2011 INFINITI QX56 cruise control

DAS
ADAS CONTROL UNITDAS-443
< ECU DIAGNOSIS INFORMATION > [BSW]
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NOTE:
With the detection of “U1000” some syst ems do not perform the fail-safe operation.
A system controlling based on a signal received from the control unit performs fail-safe operation when the
communication with the ADAS control unit becomes inoperable.
U1500 145 CAM CAN CIR 2 ON F DAS-381
U1501 146 CAM CAN CIR 1 ON FDAS-382
U1502 147ICC SEN CAN COMM
CIR ON ON A, B, C, D, E
CCS-152
U1503 150 SIDE RDR L CAN CIR 2 ON G DAS-502
U1504 151 SIDE RDR L CAN CIR 1 ON GDAS-503
U1505 152 SIDE RDR R CAN CIR 2 ON GDAS-504
U1506 153 SIDE RDR R CAN CIR 1 ON GDAS-505
U1507 154LOST COMM (SIDE
RDR R) ON G
DAS-506
U1508 155LOST COMM (SIDE
RDR L) ON G
DAS-507
U150B 157 ECM CAN CIRC 3 ON ON ON A, B, E, F, G DAS-498
U150C 158 VDC CAN CIRC 3 ON ON ON ON A, B, C, D, E, F, G DAS-499
U150D 159 TCM CAN CIRC 3 ON ON ON ON A, B, C, D, E, F, GDAS-500
U150E 160 BCM CAN CIRC 3 ON ON ON A, B, E, F, GDAS-501
U150F 161 AV CAN CIRC 3 DAS-61
U1512 162 HVAC CAN CIRC3 ON FDAS-383
U1513 163 METER CAN CIRC 3 ON ON ON ON A, B, C, D, E, F, GDAS-508
U1514 164 STRG SEN CAN CIRC 3 ON ON ON A, B, C, D, E, GDAS-509
U1515 165 ICC SENSOR CAN
CIRC 3 ON ON A, B, C, D, E
CCS-155
U1516 166 CAM CAN CIRC 3 ON F DAS-385
U1517 167 APA CAN CIRC 3 ON A, B, ECCS-156
U1518 168 SIDE RDR L CAN CIRC 3 ON G DAS-510
U1519 169SIDE RDR R CAN CIRC
3 ON G
DAS-511
U1520 176 4WD CAN CIRC 3 ON ON ON A, B, C, D, E, F CCS-157
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
Revision: 2010 May2011 QX56

COMPONENT PARTSEC-21
< SYSTEM DESCRIPTION > [VK56VD]
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Accelerator Pedal
Position SensorINFOID:0000000006217658
The accelerator pedal position (APP) sensor is installed on the
accelerator pedal assembly. The sensor detects the accelerator
position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometer which transform the accelerator pedal
position into output voltage, and emit the voltage signals to the ECM.
The ECM judges the current opening angle of the accelerator pedal
from these signals and controls the throttle control motor based on
these signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The
ECM uses this signal for engine operations such as fuel cut.
Air Fuel Ratio (A/F) Sensor 1INFOID:0000000006217659
DESCRIPTION
The sensor element of the A/F sensor 1 is composed an electrode layer, which transports ions. It has a heater
in the element.
The sensor is capable of precise measurement = 1, but also in the lean and rich range. Together with its
control electronics, the sens or outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at the sensor cell. An electrode layer is
applied voltage, and this current relative oxygen density in lean. Also this current relative hydrocarbon density
in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of approxi-
mately 760 °C (1,400 °F).
A/F SENSOR 1 HEATER
A/F sensor 1 heater is integrated in the sensor.
The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating
condition to keep the temperature of A/F s ensor 1 element within the specified range.
ASCD Brake Switch & Stop Lamp Switch INFOID:0000000006217660
Stop lamp switch and ASCD brake switch are installed to brake pedal bracket.
When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).
ASCD Steering SwitchINFOID:0000000006217661
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
ASCD IndicatorsINFOID:0000000006217662
ASCD operation status is indicated by CRUISE indicator in combination meter.
ECM transmits the ASCD status signal to the combi nation meter via CAN communication according to ASCD
operation.
PBIB1741E
JSBIA0527GB
Revision: 2010 May2011 QX56

