2010 INFINITI QX56 Factory Service Manual

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Page 3729 of 4210

INFINITI QX56 2010 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.
DAT

Page 3730 of 4210

INFINITI QX56 2010 Factory Service Manual DIAGNOSIS SYSTEM (TCM)TM-35
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
ATF PRES SW 3 (ON-OFF display) XX X —
ATF PRES SW 5 (ON-OFF display) XX X —
ATF PRES SW 6 (ON-OFF display) XX X �

Page 3731 of 4210

INFINITI QX56 2010 Factory Service Manual TM-36
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (TCM)
ONOFF SOL MON (ON-OFF display) ——X LC/B solenoid
P POSI IND (ON-OFF display) —— X —
R POSI IND (ON-OFF display) —— X —
N POSI IND (O

Page 3732 of 4210

INFINITI QX56 2010 Factory Service Manual DIAGNOSIS SYSTEM (TCM)TM-37
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
DTC & SRT CONFIRMATION
DTC Work Support Mode
Diagnosis Procedure without CONSULT-IIIINFOID:0000000005148527
OBD-II S

DIAGNOSIS SYSTEM (TCM)TM-37
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
DTC & SRT CONFIRMATION
DTC Work Support Mode
Diagnosis Procedure without CONSULT-IIIINFOID:0000000005148527
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, when the self-diagnosti cs 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.)
Frequency (Hz) —— X
The value measured by the pulse probe is dis-
played.
DUTY-HI (high) (%)
—— X
DUTY-LOW (low) (%) —— X
PLS WIDTH-HI (ms) —— X
PLS WIDTH-LOW (ms) —— X
Monitored item (Unit)
Monitor Item Selection
Remarks
ECU IN-
PUT SIG- NALS MAIN SIG-
NALS SELEC-
TION
FROM
MENU
DTC work support item DescriptionCheck item
1ST GR FNCTN P0731 Following items for “1GR function ratio” 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 FNCTN P0732
Following items for “2GR function ratio” be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed
or not)
• Self-diagnosis result (OK or NG)
3RD GR FNCTN P0733 Following items for “3GR function ratio” be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed
or not)
• Self-diagnosis result (OK or NG)
4TH GR FNCTN P0734 Following items for “4GR function ratio” be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed
or not)
• Self-diagnosis result (OK or NG)
5TH GR FNCTN P0735 Following items for “5GR function ratio” be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed
or not)
• Self-diagnosis result (OK or NG)
Revision: April 20092010 QX56

Page 3733 of 4210

INFINITI QX56 2010 Factory Service Manual TM-38
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (TCM)
Does A/T CHECK indicator lamp come on for about 2 seconds?
YES >> GO TO 2.
NO >> GO TO TM-121, "
Symptom Table".
2.JUDGMENT PROCEDURE STEP 1
1. Turn

Page 3734 of 4210

INFINITI QX56 2010 Factory Service Manual DIAGNOSIS SYSTEM (TCM)TM-39
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
Erase Self-diagnosis
• In order to make it easier to find the cause of
hard-to-duplicate malfunctions, malfunction

Page 3735 of 4210

INFINITI QX56 2010 Factory Service Manual TM-40
< COMPONENT DIAGNOSIS >
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000005148528
CAN (Controller Area Network) is a serial communication line for real

TM-40
< COMPONENT DIAGNOSIS >
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000005148528
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicle, 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 line) 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:0000000005148529
• This is an OBD-III self-diagnostic item.
• Diagnostic trouble code “U1000 CAN COMM CIRCUIT” wi th CONSULT-III is detected when TCM cannot
communicate to other control units.
Possible CauseINFOID:0000000005148530
Harness or connectors
(CAN communication line is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000005148531
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 proc edure 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-40, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000005148532
1.CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-III
1. Turn ignition switch “ON” and start engine.
2. Select “SELF-DIAG RESULTS” mode fo r “TRANSMISSION” with CONSULT-III.
Is any malfunction of the
“U1000” indicated?
YES >> Go to LAN section. Refer to LAN-14, "Trouble Diagnosis Flow Chart".
NO >> INSPECTION END
Revision: April 20092010 QX56

Page 3736 of 4210

INFINITI QX56 2010 Factory Service Manual P0615 STARTER RELAYTM-41
< COMPONENT DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
P0615 STARTER RELAY
DescriptionINFOID:0000000005148533
TCM prohibits cranking other than at “P” or “N” position

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