display INFINITI QX56 2008 Factory Service Manual

BRC-106
< SYMPTOM DIAGNOSIS >[VDC/TCS/ABS]
ABS FUNCTION DOES NOT OPERATE
ABS FUNCTION DOES NOT OPERATE
Diagnosis ProcedureINFOID:0000000001686378
CAUTION:
ABS does not operate when speed
is 10 km/h (6 MPH) or lower.
1.CHECK ABS WARNING LAMP DISPLAY
Make sure that the ABS warning lamp turns OFF af ter ignition switch is turned ON or when driving.
Is the inspection result normal?
YES >> Normal
NO >> Perform self-diagnosis. Refer to BRC-24, "
CONSULT-III Function (ABS)".
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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-8
< BASIC INSPECTION >
INSPECTION AND ADJUSTMENT
NOTE:
If the adjustment screen does not appear on CONSULT-III 10 sec. after touching “LASER BEAM ADJUST”
screen, the following causes may be considered:
• Target is not set accurately.
• There is not enough space beside the target.
• Deformation of vehicle or inappropriate installation of sensor. Sensor may be installed out of the adjustablerange.
• The area is not suitable for the adjustment work.
• ICC sensor is not clean.
>> GO TO 2
2.LASER BEAM AIMING CONFIRMATION
After the CONSULT-III displays “ADJ UST THE VERTICAL OF LASER BEAM AIMING” turn the vertical adjust-
ing screw until “U/D CORRECT” value is set in the range of ±4.
NOTE:
• Turn the screw slowly. The value on the CONSULT-III is slower
than the actual movement of the ICC sensor. Wait 2 seconds
between each adjustment. Also, during adjustment work, do not
block the ICC sensor lens with your hand or body. In that case,
there are times when aiming cannot be conducted correctly.
• Turning the screw clockwise raises the ICC sensor and counter- clockwise lowers the ICC sensor.
>> GO TO 3
3.LASER BEAM AIMING CONFIRMATION
1. When “U/D CORRECT” value indicates ±4, confirm that the value remains within ±4 for at least 2 seconds
while nothing is touching the ICC sensor.
2. When “COMPLETED THE VERTICAL AIMING OF LASER BEAM” appears on screen, touch “END”.
NOTE:
Be sure that the margin of “U/D CORRECT” is within ±4 when the ICC sensor unit is untouched.
3. Confirm that “ADJUSTING AUTOMATIC HORIZONTAL LASER BEAM AIMING” is on screen and wait
while the horizontal adjustment is made automatically. (maximum: 10 seconds).
4. Confirm that “NORMALLY COMPLETED” is displayed on CONSULT-III and close the aiming adjustment procedure by touching “END”.
NOTE:
Complete all the procedures once “LASER BEAM AD JUST” mode is entered in CONSULT-III. When the
procedure is discontinued, the ICC system is inoperable.
>> LASER BEAM AIMING ADJUSTMENT END.
CHECK AFTER THE ADJUSTMENT
Test the ICC system by performing the ICC System Running Test. Refer to CCS-8, "ACTION TEST : ICC Sys-
tem Running Test" .
ACTION TEST
ACTION TEST : ICC System Running TestINFOID:0000000001756728
VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
SET CHECKING
1. Press the ON/OFF switch for less than 1.5 seconds.
2. Drive the vehicle between 40 km/h (25 MPH) and 144 km/h (89 MPH).
3. Push the COAST/SET switch.
4. Confirm that the desired speed is set as the COAST/SET switch is released.
NOTE:
WKIA1869E
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CCS
INSPECTION AND ADJUSTMENTCCS-9
< BASIC INSPECTION >
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• When there is no vehicle ahead, drive at the set speed steadily.
• When there is a vehicle ahead, control to maintain distance from the vehicle ahead, watching its speed.
• The set vehicle speed is displayed on the ICC system indicator in the combination meter.
CHECK FOR INCREASE OF THE CRUISING SPEED
1. Set vehicle-to-vehicle distance control mode at desired speed.
2. Check if the set speed increases by 1.6 km /h (1 MPH) as ACCEL/RES switch is pushed.
NOTE:
The maximum set speed of the vehicle-to-vehicl e distance control mode is 144 km/h (89 MPH).
CHECK FOR DECREASE OF THE CRUISING SPEED
1. Set vehicle-to-vehicle distance control mode at desired speed.
2. Check if the set speed decreases by 1.6 km /h (1 MPH) as COAST/SET switch is pushed.
NOTE:
• Vehicle-to-vehicle distance control mode is automatica lly turned off when the driving speed lowers to 32 km/
h (20 MPH) due to the deceleration of the vehicle ahead.
• The minimum set speed of the vehicle-to-vehicle distance control mode is 40 km/h (25 MPH).
