ECU INFINITI QX56 2011 Factory Service Manual

ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)BRC-51
< ECU DIAGNOSIS INFORMATION > [WITH VDC]
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*: Models with 4WD system
DTC IndexINFOID:0000000006222583
3  C1118 4WD SYSTEM
*
 C1130 ENGINE SIGNAL 1
 C1144 ST ANG SEN SIGNAL
4  C1109 BATTERY VOLTAGE [ABNORMAL]
 C 1111 P U M P M O T O R
C1140 ACTUATOR RLY
5  C1101 RR RH SENSOR-1
 C1102 RR LH SENSOR-1
 C1103 FR RH SENSOR-1
 C1104 FR LH SENSOR-1
 C1105 RR RH SENSOR-2
 C1106 RR LH SENSOR-2
 C1107 FR RH SENSOR-2
 C1108 FR LH SENSOR-2
 C1115 ABS SENSOR [ABNORMAL SIGNAL]
 C1116 STOP LAMP SW
 C1120 FR LH IN ABS SOL
 C1121 FR LH OUT ABS SOL
 C1122 FR RH IN ABS SOL
 C1123 FR RH OUT ABS SOL
 C1124 RRLH IN ABS SOL
 C1125 RR LH OUT ABS SOL
 C1126 RR RH IN ABS SOL
 C1127 RR RH OUT ABS SOL
 C1142 PRESS SEN CIRCUIT
 C1143 ST ANG SEN CIRCUIT
 C1145 YAW RATE SENSOR
 C1146 SIDE G-SEN CIRCUIT
 C1160 DECEL G SEN SET
C1164 CV 1
C1165 CV 2
 C1166 SV 1
 C1167 SV 2
6  C1155 BR FLUID LEVEL LOW
 C118E ACCUMULATOR PRESS
Priority Detected item (DTC)
DTC Items (CONSULT screen terms) Reference
C1101 RR RH SENSOR-1
BRC-68, "
DTC Logic"C1102 RR LH SENSOR-1
C1103 FR RH SENSOR-1
C1104 FR LH SENSOR-1
C1105 RR RH SENSOR-2BRC-70, "
DTC Logic"C1106 RR LH SENSOR-2
C1107 FR RH SENSOR-2
C1108 FR LH SENSOR-2
C1109 BATTERY VOLTAGE [ABNORMAL]BRC-72, "
DTC Logic"
C 1111 P U M P M O T O RBRC-75, "DTC Logic"
C1115 ABS SENSOR [ABNORMAL SIGNAL] BRC-77, "DTC Logic"
C1116 STOP LAMP SWBRC-79, "DTC Logic"
C 111 8*4WD SYSTEMBRC-87, "DTC Logic"
C1120 FR LH IN ABS SOL BRC-88, "DTC Logic"
Revision: 2010 May2011 QX56

BRC-52
< ECU DIAGNOSIS INFORMATION >[WITH VDC]
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
*: Models with 4WD system
C1121 FR LH OUT ABS SOL
BRC-90, "DTC Logic"
C1122 FR RH IN ABS SOLBRC-88, "DTC Logic"
C1123 FR RH OUT ABS SOLBRC-90, "DTC Logic"
C1124 RRLH IN ABS SOLBRC-88, "DTC Logic"
C1125 RR LH OUT ABS SOLBRC-90, "DTC Logic"
C1126 RR RH IN ABS SOLBRC-88, "DTC Logic"
C1127 RR RH OUT ABS SOLBRC-90, "DTC Logic"
C1130 ENGINE SIGNAL 1BRC-92, "DTC Logic"
C1140 ACTUATOR RLYBRC-93, "DTC Logic"
C1142 PRESS SEN CIRCUITBRC-95, "DTC Logic"
C1143 ST ANG SEN CIRCUITBRC-97, "DTC Logic"
C1144 ST ANG SEN SIGNALBRC-99, "DTC Logic"
C1145 YAW RATE SENSOR
BRC-100, "DTC Logic"C1146 SIDE G-SEN CIRCUIT
C1155 BR FLUID LEVEL LOWBRC-103, "
DTC Logic"
C1160 DECEL G SEN SETBRC-105, "DTC Logic"
C1164 CV 1
BRC-106, "DTC Logic"C1165 CV 2
C1166 SV 1BRC-108, "
DTC Logic"C1167 SV 2
C1170 VARIANT CODING BRC-110, "
DTC Logic"
C118E ACCUMULATOR PRESS BRC-111, "DTC Logic"
U1000 CAN COMM CIRCUITBRC-112, "DTC Logic"
DTC Items (CONSULT screen terms) Reference
Revision: 2010 May2011 QX56

