2011 INFINITI QX56 brake sensor

CHG-4
< PRECAUTION >
PRECAUTIONS
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button igniti on switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
Precaution for Power Generation Vo ltage Variable Control SystemINFOID:0000000006274856
CAUTION:
For this model, the battery current sensor that is in stalled to the battery cable at the negative terminal
measures the charging/discharging curre nt of the battery, and performs various controls. If the electri-
cal component or the ground wire is connected direct ly to the battery terminal, the current other than
that being measured with the battery current sensor is charging to or discharging from the battery.
This condition causes the malfunction of the control, and then the battery discharge may occur. Do
not connect the electrical compon ent or the ground wire directly to the battery terminal.
Revision: 2010 May2011 QX56

DAS-2
Fail-safe (ADAS Control Unit) .................................72
Fail-safe (ICC Sensor) ............................................72
OPERATION ......................................................73
Switch Name and Function .................................. ...73
Menu Displayed by Pressing Each Switch .............73
HANDLING PRECAUTION ................................76
Precautions for Distance Control Assist .............. ...76
DIAGNOSIS SYSTEM (ADAS CONTROL
UNIT) ............................................................... ...
78
On Board Diagnosis Function .............................. ...78
CONSULT-III Function (ICC/ADAS) .......................79
DIAGNOSIS SYSTEM (ICC SENSOR) ..............89
CONSULT-III Function (LASER) ............................89
DIAGNOSIS SYSTEM (ACCELERATOR
PEDAL ACTUATOR) ...................................... ...
91
CONSULT-III Function (ACCELERATOR PEDAL
ACT) .................................................................... ...
91
ECU DIAGNOSIS INFORMATION ..............93
ADAS CONTROL UNIT .................................. ...93
Reference Value .................................................. ...93
Fail-safe ..................................................................98
DTC Inspection Priority Chart .................................99
DTC Index .............................................................100
ICC SENSOR ...................................................104
Reference Value .................................................. ..104
Fail-safe .................................................................105
DTC Inspection Priority Chart ................................105
DTC Index .............................................................105
ACCELERATOR PEDAL ACTUATOR ...........107
Reference Value .................................................. ..107
DTC Inspection Priority Chart ................................108
DTC Index .............................................................108
WIRING DIAGRAM ....................................109
DRIVER ASSISTANCE SYSTEMS ................ .109
Wiring Diagram .................................................... ..109
BASIC INSPECTION ..................................124
DIAGNOSIS AND REPAIR WORK FLOW ..... .124
Work Flow ............................................................ ..124
ADDITIONAL SERVICE WHEN REPLACING
ICC SENSOR ...................................................
126
Description ........................................................... ..126
Work Procedure .....................................................126
ADDITIONAL SERVICE WHEN REPLACING
ACCELERATOR PEDAL ASSEMBLY ............
127
Description ........................................................... ..127
Work Procedure .....................................................127
ACTION TEST ..................................................128
Description ........................................................... .128
Work Procedure ....................................................128
DTC/CIRCUIT DIAGNOSIS .......................129
C1A00 CONTROL UNIT ................................. ..129
DTC Logic ............................................................ .129
Diagnosis Procedure .............................................129
C1A01 POWER SUPPLY CIRCUIT 1, C1A02
POWER SUPPLY CIRCUIT 2 ...........................
130
DTC Logic ............................................................ .130
Diagnosis Procedure .............................................130
C1A03 VEHICLE SPEED SENSOR .................131
DTC Logic ............................................................ .131
Diagnosis Procedure .............................................131
C1A04 ABS/TCS/VDC SYSTEM ......................133
DTC Logic ............................................................ .133
Diagnosis Procedure .............................................133
C1A05 BRAKE SW/STOP LAMP SW ..............134
DTC Logic ............................................................ .134
Diagnosis Procedure .............................................134
Component Inspection (ICC Brake Switch) ..........137
Component Inspection (Stop Lamp Switch) ..........137
C1A06 OPERATION SW ..................................138
DTC Logic ............................................................ .138
Diagnosis Procedure .............................................138
Component Inspection ..........................................139
C1A12 LASER BEAM OFF CENTER ..............140
DTC Logic ............................................................ .140
Diagnosis Procedure .............................................140
C1A13 STOP LAMP RELAY ............................141
DTC Logic ............................................................ .141
Diagnosis Procedure .............................................141
Component Inspection ..........................................146
C1A14 ECM ......................................................147
DTC Logic ............................................................ .147
Diagnosis Procedure .............................................147
C1A15 GEAR POSITION .................................148
Description ........................................................... .148
DTC Logic .............................................................148
Diagnosis Procedure .............................................148
C1A16 RADAR STAIN ................................... ..150
DTC Logic ............................................................ .150
Diagnosis Procedure .............................................150
C1A17 ICC SENSOR ........................................151
DTC Logic ............................................................ .151
Diagnosis Procedure .............................................151
C1A18 LASER AIMING INCMP .......................152
DTC Logic ............................................................ .152
Revision: 2010 May2011 QX56

DAS-6
LANE DEPARTURE WARNING (LDW) SYSTEM
: Fail-safe (ADAS Control Unit) ..............................
