2007 INFINITI QX56 high beam

ACS-1
ELECTRICAL
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SECTION ACS
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CONTENTS
AUTO CRUISE CONTROL SYSTEM
ASCD
SERVICE INFORMATION ............................
3
AUTOMATIC SPEED CONTROL DEVICE
(ASCD) ................................................................
3
Description ................................................................3
ICC
SERVICE INFORMATION ............................
4
PRECAUTIONS ...................................................4
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
4
Precaution for ICC System Service ...........................4
PREPARATION ...................................................5
Special Service Tool .................................................5
DESCRIPTION ....................................................6
Outline .......................................................................6
Schematic .................................................................6
Component Description .............................................7
CAN Communication .................................................7
Switch Operation .......................................................7
ICC System Display ..................................................8
ACTION TEST .....................................................9
ICC System Running Test .........................................9
LASER BEAM AIMING ADJUSTMENT .............12
Outline of Laser Beam Aiming Adjustment Proce-
dure .........................................................................
12
Preparation ..............................................................12
Setting up the ICC Target Board .............................12
Sensor Adjustment ..................................................14
ELECTRICAL UNITS LOCATION ......................18
Component Parts and Harness Connector Loca-
tion ..........................................................................
18
WIRING DIAGRAM ...........................................19
Schematic ................................................................19
Wiring Diagram - ICC - ............................................20
TERMINALS AND REFERENCE VALUE .........24
Terminal and Reference Value for ICC Unit ............24
Terminal and Reference Value for ICC Sensor .......24
TROUBLE DIAGNOSIS — GENERAL DE-
SCRIPTION .......................................................
25
Work Flow ................................................................25
CONSULT-II Function (ICC) ....................................25
Self-Diagnostic Function ..........................................30
TROUBLE DIAGNOSIS FOR SELF-DIAG-
NOSTIC ITEMS .................................................
34
Diagnostic Trouble Code (DTC) Chart ....................34
DTC 11 CONTROL UNIT ........................................36
DTC 12 VDC CONTROL UNIT ................................36
DTC 20 CAN COMM CIRCUIT ................................37
DTC 31 POWER SUPPLY CIR1, DTC 34 POWER
SUPPLY CIR2 .........................................................
37
DTC 41 VHCL SPEED SE CIRC .............................38
DTC 43 VDC/TCS/ABS CIRC .................................38
DTC 45 BRAKE SW/STOP L SW ............................38
DTC 46 OPERATION SW CIRC .............................40
DTC 74 LASER BEAM OFF CNTR .........................41
DTC 90 STOP LAMP RLY FIX ................................41
DTC 92 ECM CIRCUIT ............................................45
DTC 96 NP RANGE ................................................45
DTC 97 AT CIRCUIT ...............................................46
DTC 98 GEAR POSITION .......................................46
DTC 102 LASER STAIN ..........................................47
DTC 103 LASER SENSOR FAIL .............................47
DTC 104 LASER AIMING INCMP ...........................48
DTC 107 LASER COMM FAIL ................................48
DTC 109 LASER HIGH TEMP ................................48
TROUBLE DIAGNOSIS FOR SYMPTOMS ......49
Symptom Chart ........................................................49

ACS-36
< SERVICE INFORMATION >[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
NOTE: DTC 55 will display when no malfunction is detected.
DTC 11 CONTROL UNITINFOID:0000000003533795
1.DIAGNOSTIC CHECK
Are any items other than “DTC 11 CONTROL UNIT” indicated on self-diagnosis display?
YES or NO
YES >> Repair or replace as necessary. Erase DTC and perform ICC system running test. Refer to ACS-
9, "ICC System Running Test" . Then perform self-diagnosis of ICC system again.
NO >> Replace ICC unit. Refer to ACS-55
. Erase DTC and perform ICC system running test. Refer to
ACS-9, "
ICC System Running Test". Then perform self-diagnosis of ICC system again.
DTC 12 VDC CONTROL UNITINFOID:0000000003533796
1.DIAGNOSIS CHECK
With CONSULT-II
Perform self-diagnosis of ABS actuator and electric unit (control unit). Is malfunction indicated?
