2009 INFINITI QX56 Factory Service Manual

air suspension 4WD diagram buttons TPMS reset child restraint

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INFINITI QX56 2009 Factory Service Manual
DIAGNOSIS SYSTEM (TCM)TM-33
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
4GR INCORRECT RA-
TIO A/T cannot shift to 4th gear P0734 P0734
TM-61
5GR INCORRECT RA-
TIO A/T cannot shift to 5th

DIAGNOSIS SYSTEM (TCM)TM-33
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
4GR INCORRECT RA-
TIO A/T cannot shift to 4th gear P0734 P0734
TM-61
5GR INCORRECT RA-
TIO A/T cannot shift to 5th gear P0735 P0735
TM-63
TORQUE CONVERT-
ER Normal voltage not applied to solenoid due to cut line,
short, or the like P0740 P0740
TM-64
TORQUE CONVERT-
ER A/T cannot perform lock-up even if electrical circuit is
good.
TCM detects as irregular by comparing difference val-
ue with slip rotation. P0744 P0744*2
TM-67
PC SOLENOID 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
TM-68
TP SENSOR TCM does not receive the proper accelerator pedal po-
sition signals (input by CAN communication) from
ECM. P1705 P1705
TM-70
TRANS FLUID TEMP
SEN During running, the ATF temperature sensor signal
voltage is excessively high or low P1710 P0710
TM-72
VEHICLE SPEED SIG-
NAL Signal (CAN communication) from vehicle speed sen-
sor MTR not input due to cut line or the like
Unexpected signal input during running P1721 —
TM-74
INTERLOCK Except during shift change, the gear position and ATF
pressure switch states are monitored and comparative
judgement made. P1730 P1730
TM-76
1GR 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 "1" position, a mal-
function is detected. P1731 —
TM-78
INPUT CLUTCH SOLE-
NOID Normal voltage not applied to solenoid due to function-
al malfunction, cut line, short, or the like
TCM detects as irregular by comparing target value
with monitor value. P1752 P1752
TM-80
FR BRAKE SOLENOID Normal voltage not applied to solenoid due to function-
al malfunction, cut line, short, or the like
TCM detects as irregular by comparing target value
with monitor value. P1757 P1757
TM-82
DRCT CLUTCH SOLE-
NOID 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
TM-84
HLR CLUTCH SOLE-
NOID Normal voltage not applied to solenoid due to function-
al malfunction, cut line, short, or the like
TCM detects as irregular by comparing target value
with monitor value. P1767 P1767
TM-86
L C BRAKE SOLENOID Normal voltage not applied to solenoid due to function-
al malfunction, cut line, short, or the like P1772 P1772
TM-88
Items (CONSULT-III
screen terms) Malfunction is detected when... TCM self-di-
agnosis OBD (DTC)
Reference page
“TRANSMIS-
SION” with
CONSULT-III MIL indicator
lamp*1, “EN-
GINE” with
CONSULT-III or
GST
Revision: December 20092009 QX56

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INFINITI QX56 2009 Factory Service Manual
TM-34
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (TCM)
*1: Refer to EC-55, "Malfunction Indicator Lamp (MIL)".
*2:These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.
DA

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INFINITI QX56 2009 Factory Service Manual
DIAGNOSIS SYSTEM (TCM)TM-35
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
RANGE SW 1 (ON-OFF display) X — X
RANGE SW 2 (ON-OFF display) X — X
RANGE SW 3 (ON-OFF display) X — X
RANGE SW

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INFINITI QX56 2009 Factory Service Manual
TM-36
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (TCM)
DTC & SRT CONFIRMATION
DTC Work Support Mode
D POSI IND (ON-OFF display) — — X
4TH POSI IND (ON-OFF display) — — X
3RD POSI IND (ON-OFF dis

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INFINITI QX56 2009 Factory Service Manual
DIAGNOSIS SYSTEM (TCM)TM-37
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
Diagnosis Procedure without CONSULT-IIIINFOID:0000000004024115
OBD-II SELF-DIAGNOSTIC PROCEDURE (WITH GST)
Refer to