OPERATIONEC-49
< SYSTEM DESCRIPTION > [VK56VD]
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OPERATION
AUTMATIC SPEED CONTROL DEVICE (ASCD)
AUTMATIC SPEED CONTROL DEVICE (A
SCD) : Switch Name and Function
INFOID:0000000006217719
SWITCHES AND INDICATORS
SET SPEED RANGE
ASCD system can be set the following vehicle speed.
SWITCH OPERATION
CANCEL CONDITION
 When any of following conditions exist, the cruise operation is canceled.
- CANCEL switch is pressed
- ASCD MAIN switch pressed (Set speed is cleared)
- More than two switches at ASCD steering switch ar e pressed at the same time (Set speed is cleared)
- Brake pedal is depressed
- Selector lever position is changed to N, P or R
- Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed
- TCS system is operated
 When the ECM detects any of the following conditions , the ECM cancels the cruise operation and informs
the driver by blinking CRUISE indicator lamp.
1. CRUISE indicator lamp 2. CANCEL switch 3. ASCD MAIN switch
4. SET/COAST switch 5. RESUME/ACCELERATE switch
A. On the combination meter B. On the steering wheel
JPBIA3226ZZ
Minimum speed (Approx.) Maximum speed (Approx.)
40 km/h (25 MPH) 143 km/h (88 MPH)
Item Function
CANCEL switch Cancels the cruise control driving.
RESUME/ACCELERATE switch  Resumes the set speed.
 Increases speed incrementally during cruise control driving.
SET/COAST switch  Sets desired cruise speed.
 Decreases speed incrementally during cruise control driving.
ASCD MAIN switch Master switch to activate the ASCD system.
(CRUISE indicator lamp is turn
ed ON when ASCD system is ON.)
Revision: 2010 May2011 QX56

EC-50
< SYSTEM DESCRIPTION >[VK56VD]
OPERATION
- Engine coolant temperature is slightly higher than
the normal operating temperature. Then CRUISE indica-
tor lamp is blinked slowly.
NOTE:
Engine coolant temperature decreases to the norma l operating temperature, CRUISE indicator lamp stop
blinking and the cruise operation is able to work.
- Malfunction for some self-diagnoses regarding ASCD s ystem. CRUISE indicator lamp is blinked quickly.
 When ASCD MAIN switch is turned to OFF during the cr uise control driving, all of ASCD operations is can-
celed and vehicle speed memory is erased.
Revision: 2010 May2011 QX56

GI-16
< HOW TO USE THIS MANUAL >
ABBREVIATIONS
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ABBREVIATION DESCRIPTIONI/M Inspection and maintenanceIA Intake air
IAC Idle air control IAT Intake air temperature
IBA Intelligent brake assist IC Ignition control
ICC Intelligent cruise control
ICM Ignition control module
IPDM E/R Intelligent power distribution module engine room ISC Idle speed controlISS Input shaft speed
ABBREVIATION DESCRIPTION KS Knock sensor
ABBREVIATION DESCRIPTION LCD Liquid crystal display
LCU Local control unitLDP Lane departure prevention
LDW Lane departure warning LED Light emitting diode LH Left-hand
LIN Local interconnect network
ABBREVIATION DESCRIPTION M/T Manual transaxle/transmission
MAF Mass airflow
MAP Manifold absolute pressure MI Malfunction indicator
MIL Malfunction indicator lamp
ABBREVIATION DESCRIPTION NOX Nitrogen oxides
ABBREVIATION DESCRIPTION O2 Oxygen
O2S Oxygen sensor
OBD On board diagnostic OC Oxidation catalytic converter
OD OverdriveOL Open loop
OSS Output shaft speed
Revision: 2010 May2011 QX56

MWI
SYSTEMMWI-13
< SYSTEM DESCRIPTION >
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SPEEDOMETER
SPEEDOMETER : System DiagramINFOID:0000000006221696
SPEEDOMETER : System DescriptionINFOID:0000000006221697
 The ABS actuator and electric unit (control unit) conv erts the rectangular wave signal provided by the wheel
sensor to a vehicle speed signal and transmits it to the combination meter via CAN communication.
 The combination meter indicates the vehicle speed to the speedometer according to the vehicle speed sig-
nal received via CAN communication.
TACHOMETER
Warning lamp/indicator lamp ABS warning lamp
The lamp turns ON by suspending communication.
VDC warning lamp
Brake warning lamp
IBA OFF indicator lamp
4WD warning lamp
Malfunction indicator lamp
VDC OFF indicator lamp
CRUISE warning lamp
Low tire pressure warning lamp The lamp blinking caused by suspending communication.
High beam indicator lamp
The lamp turns OFF by suspending communication.
Turn signal indicator lamp
Tail lamp indicator lamp
A/T CHECK indicator lamp
Key warning lamp
AT P w a r n i n g l a m p
Lane departure warning lamp
LDP ON indicator lamp
CRUISE indicator lamp
Oil pressure warning lamp
SNOW mode indicator lamp
TOW mode indicator lamp
CK SUSP indicator lamp
BSW indicator lamp
Function Specifications
JSNIA2382GB
Revision: 2010 May2011 QX56

