2011 INFINITI QX56 parking brake

TM-268
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
Check torque converter one-way clutch using a check tool as shown
at figure.
1. Insert a check tool into the groove of bearing support built into
one-way clutch outer race.
2. When fixing bearing support with a check tool, rotate one-way clutch spline using a screwdriver.
3. Make sure that inner race rotates clockwise only. If not, replace
torque converter assembly.
1st One-way Clutch
Check operation of 1st one-way clutch.
1. Install 1st one-way clutch (1) to front brake hub (with under drivecarrier).
2. Hold 1st one-way clutch.
3. Check front brake hub for correct locking and unlocking direc- tions. If necessary, replace 1st one-way clutch.
Under Drive Sun Gear
Check for deformation, fatigue or damage. If necessary, replace the under drive sun gear.
Mid Carrier Assembly
Check for deformation, fatigue or damage. If necessary, replace the mid carrier assembly.
Rear Carrier Assembly
Check for deformation, fatigue or damage. If necessary, replace the rear carrier assembly.
Reverse Brake Drive Plates
Check facing for burns, cracks or damage. If necessary, replace the plate.
Reverse Brake Retaining Plate, Driven Plates and Dish Plates
Check facing for burns, cracks or damage. If necessary, replace the plate.
Each Snap Ring
Check for deformation, fatigue or damage. If necessary, replace the snap ring.
Parking Actuator Support and Parking Pawl
SCIA3171E
: Unlocked
: Locked
JSDIA1713ZZ
Revision: 2010 May2011 QX56

WCS
WCS-1
DRIVER INFORMATION & MULTIMEDIA
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SECTION WCS
A
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CONTENTS
WARNING CHIME SYSTEM
PRECAUTION ................ ...............................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
SYSTEM DESCRIPTION ..............................4
COMPONENT PARTS ................................... .....4
Component Parts Location .................................. ......4
Component Description .............................................4
Combination Meter ....................................................5
SYSTEM ..............................................................6
WARNING CHIME SYSTEM .......................................6
WARNING CHIME SYSTEM : System Diagram . ......6
WARNING CHIME SYSTEM : System Description
......
6
WARNING CHIME SYSTEM : Fail-Safe ...................7
LIGHT REMINDER WARNING CHIME ................. ......8
LIGHT REMINDER WARNING CHIME : System
Diagram .....................................................................
8
LIGHT REMINDER WARNING CHIME : System
Description ................................................................
8
FRONT FOG LIGHT REMINDER WARNING
CHIME .................................................................... ......
9
FRONT FOG LIGHT REMINDER WARNING
CHIME : System Diagram .......................................
10
FRONT FOG LIGHT REMINDER WARNING
CHIME : System Description ...................................
10
SEAT BELT WARNING CHIME ............................ ....10
SEAT BELT WARNING CHIME : System Diagram
....
11
SEAT BELT WARNING CHIME : System Descrip-
tion ...................................................................... ....
11
PARKING BRAKE RELEASE WARNING CHIME ....12
PARKING BRAKE RELEASE WARNING CHIME
: System Diagram ................................................ ....
12
PARKING BRAKE RELEASE WARNING CHIME
: System Description ................................................
12
DIAGNOSIS SYSTEM (COMBINATION
METER) .............................................................
14
CONSULT-III Function ............................................14
DIAGNOSIS SYSTEM (BCM) ...........................19
COMMON ITEM ..................................................... ....19
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
19
BUZZER ................................................................. ....20
BUZZER : CONSULT-III Function (BCM - BUZZ-
ER) ..........................................................................
20
ECU DIAGNOSIS INFORMATION ..............22
COMBINATION METER ...................................22
Reference Value .................................................. ....22
Fail-Safe ..................................................................29
DTC Index ...............................................................30
BCM (BODY CONTROL MODULE) .................31
List of ECU Reference .............................................31
WIRING DIAGRAM ......................................32
WARNING CHIME SYSTEM .............................32
Wiring Diagram .................................................... ....32
BASIC INSPECTION ...................................37
DIAGNOSIS AND REPAIR WORKFLOW ........37
Work Flow ............................................................ ....37
DTC/CIRCUIT DIAGNOSIS .........................39
POWER SUPPLY AND GROUND CIRCUIT ....39
COMBINATION METER ........................................ ....39
Revision: 2010 May2011 QX56