279
LANE DEPARTURE WARNING (LDW) SYSTEM
: Fail-safe (Lane Camera Unit) ..............................
280
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM ........................................................................ ..
280
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : System Description .....................................
280
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : Fail-safe (ADAS Control Unit) .....................
283
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : Fail-safe (Lane Camera Unit) ......................
284
OPERATION ....................................................285
LANE DEPARTURE WARNING (LDW) SYSTEM . ..285
LANE DEPARTURE WARNING (LDW) SYSTEM
: Switch Name and Function ..................................
285
LANE DEPARTURE WARNING (LDW) SYSTEM
: Menu Displayed by Pressing Each Switch ..........
285
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM ........................................................................ ..
286
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : Switch Name and Function .........................
286
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : Menu Displayed by Pressing Each Switch ..
286
HANDLING PRECAUTION ..............................288
Precautions for Lane Departure Warning/Lane
Departure Prevention .......................................... ..
288
DIAGNOSIS SYSTEM (ADAS CONTROL
UNIT) ............................................................... .
290
On Board Diagnosis Function .............................. ..290
CONSULT-III Function (ICC/ADAS) ......................291
DIAGNOSIS SYSTEM (LANE CAMERA
UNIT) ................................................................
301
CONSULT-III Function (LANE CAMERA) ........... ..301
ECU DIAGNOSIS INFORMATION .............303
ADAS CONTROL UNIT .................................. .303
Reference Value .................................................. ..303
Fail-safe .................................................................308
DTC Inspection Priority Chart ................................309
DTC Index .............................................................310
LANE CAMERA UNIT .....................................314
Reference Value .................................................. ..314
Fail-safe .................................................................315
DTC Inspection Priority Chart ................................316
DTC Index .............................................................316
WIRING DIAGRAM ....................................317
DRIVER ASSISTANCE SYSTEMS ................ .317
Wiring Diagram .................................................... ..317
BASIC INSPECTION ..................................332
DIAGNOSIS AND REPAIR WORK FLOW ..... ..332
Work Flow ............................................................ .332
Diagnostic Work Sheet .........................................333
PRE-INSPECTION FOR DIAGNOSIS ..............335
Inspection Procedure ........................................... .335
ACTION TEST ..................................................336
Description ........................................................... .336
Inspection Procedure ............................................336
ADDITIONAL SERVICE WHEN REPLACING
LANE CAMERA UNIT ......................................
339
Description ........................................................... .339
Work Procedure ....................................................339
CAMERA AIMING ADJUSTMENT ...................340
Description ........................................................... .340
Work Procedure (Preparation) ..............................340
Work Procedure (Target Setting) ..........................341
Work Procedure (Camera Aiming Adjustment) .....342
Work Procedure (Target Mark Sample) ................343
DTC/CIRCUIT DIAGNOSIS .......................345
C1A00 CONTROL UNIT ................................. ..345
DTC Logic ............................................................ .345
Diagnosis Procedure .............................................345
C1A01 POWER SUPPLY CIRCUIT 1, C1A02
POWER SUPPLY CIRCUIT 2 ...........................