YES or NO
YES >> Repair or replace as necessary. Erase DTC and perform ICC system running test. Refer to ACS-
9, "ICC System Running Test". Then perform self-diagnosis of ICC system again.
NO >> GO TO 2.
2.CHECK CONNECTOR ICC UNIT AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
1. Turn ignition switch OFF.
2. Disconnect ICC unit, and ABS actuator and electric unit (control unit) connectors, and connect them
securely again. Erase DTC, then perform self-diagnosis of ICC system again.
OK or NG
OK >> Poor connector connection. Check connector housing for disconnected, loose, bent and collapsed
terminals. If any malfunction is detected, repair as necessary. Erase DTC and perform ICC sys-
tem running test. Refer to ACS-9, "
ICC System Running Test". Then perform self-diagnosis of ICC
system again.
NG >> GO TO 3.
3.CHECK HARNESS BETWEEN ICC UNIT AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
104 LASER AIMING INCMP×× ×• Laser beam aiming of ICC sensor
is not adjustedACS-48,
"DTC 104
LASER
AIMING
INCMP"
107 LASER COMM FAIL×× ×• CAN data received by ICC sensor
is strange (from ICC unit, combi-
nation meter or ECM)ACS-48,
"DTC 107
LASER
COMM
FA IL"
109 LASER HIGH TEMP×× ×• Temperature around ICC sensor
is excessively highACS-48,
"DTC 109
LASER
HIGH
TEMP"
DTC
No.CONSULT-II screen termsICC sys-
tem
warning
lampFail-safe
Malfunctions detected where...Refer-
ence
page Vehicle-
to-vehi-
cle dis-
tance
control
modeConven-
tional
(fixed
speed)
cruise
control
modeBrake as-
sist (with
preview
function)

ACS-48
< SERVICE INFORMATION >[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Are “DTC 11 CONTROL UNIT” or “DTC 20 CAN COMM CIRCUIT” item indicated in self-diagnosis display
item?
YES or NO
YES >> GO TO applicable item inspection. Refer to ACS-36, "DTC 11 CONTROL UNIT", and ACS-37,
"DTC 20 CAN COMM CIRCUIT".
NO >> • Replace ICC sensor and adjust laser beam aiming. Refer to ACS-55, "
ICC Sensor".
• Erase DTC and perform ICC system running test. Refer to ACS-9, "
ICC System Running Test".
Then perform self-diagnosis of ICC system again.
DTC 104 LASER AIMING INCMPINFOID:0000000003533811
1.DIAGNOSTIC CHECK
1. Adjust laser beam aiming. Refer to ACS-12
. Erase DTC and perform ICC system running test. Refer to
ACS-9, "
ICC System Running Test".
2. Perform self-diagnosis of ICC system. Is “DTC 104 LASER AIMING INCMP” indicated?
CAUTION:
Ensure that laser beam aiming apparatus is set up accurately.
YES or NO
YES >> • Replace ICC sensor and adjust laser beam aiming. Refer to ACS-55, "ICC Sensor".
• Erase DTC and perform ICC system running test. Refer to ACS-9, "
ICC System Running Test".
Then perform self-diagnosis of ICC system again.
NO >> Inspection end.
DTC 107 LASER COMM FAILINFOID:0000000003533812
1.DIAGNOSTIC CHECK
Is “DTC 11 CONTROL UNIT” or “DTC 20 CAN COMM CIRCUIT” indicated in the self-diagnosis display item?
YES or NO
YES >> GO TO applicable item inspection. Refer to ACS-36, "DTC 11 CONTROL UNIT" , or ACS-37,
"DTC 20 CAN COMM CIRCUIT".
NO >> • Replace ICC sensor and adjust laser beam aiming. Refer to ACS-55, "
ICC Sensor".
• Erase DTC and perform ICC system running test. Refer to ACS-9, "
ICC System Running Test".
Then perform self-diagnosis of ICC system again.
DTC 109 LASER HIGH TEMPINFOID:0000000003533813
1.CHECK SYMPTOM
Is cooling system malfunctioning?
YES or NO
YES >> • Repair cooling system.
• Erase DTC and perform ICC system running test. Refer to ACS-9, "
ICC System Running Test".
Then perform self-diagnosis of ICC system again.
