2011 INFINITI QX56 low beam

BCS-8
< SYSTEM DESCRIPTION >
SYSTEM
NOTE:
Headlamp has a dual system switch.
COMBINATION SWITCH READING FUNCTION
Description
 BCM reads the status of the combination switch at 10 ms interval normally.NOTE:
BCM reads the status of the combination switch at 60 ms interval when BCM is controlled at low power con-
sumption control mode.
 BCM operates as follows and judges the status of the combination switch.
- It operates the transistor on OUTPUT side in the following order: OUTPUT 1 → 2 → 3 → 4 → 5, and outputs
voltage waveform.
- The voltage waveform of OUTPUT corresponding to the formed circuit is input into the interface on INPUT
side if any (1 or more) switches are ON.
- It reads this change of the voltage as the status signal of the combination switch.
Operation Example
In the following operation example, the combination of t he status signals of the combination switch is replaced
as follows: INPUT 1 - 5 to “1 - 5” and OUTPUT 1 - 5 to “A - E”.
Example 1: When a switch (TAIL LAMP switch) is turned ON
OUTPUT 3 WIP VOLUME 1 RR WASHER — HEADLAMP 2 HI BEAM
OUTPUT 4 RR WIPER INT WIP VOLUME 3 AUTO LIGHT — TAIL LAMP
OUTPUT 5 WIP VOLUME 2 RR WIPER ON RR FOG FR FOG — System INPUT 1 INPUT 2 INPUT 3 INPUT 4 INPUT 5
JPMIA0609GB
JMMIA0326GB
Revision: 2010 May2011 QX56

BCS
DIAGNOSIS SYSTEM (BCM)BCS-21
< SYSTEM DESCRIPTION >
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ACTIVE TEST
*: Only models for Canada display this item.
WIPER
WIPER : CONSULT-III Function (BCM - WIPER)INFOID:0000000006376469
WORK SUPPORT
DOOR SW-DR
[On/Off]
The switch status input from front door switch (driver side)
DOOR SW-AS
[On/Off] The switch status input from front door switch (passenger side)
DOOR SW-RR
[On/Off] The switch status input from rear door switch RH
DOOR SW- RL
[On/Off] The switch status input from rear door switch LH
DOOR SW-BK
[On/Off] The switch status input from back door switch
OPTICAL SENSOR
[On/Off] The sensor status input from optical sensor
OPTI SEN (DTCT)
[V] The value of outside brightness voltage input from the optical sensor
OPTI SEN (FILT)
[V] The value of outside brightness voltage filtered by BCM
Monitor item
[Unit] Description
Test item Operation Description
TAIL LAMP On
Transmits the position light request signal to IPDM E/R via CAN commu-
nication to turn the tail lamp ON
Off Stops the tail lamp request signal transmission
HEAD LAMP Hi
Transmits the high beam request signal via CAN communication to turn
the headlamp (HI)
Lo Transmits the low beam request signal via CAN communication to turn
the headlamp (LO)
Off Stops the high & low beam request signal transmission
FR FOG LAMP On
Transmits the front fog lights request signal to IPDM E/R via CAN com-
munication to turn the front fog lamp ON
Off Stops the front light request signal transmission
RR FOG LAMP On
NOTE:
This item is indicated, but can not tested
Off
DAYTIME RUNNING LIGHT* On
Transmits the front fog lights request signal to IPDM E/R via CAN com-
munication to turn the front fog lamp ON (daytime running light system)
Off Stops the front light request signal transmission (daytime running light
system)
ILL DIM SIGNAL On Transmits the dimmer signal to combination meter via CAN communi-
cation and dims combination meter
 Transmits the dimmer signal to AV control unit and dims display
Off Stops the dimmer signal transmission
Revision: 2010 May2011 QX56