CHECK FOR THE CANCELLATION OF VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE (NORMAL DRIV-
ING CONDITION) IN THE FOLLOWING CASES:
1. When the brake pedal is depressed after the system is turned on.
2. When the selector lever is shifted to the "N" (Neutral) position.
3. When the system is turned off.
4. When CANCEL switch is operated.
CHECK FOR RESTORING THE SPEED THAT IS SET BY VEHICLE-TO-VEHICLE DI STANCE CONTROL MODE
BEFORE CANCELLATION
1. Cancel the system by depressing the brake. Then, check that the speed before cancellation is restored
when pressing ACCEL/RES switch with vehi cle speed at 40 km/h (25 MPH) or above.
2. Cancel the system by shifting the selector lever to “N”. Then, check if the speed set before the cancella-
tion is restored when ACCEL/RES switch is pressed.
3. Check if the speed previously set is restored w hen ACCEL/RES switch is operated when driving 40 km/h
(25 MPH) or above, after canceling vehicle-to-v ehicle distance control mode by operating the CANCEL
switch.
CHECK ON/OFF SWITCH OPERATION
1. Start the engine. Then, check that the following operations are performed correctly.
2. Vehicle-to-vehicle distance control mode is displayed when ON/ OFF switch is pressed ON. Vehicle-to-vehicle distance control
mode goes off when ON/OFF switch is turned to OFF.
3. Turn off the ignition switch while ON/OFF switch is ON. Turn the ignition switch back to ON and confirm that CRUISE lamp and
ICC system display are OFF.
CHECK FOR ACCEL/RES, COAST/SET, CANCEL SWITCHES
1. Check if ACCEL/RES, COAST/SET, CANCEL sw itches operate smoothly.
2. Check if switch buttons r ebound as the buttons are released.
CHECK FOR DISTANCE SWITCH
1. Start the engine.
2. Press the ON/OFF switch for less than 1.5 seconds.
3. Press the DISTANCE switch.
4. Check if the set distance indicator changes display in order of:
(long) →(middle)→ (short).
NOTE:
ALOIA0012ZZ
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CCS-10
< BASIC INSPECTION >
INSPECTION AND ADJUSTMENT
The set distance indicator shows long immediately after the engine starts.
CONVENTIONAL (FIXED SPEED) CRUISE CONTROL MODE
SET CHECKING
1. Press the ON/OFF switch for more than 1.5 seconds.
2. Drive the vehicle between 40 km/h (25 MPH) and 144 km/h (89 MPH).
3. Push the COAST/SET switch.
4. Confirm that the desired speed is set when the COAST/SET switch is released.
NOTE:
• ICC system display in the combination meter shows nothing.
CHECK FOR INCREASE OF THE CRUISING SPEED
1. Set the conventional (fixed speed) cruise control mode at desired speed.
2. Check if the set speed increases by 1.6 km /h (1 MPH) as ACCEL/RES switch is pushed.
NOTE:
• If the ACCEL/RES switch is held, the vehicl e speed increases until the switch is released.
• The maximum set speed is 144 km/h (89 MPH).
CHECK FOR DECREASE OF THE CRUISING SPEED
1. Set the conventional (fixed speed) cruise control mode at desired speed.
2. Check if the set speed decreases by 1.6 km /h (1 MPH) as COAST/SET switch is pushed.
NOTE:
• Conventional (fixed speed) cruise control mode is autom atically turned off when the driving speed lowers to
32 km/h (20 MPH).
• The lowest set speed is 40 km/h (25 MPH).
CHECK FOR THE CANCELLATION OF CONVENTIONAL (FIXED SPEED) CRUISE CO NTROL MODE (NORMAL
DRIVING CONDITION) IN THE FOLLOWING CASES:
Refer to "CHECK FOR THE CANCELLATION OF VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
(NORMAL DRIVING CONDITION) IN THE FOLLOWING CASES:" .
CHECK FOR RESTORING THE SPEED TH AT IS SET BY CONVENTIONAL (FIXED SPEED) CRUISE CONTROL
MODE BEFORE ICC CANCELLATION
Refer to "CHECK FOR RESTORING THE SPEED THAT IS SET BY VEHICLE-TO-VEHICLE DISTANCE
CONTROL MODE BEFORE CANCELLATION" .
CHECK ON/OFF SWITCH OPERATION
SKIA6178E
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CCS
INTELLIGENT CRUISE CONTROL SYSTEMCCS-13
< FUNCTION DIAGNOSIS >
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INTELLIGENT CRUISE CONTROL SYSTEM
System DiagramINFOID:0000000001731809
System DescriptionINFOID:0000000001731810
• The Intelligent Cruise Control (ICC) system automatic ally maintains a selected distance from the vehicle
ahead according to that vehicle's speed, or at the set speed, if the road ahead is clear.
• The ICC function has two cruise control modes and brake assist (with preview function).
• To activate or deactivate the ICC system and set the vehicle speed and vehicle-to-vehicle distance, use the
ICC steering switch.
• The operation status of the ICC system is indicated on the ICC system display of the combination meter.
VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
• Vehicle-to-vehicle distance control mode, the vehicle can maintain the same speed as other vehicles without
the constant need to adjust the set speed as the dr iver would with a normal cruise control system.
• The system is intended to enhance the operation of the v ehicle when following the vehicle traveling in the
same lane and direction.
