2011 INFINITI QX56 transmission

SYSTEMMIR-9
< SYSTEM DESCRIPTION >
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MIR
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 Changeover switch: Select either left or right
 A/T shift selector: R position
NOTE:
During the reverse interlock door mirror system, if all of the above conditions are not satisfied, mirror face
returns to original angle.
AUTO ANTI-DAZZLING INSIDE MIRROR SYSTEM
AUTO ANTI-DAZZLING INSIDE MIRRO R SYSTEM : System DescriptionINFOID:0000000006257224
The sensor built in inside mirror detects the bri ghtness of headlight of the vehicle behind and automatically
changes the light transmission to decrease the brightness.
Revision: 2010 May2011 QX56

MWI
U1000 CAN COMM CIRCUITMWI-59
< DTC/CIRCUIT DIAGNOSIS >
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DTC/CIRCUIT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000006221728
CAN (Controller Area Network) is a serial communication system for real time application. It is an on-vehicle
multiplex communication system with high data communi cation speed and excellent error detectability. Many
electronic control units are equipped onto vehicles, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with
less wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to LAN-28, "
CAN COMMUNICATION SYSTEM : CAN Communica-
tion Signal Chart".
DTC LogicINFOID:0000000006221729
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000006221730
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check “Self Diagnostic Result” of “METER/M&A”.
Is
“CAN COMM CIRCUIT” displayed?
YES >> Refer to LAN-18, "Trouble Diagnosis Flow Chart".
NO >> Refer to GI-40, "
Intermittent Incident".
DTCDisplay contents of
CONSULT-III Diagnostic item is detected when... Probable malfunction location
U1000 CAN COMM CIRCUIT When combination meter is not transmitting or
receiving CAN communication signal for 2
seconds or more.
CAN communication system
Revision: 2010 May2011 QX56

PCS
SYSTEMPCS-9
< SYSTEM DESCRIPTION > [IPDM E/R]
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POWER CONSUMPTION CONTRO
L SYSTEM : System DiagramINFOID:0000000006220168
POWER CONSUMPTION CONTROL SYSTEM : System DescriptionINFOID:0000000006220169
OUTLINE
 IPDM E/R incorporates a power consumption control function that reduces the power consumption accord-
ing to the vehicle status.
 IPDM E/R changes its status (control mode) with the sleep wake up signal received from BCM via CAN com- munication.
Normal mode (wake-up)- CAN communication is normally performed with other control units.
- Individual unit control by IPDM E/R is normally performed.
Low power consumption mode (sleep)- Low power consumption control is active.
- CAN transmission is stopped.
SLEEP MODE ACTIVATION
 IPDM E/R judges that the sleep-ready conditions are fu lfilled when the ignition switch is OFF and none of the
conditions below are present. Then it transmits a sleep-ready signal (ready) to BCM via CAN communica-
tion.
- Outputting signals to actuators
- Switches or relays operating
- Output requests are being received from control units via CAN communication.
 IPDM E/R stops CAN communication and enters the low power consumption mode when it receives a sleep
wake up signal (sleep) from BCM and the sleep-ready conditions are fulfilled.
WAKE-UP OPERATION
 IPDM E/R changes from the low power consumption mode to the normal mode when it receives a sleep
wake-up signal (wake up) from BCM or any of the followi ng conditions is fulfilled. In addition, it transmits a
sleep-ready signal (not-ready) to BCM via CAN communication to report the CAN communication start.
- Ignition switch ON
- An output request is received from a control unit via CAN communication.
JMMIA0382GB
Revision: 2010 May2011 QX56

PCS-28
< DTC/CIRCUIT DIAGNOSIS >[IPDM E/R]
U1000 CAN COMM CIRCUIT
DTC/CIRCUIT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000006220176
CAN (Controller Area Network) is a serial communication
line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H line, CAN-L line) al lowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to LAN-28, "
CAN COMMUNICATION SYSTEM : CAN Communica-
tion Signal Chart".
DTC LogicINFOID:0000000006220177
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000006220178
1.PERFORM SELF DIAGNOSTIC
1. Turn the ignition switch ON and wait for 2 seconds or more.
2. Check “Self Diagnostic Result” of IPDM E/R.
Is DTC
“U1000” displayed?
YES >> Refer to LAN-18, "Trouble Diagnosis Flow Chart".
NO >> Refer to GI-40, "
Intermittent Incident".
DTCCONSULT-III display
description DTC Detection Condit
ion Possible cause
U1000 CAN COMM CIRCUIT When IPDM E/R cannot communicate CAN communi-
cation signal continuously for 2 seconds or more CAN communication system
Revision: 2010 May2011 QX56

