check engine INFINITI QX56 2011 Factory Workshop Manual

VDC WARNING LAMPBRC-125
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
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VDC WARNING LAMP
Component Function CheckINFOID:0000000006222653
1.CHECK VDC WARNING LAMP FUNCTION
Check that VDC warning lamp in combination meter turns ON for approx. 1 second after ignition switch is
turned ON.
CAUTION:
Never start engine.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Proceed to diagnosis procedure. Refer to BRC-125, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006222654
1.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND CIR-
CUIT
Perform the trouble diagnosis for ABS actuator and elec tric unit (control unit) power supply and ground circuit.
Refer to BRC-113, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace error-detected parts.
2.PERFORM THE SELF-DIAGNOSIS
With CONSULT-III.
Perform self-diagnosis for “ABS”.
Is any DTC detected?
YES >> Check the DTC. Refer to BRC-51, "DTC Index".
NO >> GO TO 3.
3.CHECK VDC WARNING LAMP SIGNAL
With CONSULT-III.
1. Select “ABS”, “DATA MONITOR” and “SLI P/VDC LAMP” according to this order.
2. Turn the ignition switch OFF.
3. Check that data monitor displays “On” for approx. 1 second after ignition switch is turned ON and then
changes to “Off”.
CAUTION:
Never start engine.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace ABS actuator and electric unit (control unit). Refer to BRC-137, "
Removal and Installa-
tion".
4.CHECK COMBINATION METER
Check combination meter. Refer to MWI-30, "
CONSULT-III Function".
Is the inspection result normal?
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-137, "Removal and Installa-
tion".
NO >> Repair or replace combination meter. Refer to MWI-85, "
Removal and Installation".
Revision: 2010 May2011 QX56

BRC-126
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
VDC OFF INDICATOR LAMP
VDC OFF INDICATOR LAMP
Component Function CheckINFOID:0000000006222655
1.CHECK VDC OFF INDICATO
R LAMP FUNCTION (1)
Check that VDC OFF indicator lamp in combination me ter turns ON for approx. 1 second after ignition switch
is turned ON.
CAUTION:
Never start engine.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Proceed to diagnosis procedure. Refer to BRC-126, "
Diagnosis Procedure"
2.CHECK VDC WARNING LAMP FUNCTION (2)
Check that VDC OFF indicator lamp in combination meter turns ON/OFF when VDC OFF switch is operated.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Check VDC OFF switch system. Refer to BRC-119, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006222656
1.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND CIR-
CUIT
Perform the trouble diagnosis for ABS actuator and elec tric unit (control unit) power supply and ground circuit.
Refer to BRC-113, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace error-detected parts.
2.CHECK VDC OFF INDICATOR LAMP SIGNAL (1)
With CONSULT-III.
1. Select “ABS”, “DATA MONITOR” and “OFF LAMP” according to this order.
2. Turn the ignition switch OFF.
3. Check that data monitor displays “On” for approx. 1 second after ignition switch is turned ON and then
changes to “Off”.
CAUTION:
Never start engine.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace ABS actuator and electric unit (control unit). Refer to BRC-137, "
Removal and Installa-
tion".
3.CHECK VDC OFF INDICATOR LAMP SIGNAL (2)
With CONSULT-III.
1. Select “ABS”, “DATA MONITOR” and “OFF LAMP” according to this order.
2. Check that data monitor displays “On” or “Off” each time when VDC OFF switch is operated.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Check VDC OFF switch system. Refer to BRC-119, "
Diagnosis Procedure".
4.CHECK COMBINATION METER
Check combination meter. Refer to MWI-30, "
CONSULT-III Function".
Is the inspection result normal?
YES >> Replace ABS actuator and electr ic unit (control unit). Refer to BRC-137, "Removal and Installa-
tion".
NO >> Repair or replace combination meter. Refer to MWI-85, "
Removal and Installation".
Revision: 2010 May2011 QX56