346
DTC Logic ............................................................ .346
Diagnosis Procedure .............................................346
C1A03 VEHICLE SPEED SENSOR .................347
DTC Logic ............................................................ .347
Diagnosis Procedure .............................................347
C1A04 ABS/TCS/VDC SYSTEM ......................348
DTC Logic ............................................................ .348
Diagnosis Procedure .............................................348
C1A05 BRAKE SW/STOP LAMP SW ..............349
DTC Logic ............................................................ .349
Diagnosis Procedure .............................................349
Component Inspection (ICC Brake Switch) ..........352
Component Inspection (Stop Lamp Switch) ..........352
C1A06 OPERATION SW ..................................353
DTC Logic ............................................................ .353
Diagnosis Procedure .............................................353
Component Inspection ..........................................354
C1A14 ECM ......................................................355
DTC Logic ............................................................ .355
Diagnosis Procedure .............................................355
C1A15 GEAR POSITION .................................356
Description ........................................................... .356
DTC Logic .............................................................356
Diagnosis Procedure .............................................356
Revision: 2010 May2011 QX56

DAS
SYSTEMDAS-15
< SYSTEM DESCRIPTION > [ADAS CONTROL UNIT]
C
D
E
F
G H
I
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K L
M B
N P A
Transmit unit Signal name Description
ECM CAN com-
munica-
tionClosed throttle position signal Receives idle position state (ON/OFF)
Accelerator pedal position signal Receives accelerator pedal position (angle)
ICC prohibition signal
Receives an operable/inoperable state of the ICC sys-
tem
ICC steering switch
signal Main switch signal
Receives the operational state of the ICC steering
switch
SET/COAST switch
signal
CANCEL switch sig-
nal
RESUME/ACCEL-
ERATE switch signal
DISTANCE switch
signal
Dynamic driver as-
sistance switch sig-
nal
Engine speed signal Receives engine speed
Stop lamp switch signal Receives an operational state of the brake pedal
ICC brake switch signal Receives an operational state of the brake pedal
Snow mode signal Receives an operational state of the snow mode
TCM CAN com-
munica-
tionInput speed signal Receives the number of revolutions of input shaft
Current gear position signal Receives a current gear position
Shift position signal Receives a selector lever position
Output shaft revolution signal Receives the number of revolutions of output shaft
ABS actuator
and electric unit
(control unit) CAN com-
munica-
tionABS malfunction signal Receives
a malfunction state of ABS
ABS operation signal Receives an operational state of ABS
ABS warning lamp signal Receives an ON/OFF state of ABS warning lamp
TCS malfunction signal Receives a malfunction state of TCS
TCS operation signal Receives an operational state of TCS
VDC OFF switch signal Receives an ON/OFF state of VDC
VDC malfunction signal Receives a malfunction state of VDC
VDC operation signal Receives an operational state of VDC
Vehicle speed signal (ABS) Receives wheel speeds of four wheels
Stop lamp switch signal Receives an operational state of the brake pedal
Yaw rate signal Receives yaw rate acting on the vehicle
Side G sensor signal Receives lateral G acting on the vehicle
Combination
meter CAN com-
munica-
tion
Parking brake switch signal Receives an operational state of the parking brake
BCM CAN com-
munica-
tionFront wiper request signal Receives an operational state of front wiper(s)
Turn indicator signal
Receives an operational state of the turn signal lamp
and the hazard lamp
Dimmer signal Receives ON/OFF state of dimmer signal
Steering angle
sensor CAN com-
munica-
tionSteering angle sensor malfunction signal Receives a malfunction state of steering angle sensor
Steering angle sensor signal
Receives the number of revolutions, turning direction of
the steering wheel
Steering angle speed signal Receives the turning angle speed of the steering wheel
Revision: 2010 May2011 QX56

DAS-16
< SYSTEM DESCRIPTION >[ADAS CONTROL UNIT]
SYSTEM
Output Signal Item
AV control unitCAN com-
munica-
tionSystem selection signal