WCS-2
COMBINATION METER : Diagnosis Procedure ....39
METER BUZZER CIRCUIT ................................40
Component Function Check ................................ ...40
Diagnosis Procedure .............................................40
SEAT BELT BUCKLE SWITCH SIGNAL CIR-
CUIT ...................................................................
41
Component Function Check .............................. ...41
Diagnosis Procedure .............................................41
Component Inspection ............................................42
PARKING BRAKE SWITCH SIGNAL CIR-
CUIT ...................................................................
43
Diagnosis Procedure ........................................... ...43
Component Inspection ............................................43
SYMPTOM DIAGNOSIS ............................44
THE LIGHT REMINDER WARNING DOES
NOT SOUND ................................................... ...
44
Description ........................................................... ...44
Diagnosis Procedure ...............................................44
THE SEAT BELT WARNING CONTINUES
SOUNDING, OR DOES NOT SOUND ...............
45
Description ........................................................... ...45
Diagnosis Procedure ...............................................45
THE PARKING BRAKE RELEASE WARNING
CONTINUES SOUNDING, OR DOES NOT
SOUND ..............................................................
46
Description ........................................................... ...46
Diagnosis Procedure ...............................................46
Revision: 2010 May2011 QX56

WCS-4
< SYSTEM DESCRIPTION >
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000006222537
Component DescriptionINFOID:0000000006222682
1. Parking brake switch 2. ABS actuator and electric unit (con-
trol unit)
Refer to BRC-10, "
Component Parts
Location". 3. BCM
Refer to BCS-4, "
BODY CONTROL
SYSTEM : Component Parts Loca-
tion".
4. Combination meter 5. Seat belt buckle switch (driver side)
JSNIA3313ZZ
Unit Description
Combination meter  Receives a buzzer output signal from the BCM with CAN communication line and sounds the
buzzer.
 Judges whether the parking brake is released from the vehicle speed signal received from the ABS actuator and electric unit (control unit) with CAN commun ication line and the parking
brake switch signal from the parking brake switch, and sounds the buzzer if necessary.
BCM Based on the signals received from various units and switches, transmits the buzzer output sig-
nal to the combination meter via CAN communication.
ABS actuator and electric unit
(control unit) Transmits the vehicle speed signal to the combination meter via CAN communication.
Parking brake switch Transmits the parking brake switch signal to the combination meter.
Seat belt buckle switch (driver
side) Transmits the seat belt buckle switch signal (driver side) to the combination meter.
Revision: 2010 May2011 QX56

WCS
SYSTEMWCS-7
< SYSTEM DESCRIPTION >
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WARNING CHIME SYSTEM : Fail-SafeINFOID:0000000006369726
FA I L - S A F E
The combination meter activates the fail-safe contro l if CAN communication with each unit is malfunctioning.
Seat belt warning chimeThe warning chime sounds when the driver
seat belt is unfastened with the ignition switch
in ON position. BCMWCS-11,
"SEAT BELT
WARNING
CHIME : Sys-
tem Descrip-
tion"
Parking brake release warning chime
The warning chime sounds when the ignition
switch is in ON position with the parking brake
in operation and the vehicle speed 7 km/h (4.3
MPH) or more. Combination meterWCS-12,
"PA R K I N G
BRAKE RE-
LEASE WARN-
ING CHIME :
System De-
scription"
Warning functions Out line Warning judgment unit Refer to
Function Specifications
Speedometer
Reset to zero by suspending communication.
Tachometer
Engine coolant temperature gauge
Engine oil pressure gauge
Illumination control When suspending communication, changes to nighttime mode.
Information display Odo/trip meter An indicated value is maintained at communications blackout.
Shift position indicator The display turns OFF by suspending communication.
Door open warning The display turns OFF by suspending communication.
Buzzer The buzzer turns OFF by suspending communication.
Revision: 2010 May2011 QX56