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
BRC-65
< BASIC INSPECTION > [WITH VDC]
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2. Select “ABS”, “DATA MONITOR”, “ECU INPUT SIGNAL S” and “STR ANGLE SIG” in the order. Check that
the signal is within the specified value.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 1.
4.ERASE SELF-DIAGNOSIS MEMORY
With CONSULT-III.
Erase Self-diagnosis result of “ABS”.
Are the memories erased?
YES >> INSPECTION END
NO >> Check the items indica ted by the self-diagnosis.
STR ANGLE SIG : 0
±2.5 °
Revision: 2010 May2011 QX56

CALIBRATION OF DECEL G SENSORBRC-67
< BASIC INSPECTION > [WITH VDC]
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>> GO TO 3.
3.CHECK DATA MONITOR
With CONSULT-III.
1. Drive the vehicle. Steer the steering wheel to t he straight-ahead position. Stop the vehicle on level sur-
face.
2. Select “ABS”, “DATA MONITOR”, “ECU INPUT SIGNAL S” and “DECEL G-SENSOR” in this order. Check
that the signal is within the specified value.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 1.
4.ERASE SELF-DIAGNOSIS MEMORY
With CONSULT-III.
Erase Self-diagnosis result of “ABS”.
Are the memories erased?
YES >> INSPECTION END
NO >> Check the items indica ted by the self-diagnosis.
DECEL G-SENSOR : Approx. 0 G
Revision: 2010 May2011 QX56

BRM-1
BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY
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CONTENTS
BODY REPAIR
VEHICLE INFORMATION ... ..........................2
BODY EXTERIOR PAINT COLOR ................ .....2
Body Exterior Paint Color ................................. ......2
PRECAUTION ...............................................4
REPAIRING HIGH STRENGTH STEEL ......... .....4
High Strength Steel (HSS) ................................ ......4
Handling of Ultra High Strength Steel Plate Parts ......6
PREPARATION ............................................7
REPAIRING MATERIAL ................................ .....7
Foam Repair ....................................................... ......7
BODY COMPONENT PARTS .............................9
Underbody Component Parts ............................ ......9
Body Component Parts ...........................................11
Frame Component Parts .........................................13
REMOVAL AND INSTALLATION ...............15
CORROSION PROTECTION ......................... ....15
Description .......................................................... ....15
Anti-corrosive Wax ..................................................15
Undercoating ...........................................................16
Stone Guard Coat ...................................................17
Body Sealing ...........................................................18
BODY CONSTRUCTION ....................................22
Body Construction ............................................... ....22
REPLACEMENT OPERATIONS .......................24
Description ...............................................................24
Radiator Core Support .............................................26
Hoodledge ...............................................................26
Hoodledge (Partial Replacement) ...........................27
Front Pillar ...............................................................29
Center Pillar .............................................................32
Outer Sill .................................................................35
Rear Fender ............................................................39
Rear Fender Extension ............................................42
Rear Panel and Rear End Crossmember ................42
Rear Floor Rear .....................................................45
Crush Horn ..............................................................46
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .............................................
48
BODY ALIGNMENT ..........................................48
Body Center Marks ............................................ ....48
Description ...............................................................48
Engine Compartment ..............................................49
Underbody ...............................................................52
Passenger Compartment .........................................54
Rear Body ...............................................................56
LOCATION OF PLASTIC PARTS ....................58
Precautions for Plastics ...........................................58
Location of Plastic Parts ..........................................59
Revision: 2010 May2011 QX56