PCS
COMPONENT PARTSPCS-35
< SYSTEM DESCRIPTION > [POWER DISTRIBUTION SYSTEM]
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SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000006220189
Component DescriptionINFOID:0000000006220190
BCMINFOID:0000000006220191
BCM controls the various electrical components and
simultaneously supplies power according to the power
supply position.
BCM checks the power supply position internally.
Ignition RelayINFOID:0000000006220192
BCM turns ON the following relays to supply ignition power supply or ignition switch ON signal to each ECU
when the ignition switch is turned ON.
 Ignition relay-1
 Ignition relay (inside IPDM E/R)
 Blower relay
1. BCM
Refer to BCS-4, "
BODY CONTROL
SYSTEM : Component Parts Loca-
tion". 2. Push-button ignition switch 3. IPDM E/R
Refer to PCS-4, "
Component Parts
Location".
4. Stop lamp switch 5. TCM Refer to TM-10, "
A/T CONTROL
SYSTEM : Compon ent Parts Loca-
tion".
JMMIA0384ZZ
BCM Reference
BCM PCS-35
Ignition relay (Built-in IPDM E/R)
PCS-35
Ignition relay-1
Accessory relayPCS-36
Blower relayPCS-36
Push-button ignition switchPCS-36
Stop lamp switchSEC-10
TCM (Transmission range switch)SEC-10
Revision: 2010 May2011 QX56

RAX-1
TRANSMISSION & DRIVELINE
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SECTION RAX
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CONTENTS
REAR AXLE
PRECAUTION ................ ...............................2
PRECAUTIONS .............................................. .....2
Precautions for Drive Shaft ................................. ......2
PREPARATION ............................................3
PREPARATION .............................................. .....3
Special Service Tools .......................................... ......3
Commercial Service Tools ........................................3
SYMPTOM DIAGNOSIS ...............................4
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ........................ .....
4
NVH Troubleshooting Chart ................................ ......4
PERIODIC MAINTENANCE ..........................5
REAR WHEEL HUB AND HOUSING ............ .....5
Inspection ............................................................ ......5
REAR DRIVE SHAFT ..........................................6
Inspection ............................................................ ......6
REMOVAL AND INSTALLATION ................7
REAR WHEEL HUB AND HOUSING ................7
Exploded View ..................................................... .....7
Removal and Installation ..........................................7
Inspection .................................................................9
REAR DRIVE SHAFT ........................................11
Exploded View .........................................................11
Removal and Installation .........................................11
WHEEL SIDE ......................................................... ....12
WHEEL SIDE : Disassembly and Assembly ...........12
FINAL DRIVE SIDE ................................................ ....15
FINAL DRIVE SIDE : Disassembly and Assembly ....15
Inspection ................................................................16
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .............................................
18
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
18
Wheel Hub and Bearing Assembly ...................... ....18
Drive Shaft ...............................................................18
Revision: 2010 May2011 QX56

U1000 CAN COMM CIRCUITSBC-35
< DTC/CIRCUIT DIAGNOSIS >
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U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000006237897
 CAN (Controller Area Network) is a serial communica tion line for real time applications. It is an on board
multiplex communication line with high data communication speed and excellent error detection ability. A
modern vehicle is equipped with many ECMs, and each cont rol unit shares information and links with other
control units during operation (not independent). In CA N communication, two control units are connected
with two communication lines (CAN H-line, CAN L-line) allowing a high rate of information transmission with
less wiring. Each control unit transmits/receive s data but selectively reads required data only.
 It transmits the vehicle status to pre-crash seat belt control unit using the CAN communication system.
 It consists of CAN system (unified meter and A/ C amp., ICC sensor, BCM, steering angle sensor).
 Refer to LAN-27, "
CAN COMMUNICATION SYSTEM : CA N System Specification Chart".
DTC LogicINFOID:0000000006237898
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.SELF-DIAGNOSIS WITH PRE-CRASH SEAT BELT CONTROL UNIT
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check “Self-diagnostic result” with CONSULT-III.
Is any DTC detected?
YES >> Refer to LAN-27, "CAN COMMUNICATION SYSTEM : CA N System Specification Chart".
NO >> CAN communication system is normal.
DTC No. Self-diagnosis item DTC Detection Condition Possible causes
U1000 CAN communication
circuit Pre-crash seat belt control unit cannot transmit and re-
ceive CAN communication system for 2 seconds or
more.  Harness or connectors
(CAN communication line is open
or shorted)
Revision: 2010 May2011 QX56

U1000 CAN COMM CIRCUITSCS-87
< DTC/CIRCUIT DIAGNOSIS > [AIR LEVELIZER CONTROL SYSTEM]
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U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000006256082
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 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 independently ). 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.
DTC LogicINFOID:0000000006256083
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Run engine for at least 2 cons ecutive seconds at idle speed.
3. Perform “Self Diagnostic Results” in “E-SUS”.
Is
“U1000” detected?
YES >> Go to SCS-87, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006256084
Go to LAN-18, "Trouble Diagnosis Flow Chart".
DTC Display itemI Malfunction detected condition Possible cause
U1000 CAN COMM CIRCUIT Air levelizer control module is not transmitting or re-
ceiving CAN communication signal for 2 seconds or
more.  Harness or connectors
(CAN communication line is open or
shorted.)
 Air levelizer control module
Revision: 2010 May2011 QX56