display INFINITI QX56 2010 Factory Service Manual

ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)BRC-91
< ECU DIAGNOSIS > [VDC/TCS/ABS]
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NOTE:
• 1: Confirm tire pr essure is normal.
• 2: On and off timing for warning lamp and indicator lamp.
• 3: Only 4WD models.
- ABS warning lamp: Refer to BRC-82, "
Description".
- Brake warning lamp: Refer to BRC-83, "
Description".
- VDC OFF indicator lamp: Refer to BRC-84, "
Description".
- SLIP indicator lamp: Refer to BRC-86, "
Description".
TERMINAL LAYOUT
RELEASE SW NC Active booster signal status When brake pedal is depressed OFF
When brake pedal is released
ON
OHB FAIL OHB fail safe signal OHB is active
ON
OHB is inactive OFF
HBA FAIL HBA fail safe signal HBA is active
ON
HBA is inactive OFF
OHB SIG OHB operation In OHB fail-safe
ON
OHB is normal OFF
HBA SIG HBA operation In HBA fail-safe
ON
HBA is normal OFF
STP OFF RLY Stop lamp relay signal When stop lamp relay is ON
ON
When stop lamp relay is OFF OFF
Monitor item
Display content Data monitor
Condition Reference value in
normal operation
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EXCESSIVE ABS FUNCTION OPERATION FREQUENCYBRC-103
< SYMPTOM DIAGNOSIS > [VDC/TCS/ABS]
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EXCESSIVE ABS FUNCTION OPERATION FREQUENCY
Diagnosis ProcedureINFOID:0000000005148086
1.CHECK START
Check front and rear brake force di stribution using a brake tester.
Is the inspection result normal?
YES >> GO TO 2
NO >> Check brake system.
2.CHECK FRONT AND REAR AXLE
Make sure that there is no excessive play in the front and rear axles. Refer to front: FAX-6, "
On-Vehicle
Inspection and Service", Rear: RAX-6, "On-Vehicle Inspection and Service".
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace malfunctioning components.
3.CHECK WHEEL SENSOR AND SENSOR ROTOR
Check the following.
• Wheel sensor installation for damage.
• Sensor rotor installation for damage.
• Wheel sensor connector connection.
• Wheel sensor harness inspection.
Is the inspection result normal?
YES >> GO TO 4
NO >> • Replace wheel sensor or sensor rotor. Refer to BRC-114, "
Removal and Installation".
• Repair harness.
4.CHECK ABS WARNING LAMP DISPLAY
Make sure that the ABS warning lamp is turned off af ter the ignition switch is turned ON or when driving.
Is the ABS warning lamp illuminated?
YES >> Perform self-diagnosis. Refer to BRC-23, "CONSULT-III Function (ABS)".
NO >> Normal
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BRC-106
< SYMPTOM DIAGNOSIS >[VDC/TCS/ABS]
ABS FUNCTION DOES NOT OPERATE
ABS FUNCTION DOES NOT OPERATE
Diagnosis ProcedureINFOID:0000000005148089
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-23, "
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-56, "
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-87, "
Diagnosis Procedure".
>> GO TO 5
4.DIAGNOSIS BY SYMPTOM
Referring to the diagnosis chart by symptom , perform the relevant diagnosis. Refer to CCS-58, "
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
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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:0000000005145977
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:
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CCS
INSPECTION AND ADJUSTMENTCCS-9
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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:
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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
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CCS
INTELLIGENT CRUISE CONTROL SYSTEMCCS-13
< FUNCTION DIAGNOSIS >
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INTELLIGENT CRUISE CONTROL SYSTEM
System DiagramINFOID:0000000005145979
System DescriptionINFOID:0000000005145980
• 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
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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:0000000005145981
1. ICC system display 2. Combination meter M23, M24 (with
built in information display) 3. ICC steering switch M102
4. ICC brake hold relay E134 5. ICC sensor E426. ICC brake switch E43
7. Stop lamp switch E38 8. ICC unit B13, B17 (view with luggage
side finisher lower LH removed)
ALOIA0014ZZ
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