CCS-1
CRUISE CONTROL & DRIVER ASSISTANCE
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SECTION CCS
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CONTENTS
CRUISE CONTROL SYSTEM
ICC
PRECAUTION ................ ...............................
6
PRECAUTIONS .............................................. .....6
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
6
Precautions For Harness Repair ...............................6
ICC System Service ..................................................7
PREPARATION ............................................8
PREPARATION .............................................. .....8
Special Service Tools .......................................... ......8
SYSTEM DESCRIPTION ..............................9
COMPONENT PARTS ................................... .....9
Component Parts Location .................................. ......9
Component Description ...........................................10
SYSTEM .............................................................12
System Description ............................................. ....12
Fail-safe (ADAS Control Unit) .................................15
Fail-safe (ICC Sensor) ............................................15
VEHICLE-TO-VEHICLE DISTANCE CONTROL
MODE FUNCTION ................................................. ....
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VEHICLE-TO-VEHICLE DISTANCE CONTROL
MODE FUNCTION : System Description ................
15
CONVENTIONAL (FIXED SPEED) CRUISE CON-
TROL MODE FUNCTION ...................................... ....
18
CONVENTIONAL (FIXED SPEED) CRUISE
CONTROL MODE FUNCTION : System Descrip-
tion ...................................................................... ....
18
OPERATION .......................................................21
VEHICLE-TO-VEHICLE DISTANCE CONTROL
MODE FUNCTION ................................................. ....
21
VEHICLE-TO-VEHICLE DISTANCE CONTROL
MODE FUNCTION : Switch Name and Function ....
21
VEHICLE-TO-VEHICLE DISTANCE CONTROL
MODE FUNCTION : Menu Displayed by Pressing
Each Switch .............................................................
21
CONVENTIONAL (FIXED SPEED) CRUISE CON-
TROL MODE FUNCTION ...................................... ....
25
CONVENTIONAL (FIXED SPEED) CRUISE
CONTROL MODE FUNCTION : Switch Name and
Function ...................................................................
25
CONVENTIONAL (FIXED SPEED) CRUISE
CONTROL MODE FUNCTION : Menu Displayed
by Pressing Each Switch .........................................
25
HANDLING PRECAUTION ...............................27
Precautions for Vehicle- to-Vehicle Distance Con-
trol Mode .............................................................. ....
27
Precautions for Conventional (Fixed Speed)
Cruise Control Mode ................................................
29
DIAGNOSIS SYSTEM (ADAS CONTROL
UNIT) .................................................................
30
On Board Diagnosis Function ..................................30
CONSULT-III Function (ICC/ADAS) ........................31
DIAGNOSIS SYSTEM (ICC SENSOR) .............41
CONSULT-III Function (LASER) .............................41
ECU DIAGNOSIS INFORMATION ..............43
ADAS CONTROL UNIT ....................................43
Reference Value .................................................. ....43
Fail-safe ...................................................................48
DTC Inspection Priority Chart ..................................49
DTC Index ...............................................................50
ICC SENSOR ....................................................54
Reference Value ......................................................54
Fail-safe ...................................................................55
DTC Inspection Priority Chart ..................................55
DTC Index ...............................................................55
Revision: 2010 May2011 QX56

CCS
DIAGNOSIS SYSTEM (ADAS CONTROL UNIT)
CCS-31
< SYSTEM DESCRIPTION > [ICC]
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 It displays for up to 5 minutes and then stops.
 If multiple malfunctions exist, up to 6 DTCs can be stored in memory at the most, and the most recent
one is displayed first.
WHEN THE ON BOARD SELF-DIAGNOSIS DOES NOT START
If the on board self-diagnosis does not start, check the following items.
HOW TO ERASE ON BOARD SELF-DIAGNOSIS
1. Turn the ignition switch OFF.
2. Start the engine, and then start the on board self-diagnosis.
3. Press the CANCEL switch 5 times, and then press the DIS-
TANCE switch 5 times under the condition that the on board
self-diagnosis starts.
NOTE:
 Complete the operation within 10 seconds after pressing the
CANCEL switch first.
 If the operation is not completed within 10 seconds, repeat the procedure from step 1.
4. DTC 55 is displayed after erasing. NOTE:
DTCs for existing malfunction can not be erased.
5. Turn ignition switch OFF, and finish the diagnosis.
CONSULT-III Function (ICC/ADAS)INFOID:0000000006227984
APPLICATION ITEMS
CONSULT-III performs the following functions via CAN communication using ADAS control unit.
WORK SUPPORT
Assumed abnormal part Inspection item
Information display Combination meter malfunction Check that the self-diagnosis function of the combina-
tion meter operates. Refer to
MWI-29, "
On Board Diag-
nosis Function"
ICC steering switch malfunction
Perform the inspection for DTC“C1A06”. Refer to CCS-
94, "Diagnosis Procedure"Harness malfunction between ICC steering switch and ECM
ECM malfunction
ADAS control unit malfunction  Check power supply and ground circuit of ADAS con-
trol unit. Refer to DAS-62, "
Diagnosis Procedure".
 Perform SELF-DIAGNOSIS for “ICC/ADAS”with
CONSULT-III, and then check the malfunctioning
parts. Refer to DAS-38, "
DTC Index".
PKIB8373E
Diagnosis mode Description
Work Support Displays causes of automatic system cancellation occurred during system control
Self Diagnostic Result Displays the name of a malfunctioning system stored in the ADAS control unit
Data Monitor Displays ADAS control unit input/output data in real time
Active Test Enables an operational check of a load by transmitting a driving signal from the ADAS control unit to
the load
Ecu Identification Displays ADAS control unit part number
CAN Diag Support Monitor Displays a reception/transmission state of CAN communication and ITS communication
Revision: 2010 May2011 QX56