NO >> • Replace ICC sensor and adjust laser beam aiming. Refer to ACS-55, "
ICC Sensor".
• Erase DTC, then perform ICC system running test. Refer to ACS-9, "
ICC System Running Test".
Then perform self-diagnosis of ICC system again.

BL-70
< SERVICE INFORMATION >
VEHICLE SECURITY (THEFT WARNING) SYSTEM
CONSULT-II Function (BCM)
INFOID:0000000003532945
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II START PROCEDURE
Refer to GI-36, "CONSULT-II Start Procedure".
CONSULT-II APPLICATION ITEM
Data Monitor
Active Test
Work Support
BCM
diagnostic test itemDiagnostic mode Description
Inspection by partWORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the
BCM for setting the status suitable for required operation, input/output sig-
nals are received from the BCM and received date is displayed.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TESTOperation of electrical loads can be checked by sending drive signal to
them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTRThe result of transmit/receive diagnosis of CAN communication can be
read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.
Monitored Item Description
DOOR SW-AS Indicates [ON/OFF] condition of front door switch RH.
DOOR SW-RR Indicates [ON/OFF] condition of rear door switch RH.
DOOR SW-RL Indicates [ON/OFF] condition of rear door switch LH.
DOOR SW-DR Indicates [ON/OFF] condition of front door switch LH.
BACK DOOR SW Indicates [ON/OFF] condition of back door latch.
TRNK OPN MNTR Indicates [ON/OFF] condition of glass hatch ajar switch.
ACC ON SW Indicates [ON/OFF] condition of ignition switch in ACC position.
IGN ON SW Indicates [ON/OFF] condition of ignition switch in ON position.
KEYLESS UNLOCK Indicates [ON/OFF] condition of unlock signal from keyfob.
KEYLESS LOCK Indicates [ON/OFF] condition of lock signal from keyfob.
KEY CYL LK-SW Indicates [ON/OFF] condition of lock signal from door key cylinder switch.
KEY CYL UN-SW Indicates [ON/OFF] condition of unlock signal from door key cylinder switch.
KEYLESS PBD Indicates [ON/OFF] condition of unlock signal from door key cylinder switch.
CDL UNLOCK SW Indicates [ON/OFF] condition of unlock signal from lock/unlock switch.
CDL LOCK SW Indicates [ON/OFF] condition of lock signal from lock/unlock switch.
HOOD SW Indicates [ON/OFF] condition of hood switch.
Test Item Description
THEFT INDThis test is able to check security indicator lamp operation. The lamp will be turned on when “ON”
on CONSULT-II screen is touched.
HEADLAMP (HI)This test is able to check vehicle security lamp operation. The high beam headlamps will be acti-
vated for 0.5 seconds after “ON” on CONSULT-II screen is touched.
VEHICLE SECURITY HORNThis test is able to check vehicle security horn operation. The horns will be activated for 0.5 sec-
onds after “ON” on CONSULT-II screen is touched.

BL-168
< SERVICE INFORMATION >
BODY REPAIR
• When straightening body panels, use caution in pulling any
HSS panel. Because HSS is very strong, pulling may cause
deformation in adjacent portions of the body. In this case,
increase the number of measuring points, and carefully pull
the HSS panel.
• When cutting HSS panels, avoid gas (torch) cutting if possible.
Instead, use a saw to avoid weakening surrounding areas due
to heat. If gas (torch) cutting is unavoidable, allow a minimum
margin of 50 mm (1.97in).
• When welding HSS panels, use spot welding whenever possi-
ble in order to minimize weakening surrounding areas due to
heat.
If spot welding is impossible, use M.I.G. welding. Do not use
gas (torch) welding because it is inferior in welding strength.
• The spot weld on HSS panels is harder than that of an ordi-
nary steel panel.
Therefore, when cutting spot welds on a HSS panel, use a low
speed high torque drill (1,000 to 1,200 rpm) to increase drill bit
durability and facilitate the operation.
• SP150 HSS panels with a tensile strength of 785 to 981 N/
mm
2 (80 to 100 kg/mm2 , 114 to 142 klb/sq in), used as rein-
forcement in the door guard beams, is too strong to repair.
When these HSS parts are damaged, the outer panels also
sustain substantial damage; therefore, the assembly parts
must be replaced.