WCS-12
< SYSTEM DESCRIPTION >
SYSTEM
TIMING CHART
SOUND SPECIFICATION
PARKING BRAKE RELEASE WARNING CHIME
PARKING BRAKE RELEASE WARNING CHIME : System DiagramINFOID:0000000006222547
PARKING BRAKE RELEASE WARNING CHIME : System DescriptionINFOID:0000000006222548
WARNING OPERATION CONDITIONS
If all of the following conditions are fulfilled.
WARNING CANCEL CONDITIONS
Warning is canceled if any of the following conditions are fulfilled.
JSNIA3123GB
J S N I A 3 111 G B
JSNIA2422GB
Operation conditions
Ignition switch ON
Parking brake During the operation (parking brake switch ON)
Vehicle speed Approximately 7 km/h (4.3 MPH) or more
Revision: 2010 May2011 QX56

WCS
SYSTEMWCS-13
< SYSTEM DESCRIPTION >
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Combination meter sounds integrated buzzer when it judges that parking brake release warning chime is nec-
essary from signals below.
TIMING CHART
SOUND SPECIFICATION
Operation conditions
Ignition switch OFF
Parking brake Release condition (parking brake switch OFF)
Vehicle speed Approximately 3 km/h (1.9 MPH) or less
Signal name Signal path
Ignition switch signal —
Parking brake switch signal Parking brake switch Combination meter
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
JSNIA2428GB
JSNIA3139GB
Revision: 2010 May2011 QX56

WCS-14
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (COMBINATION METER)
DIAGNOSIS SYSTEM (COMBINATION METER)
CONSULT-III FunctionINFOID:0000000006222742
CONSULT-III APPLICATION ITEMS
CONSULT-III can perform the following diagnosis modes via CAN communication and the combination meter.
SELF DIAG RESULT
Refer to MWI-43, "DTC Index".
DATA MONITOR
Display Item List
X: Applicable
System Diagnosis mode Description
METER/M&A Self Diagnostic Result The combination meter checks the conditions and displays memorized errors.
Data Monitor Displays the combination meter input/output data in real time.
Special function Lighting history of the warning lamp and indicator lamp can be checked.
Display item [Unit]
MAIN
SIGNALS Description
SPEED METER
[km/h] XValue of vehicle speed
signal received from ABS actuator and el ectric unit (control
unit) via CAN communication.
NOTE:
655.35 is displayed when the malfunction signal is received.
SPEED OUTPUT
[km/h] XVehicle speed signal value transmitted to other units via CAN communication.
NOTE:
655.35 is displayed when the malfunction signal is received.
ODO OUTPUT
[km/h or mph] Odometer signal value transmitted to other units via CAN communication.
TACHO METER
[rpm] XValue of the engine speed signal received from ECM via CAN communication.
NOTE:
8191.875 is displayed when the malfunction signal is received.
FUEL METER
[L] X Fuel level indicated on combination meter.
W TEMP METER
[ ° C] XValue of engine coolant temperature signal is received from ECM via CAN com-
munication.
NOTE:
215 is displayed when the malfunction signal is input.
ABS W/L
[On/Off] Status of ABS warning lamp
detected from ABS warning lamp signal is received
from ABS actuator and electric unit (control unit) via CAN communication.
VDC/TCS IND
[On/Off] Status of VDC OFF indicator lamp detected from VDC OFF indicator lamp signal
is received from ABS actuator and electric
unit (control unit) via CAN communica-
tion.
SLIP IND
[On/Off] Status of VDC warning lamp detected from VDC warning lamp signal received
from ABS actuator and electric unit (control unit) via CAN communication.
BRAKE W/L
[On/Off] Status of brake warning lamp detected from brake warning lamp signal is received
from ABS actuator and electric unit (control unit) via CAN communication.
NOTE:
Displays “Off” if the brake warning lamp is illuminated when the valve check starts,
the parking brake switch is turned ON or the brake fluid level switch is turned ON.
DOOR W/L
[On/Off] Status of door open warning detected from door switch signal received from BCM
via CAN communication.
HI-BEAM IND
[On/Off] Status of high beam indicator lamp detected from high beam request signal is re-
ceived from BCM via CAN communication.
TURN IND
[On/Off] Status of turn indicator lamp detected from turn indicator signal is received from
BCM via CAN communication.
Revision: 2010 May2011 QX56