2008 INFINITI QX56 service

BRM-54
< SERVICE INFORMATION >
BODY REPAIR
• Weld part to be butt-welded and seam-welded corner to corner as shown in the figure.
LIIA1089E
Revision: March 20102008 QX56

CCS-1
CRUISE CONTROL
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CCS
SECTION CCS
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CONTENTS
CRUISE CONTROL SYSTEM
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
INSPECTION AND ADJUSTMENT .....................5
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT .................................................... ......
5
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Description ..................................
5
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement .......
5
LASER BEAM AIMING ADJUSTMENT ................ ......5
LASER BEAM AIMING ADJUSTMENT : Outline
of Laser Beam Aiming Adjustment Procedure ..........
5
LASER BEAM AIMING ADJUSTMENT : Prepara-
tion ...................................................................... ......
5
LASER BEAM AIMING ADJUSTMENT : Setting
up the ICC Target Board ...........................................
6
LASER BEAM AIMING ADJUSTMENT : Sensor
Adjustment ................................................................
7
ACTION TEST ....................................................... ......8
ACTION TEST : ICC System Running Test ..............8
FUNCTION DIAGNOSIS ..............................12
AUTOMATIC SPEED CONTROL DEVICE
(ASCD) ........................................................... ....
12
System Description ............................................. ....12
INTELLIGENT CRUISE CONTROL SYSTEM ....13
System Diagram .................................................. ....13
System Description .................................................13
Component Parts Location ......................................15
Component Description ...........................................16
DIAGNOSIS SYSTEM (ICC SENSOR INTE-
GRATED UNIT) ..................................................
17
Diagnosis Description ......................................... ....17
CONSULT-III Function (ICC) ............................... ....18
COMPONENT DIAGNOSIS .........................22
DTC 11 CONTROL UNIT ..................................22
DTC 11 CONTROL UNIT .................................... ....22
DTC 12 VDC CONTROL UNIT ..........................23
DTC 12 VDC CONTROL UNIT ................................23
DTC 20 CAN COMM CIRCUIT ..........................24
DTC 20 CAN COMM CIRCUIT ................................24
DTC 31 POWER SUPPLY CIR1, DTC 34
POWER SUPPLY CIR2 .....................................
25
DTC 31 POWER SUPPLY CIR1, DTC 34 POWER
SUPPLY CIR2 .........................................................
25
DTC 41 VHCL SPEED SE CIRC .......................26
DTC 41 VHCL SPEED SE CIRC .............................26
DTC 43 VDC/TCS/ABS CIRC ...........................27
DTC 43 VDC/TCS/ABS CIRC .................................27
DTC 45 BRAKE SW/STOP L SW .....................28
DTC 45 BRAKE SW/STOP L SW ............................28
DTC 46 OPERATION SW CIRC .......................30
DTC 46 OPERATION SW CIRC ......................... ....30
DTC 74 LASER BEAM OFF CNTR ..................31
DTC 74 LASER BEAM OFF CNTR .........................31
DTC 90 STOP LAMP RLY FIX ..........................32
DTC 90 STOP LAMP RLY FIX ................................32
DTC 92 ECM CIRCUIT ......................................37
DTC 92 ECM CIRCUIT ............................................37
DTC 96 NP RANGE ..........................................38
DTC 96 NP RANGE ............................................ ....38
DTC 97 AT CIRCUIT .........................................39
DTC 97 AT CIRCUIT ...............................................39
Revision: March 2010 2008 QX56