Receives a selection state of each item in “Driver Assis-
tance” selected with the navigation system
A/C auto amp. CAN com-
munica-
tion
Ambient temperature signal Receives ambient temperature signal
Transfer control
unit CAN com-
munica-
tion
Current 4WD mode signal Receives a mode selection state of the 4WD shift switch
ICC sensor ITS com-
munica-
tionICC sensor signal
Receives detection results, such as the presence or ab-
sence of a vehicle ahead and distance from the vehicle
Lane camera
unit ITS com-
munica-
tion
Detected lane condition signal Receives detection results of lane marker
Accelerator
pedal actuator ITS com-
munica-
tionAccelerator pedal actuator operation status
signal
Receives an operational state of accelerator pedal ac-
tuator
Side radar LH,
RH ITS com-
munica-
tion
Vehicle detection signal Receives vehicle detection condition of detection zone
IBA OFF switch IBA OFF switch signal Receives an ON/OFF state of the IBA OFF switch
Warning sys-
tems switch Warning systems switch signal
Receives an ON/OFF state of the warning systems
switch
Transmit unit Signal name Description
Reception unit Signal name Description
ECM CAN commu-
nicationICC operation signal Transmits an ICC operation signal necessary for intel-
ligent cruise control
TCM CAN commu-
nication
ICC operation signal Transmits an ICC operation signal necessary for intel-
ligent cruise control via ECM
ABS actuator
and electric
unit (control
unit) CAN commu-
nication
Brake fluid pressure control signal
Transmits a brake fluid pressure control signal to acti-
vates the brake
Target yaw moment signal Transmits a target yaw moment signal to generate
yaw moment to the vehicle
Revision: 2010 May2011 QX56

DAS
SYSTEMDAS-17
< SYSTEM DESCRIPTION > [ADAS CONTROL UNIT]
C
D
E
F
G H
I
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K L
M B
N P A
Combination
meter CAN commu-
nicationMeter display
signal
Own vehicle indicator
signal
Transmits a signal to display a state of the system on
the information display
Vehicle ahead detec-
tion indicator signal
Set vehicle speed indi-
cator signal
Set distance indicator
signal
SET switch indicator
signal
MAIN switch indicator
signal
DCA system switch in-
dicator signal
BSW warning lamp signal Transmits a BSW warning lamp signal to turn ON the
BSW warning lamp
LDP ON indicator lamp signal Transmits an LDP ON indicator lamp signal to turn ON
the LDP ON indicator lamp
Lane departure warning lamp signal Transmits an lane departure warning lamp signal to
turn ON the lane departure warning lamp
ICC warning lamp signal Transmits an ICC warning lamp signal to turn ON the
ICC system warning lamp
IBA OFF indicator lamp signal  Transmits a signal to turn ON the IBA OFF indicator
lamp
 Transmits an ON/OFF state of the intelligent brake
assist
Buzzer output signal Transmits a buzzer output signal to turn ON the buzz-
er of the following systems:
 Intelligent Crui
se Control (ICC)
 Distance Control Assist (DCA)
 Intelligent Brake Assist (IBA)
 Forward Collision Warning (FCW)
ICC sensor ITS commu-
nicationVehicle speed signal
Transmits a vehicle speed calculated by the ADAS
control unit
Steering angle sensor signal Transmits a steering angle sensor signal received
from the steering angle sensor
Lane camera
unit ITS commu-
nicationVehicle speed signal
Transmits a vehicle speed calculated by the ADAS
control unit
Turn indicator signal Transmits a turn indicator signal received from BCM
Accelerator
pedal actuator ITS commu-
nicationAccelerator pedal position signal
Transmits an accelerator pedal angle calculated by
the ADAS control unit
Accelerator pedal feedback force control
signal Transmits a target reaction force value calculated by
the ADAS control unit
Side radar LH,
RH ITS commu-
nicationVehicle speed signal
Transmits a vehicle speed calculated by the ADAS
control unit
BSW indicator signal Transmits a BSW indicator signal to turn ON the BSW
indicator
BSW indicator dimmer signal Transmits a BSW indicator dimmer signal to dimmer
BSW indicator
ICC brake hold
relay ICC brake hold relay drive signal
Activates the brake hold relay and turns ON the stop
lamp
Reception unit Signal name Description
Revision: 2010 May2011 QX56

DAS-22
< SYSTEM DESCRIPTION >[ADAS CONTROL UNIT]
DIAGNOSIS SYSTEM (ADAS CONTROL UNIT)
NOTE:
 Causes of the maximum five cancella
tions (system cancel) are displayed.
 The displayed cancellation causes display the number of the ignition switch ON/OFF up to 254. It is fixed to
254 if it is over 254. It returns to 0 when the same cancellation cause is detected again.