• If the ICC sensor integrated unit detects a slow er moving vehicle ahead, the system will reduce speed so
that the vehicle ahead can be followed at the selected distance.
• The system automatically controls the throttle and applies the brakes (up to 25% of vehicle braking power) if necessary.
• The detection range of the sensor is approximately 390 ft (120 m) ahead.
• Refer to Owner's Manual for Intelligent Cr uise Control System operating instructions.
CONVENTIONAL (FIXED SPEED) CRUISE CONTROL MODE
• Conventional (fixed speed) cruise control mode is cruising at preset speeds.
• Refer to Owner's Manual for Intelligent Cruise Control System operating instructions.
BRAKE ASSIST (WITH PREVIEW FUNCTION)
• When the force applied to brake pedal exceeds a certain level, the Brake Assist is activated and generates a
greater braking force than that of a convent ional brake booster even with light pedal force.
• When the Preview Function identifies the need to apply the sudden brake by sensing the vehicle ahead in the same lane and the distance and relative speed from it, it applies the brake pre-pressure before driver
depresses the brake pedal and improves brake response by reducing its free play.
• Refer to Owner's Manual for BRAKE ASSIST (WITH PREVIEW FUNCTION) operating instructions.
WKIA1976E
Revision: March 2010 2008 QX56

CCS-14
< FUNCTION DIAGNOSIS >
INTELLIGENT CRUISE CONTROL SYSTEM
ICC STEERING SWITCH
ICC system is operated by MAIN switch and four control switches, all mounted on the steering wheel.
NOTE:
The on board self-diagnosis function of the ICC system can be started with the RESUME/ACCELERATE
switch and SET/COAST switch. Refer to CCS-17, "
Diagnosis Description".
In Vehicle-To-Vehicle Distance Control Mode
In Conventional (Fixed Speed) Cruise Control Mode
ICC SYSTEM DISPLAY
For information about the ICC system display, refer to the Owner Manual.
1. ACCELERATE/RESUME switch 2. COAST/SET switch 3. CANCEL switch
4. ON/OFF switch 5. DISTANCE switch
ALOIA0013ZZ
No.Switch name Description
1 ACCEL/RES switch Resumes set speed or increases speed incrementally.
2 SET/COAST switch Sets desired cruise speed or reduces speed incrementally.
3 CANCEL switch Deactivates system without erasing set speed.
4 ON/OFF switch Master switch to activate the system.
5 DISTANCE switch Changes the following distance from: Long, Middle, Short.
No.Switch name Description
1 ACCEL/RES switch Resumes set speed or increases speed incrementally.
2 SET/COAST switch Sets desired cruise speed or reduces speed incrementally.
3 CANCEL switch Deactivates system without erasing set speed.
4 ON/OFF switch Master switch to activate the system.
5 DISTANCE switch Ineffective in this mode.
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CCS
INTELLIGENT CRUISE CONTROL SYSTEMCCS-15
< FUNCTION DIAGNOSIS >
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Component Parts LocationINFOID:0000000001731811
1. ICC system display 2. Combination meter M23, M24 (with
built in information display) 3. ICC steering switch M102
ALOIA0014ZZ
Revision: March 2010
2008 QX56

CCS
DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)
CCS-17
< FUNCTION DIAGNOSIS >
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DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)
Diagnosis DescriptionINFOID:0000000001731813
The ICC system includes the on board self-diagnosis functi on that allows the technician to check for any trou-
ble codes on the ICC system display by operating the ICC steering switch.
ON BOARD SELF-DIAGNOSIS OPERETION PROCEDURE
1. Turn ignition switch OFF.
2. Start engine.
3. From 5 seconds through 15 seconds after start engine, press
RESUME/ACCELERATE switch 5 times, and SET/COAST
switch 5 times.
NOTE:
• Never turn the MAIN switch ON.
• When operation above is not completed from 5 secondsthrough 15 seconds, start again from above go to 1.
4. When the on board self-diagnosis starts up, the ICC system display shows DTC No. (1) at the set vehicle speed indicator. Refer to CCS-55, "
Diagnostic Trouble Code (DTC) Chart".
NOTE:
• DTC will disappear after 5 minutes.
• When more than one malfunction is detected, a maxi mum of 3 code numbers can be stored; the latest
malfunction will be displayed first.
WHEN ON BOARD SELF-DIAGNOSIS WILL NOT START UP
If the on board self-diagnosis does not start up, check the following items.
PKIB8371E
JSOIA0008GB
Assumed abnormal point Inspection item
ICC steering switch malfunction. Perform the inspection for DTC 46 OPERATION SW CIRC. Refer to CCS-30, "
DTC
46 OPERATION SW CIRC" .
Harness malfunction between ICC
steering switch and ECM.
ECM malfunction.
ICC unit malfunction. • Inspect the ICC sensor power and ground circuits. Refer to
CCS-25, "
DTC 31
POWER SUPPLY CIR1, DTC 34 POWER SUPPLY CIR2"
• Perform the self-diagnosis for the ICC unit with CONSULT-III, and check the diag-
nosis results. Refer to CCS-55, "
Diagnostic Trouble Code (DTC) Chart".
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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