CCS-2
DTC 98 GEAR POSITION .................................40
DTC 98 GEAR POSITION ................................... ...40
DTC 102 LASER STAIN ....................................41
DTC 102 LASER STAIN ...................................... ...41
DTC 103 LASER SENSOR FAIL .......................42
DTC 103 LASER SENSOR FAIL ......................... ...42
DTC 104 LASER AIMING INCMP .....................43
DTC 104 LASER AIMING INCMP ....................... ...43
DTC 107 LASER COMM FAIL ..........................44
DTC 107 LASER COMM FAIL ............................ ...44
DTC109 LASER HIGH TEMP ............................45
DTC 109 LASER HIGH TEMP ............................ ...45
ECU DIAGNOSIS ..................................... ...46
ICC UNIT ............................................................46
Terminal and Reference Va lue for ICC Unit ...........46
Wiring Diagram .................................................... ...47
Fail Safe .................................................................54
Diagnostic Trouble Code (DTC) Chart ....................55
SYMPTOM DIAGNOSIS .............................57
INTELLIGENT CRUISE CONTROL SYSTEM
SYMPTOMS .................................................... ...
57
Symptom Chart .................................................... ...57
MAIN SWITCH DOES NOT TURN ON, MAIN
SWITCH DOES NOT TURN OFF ......................
58
Diagnosis Procedure ........................................... ...58
ICC SYSTEM CANNOT BE SET (MAIN
SWITCH TURNS ON/OFF) ................................
59
Diagnosis Procedure ........................................... ...59
ICC STEERING SWITCH (OTHER THAN
MAIN SWITCH) DOES NOT FUNCTION ..........
60
Diagnosis Procedure ........................................... ...60
ICC SYSTEM DOES NOT CANCEL WHEN A/
T SELECTOR LEVER SETS ON "N" ................
61
Diagnosis Procedure ............................................ ...61
CHIME DOES NOT SOUND ..............................62
Diagnosis Procedure ............................................ ...62
DRIVING FORCE IS HUNTING .........................63
Diagnosis Procedure ............................................ ...63
ICC SYSTEM FREQUENTLY CANNOT DE-
TECT THE VEHICLE AHEAD/ DETECTION
ZONE IS SHORT ...............................................
64
Diagnosis Procedure ...............................................64
THE SYSTEM DOES NOT DETECT THE VE-
HICLE AHEAD AT ALL .....................................
65
Diagnosis Procedure ............................................ ...65
NORMAL OPERATING CONDITION ................66
Description ........................................................... ...66
PRECAUTION ............................................68
PRECAUTIONS .............................................. ...68
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
68
ICC System Service ................................................68
PREPARATION ..........................................69
PREPARATION .............................................. ...69
Special Service Tool ............................................ ...69
ON-VEHICLE REPAIR ...............................70
ICC C/U ..............................................................70
ICC Unit ............................................................... ...70
ICC SENSOR INTEGRATED UNIT ...................71
ICC Sensor .......................................................... ...71
ICC STEERING SWITCH ..................................72
Removal and Installation .........................................72
Revision: March 2010 2008 QX56

CCS
DIAGNOSIS AND REPAIR WORKFLOWCCS-3
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000001731799
OVERALL SEQUENCE
• Reference 1··· Refer to CCS-5, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special
Repair Requirement".
• Reference 2··· Refer to CCS-55, "
Diagnostic Trouble Code (DTC) Chart".
• Reference 3··· Refer to CCS-57, "
Symptom Chart".
DETAILED FLOW
1.CHECK SYMPTOM
Check the malfunction symptoms by performing the following items.
• Obtain the malfunction information (conditions and environment when the malfunction occurred) from the customer.
JSOIA0021GB
Revision: March 2010 2008 QX56

CCS-4
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
• Perform the ICC system action test to check the ICC system operation status. Refer to CCS-5, "ADDI-
TIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement".
>> GO TO 2
2.PERFORM SELF-DIAGNOSIS OF ICC UNIT
1. Perform self-diagnosis of ICC unit.
2. Check if DTC is detected.
Is any DTC detected?
YES >> GO TO 3
NO >> GO TO 4
3.CHECK SELF-DIAGNOSIS RESULTS
1. Check the DTC detected in the self-diagnosis results.
2. Perform the relevant diagnosis by re ferring to the DTC index. Refer to CCS-55, "
Diagnostic Trouble Code
(DTC) Chart".
NOTE:
If “CAN COMM CIRCUIT [U1000]” (DTC 20) is displayed, start with the diagnosis for the CAN communication
system. Refer to LAN-85, "
Diagnosis Procedure".
>> GO TO 5
4.DIAGNOSIS BY SYMPTOM
Referring to the diagnosis chart by symptom , perform the relevant diagnosis. Refer to CCS-57, "
Symptom
Chart".
>> GO TO 5
5.REPAIR OR REPLACE APPLICABLE ITEM
Repair or replace applicable item.
>> GO TO 6
6.CHECK AFTER REPAIRING OR REPLACING THE APPLICABLE ITEM
1. Erase DTC.
2. Perform the self-diagnosis for the ICC unit again after repairing or replacing the applicable item.
3. Check if DTC is detected.
Is any DTC detected?
YES >> GO TO 3
NO >> GO TO 7
7.CHECK ICC SYSTEM
Test the ICC system for normal operation to see if the malfunction symptom is solved and no other symptoms
are present.
No symptoms?
YES >> INSPECTION END.
NO >> GO TO 4
Revision: March 2010 2008 QX56