BRAKE PEDAL VIBRATION OR OPERATION SOUND OCCURS
BRC-131
< SYMPTOM DIAGNOSIS > [WITH VDC]
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BRAKE PEDAL VIBRATION OR OPERATION SOUND OCCURS
DescriptionINFOID:0000000006222665
 Brake pedal vibrates and motor sound from ABS actuat or and electric unit (control unit) occurs, when the
engine starts.
 Brake pedal vibrates during braking.
CAUTION:
Vibration may be felt during brake pedal is lightly de pressed (just placing a foot on it) in the following
conditions. This is normal.
 When shifting gears
 When driving on slippery road
 During cornering at high speed
 When passing over bumps or grooves [Approx. 50 mm (1.97 in) or more]
 When pulling away just after starting engine [at approx. 10 km/h (6.2 MPH) or higher]
Diagnosis ProcedureINFOID:0000000006222666
1.CHECK SYMPTON 1
Depress the brake pedal 10 times or more with the engine stopped and decrease the accumulator pressure to
check that there are pedal vibrations when the engine is started.
Do vibrations occur?
YES >> GO TO 2.
NO >> Check brake pedal. Refer to BR-21, "
Inspection and Adjustment".
2.CHECK SYMPTON 2
Depress the brake pedal 10 times or more with the engine stopped and decrease the accumulator pressure to
check that motor noise from ABS actuator and electr ic unit (control unit) occurs when the engine starts.
Does the operation sound occur?
YES >> GO TO 3.
NO >> Perform self-diagnosis for “ABS” with CONSULT-III.
3.CHECK SYMPTON 3
Check symptoms when electrical component (headlamps, etc.) switches are operated.
Does the symptom occur?
YES >> Check that radio (including wiring), antenna and antenna lead-in wires are not located near ABS actuator and electric unit (control unit). Move them if they are located near ABS actuator and elec-
tric unit (control unit).
NO >> Normal
Revision: 2010 May2011 QX56

NORMAL OPERATING CONDITIONBRC-133
< SYMPTOM DIAGNOSIS > [WITH VDC]
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NORMAL OPERATING CONDITION
DescriptionINFOID:0000000006222669
Symptom Result
Brake pedal slightly vibrates and operation sound (motor sound and sound from suspen-
sion) occurs when VDC function, TCS function, ABS function, EBD function, hill start assist
function and brake limited slip differential (BLSD) function operates. This is not a malfunction, The symptom
occurs VDC function
, TCS function, ABS
function, EBD function, hill start assist
function and brake limited slip differential
(BLSD) function that are normally operat-
ed.
Brake stopping distance may become longer than models without ABS function depending
on the road conditions, when
ABS function is operated on slip pery road like rough road,
gravel road or snowy road.
Brake pedal vibrates and operation sound occurs during sudden acceleration and corner-
ing, when VDC function, TCS function, hill start assist function and brake limited slip differ-
ential (BLSD) function is operated.
Brake pedal vibrates and motor sound from the engine room occurs, when the engine starts
or the vehicle starts just after starting the engine This is not a malfunction. The symptom
occurs during the brake fluid accumula-
tion in the accumulator and operational
check of the ABS actuator and electric
unit (control unit).
Acceleration may be felt insufficient depending on the road conditions. This is not a malfunction. The symptom occurs TCS function that puts the highest
priority to obtain the optimum traction
(stability).
TCS may operate momentarily, while driving on a road where friction coefficient varies, or
when downshifting or fully depressing accelerator pedal
ABS warning lamp and VDC warning lamp may turn ON, when the vehicle is on a rotating
turntable or is given a strong shaking or large vibrations on a ship while the engine is run-
ning.
In this case, restart the engine on a nor-
mal road. If the normal condition is re-
stored, there is no malfunction. In that
case, erase self-diagnosis result memory
for “ABS” with CONSULT-III.
VDC warning lamp may turn ON and VDC function, TCS function, hill start assist function
and brake limited slip differential (BLSD) function may not normally operate, when driving
on a special road the is extremely slanted (bank in a circuit course).
A malfunction in yaw rate/side/decel G sensor system may be detected when the vehicle
sharply turns during a spin turn, acceleration turn or drift driving while VDC function and
TCS function are OFF (VDC OFF switch is pressed and VDC OFF indicator lamp is in ON
status).
The vehicle speed does not increase, when the accelerator pedal is depressed while the
vehicle is on a 2-wheel chassis dynamometer for speedometer check.
This is not malfunction. (When checking
the vehicle on a chassis dynamometer,
operate VDC OFF switch so that TCS
function is OFF.)
The VDC warning lamp, ABS warn ing lamp and brake warning lamp turn ON and DTC
“C118E” may be detected in self-diagnosis resu lt of “ABS” when the brake pedal is exces-
sively operated, such as air bleeding. This is not a system malfunction because
this occurs due to the temporary de-
crease in accumulator fluid pressure. The
system returns to no
rmal condition when
the accumulator fluid pressure reaches
the specified pressure with the ignition
switch ON and the VDC warning lamp,
ABS warning lamp, a nd brake warning
lamp turn OFF. After these steps, ABS
self-diagnosis results are erased.
VDC OFF indicator lamp turns ON and TCS function is not operate when 4WD mode is “4L”.
(Models with 4WD system) This is not a malfunction. When the 4WD
mode becomes “4L” state, the TCS func-
tion is disabled. This function is enabled
when the 4WD mode becomes “AUTO”
or “4H”.
Revision: 2010 May2011 QX56