MWI
DIAGNOSIS SYSTEM (COMBINATION METER)
MWI-31
< SYSTEM DESCRIPTION >
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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 fr
om 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.
FR FOG IND
[Off] This item is displayed, but cannot be monitored.
RR FOG IND
[Off] This item is displayed, but cannot be monitored.
LIGHT IND
[On/Off] Status of light indicator lamp detected from position light request signal is received
from BCM via CAN communication.
OIL W/L
[On/Off] Status of oil pressure warning lamp detected from oil pressure switch signal is re-
ceived from BCM via CAN communication.
MIL
[On/Off] Status of malfunction indicator lamp detected from malfunctioning indicator lamp
signal is received from ECM via CAN communication.
GLOW IND
[Off] This item is displayed, but cannot be monitored.
CRUISE IND
[On/Off]  Status of CRUISE indicator detected from ASCD status signal is received from
ECM via CAN communicat ion. (ASCD models)
 Status of CRUISE indicator de tected from meter display signal is received from
ADAS control unit via CAN communication. (ICC models)
SET IND
[On/Off] Status of SET indicator detected from meter display signal is received from ADAS
control unit via CAN communication.
CRUISE W/L
[On/Off] Status of CRUISE warning lamp
judged from ICC warning lamp signal received
from ADAS control unit with CAN communication line.
BA W/L
[On/Off] Status of IBA OFF indicator lamp judged from IBA OFF indicator lamp signal re-
ceived from ADAS control unit with CAN communication line.
ATC/T-AMT W/L
[On/Off] Status of A/T CHECK warning lamp judged
from A/T CHECK indicator lamp signal
received from TCM with CAN communication line.
ATF TEMP W/L
[Off] This item is displayed, but cannot be monitored.
4WD W/L
[On/Off] Status of 4WD warning lamp judged from 4WD warning lamp signal received from
4WD control unit with
CAN communication line.
FUEL W/L
[On/Off] Low-fuel warning lamp status detected by the identified fuel level.
WASHER W/L
[On/Off] Status of low washer fluid warning judged from washer level switch input to com-
bination meter.
Display item [Unit]
MAIN
SIGNALS Description
Revision: 2010 May2011 QX56

MWI
COMBINATION METERMWI-43
< ECU DIAGNOSIS INFORMATION >
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DTC IndexINFOID:0000000006221723
Warning lamp/indicator lamp ABS warning lamp
The lamp turns ON by suspending communication.
VDC warning lamp
Brake warning lamp
IBA OFF indicator lamp
4WD warning lamp
Malfunction indicator lamp
VDC OFF indicator lamp
CRUISE warning lamp
Low tire pressure warning lamp The lamp blinking caused by suspending communication.
High beam indicator lamp
The lamp turns OFF by suspending communication.
Turn signal indicator lamp
Tail lamp indicator lamp
A/T CHECK indicator lamp
Key warning lamp
AT P w a r n i n g l a m p
Lane departure warning lamp
LDP ON indicator lamp
CRUISE indicator lamp
Oil pressure warning lamp
SNOW mode indicator lamp
TOW mode indicator lamp
CK SUSP indicator lamp
BSW indicator lamp
Function Specifications
Display contents of CONSULT-III Diagnostic item is detected when... Refer to
CAN COMM CIRCUIT
[U1000] When combination meter is not transmitting or receiving CAN communication signal
for 2 seconds or more. MWI-59,
"Diagnosis
Procedure"
CONTROL UNIT (CAN)
[U1010]
When detecting error during the initial diagnosis of the CAN controller of combina-
tion meter. MWI-60, "Diagnosis
Procedure"
VEHICLE SPEED
[B2205]
The abnormal vehicle speed signal is input from the ABS actuator and electric unit
(control unit) for
2 seconds or more. MWI-61, "Diagnosis
Procedure"
ENGINE SPEED
[B2267]
If ECM continuously transmits abnormal engine speed signals for 2 seconds or
more. MWI-62, "Diagnosis
Procedure"
WATER TEMP
[B2268]
If ECM continuously transmits abnormal engine coolant temperature signals for 60
seconds or more. MWI-63, "Diagnosis
Procedure"
Revision: 2010 May2011 QX56