DIAGNOSIS SYSTEM (TCM)TM-37
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
Diagnosis Procedure without CONSULT-IIIINFOID:0000000004024115
OBD-II SELF-DIAGNOSTIC PROCEDURE (WITH GST)
Refer to EC-72, "Generic Scan Tool (GST) Function".
OBD-II SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)
Refer to EC-55, "Malfunction Indicator Lamp (MIL)".
TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)
Description
When the ignition switch is switched “ON”, the A/T CHECK indicator lamp lights up for 2 seconds. As a method
for locating the suspect circuit, w hen the self-diagnostics start signal is input, the memory for the malfunction
location is output and the A/T CHECK indicator lamp flashes to display the corresponding DTC.
Diagnostic Procedure
1.CHECK A/T CHECK INDICATOR LAMP
1. Start the engine with selector lever in “P” pos ition. Warm engine to normal operating temperature.
2. Turn ignition switch ON and OFF at least twice, then leave it in the OFF position.
3. Wait 10 seconds.
4. Turn ignition switch ON. (Do not start engine.)
Does A/T CHECK indicator lamp come on for about 2 seconds?
YES >> GO TO 2.
NO >> GO TO TM-119, "A/T Check Indicator Lamp Does Not Come On"
.
2.JUDGEMENT PROCEDURE STEP 1
1. Turn ignition switch OFF.
2. Keep pressing shift lock release button.
3. Move selector lever from “P” to “D” position.
4. Release accelerator pedal. (Set the closed throttle position signal “ON”.)
5. Depress brake pedal. (Stop lamp switch signal “ON”.)
6. Turn ignition switch ON. (Do not start engine.)
7. Wait 3 seconds.
8. Move the selector lever from “D” to “3” position.
9. Release brake pedal. (Stop lamp switch signal “OFF”.)
10. Move the selector lever from “3” to “2” position.
11. Depress brake pedal. (Stop lamp switch signal “ON”.)
DTC work support item Description Check item
1ST GR FUNCTN P0731 Following items for “” be confirmed.
Self-diagnosis status (whether the diagnosis is being performed
or not)
Self-diagnosis result (OK or NG)
Input clutch solenoid valve
Front brake solenoid valve
Direct clutch solenoid valve
High and low reverse clutch solenoid valve
Each clutch
Hydraulic co ntrol circuit
valve
2ND GR FUNCTN P0732
Following items for “” be confirmed.
Self-diagnosis status (whether the diagnosis is being performed
or not)
Self-diagnosis result (OK or NG)
3RD GR FUNCTN P0733 Following items for “” be confirmed.
Self-diagnosis status (whether the diagnosis is being performed
or not)
Self-diagnosis result (OK or NG)
4TH GR FUNCTN P0734 Following items for “” be confirmed.
Self-diagnosis status (whether the diagnosis is being performed
or not)
Self-diagnosis result (OK or NG)
5TH GR FUNCTN P0735 Following items for “” be confirmed.
Self-diagnosis status (whether the diagnosis is being performed
or not)
Self-diagnosis result (OK or NG)
Revision: December 20092009 QX56

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INFINITI QX56 2009 Factory Service Manual
TM-38
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (TCM)
12. Depress accelerator pedal fully and release it.>> GO TO 3.
3.CHECK SELF-DIAGNOSIS CODE
Check A/T CHECK indicator lamp.
Refer to "Judgement Self

Page 3687 of 4171

INFINITI QX56 2009 Factory Service Manual
U1000 CAN COMM CIRCUITTM-39
< COMPONENT DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000003771825
CAN (Controller Area Network) is a ser

U1000 CAN COMM CIRCUITTM-39
< COMPONENT DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000003771825
CAN (Controller Area Network) is a serial communication li ne 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 independent ). 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.
On Board Diagnosis LogicINFOID:0000000003771826
This is an OBD-III self-diagnostic item.
Diagnostic trouble code “U1000” with CONSULT-III is detected when TCM cannot communicate to other
control units.
Possible CauseINFOID:0000000003771827
Harness or connectors
(CAN communication line is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000003771828
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-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “ENGINE” with CONSULT-III.
3. Start engine and wait for at least 6 seconds.
4. If DTC is detected, go to TM-39, "Diagnosis Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000003771829
1.CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-III1. Turn ignition switch “ON” and start engine.
2. Select “SELF-DIAG RESULTS” mode for “TRANSMISSION” with CONSULT-III.
Is any malfunction of the
“CAN COMM CIRCUIT” indicated?
YES >> Go to LAN section. Refer to LAN-14, "Trouble Diagnosis Flow Chart".
NO >> INSPECTION END
Revision: December 20092009 QX56

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INFINITI QX56 2009 Factory Service Manual
TM-40
< COMPONENT DIAGNOSIS >
P0615 STARTER RELAY
P0615 STARTER RELAY
DescriptionINFOID:0000000003771830
TCM prohibits cranking other than at “P” or “N” position.
CONSULT-III Reference Valu

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