PIIA0116E
PIIA0117E
PIIA0144E
PIIA0145E

IDX-5
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ALPHABETICAL INDEX
Grease .............................................................. MA-11
Ground distribution ............................................ PG-31
H
H/AIM - Wiring diagram ...................................... LT-51
H/LAMP - Wiring diagram .................................... LT-9
Handling precautions for plastics ..................... BL-179
Harness connector ............................................ PG-68
Harness layout .................................................. PG-41
Hazard warning lamp ......................................... LT-63
Headlamp ............................................................. LT-5
Headlamp aiming control ................................... LT-51
Headlamp leveler - See Headlamp aiming control . LT-
51
Headlamp removal and installation .................... LT-25
Heated oxygen sensor 2 (bank 1) .... EC-276, EC-287,
EC-300
Heated oxygen sensor 2 (bank 2) .... EC-276, EC-287,
EC-300
Heated oxygen sensor 2 heater (bank 1) ........ EC-181
Heated oxygen sensor 2 heater (bank 2) ........ EC-181
Heated seat ....................................................... SE-82
Heater and cooling unit (Heater core) . ATC-157, ATC-
160
Heater unit (heater core) ............... ATC-157, ATC-160
Height (Dimensions) ........................................... GI-51
HFC134a (R134a) system identification ........... ATC-6
HFC134a (R134a) system precaution ............... ATC-5
HFC134a (R134a) system service procedure ATC-175
HFC134a (R134a) system service tools ......... ATC-14
HFC134a system service equipment precaution ATC-
11
High and low reverse clutch solenoid valve .... AT-147,
AT-149
Homelink universal transceiver ........................ BL-146
Horn ................................................................ WW-48
HORN - Wiring diagram .................................. WW-48
How to erase DTC for OBD system .................. EC-63
HSEAT - Wiring diagram ................................... SE-84
I
IATS - Wiring diagram ..................................... EC-215
ICC - Wiring diagram ....................................... ACS-20
ICC/BS - Wiring diagram ................................. EC-565
ICC/SW - Wiring diagram ................................ EC-550
ICCBOF - Wiring diagram ............................... EC-672
Identification plate .............................................. GI-49
Idle air volume learning ..................................... EC-80
Idle speed .............................................. EC-73, EC-78
Idle speed control (ISC) .................... EC-466, EC-468
Ignition coil .......................................... EM-28, EC-679
Ignition control system .................................... EC-679
Ignition key hole illumination ............................ LT-110
Ignition timing ........................................ EC-73, EC-78
IGNSYS - Wiring diagram ............................... EC-680
ILL - Wiring diagram ......................................... LT-136
Illumination ....................................................... LT-130
In vehicle sensor ........................... ATC-141, ATC-150
In-cabin Microfilter ............................................. MA-21
INJECT - Wiring diagram ................................. EC-660
Injector ............................................................. EC-659
Input clutch solenoid valve ................. AT-135, AT-137
Instrument panel .................................................. IP-10
Intake air temperature sensor ............ EC-214, EC-234
Intake door control linkage adjustment . ATC-85, ATC-
88
Intake door motor ........................... ATC-83, ATC-164
Intake manifold .................................................. EM-17
Intake sensor ................................ ATC-146, ATC-152
Intake valve timing control (Bank 1) ................ EC-161
Intake valve timing control (Bank 2) ................ EC-161
Intake valve timing control position sensor (Bank 1) ....
EC-492
Intake valve timing control position sensor (Bank 2) ....
EC-492
Intake valve timing control solenoid valve (Bank 1) EC-
189
Intake valve timing control solenoid valve (Bank 2) EC-
189
Integrated homelink transmitter - See Homelink univer-
sal tranceiver .................................................... BL-146
Intelligent cruise control (ICC) system ............... ACS-6
Interior ................................................................. EI-35
Interior lamp ...................................................... LT-110
Interior lamp on-off control ................................ LT-111
Internal gear (Transfer) ....................... TF-149, TF-176
IPDM (Intelligent power distribution module engine
room) ................................................................. PG-18
IVCB1 - Wiring diagram ................................... EC-190
IVCB2 - Wiring diagram ................................... EC-192
IVCSB1 - Wiring diagram ................................ EC-493
IVCSB2 - Wiring diagram ................................ EC-495
IVIS (Infiniti vehicle immobilizer system) .......... BL-127
IVIS (Infiniti vehicle immobilizer system) precautions ...