Display Items for The Cause of Automatic Cancellation 1
Work support items Description
CAUSE OF AUTO-CANCEL 1 Displays causes of automatic system cancellation occurred during control of the following sys-
tems
 Vehicle-to-vehicle distance control mode
 Conventional (fixed speed) cruise control mode
 Distance Control Assist (DCA)
CAUSE OF AUTO-CANCEL 2 Displays causes of automatic system cancellation occurred during control of the Lane Depar-
ture Prevention (LDP) system
Cause of cancellation
Vehicle-to-vehicle distance control mode
Conventional (fixed speed) cruise control mode Distance Control Assist
Description
OPERATING WIPER ×The wiper operates at HI (it includes when the wiper is operated at
HI with the wiper switch AUTO position)
OPERATING ABS ××ABS function was operated
OPERATING TCS ×××TCS function was operated
OPERATING VDC ×××VDC function was operated
ECM CIRCUIT ××ECM did not permit ICC operation
OPE SW VOLT CIRC ×××The ICC steering switch input voltage is not within standard range
LASER SUNBEAM ××Intense light such as sunlight entered ICC sensor light sensing part
LASER TEMP ××Temperature around ICC sensor became low
SNOW MODE SW ××SNOW mode switch was pressed
OP SW DOUBLE
TOUCH ××
ICC steering switches were pressed at the same time
VHCL SPD DOWN ×××Vehicle speed lower than the speed as follows
 Vehicle-to-vehicle distance control mode is 24 km/h (15 MPH)
 Conventional (fixed speed) cruise control mode is 32 km/h (20
MPH)
WHL SPD ELEC NOISE ×××Wheel speed sensor signal caught electromagnetic noise
VDC/TCS OFF SW ××VDC OFF switch was pressed
VHCL SPD UNMATCH ×××Wheel speed became different from A/T vehicle speed
TIRE SLIP ××Wheel slipped
IGN LOW VOLT ×××Decrease in ADAS control unit IGN voltage
PARKING BRAKE ON ××The parking brake is operating
WHEEL SPD UNMATCH ×××The wheel speeds of 4 wheels are out of the specified values
Revision: 2010 May2011 QX56

DAS
DIAGNOSIS SYSTEM (ADAS CONTROL UNIT)
DAS-23
< SYSTEM DESCRIPTION > [ADAS CONTROL UNIT]
C
D
E
F
G H
I
J
K L
M B
N P A
Display Items for The Cause of Automatic Cancellation 2
SELF DIAGNOSTIC RESULT
Refer to DAS-38, "DTC Index".
DATA MONITOR
INCHING LOST ×A vehicle ahead is not detected during the following driving when
the vehicle speed is approximately 24 km/h (15 MPH) or less
CAN COMM ERROR ×××ADAS control unit received an abnormal signal with CAN commu-
nication
ABS/TCS/VDC CIRC ×××An abnormal condition occurs in VDC/TCS/ABS system
ECD CIRCUIT ×××An abnormal condition occurs in ECD system
ASCD VHCL SPD DTAC ×Vehicle speed is detached from set vehicle speed
ASCD DOUBLE COMD ×Cancel switch and operation switch are detected simultaneously
APA HI TEMP ×The accelerator pedal actuator integrated motor temperature is
high
ICC SENSOR CAN
COMM ERR ××Communication error between ADAS control unit and the ICC sen-
sor
4WD LOCK MODE ×××Shifting of the 4WD shift switch to 4H or 4L
ABS WARNING LAMP ××ABS warning lamp ON
NO RECORD ××× —
Cause of cancellation Description
OPE VDC/TCS/ABS 1 The activation of VDC, TCS, or ABS during LDP system control
Vehicle dynamics Vehicle behavior exceeds specified value
Steering speed Steering speed was more than the specified value in evasive direction
End by yaw angle Yaw angle was the end of LDP control
Departure yaw large Detected more than the specified value of yaw angle in departure direction
ICC WARNING Target approach warning of ICC system, IBA system or FCW system was activated
CURVATURE Road curve was more than the specified value
Steering angle large Steering angle was more than the specified value
Brake is operated Brake pedal was operated
IGN LOW VOLT Decrease in ADAS control unit IGN voltage
Lateral offset Distance of vehicle and lane was detached in lateral direction more than the specified value
Lane marker lost Lane camera unit lost the trace of lane marker
Lane marker unclear Detected lane marker was unclear
Yaw acceleration Detected yawing speed was more than the specified value
Deceleration large Deceleration in a longitudinal direction was more than the specified value
Accel is operated Accelerator pedal was depressed
Departure steering Steering wheel was steered more than the specified value in departure direction
Evasive steering Steering wheel was steered more than the specified value in the evasive direction
R range Selector lever was operated to R range
Parking brake drift Rear wheels lock was detected
Not operating condition Did not meet the operating condition (vehicle speed, turn signal operation, etc)
SNOW MODE SW SNOW mo de switch was pressed
VDC OFF SW VDC OFF switch was pressed
OPE VDC/ABS 2 The activation of VDC or ABS duri ng a standby time of LDP system control
4WD LOCK MODE Shifting of the 4WD shift switch to 4H or 4L
NO RECORD —
Revision: 2010 May2011 QX56