CCS
DIAGNOSIS SYSTEM (ICC SENSOR)CCS-41
< SYSTEM DESCRIPTION > [ICC]
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DIAGNOSIS SYSTEM (ICC SENSOR)
CONSULT-III Function (LASER)INFOID:0000000006224280
APPLICATION ITEMS
CONSULT-III performs the following functions via CAN communication with ADAS control unit and the com-
munication with ICC sensor.
WORK SUPPORT
Laser Beam Adjust
Refer to CCS-72, "Description".
SELF DIAGNOSTIC RESULT
Refer to CCS-55, "DTC Index".
DATA MONITOR
Diagnosis mode Description
Work Support It can monitor the adjustment direction indication in order to perform the laser beam aiming operation
smoothly
Self Diagnostic Result Displays malfunctioning system memorized in ICC sensor
Data Monitor Displays real-time input/output data of ICC sensor
Ecu Identification Displays ICC sensor part number
CAN Diag Support Monitor The results of transmit/receive diagnosis of ITS communication can be read
Work support items Description
LASER BEAM ADJUST Outputs laser beam, calculates dislocation of the beam, and indicates adjustment direction
Monitored item
[Unit] Description
VHCL SPEED SE
[km/h] or [mph] Vehicle speed judged from a vehicle speed signal read by the ICC sensor via ITS communica-
tion is displayed [ADAS control unit receives a vehicle speed signal from ABS actuator and
electric unit (control unit) via CAN communication and transmits the calculated vehicle speed
to ICC sensor via ITS communication]
YAW R AT E
[deg/s] Indicates yaw rate read from ADAS control unit through ITS communication (ADAS control unit
receives yaw rate signal from ABS actuator and electric unit (control unit) via CAN communi-
cation and transmits yaw rate calculated by the ADAS control unit)
Yaw rate judged from a yaw rate signal read by ICC sensor via ITS communication is displayed
[ADAS control unit receives a yaw
rate signal from ABS actuator and electric unit (control unit)
via CAN communication and transmits the calculated yaw rate to ICC sensor via ITS commu-
nication]
PWR SUP MONI
[V] Indicates IGN voltage input by ICC sensor
DISTANCE
[m] Indicates the distance from the vehicle ahead
RELATIVE SPD
[m/s] Indicates the relative speed of the vehicle ahead
LASER OFFSET
[m] NOTE:
The item is indicated, but not used
LASER HEIGHT
[m] NOTE:
The item is indicated, but not used
STEERING ANGLE
[deg] The steering angle is displayed
STRG ANGLE SPEED
[deg/s] The steering angle speed is displayed
Revision: 2010 May2011 QX56

