2011 INFINITI QX56 ABS

DAS
ADAS CONTROL UNITDAS-245
< ECU DIAGNOSIS INFORMATION > [FCW]
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- CRNT: A malfunction is detected now
- PAST: A malfunction was detected in the past
 IGN counter is displayed on FFD (Freeze Frame Data).
- 0: The malfunctions that are detected now CAN communication system (U1000, U1010)
- 1 - 39: It increases like 0 → 1 → 2 ··· 38 → 39 after returning to the normal condition whenever the ignition
switch OFF → ON. It returns to 0 when a malfunc tion is detected again in the process.
- If it is over 39, it is fixed to 39 unt il the self-diagnosis results are erased.
Other than CAN communication s ystem (Other than U1000, U1010)
- 1 - 49: It increases like 0 → 1 → 2 ··· 38 → 49 after returning to the normal condition whenever the ignition
switch OFF → ON. It returns to 0 when a malfunc tion is detected again in the process.
- If it is over 49, it is fixed to 49 unt il the self-diagnosis results are erased.
Systems for fail-safe
 A: Vehicle-to-vehicle distance control mode
 B: Conventional (fixed speed) cruise control mode
 C: Intelligent Brake Assist (IBA)
 D: Forward Collision Warning (FCW)
 E: Distance Control Assist (DCA)
 F: Lane Departure Warning (LDW)/Lane Departure Prevention (LDP)
 G: Blind Spot Warning (BSW)
DTC
CONSULT-III display Warning lamp Fail-safe
Reference
CONSULT-III On board
display
ICC system warning lamp
IBA OFF indicator lamp
Lane departure warning lamp BSW warning lamp
System
C1A00 0 CONTROL UNIT ON ON ON ON A, B, C, D, E, F, G DAS-57
C1A01 1 POWER SUPPLY CIR ON ON ON ON A, B, C, D, E, F, GDAS-58
C1A02 2 POWER SUPPLY CIR 2 ON ON ON ON A, B, C, D, E, F, GDAS-58
C1A03 3 VHCL SPEED SE CIRC ON ON ON ON A, B, C, D, E, F, GCCS-87
C1A04 4 ABS/TCS/VDC CIRC ON ON ON A, B, C, D, E, FCCS-89
C1A05 5 BRAKE SW/STOP L SW ON ON ON A, B, C, D, E, FCCS-90
C1A06 6 OPERATION SW CIRC ON ON A, B, E, FCCS-94
C1A12 12LASER BEAM OFFCN-
TR ON ON A, C, D, E
CCS-96
C1A13 13 STOP LAMP RLY FIX ON ON A, B, C, D, E CCS-97
C1A14 14 ECM CIRCUIT ON ON A, B, E, FCCS-103
C1A15 15 GEAR POSITION ON ON ON ON A, B, C, D, E, F, GCCS-104
C1A16 16 RADAR STAIN ON ON A, C, D, ECCS-106
C1A17 17 ICC SENSOR MALF ON ON A, B, C, D, ECCS-108
C1A18 18 LASER AIMING INCMP ON ON A, C, D, ECCS-109
C1A21 21ICC SENSOR HIGH
TEMP ON ON A, B, C, D, E
CCS-111
C1A24 24 NP RANGE ON ON ON ON A, B, C, D, E, F, G CCS-113
C1A26 26 ECD MODE MALF ON ON A, B, C, D, ECCS-115
C1A27 27 ECD PWR SUPLY CIR ON ON A, B, C, D, ECCS-116
C1A33 33CAN TRANSMISSION
ERR ON A, B, E
CCS-118
Revision: 2010 May2011 QX56

DAS-274
< SYSTEM DESCRIPTION >[LDW & LDP]
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
LANE DEPARTURE WARNING (LDW) SYSTEM
LANE DEPARTURE WARNING (LDW) S
YSTEM : Component Parts Location
INFOID:0000000006223700
LANE DEPARTURE WARNING (LDW) SYSTEM : Component DescriptionINFOID:0000000006223701
1. Lane camera unit 2. Lane departure warning lamp (Yel-
low)
(On the combination meter)3. Warning systems switch
4. Warning systems ON indicator 5. ABS actuator and electric unit (con-
trol unit)
Refer to BRC-10, "
Component Parts
Location"
6. BCM
Refer to BCS-4, "
BODY CONTROL
SYSTEM : Component Parts Loca-
tion"
7. Warning buzzer 8. ADAS control unit
Refer to DAS-13, "
Component Parts
Location"
A. Front of the map lamp B. Instrument lower panel (LH) C. Behind of instrument lower panel
(LH)
JSOIA0367ZZ
Component Description
ADAS control unit  Judges the lane departure depending on the lane detection result and each signals
 Controls the warning buzzer and the warning systems ON indicator
 Transmits lane departure warning lamp signal to combination meter via CAN communica-
tion
Lane camera unit  Detects the lane marker in travel lane
 Transmits the detected lane condition signal to ADAS control unit via ITS communication
ABS actuator and electric unit (con-
trol unit) Transmits the vehicle speed signal (wheel speed) to ADAS control unit via CAN communica-
tion
Revision: 2010 May2011 QX56