BCS
BCM
BCS-33
< ECU DIAGNOSIS INFORMATION >
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ECU DIAGNOSIS INFORMATION
BCM
Reference ValueINFOID:0000000006274819
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III MONITOR ITEM
Monitor Item Condition Value/Status
FR WIPER HI Other than front wiper switch HI Off
Front wiper switch HI On
FR WIPER LOW Other than front wiper switch LO Off
Front wiper switch LO On
FR WASHER SW Front washer switch OFF Off
Front washer switch ON On
FR WIPER INT Other than front wiper switch AUTO Off
Front wiper switch AUTO On
FR WIPER STOP Front wiper is not in STOP position Off
Front wiper is in STOP position On
INT VOLUME Wiper volume dial is in a dial position 1 - 7 Wiper volume dial po-
sition
RR WIPER ON Other than rear wiper switch ON Off
Rear wiper switch ON On
RR WIPER INT Other than rear wiper switch INT Off
Rear wiper switch INT On
RR WASHER SW Rear washer switch OFF Off
Rear washer switch ON On
RR WIPER STOP Rear wiper is in STOP position Off
Rear wiper is not in STOP position On
TURN SIGNAL R Other than turn signal switch RH Off
Turn signal switch RH On
TURN SIGNAL L Other than turn signal switch LH Off
Turn signal switch LH On
TA I L L A M P S W Other than lighting switch 1ST and 2ND Off
Lighting switch 1ST or 2ND On
HI BEAM SW Other than lighting switch HI Off
Lighting switch HI On
HEAD LAMP SW 1 Other than lighting switch 2ND Off
Lighting switch 2ND On
HEAD LAMP SW 2 Other than lighting switch 2ND Off
Lighting switch 2ND On
PASSING SW Other than lighting switch PASS Off
Lighting switch PASS On
AUTO LIGHT SW Other than lighting switch AUTO Off
Lighting switch AUTO On
FR FOG SW Front fog lamp switch OFF Off
Front fog lamp switch ON On
Revision: 2010 May2011 QX56

BCS-80
< SYMPTOM DIAGNOSIS >
COMBINATION SWITCH SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
COMBINATION SWITCH SYSTEM SYMPTOMS
Symptom TableINFOID:0000000006274844
1. Perform “Data Monitor” of CONSULT-II I to check for any malfunctioning item.
2. Check the malfunction combinations.
Malfunction item: ×
3. Identify the malfunctioning part from the agreed combination and repair or replace the part.
Data monitor item
Malfunc-
tion com-
bination
FR WIPER HI
FR WIPER LOW
FR WASHER SW
FR WIPER INT
RR WIPER ON
RR WIPER INT
RR WASHER SW INT VOLUME
TURN SIGNAL R TURN SIGNAL L TAIL LAMP SW
HI BEAM SW
HEAD LAMP SW 1
HEAD LAMP SW 2 PASSING SW
AUTO LIGHT SW
FR FOG SW
×× ×× A
×× ×× B
×× × × C
×× × × D
×× × E
××× F
×××× G
×× ×H
×××× I
× ××× J
All Items K
If only one item is detected or the item is not applicable to the combinations A to K L
Malfunction
combination Malfunctioning part Repair or replace
A Combination switch OUTPUT 1 circuit
Inspect the combination switch output circuit applicable to the malfunction-
ing part. Refer to BCS-76, "
Diagnosis Procedure".
B Combination switch OUTPUT 2 circuit
C Combination switch OUTPUT 3 circuit
D Combination switch OUTPUT 4 circuit E Combination switch OUTPUT 5 circuitF Combination switch INPUT 1 circuit
Inspect the combination switch input circuit applicable to the malfunctioning
part. Refer to BCS-78, "
Diagnosis Procedure".
G Combination switch INPUT 2 circuit
H Combination switch INPUT 3 circuit I Combination switch INPUT 4 circuit
J Combination switch INPUT 5 circuit
K BCM Replace BCM. Refer to BCS-81, "
Removal and Installation".
L Combination switch Replace combination switch.
Revision: 2010 May2011 QX56

