2011 INFINITI QX56 ECU

DAS-5
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Description ..........................................................
..
208
Diagnosis Procedure .............................................208
NORMAL OPERATING CONDITION ...............210
Description .......................................................... ..210
REMOVAL AND INSTALLATION .............212
ICC SENSOR .................................................. ..212
Exploded View .................................................... ..212
Removal and Installation .......................................212
ACCELERATOR PEDAL ASSEMBLY ............213
Exploded View .................................................... ..213
DYNAMIC DRIVER ASSISTANCE SWITCH ...214
Exploded View .................................................... ..214
FCW
PRECAUTION ................ ............................
215
PRECAUTIONS .............................................. ..215
Precaution for FCW System Service ................... ..215
SYSTEM DESCRIPTION ...........................216
COMPONENT PARTS ................................... ..216
Component Parts Location .................................. ..216
Component Description .........................................216
SYSTEM ...........................................................218
System Description ............................................. ..218
Fail-safe (ADAS Control Unit) ...............................219
Fail-safe (ICC Sensor) ..........................................220
OPERATION .....................................................221
Switch Name and Function ................................. ..221
Menu Displayed by Pressing Each Switch ............221
HANDLING PRECAUTION ..............................223
Precautions for Forward Collision Warning ......... ..223
DIAGNOSIS SYSTEM (ADAS CONTROL
UNIT) ................................................................
224
On Board Diagnosis Function ............................. ..224
CONSULT-III Function (ICC/ADAS) ......................225
DIAGNOSIS SYSTEM (ICC SENSOR) ............235
CONSULT-III Function (LASER) ...........................235
ECU DIAGNOSIS INFO RMATION ............237
ADAS CONTROL UNIT .................................. ..237
Reference Value ................................................. ..237
Fail-safe ................................................................242
DTC Inspection Priority Chart ...............................243
DTC Index .............................................................244
ICC SENSOR ....................................................248
Reference Value ................................................. ..248
Fail-safe ................................................................249
DTC Inspection Priority Chart ...............................249
DTC Index ........................................................... ..249
WIRING DIAGRAM ....................................251
DRIVER ASSISTANCE SYSTEMS .................251
Wiring Diagram .................................................... ..251
BASIC INSPECTION .................................266
DIAGNOSIS AND REPAIR WORK FLOW .....266
Work Flow ............................................................ ..266
SYMPTOM DIAGNOSIS ............................268
FORWARD COLLISION WARNING SYSTEM
SYMPTOMS ....................................................
268
Symptom Table ................................................... ..268
FCW SYSTEM IS NOT ACTIVATED ..............269
Description .............................................................269
Diagnosis Procedure .............................................269
NORMAL OPERATING CONDITION .............270
Description .............................................................270
REMOVAL AND INSTALLATION .............271
WARNING SYSTEMS SWITCH ......................271
Removal and Installation ..................................... ..271
LDW & LDP
PRECAUTION ............... .............................
272
PRECAUTIONS ...............................................272
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
272
Precautions For Harness Repair ...........................272
Precaution for LDW/LDP System Service .............273
SYSTEM DESCRIPTION ...........................274
COMPONENT PARTS ....................................274
LANE DEPARTURE WARNING (LDW) SYSTEM ..274
LANE DEPARTURE WARNING (LDW) SYSTEM
: Component Parts Location ................................ ..
274
LANE DEPARTURE WARNING (LDW) SYSTEM
: Component Description .......................................
274
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM ........................................................................ ..
275
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : Component Parts Location .........................
275
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : Component Description ..............................
276
SYSTEM ..........................................................277
LANE DEPARTURE WARNING (LDW) SYSTEM ..277
LANE DEPARTURE WARNING (LDW) SYSTEM
: System Description ............................................ ..
277
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-8
U1516 CAM CAN 3 ..........................................385