DAS
COMPONENT PARTSDAS-275
< SYSTEM DESCRIPTION > [LDW & LDP]
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LANE DEPARTURE PREVENTION (LDP) SYSTEM
LANE DEPARTURE PREVENTION (LDP) SYSTEM : Component Parts Location
INFOID:0000000006223702
Warning systems switch Inputs the warning systems switch signal to ADAS control unit
Warning systems ON indicator
(On the warning systems switch) Turns on the warning systems ON indicator, according to an warning systems ON indicator
signal received from the ADAS control unit
Warning buzzer Activates the warning buzzer, according to a warning buzzer signal received from the ADAS
control unit
Combination meter Turns the lane departure warning lamp ON/OFF according to the signals from ADAS control
unit via CAN communication
BCM Transmits the turn indicator signal to ADAS control unit via CAN communication Component Description
1. Lane camera unit 2. Dynamic driver assistance switch
(On the ICC steering switch)3.  Lane departure warning lamp (Yel-
low)
 LDP ON indicator (Green)
(On the combination meter)
4. Transfer control unit Refer to DLN-10, "
Component Parts
Location"
5. AV control unit
Refer to AV- 9 , "
Component Parts Lo-
cation"
6. ECM
Refer to EC-16, "
Component Parts
Location"
7. TCM
Refer to TM-10, "
A/T CONTROL
SYSTEM : Component Parts Loca-
tion"
8. ABS actuator and electric unit (con-
trol unit)
Refer to BRC-10, "
Component Parts
Location"
9. BCM
Refer to BCS-4, "
BODY CONTROL
SYSTEM : Compon ent Parts Loca-
tion"
10. Warning buzzer 11. Steering angle sensor
Refer to BRC-10, "
Component Parts
Location"
12. ADAS control unit
Refer to DAS-13, "
Component Parts
Location"
A. Front of map lamp B. Behind instrument lower panel (LH)
JSOIA0368ZZ
Revision: 2010 May2011 QX56

DAS-276
< SYSTEM DESCRIPTION >[LDW & LDP]
COMPONENT PARTS
LANE DEPARTURE PREVENTION (LDP ) SYSTEM : Component Description
INFOID:0000000006223703
Component Description
ADAS control unit  Judges lane departure based on each signal and calculates yaw moment necessary to generate
force toward the direction to recover the vehicle from the lane departure
 Outputs the warning buzzer signal to the warning buzzer
 Transmits a target yaw moment signal to the ABS actuator and electric unit (control unit) via CAN communication
 Transmits the lane departure warning lamp signal and LDP ON indicator lamp signal to combina- tion meter via CAN communication
Lane camera unit  Detects the lane marker in travel lane
 Transmits the detected lane condition signal to ADAS control unit via ITS communication
ABS actuator and electric unit
(control unit)  Transmits the vehicle speed signal (wheel speed) to ADAS control unit via CAN communication
 Transmits the yaw rate signal and side G sensor signal to ADAS control unit via CAN communi-
cation
 Receives a target yaw moment signal from the ADAS control unit via CAN communication and
controls brake pressure of four wheels, respectively
Warning buzzer Activates the warning buzzer, according to a warning buzzer signal received from the ADAS control
unit
Dynamic driver assistance
switch
(On the ICC steering switch) ECM receives an ICC steering switch (dynamic driver assistance switch) signal and transmits the
signal to ADAS control unit via CAN communication
Combination meter Turns on the following indicator/warning lamp, according to a signal received for the ADAS control
unit via CAN communication
 LDP ON indicato
r lamp (Green)
 Lane departure warning lamp (Yellow)
BCM Transmits the turn indicator signal to ADAS control unit via CAN communication
ECM Transmits the accelerator pedal position signal, engine speed signal and ICC steering switch signal
(dynamic driver assistance switch signal) to ADAS control unit via CAN communication
Steering angle sensor Transmits the steering angle sensor signal to ADAS control unit via CAN communication
TCM Transmits the output shaft revolution signal, input speed signal, current gear position signal and shift
position signal to ADAS control unit via CAN communication
Transfer control unit Transmits the current 4WD mode signal to ADAS control unit via CAN communication
AV control unit Transmits the system selection signal to ADAS control unit via CAN communication
Revision: 2010 May2011 QX56