CCS-2
WIRING DIAGRAM .....................................57
INTELLIGENT CRUISE CONTROL ............... ...57
Wiring Diagram .................................................... ...57
BASIC INSPECTION ...................................69
DIAGNOSIS AND REPAIR WORK FLOW ..... ...69
Work Flow ............................................................ ...69
ADDITIONAL SERVICE WHEN REPLACING
ICC SENSOR .....................................................
71
Description ........................................................... ...71
Work Procedure ......................................................71
LASER BEAM AIMING ADJUSTMENT ............72
Description ........................................................... ...72
Work Procedure (Preparation) ................................72
Work Procedure (Setting The ICC Target Board) ...72
Work Procedure (Laser Beam Aiming Adjustment)
...
75
ACTION TEST ...................................................77
Description ........................................................... ...77
Work Procedure (Vehicle-To-Vehicle Distance
Control Mode) .........................................................
77
Work Procedure [Conventional (Fixed Speed)
Cruise Control Mode] ..............................................
80
DTC/CIRCUIT DIAGNOSIS ...................... ...83
C1A00 CONTROL UNIT ................................. ...83
ADAS CONTROL UNIT ......................................... ...83
ADAS CONTROL UNIT : DTC Logic ......................83
ADAS CONTROL UNIT : Diagnosis Procedure ......83
ICC SENSOR ......................................................... ...83
ICC SENSOR : DTC Logic .....................................83
ICC SENSOR : Diagnosis Procedure .....................83
C1A01 POWER SUPPLY CIRCUIT 1, C1A02
POWER SUPPLY CIRCUIT 2 ............................
85
ADAS CONTROL UNIT ......................................... ...85
ADAS CONTROL UNIT : DTC Logic ......................85
ADAS CONTROL UNIT : Diagnosis Procedure ......85
ICC SENSOR ......................................................... ...85
ICC SENSOR : DTC Logic .....................................85
ICC SENSOR : Diagnosis Procedure .....................86
C1A03 VEHICLE SPEED SENSOR ..................87
DTC Logic ............................................................ ...87
Diagnosis Procedure ..............................................87
C1A04 ABS/TCS/VDC SYSTEM .......................89
DTC Logic ............................................................ ...89
Diagnosis Procedure ..............................................89
C1A05 BRAKE SW/STOP LAMP SW ...............90
DTC Logic ............................................................ ...90
Diagnosis Procedure ..............................................90
Component Inspection (ICC Brake Switch) ......... ...93
Component Inspection (Stop Lamp Switch) ............93
C1A06 OPERATION SW ...................................94
DTC Logic ............................................................ ...94
Diagnosis Procedure ...............................................94
Component Inspection ............................................95
C1A12 LASER BEAM OFF CENTER ...............96
ADAS CONTROL UNIT .......................................... ...96
ADAS CONTROL UNIT : DTC Logic ......................96
ADAS CONTROL UNIT : Diagnosis Procedure ......96
ICC SENSOR .......................................................... ...96
ICC SENSOR : DTC Logic ......................................96
ICC SENSOR : Diagnosis Procedure .....................96
C1A13 STOP LAMP RELAY .............................97
DTC Logic ............................................................ ...97
Diagnosis Procedure ...............................................97
Component Inspection ..........................................102
C1A14 ECM ......................................................103
DTC Logic ............................................................ .103
Diagnosis Procedure .............................................103
C1A15 GEAR POSITION .................................104
Description ........................................................... .104
DTC Logic .............................................................104
Diagnosis Procedure .............................................104
C1A16 RADAR STAIN ................................... ..106
ADAS CONTROL UNIT .......................................... .106
ADAS CONTROL UNIT : DTC Logic ....................106
ADAS CONTROL UNIT : Diagnosis Procedure ....106
ICC SENSOR .......................................................... .106
ICC SENSOR : DTC Logic ....................................106
ICC SENSOR : Diagnosis Procedure ...................107
C1A17 ICC SENSOR ........................................108
DTC Logic ............................................................ .108
Diagnosis Procedure .............................................108
C1A18 LASER AIMING INCMP .......................109
ADAS CONTROL UNIT .......................................... .109
ADAS CONTROL UNIT : DTC Logic ....................109
ADAS CONTROL UNIT : Diagnosis Procedure ....109
ICC SENSOR .......................................................... .109
ICC SENSOR : DTC Logic ....................................109
ICC SENSOR : Diagnosis Procedure ...................110
C1A21 UNIT HIGH TEMP .................................111
ADAS CONTROL UNIT .......................................... .111
ADAS CONTROL UNIT : DTC Logic ....................111
ADAS CONTROL UNIT : Diagnosis Procedure ....111
ICC SENSOR .......................................................... .111
ICC SENSOR : DTC Logic ....................................111
Revision: 2010 May2011 QX56

CCS
PRECAUTIONSCCS-7
< PRECAUTION > [ICC]
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 Bypass connection is never allowed at the repaired area. NOTE:
Bypass connection may cause ITS communication error. The
spliced wire becomes separated and t he characteristics of twisted
line are lost.
ICC System ServiceINFOID:0000000006224263
CAUTION:
 Never look straight into th e laser beam discharger when adjusting laser beam aiming.
 Turn the MAIN switch OFF in conditions similar to driving, such as free rollers or a chassis dyna-
mometer.
 Never use the ICC sensor removed from vehicle. Never disassemble or remodel.
 Erase DTC when replacing parts of ICC system, then check the operation of ICC system after adjust-
ing laser beam aiming if necessary.
SKIB8767E
Revision: 2010 May2011 QX56

CCS-32
< SYSTEM DESCRIPTION >[ICC]
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

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