DTC Logic ............................................................ ..385
Diagnosis Procedure .............................................385
U1520 4WD CAN 3 ..........................................386
DTC Logic ............................................................ ..386
Diagnosis Procedure .............................................386
POWER SUPPLY AND GROUND CIRCUIT ...387
ADAS CONTROL UNIT ......................................... ..387
ADAS CONTROL UNIT : Diagnosis Procedure .....387
LANE CAMERA UNIT ............................................ ..387
LANE CAMERA UNIT : Diagnosis Procedure .......387
WARNING SYSTEMS SWITCH CIRCUIT .......389
Component Function Check ................................ ..389
Diagnosis Procedure .............................................389
Component Inspection ...........................................390
WARNING SYSTEMS ON INDICATOR CIR-
CUIT .................................................................
391
Component Function Check ................................ ..391
Diagnosis Procedure .............................................391
Component Inspection ...........................................392
WARNING BUZZER CIRCUIT .........................393
Component Function Check ................................ ..393
Diagnosis Procedure .............................................393
SYMPTOM DIAGNOSIS ............................395
LDW & LDP SYSTEM SYMPTOMS ............... .395
Symptom Table ................................................... ..395
LANE DEPARTURE WARNING LAMP DOES
NOT TURNED ON ...........................................
397
Description ........................................................... ..397
Diagnosis Procedure .............................................397
LDP ON INDICATOR LAMP DOES NOT
TURNED ON ....................................................
398
Description ........................................................... ..398
Diagnosis Procedure .............................................398
THE SYSTEM OPERATES EVEN WHEN US-
ING TURN SIGNAL .........................................
399
Description ........................................................... ..399
Diagnosis Procedure .............................................399
LDP SYSTEM SETTINGS CANNOT BE
TURNED ON/OFF ON THE NAVIGATION
SCREEN ..........................................................
400
Description ........................................................... ..400
Diagnosis Procedure .............................................400
NORMAL OPERATING CONDITION ..............401
Description ........................................................... ..401
REMOVAL AND INSTALLATION ..............403
LANE CAMERA UNIT .................................... ..403
Removal and Installation ...................................... .403
WARNING SYSTEMS SWITCH .......................404
Removal and Installation ...................................... .404
DYNAMIC DRIVER ASSISTANCE SWITCH ...405
Exploded View ..................................................... .405
WARNING BUZZER .........................................406
Removal and Installation ...................................... .406
BSW
PRECAUTION ............... ............................
407
PRECAUTIONS .............................................. ..407
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
407
Precaution for BSW System Service ....................407
SYSTEM DESCRIPTION ..........................408
COMPONENT PARTS .................................... ..408
Component Parts Location .................................. .408
Component Description ........................................409
SYSTEM ...........................................................410
System Description .............................................. .410
Fail-safe (ADAS Control Unit) ...............................413
Fail-safe (Side Radar) ...........................................414
OPERATION .....................................................415
Switch Name and Function .................................. .415
System Display and Warning ................................415
HANDLING PRECAUTION ............................ ..417
Precautions for Blind Spot Warning ..................... .417
DIAGNOSIS SYSTEM (ADAS CONTROL
UNIT) .................................................................
418
On Board Diagnosis Function .............................. .418
CONSULT-III Function (ICC/ADAS) .....................419
DIAGNOSIS SYSTEM (SIDE RADAR LH) .......429
CONSULT-III Function (SIDE RADAR LEFT) ...... .429
DIAGNOSIS SYSTEM (SIDE RADAR RH) ......431
CONSULT-III Function (SIDE RADAR RIGHT) ... .431
ECU DIAGNOSIS INFORMATION ............433
ADAS CONTROL UNIT .................................. ..433
Reference Value .................................................. .433
Fail-safe ................................................................438
DTC Inspection Priority Chart ...............................439
DTC Index .............................................................440
SIDE RADAR LH ............................................ ..444
Reference Value .................................................. .444
Fail-safe ................................................................444
DTC Inspection Priority Chart ...............................445
Revision: 2010 May2011 QX56