CCS
INSPECTION AND ADJUSTMENTCCS-5
< BASIC INSPECTION >
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INSPECTION AND ADJUSTMENT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPL ACING CONTROL UNIT : Description
INFOID:0000000001731800
Always perform the laser beam aiming adjustment after repl acing the ICC unit. In addition, test the ICC sys-
tem operations to see if it functions normally.
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement
INFOID:0000000001731801
1.LASER BEAM AIMING ADJUSTMENT
Adjust laser beam aiming. Refer to CCS-5, "
LASER BEAM AIMING ADJUSTMENT : Outline of Laser Beam
Aiming Adjustment Procedure".
>> GO TO 2
2.ICC SYSTEM ACTION TEST
1. Perform the ICC system operation test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
2. Check that the ICC system operates normally.
>> INSPECTION END.
LASER BEAM AIMI NG ADJUSTMENT
LASER BEAM AIMING ADJUSTMENT : Outlin e of Laser Beam Aiming Adjustment
Procedure
INFOID:0000000001756724
CAUTION:
• The laser beam aiming adjustment can not be performed without CONSULT-III.
• The laser beam aiming adjustment must be performed every time the ICC sensor is removed,
installed or has been moved as a result of a collision.
1. Prepare the vehicle and the work area.
2. Set up the ICC target board. For details, refer to Technical Service Bulletin.
3. Adjust the sensor following the procedure on CONSULT-III.
4. Check system operation after the adjustment.
LASER BEAM AIMING ADJU STMENT : PreparationINFOID:0000000001756725
• Place the vehicle on level ground. Shift the transmi ssion into "P" position and release the parking brake.
• Adjust the tire pressure to the specified value.
• See that there is no load in the vehicle. Coolant , engine oil and fuel should be filled to correct level.
• Check that the vehicle suspension has been adjusted to the standard height by the load leveling rear air sus-
pension system. Refer to SCS-7, "
CONSULT-III Function" .
• Clean the sensor with a soft cloth. Tool number : KV99110100 (J-45718)
LKIA0632E
Revision: March 2010
2008 QX56

CCS-6
< BASIC INSPECTION >
INSPECTION AND ADJUSTMENT
LASER BEAM AIMING ADJUSTMENT : Setting up the ICC Target Board
INFOID:0000000001756726
CAUTION:
Accuracy in setting up the ICC target board is essential for the laser beam aiming adjustment.
For details, refer to T echnical Service Bulletin.
ADJUSTING HEIGHT OF THE TARGET
1. Attach a triangle scale as shown.
2. Adjust the height of the target stand so that the point of the trian-
gle aims above the center of the ICC sensor.
ADJUSTING THE POSITION OF THE TARGET BOARD STRING
1. Attach a scale or straightedge (at least 350 mm [14 in] orlonger).
2. Suspend a string with a weight on the end 218 mm (8.6 in) to the left side of the target board center.
POSITIONING THE TARGET
1. Suspend a string with weights on each end over the cent erline of the vehicle. The string should lay over
the center of the front and bac k bumpers. Mark these centerpoi nts on the ground at each weight.
WKIA1849E
WKIA2039E
SKIA1211E
WKIA2040E
Revision: March 2010 2008 QX56

CCS-18
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)
ERASING ON BOARD SELF-DIAGNOSIS
1. Stop the vehicle and turn ignition switch OFF.
2. Start engine and start on board self-diagnosis.
3. During on board self-diagnosis, press CANCEL switch 5 times,
and DISTANCE switch 5 times in this order.
NOTE:
• Press them within 10 seconds after pressing CANCEL switch
at first.
• When operation is not completed within 10 seconds, start again from step 2 above.
4. DTC 55 will be shown. NOTE:
DTC of an existing malfunction will not be erased.
5. Turn ignition switch OFF to exit the diagnosis.
CONSULT-III Function (ICC)INFOID:0000000001731814
DESCRIPTION
CONSULT-III can display each diagnostic item us ing the diagnostic test modes shown following.
WORK SUPPORT
Cause of Auto-Cancel Display Item List
×: Applicable
PKIB8373E
Test mode Function
Work Support • Monitors aiming direction to facilitate laser beam aiming operation.
• Indicates causes of automatic cancellation of the ICC system.
Self Diagnostic Result Displays malfunctioning system memorized in ICC sensor integrated unit.
Data Monitor Displays real-time input/output data of ICC sensor integrated unit.
Active Test Enables operation check of electrical loads by sending driving signal to them.
ECU Identification Displays part number of ICC sensor integrated unit.
Work support item Function
CAUSE OF AUTO-CANCEL Indicates causes of automatic cancellation of the ICC system.
LASER BEAM ADJUST Outputs laser beam, calculates dislocation of the beam, and indicates adjustment direction.
For the adjustment procedure, refer to
CCS-5, "
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement".
Cause of cancellationVehicle-to-vehi-
cle distance
control modeConventional
(fixed speed)
cruise control
mode
Description
OPERATING WIPER ×Windshield wipers were operated at HI or LO speed operation.
OPERATING ABS ×ABS function was operated.
OPERATING TCS ××TCS function was operated.
OPERATING VDC ××VDC function was operated.
OPE SW VOLT CIRC ××Outside the standard control switch input voltage was detected.
ECM CIRCUIT ××ECM did not permit ICC operation.
LASER SUN BEAM ×Intense light such as sunlight entered ICC sensor integrated unit
light sensing part.
LASER TEMP ×Temperature around ICC sensor integrated unit became low.
OP SW DOUBLE TOUCH ××ICC steering switches were pressed at the same time.
WHL SPD ELEC NOISE ××Wheel speed sensor signal caught electromagnetic noise.
Revision: March 2010 2008 QX56