target value with monitor value.P1762 P1762
D/C SOLENOID
FNCTN
TCM detects that actual gear ratio is irregular, and relation between
gear position and condition of ATF pressure switch 5 is irregular during
depressing accelerator pedal. (Other than during shift change)
TCM detects that relation between gear position and condition of ATF
pressure switch 5 is irregular during releasing accelerator pedal.
(Other than during shift change)P1764 P1764*2
HLR/C SOL/CIRC
Normal voltage not applied to solenoid due to functional malfunction,
cut line, short, or the like
TCM detects as irregular by comparing target value with monitor value.P1767 P1767
HLR/C SOL FNCTN
TCM detects that actual gear ratio is irregular, and relation between
gear position and condition of ATF pressure switch 6 is irregular during
depressing accelerator pedal. (Other than during shift change)
TCM detects that relation between gear position and condition of ATF
pressure switch 6 is irregular during releasing accelerator pedal.
(Other than during shift change)P1769 P1769*2
LC/B SOLENOID/CIRC
Normal voltage not applied to solenoid due to functional malfunction,
cut line, short, or the likeP1772 P1772
LC/B SOLENOID FNCT
TCM detects an improper voltage drop when it tries to operate the
solenoid valve.
Condition of ATF pressure switch 2 is different from monitor value, and
relation between gear position and actual gear ratio is irregular.P1774 P1774*2
ATF PRES SW 1/CIRC
TCM detects that actual gear ratio is normal, and relation between
gear position and condition of ATF pressure switch 1 is irregular during
depressing accelerator pedal. (Other than during shift change)P1841 —
ATF PRES SW 3/CIRC
TCM detects that actual gear ratio is normal, and relation between
gear position and condition of ATF pressure switch 3 is irregular during
depressing accelerator pedal. (Other than during shift change)P1843 —
ATF PRES SW 5/CIRC
TCM detects that actual gear ratio is normal, and relation between
gear position and condition of ATF pressure switch 5 is irregular during
depressing accelerator pedal. (Other than during shift change)P1845 — Items (CONSULT-II
screen terms)Malfunction is detected when...TCM self-
diagnosisOBD-II (DTC)
“A/T” with
CONSULT-IIMIL indicator
lamp*1,
“ENGINE” with
CONSULT-II or
GST

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INFINITI QX56 2004 Factory Service Manual AT-96
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
*1: Refer to AT- 4 2 , "Malfunction Indicator Lamp (MIL)" .
*2:These malfunctions cannot be displayed MIL if another malfunction is assigned to

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INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS
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DATA MONITOR MODE
Operation Procedure
1. Perform “CONSULT-II SETTING PROCEDURE” Refer to AT-93, "CONSULT-II SETTING

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