DAS
DIAGNOSIS SYSTEM (ADAS CONTROL UNIT)
DAS-21
< SYSTEM DESCRIPTION > [ADAS CONTROL UNIT]
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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:0000000006223475
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

DAS
ADAS CONTROL UNITDAS-31
< ECU DIAGNOSIS INFORMATION > [ADAS CONTROL UNIT]
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ECU DIAGNOSIS INFORMATION
ADAS CONTROL UNIT
Reference ValueINFOID:0000000006223476
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

DAS-32
< ECU DIAGNOSIS INFORMATION >[ADAS CONTROL UNIT]
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

DAS
ADAS CONTROL UNITDAS-33
< ECU DIAGNOSIS INFORMATION > [ADAS CONTROL UNIT]
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GEAR While driving Displays the
gear position
MODE SIG Start the engine and press
MAIN switch When ICC system is deactivated Off
When vehicle-to-vehicle distance control mode is acti-
vated
ICC
When conventional (fixed speed) cruise control mode is
activated ASCD
SET DISP IND  Drive the vehicle and acti-
vate the conventional (fixed
speed) cruise control mode
 Press SET/COAST switch SET switch indicator ON On
SET switch indicator OFF Off
DISTANCE Drive the vehicle and activate
the vehicle-to-vehicle distance
control mode When a vehicle ahead is detected
Displays the dis-
tance from the
preceding vehi- cle
When a vehicle ahead is not detected 0.0
RELATIVE SPD Drive the vehicle and activate
the vehicle-to-vehicle distance
control mode When a vehicle ahead is detected
Displays the rel-
ative speed.
When a vehicle ahead is not detected 0.0
DYNA ASIST SW Ignition switch ON When dynamic driver assistance switch is pressed On
When dynamic driver assistance switch is not pressed Off
DCA ON IND Start the engine and press dy-
namic driver assistance switch
(When DCA setting is ON) DCA system OFF
(DCA system switch indicator OFF)
Off
DCA system ON
(DCA system switch indicator ON) On
DCA VHL AHED Drive the vehicle and activate
the DCA system When a vehicle ahead is not detected (vehicle ahead
detection indicator OFF)
Off
When a vehicle ahead is detected (vehicle ahead de-
tection indicator ON) On
IBA SW Ignition switch ON When the IBA OFF switch is pressed On
When the IBA OFF switch is not pressed Off
FCW SYSTEM ON Ignition switch ON When the FCW system is ON
(Warning systems ON indicator ON)
On
When the FCW system is OFF
(Warning systems ON indicator OFF) Off
APA TEMP Engine running Display the ac-
celerato
r pedal
actuator inte- grated motor temperature
APA PWR Ignition switch ON Power supply
voltage value of
accelerator ped- al actuator
LDW SYSTEM ON Ignition switch ON When the LDW system is ON
(Warning systems ON indicator ON)
On
When the LDW system is OFF
(Warning systems ON indicator OFF) Off
LDW ON LAMP Ignition switch ON Warning systems ON indicator ON On
Warning systems ON indicator OFF Off
Monitor item Condition Value/Status
Revision: 2010 May2011 QX56

DAS-34
< ECU DIAGNOSIS INFORMATION >[ADAS CONTROL UNIT]
ADAS CONTROL UNIT
LDP ON INDStart the engine and press dy-
namic driver assistance switch
(When LDP system setting is
ON) LDP ON indicator lamp ON On
LDP ON indicator lamp OFF Off
LANE DPRT W/L Drive the vehicle and activate
the LDW system or LDP sys-
tem Lane departure warning lamp ON On
Lane departure warning lamp OFF Off
LDW BUZER OUT-
PUT Drive the vehicle and activate
the LDW/LDP system or BSW
system When the buzzer of the following system operates
 LDW/LDP system
 BSW system
On
When the buzzer of the following system does not oper-
ate
 LDW/LDP system
 BSW system Off
LDP SYSTEM ON Start the engine and press dy-
namic driver assistance switch
(When LDP system setting is
ON) When the LDP system is ON On
When the LDP system is OFF Off
READY signal Start the engine and press dy-
namic driver assistance switch
(When LDP system setting is
ON) When the LDP system is ON On
When the LDP system is OFF Off
Camera lost Drive the vehicle and activate
the LDW system, LDP system Both side lane markers are detected Detect
Deviate side lane marker is lost Deviate
Both side lane markers are lost Both
Shift position  Engine running
 While driving Displays the
shift position
Turn signal Turn signal lamps OFF
Off
Turn signal lamp LH blinking LH
Turn signal lamp RH blinking RH
Turn signal lamp LH and RH blinking LH&RH
SIDE G While driving Vehicle turning right Negative value
Vehicle turning left Positive value
WARN REQ Drive the vehicle and activate
the LDP system Lane departure warning is operating On
Lane departure warning is not operating Off
STATUS signal Drive the vehicle and activate
the LDP system When the LDP system is ON Stnby
When the LDP system is operating Warn
When the LDP system is canceled Cancl
When the LDP system is OFF Off
Lane unclear While driving Lane marker is unclear On
Lane marker is clear Off
FUNC ITEM Ignition switch ON FUNC1
FUNC ITEM (NV-ICC) Ignition switch ON Off
FUNC ITEM (NV-
DCA) Ignition switch ON
Off
DCA SELECT Ignition switch ON “Distance Control Assist” set with the navigation system
is ON
On
“Distance Control Assist” set with the navigation system
is OFF Off
Monitor item Condition Value/Status
Revision: 2010 May2011 QX56