CCS
ADAS CONTROL UNITCCS-43
< ECU DIAGNOSIS INFORMATION > [ICC]
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ECU DIAGNOSIS INFORMATION
ADAS CONTROL UNIT
Reference ValueINFOID:0000000006227985
VALUES ON THE DIAGNOSIS TOOL
Monitor item Condition Value/Status
MAIN SW Ignition switch ON When MAIN switch is pressed On
When MAIN switch is not pressed Off
SET/COAST SW Ignition switch ON When SET/COAST switch is pressed On
When SET/COAST switch is not pressed Off
CANCEL SW Ignition switch ON When CANCEL switch is pressed On
When CANCEL switch is not pressed Off
RESUME/ACC SW Ignition switch ON When RESUME/ACCELERATE
switch is pressed On
When RESUME/ACCELERATE switch is not pressed Off
DISTANCE SW Ignition switch ON When DISTANCE swit
ch is pressed On
When DISTANCE switch is not pressed Off
CRUISE OPE Drive the vehicle and activate
the vehicle-to-vehicle distance
control mode When ICC system is controlling On
When ICC system is not controlling Off
BRAKE SW Ignition switch ON When brake pedal is depressed Off
When brake pedal is not depressed On
STOP LAMP SW Ignition switch ON When brake pedal is depressed On
When brake pedal is not depressed Off
IDLE SW Engine running Idling On
Except idling (depress accelerator pedal) Off
SET DISTANCE  Start the engine and turn the
ICC system ON
 Press the DISTANCE switch to change the vehi-
cle-to-vehicle distance set-
ting When set to “long” Long
When set to “middle” Mid
When set to “short” Short
CRUISE LAMP Start the engine and press
MAIN switch ICC system ON
(MAIN switch indicator ON)
On
ICC system OFF
(MAIN switch indicator OFF) Off
OWN VHCL Start the engine and press
MAIN switch ICC system ON
(Own vehicle indicator ON)
On
ICC system OFF
(Own vehicle indicator OFF) Off
VHCL AHEAD Drive the vehicle and activate
the vehicle-to-vehicle distance
control mode When a vehicle ahead is detected (vehicle ahead de-
tection indicator ON)
On
When a vehicle ahead is not detected (vehicle ahead
detection indicator OFF) Off
ICC WARNING Start the engine and press
MAIN switch When ICC system is malfunctioning
(ICC system warning lamp ON)
On
When ICC system is normal
(ICC system warning lamp OFF) Off
Revision: 2010 May2011 QX56

CCS-44
< ECU DIAGNOSIS INFORMATION >[ICC]
ADAS CONTROL UNIT
VHCL SPEED SE While driving Displays the ve-
hicle speed cal-
culated by
ADAS control unit
SET VHCL SPD While driving When vehicle speed is set Displays the set
vehicle speed
BUZZER O/P Engine running When the buzzer of the following system operates
 Vehicle-to-vehicle distance control mode
 DCA system
 FCW system
 IBA system
On
When the buzzer of the following system not operates
 Vehicle-to-vehicle distance control mode
 DCA system
 FCW system
 IBA system Off
THRTL SENSOR NOTE:
The item is indicated, but not monitored
0.0
ENGINE RPM Engine running Equivalent to ta-
chometer read- ing
WIPER SW Ignition switch ON Wiper not operating Off
Wiper LO operation Low
Wiper HI operation High
YAW R AT E NOTE:
The item is indicated, but not monitored
0.0
BA WARNING Engine running IBA OFF indicator lamp ON
 When IBA system is malfunctioning
 When IBA system is turned to OFF
On
IBA OFF indicator lamp OFF
 When IBA system is normal
 When IBA system is turned to ON Off
STP LMP DRIVE Drive the vehicle and activate
the vehicle-to-vehicle distance
control mode When ICC brake hold relay is activated On
When ICC brake hold relay is not activated Off
D RANGE SW Engine running When the selector lever is in “D” position or manual
mode
On
When the selector lever is in any position other than “D”
or manual mode Off
NP RANGE SW Engine running When the selector lever is
in “N”, “P” position On
When the selector lever is in any position other than “N”,
“P” Off
PKB SW Ignition switch ON When the parking brake is applied On
When the parking brake is released Off
PWR SUP MONI Engine running Power supply
voltage value of ADAS control unit
VHCL SPD AT While driving Va l u e o f A / T v e -
hicle speed sen- sor signal
THRTL OPENING Engine running Depress accelerator pedal Displays the
throttle position
Monitor item Condition Value/Status
Revision: 2010 May2011 QX56