GI-3
IVTB1 - Wiring diagram ................................... EC-164
IVTB2 - Wiring diagram ................................... EC-166
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Jacking points ..................................................... GI-42
Junction box (J/B) .............................................. PG-76
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Key illumination ................................................ LT-111
KEYLES - Wiring diagram .................................. BL-45
Knock sensor (KS) ........................................... EC-357
KS - Wiring diagram ........................................ EC-358
L
Laser beam aiming adjustment ....................... ACS-12
Length (Dimensions) .......................................... GI-51
License lamp ...................................................... LT-89
Lifting points ....................................................... GI-43

TROUBLE DIAGNOSIS
LAN-45
< SERVICE INFORMATION >[CAN]
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Engine speed signal T R R R R R R
Engine status signal T R
Fuel consumption monitor signalTR
RT
ICC steering switch signal T R
Malfunction indicator lamp signal T R
Wide open throttle position signal T R
A/T CHECK indicator lamp signal T R
A/T fluid temperature sensor signal T R
A/T position indicator lamp signal T R R
A/T self-diagnosis signal R T
Current gear position signal T R R
Output shaft revolution signal R T R
P range signal T R R R R
Turbine revolution signal R T R
ICC sensor signal T R
Buzzer output signalTR
TR
ICC OD cancel request signal R R T
ICC operation signal R R T
ICC system display signal T R
System setting signalTR
RT
A/C switch signal R T R
Blower fan motor switch signal R T
Day time running light request signal T R R
Door switch signal R T R R R
Front fog light request signal T R
Front wiper request signal R T R
High beam request signal T R R
Horn chirp signal T R
Ignition switch signal R T R
Key fob door unlock signal R T
Key fob ID signal R T
Key switch signal R T
Low beam request signal T R
Position light request signal T R R
Rear window defogger switch signal T R R
Sleep wake up signal R T R R
Theft warning horn request signal T R
Tire pressure data signal T R
Tire pressure signal T R R
Turn indicator signal T RSignal name/Connecting unit
ECM
TCM
LASER
ICC
ADP
BCM
DISP
HVAC
M&A
STRG
ABS
IPDM-E

LAN-46
< SERVICE INFORMATION >[CAN]
TROUBLE DIAGNOSIS
NOTE:
CAN data of the air bag diagnosis sensor unit is not used by usual service work, thus it is omitted.
TYPE 3/TYPE 4
NOTE:
Refer to LAN-37, "
Abbreviation List" for the abbreviations of the connecting units.
T: Transmit R: Receive
A/C switch/indicator signalTR
RT
1st position switch signal R T
4th position switch signal R T
Distance to empty signal R T
Fuel level low warning signal R T
Fuel level sensor signal R T
Parking brake switch signal R T
Stop lamp switch signal R T
Tow mode switch signal R T
Vehicle speed signalRR T
RRR RRR T
Steering angle sensor signalTR
ABS malfunction signal R T
ABS warning lamp signalRT
Brake pressure sensor signal R T
Brake warning lamp signalRT
SLIP indicator lamp signalRT
TCS malfunction signal R T
VDC malfunction signal R T
VDC OFF indicator lamp signal R R T
VDC operation signal R T
Front wiper stop position signal R T
High beam status signal RT
Hood switch signal R T
Low beam status signal RT
Rear window defogger control signal R R TSignal name/Connecting unit
ECM
TCM
LASER
ICC
ADP
BCM
DISP
HVAC
M&A
STRG
ABS
IPDM-E
Signal name/Connecting unitECM
TCM
LASER
ICC
ADP
BCM
DISP
HVAC
M&A
STRG
4WD
ABS
IPDM-E
A/C compressor request signal TR
Accelerator pedal position signal T R R R R
ASCD CRUISE lamp signal T R
ASCD OD cancel request signal T R
ASCD operation signal T R
ASCD SET lamp signal T R
Battery voltage signal T R
Closed throttle position signal T R R