DAS
SYSTEM
DAS-277
< SYSTEM DESCRIPTION >[LDW & LDP]
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SYSTEM
LANE DEPARTURE WARNING (LDW) SYSTEM
LANE DEPARTURE WARNING (LDW ) SYSTEM : System DescriptionINFOID:0000000006223704
SYSTEM DIAGRAM
ADAS CONTROL UNIT INPUT/OUTPUT SIGNAL ITEM
Input Signal Item
Output Signal Item
FUNCTION DESCRIPTION
 Lane Departure Warning (LDW) system provides a l ane departure warning function when the vehicle is
driven at speeds of approximately 70 km/h (45 MPH) or more.
JSOIA0285GB
Transmit unit Signal name Description
ABS actuator
and electric unit
(control unit) CAN com-
munica-
tion
Vehicle speed signal (ABS) Receives
wheel speeds of four wheels
BCM CAN com-
munica-
tionTurn indicator signal
Receives an operational state of the turn signal lamp
and the hazard lamp
Lane camera
unit ITS com-
munica-
tion
Detected lane condition signal Receives detection results of lane marker
Warning sys-
tems switch Warning systems switch signal
Receives an ON/OFF state of the warning systems
switch
Reception unit Signal name Description
Combination
meter CAN commu-
nication
Lane departure warning lamp signal Transmits a lane departure warning lamp signal to
turn ON the lane departure warning lamp
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
Warning buzz-
er Warning buzzer signal Activates the warning buzzer
Warning sys-
tems ON indi-
cator Warning systems ON indicator signal Turns ON the warning systems ON indicator
Revision: 2010 May2011 QX56

DAS
SYSTEM
DAS-281
< SYSTEM DESCRIPTION >[LDW & LDP]
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Output Signal Item
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
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
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-
tion
Turn indicator signal
Receives an operational state of the turn signal lamp
and the hazard lamp
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
AV control unit CAN com-
munica-
tion
System selection signal
Receives a selection state of each item in “Driver Assis-
tance” selected with the navigation system
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-
tion
ICC 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
Transmit unit Signal name Description
Reception unit Signal name Description
ABS actuator
and electric
unit (control
unit) CAN commu-
nication
Target yaw moment signal Transmits a target yaw moment signal to generate
yaw moment to the vehicle
Combination
meter CAN commu-
nicationLDP 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
Revision: 2010 May2011 QX56

DAS-282
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
FUNCTION DESCRIPTION
 Lane Departure Prevention (LDP) system provides a lane departure warning and brake control assistance
when the vehicle is driven at speeds of approximately 70 km/h (45 MPH) or more.
 When the vehicle approaches either the left or the right side of the traveling lane, a warning sounds and the
lane departure warning lamp (yellow) on the combinati on meter blinks to alert the driver. Then, the LDP sys-
tem automatically applies the brakes for a short period of ti me to help assist the driver to return the vehicle to
the center of the traveling lane.
 Warning and brake control are not performed during turn signal operation (lane change side).
 The warning and assist functions stop when the vehicl e returns to a position inside of the lane marker.
EXAMPLE
When the vehicle approaches the right lane marker, the driv er is alerted by the buzzer and the blinking of lane
departure warning lamp (yellow). Simultaneously, the left brake is controlled independently to generate force
toward the direction to recover the vehicle from the lane departure.
OPERATION DESCRIPTION
 When the system is turned ON by dynamic driver a ssistance switch, ADAS control unit transmits LDP ON
indicator signal to combination meter via CAN communication.
 Lane camera unit monitors lane markers of the traveling lane. It transmits the detected lane condition signal to ADAS control unit via ITS communication.
 When judging from a lane marker detection signal that the vehicle is approaching the lane marker, ADAS
control unit controls the following items.
- Activates warning buzzer.
- Transmits a lane departure warning lamp signal to combination meter via CAN communication.
- Calculates necessary yaw moment to transmit a target yaw moment signal to ABS actuator and electric unit (control unit) via CAN communication.
 When receiving the target yaw moment signal, ABS act uator and electric unit (control unit) controls brake
pressure of four wheels, respectively.
 When receiving the signal from ADAS control unit, combination meter turns ON/OFF the lane departure warning lamp (yellow) and the LDP ON indicator lamp (green).
OPERATING CONDITION
 LDP ON indicator lamp: ON
 Vehicle speed: approximately 70 km/h (45 MPH) or more
 Turn indicator signal: After 2 seconds or more from turned OFF
NOTE:
 When the LDP system setting on the navigation screen is ON.
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
Warning buzz-
er Warning buzzer signal Activates the warning buzzer
Reception unit Signal name Description
JPOIA0013GB
Revision: 2010 May2011 QX56

DAS-292
< SYSTEM DESCRIPTION >[LDW & LDP]
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