SWITCH DOES NOT TURN ON / SWITCH DOES NOT TURN OFF
BRC-155
< SYMPTOM DIAGNOSIS > [INTELLIGENT BRAKE ASSIST]
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SYMPTOM DIAGNOSIS
SWITCH DOES NOT TURN ON / SWITCH DOES NOT TURN OFF
Symptom TableINFOID:0000000006228301
CAUTION:
Perform the self-diagnosis with CONS ULT-III before the symptom diagnosis. Perform the trouble diag-
nosis if any DTC is detected.
DescriptionINFOID:0000000006228302
IBA system does not turn ON/OFF.
 IBA OFF indicator lamp does not illuminate even if the IBA OFF switch is depressed when IBA OFF indicator
lamp is not illuminated.
 IBA OFF indicator lamp does not turn off even if t he IBA OFF switch is depressed when IBA OFF indicator
lamp is illuminated.
NOTE:
 To turn the system OFF ⇔ON, push and hold the IBA OFF switch after starting the engine for more than 1
second.
 The system ON/OFF condition will be memoriz ed even if the ignition switch turns OFF.
Diagnosis ProcedureINFOID:0000000006228303
1.PERFORM THE SELF-DIAGNOSIS
1. Perform “All DTC Reading” with CONSULT-III.
2. Check if the DTC is detected in self-diagnosis results for “ICC/ADAS” with CONSULT-III. Refer to CCS-50,
"DTC Index".
Is any DTC detected?
YES >> GO TO 6.
NO >> GO TO 2.
2.IBA OFF SWITCH INSPECTION
1. Start the engine.
2. Check that “IBA SW” operates normally in “D ATA MONITOR” for “ICC/ADAS” with CONSULT-III.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 5.
3.CHECK IBA OFF INDICATOR CIRCUIT
1. Start the engine.
2. Select the active test item “METE R LAMP” for “ICC/ADAS” with CONSULT-III.
3. Check if the IBA OFF indicator lamp illuminates when the test item is operated.
Is the inspection result normal?
YES >> Refer to CCS-69, "Work Flow".
NO >> GO TO 4.
4.CHECK DATA MONITOR OF COMBINATION METER
Check that “BA W/L” operates normally in “DATA MO NITOR” for “METER/M&A” with CONSULT-III, when the
IBA OFF switch is pushed and hold for more than 1 second.
Is the inspection result normal?
YES >> Replace the combination meter. Refer to MWI-85, "Removal and Installation".
NO >> Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
Symptom Inspection item/Reference page
IBA system does not turn ON/OFF IBA OFF indicator lamp is not turned
ON
⇔OFF when operating IBA OFF switch BRC-155, "
Diagnosis Procedure"
Revision: 2010 May2011 QX56

BODY ALIGNMENTBRM-49
< SERVICE DATA AND SPECIFICATIONS (SDS)
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 When a measuring tape is used, check to be su re there is no elongation, twisting or bending.
 Measurements should be taken at the center of the mounting holes.
 An asterisk (*) following the value at the measuring poi nt indicates that the measuring point on the other side
is symmetrically the same value.
 The coordinates of the measurement points are the distances measured from the standard line of ″X ″, ″Y ″
and ″Z ″.
 ″Z ″: Imaginary base line [300 mm (11.81 in) below datum line ( ″0Z ″ at design plan)]
Engine CompartmentINFOID:0000000006248509
Measurement
Dimensions marked with ″*″ indicate symmetrically identical dimensions on both the right and left hand of the
vehicle.
1. Vehicle center 2. Front axle center 3. Imaginary base line
JSKIA0073GB
Revision: 2010 May2011 QX56

CCS
DIAGNOSIS SYSTEM (ADAS CONTROL UNIT)
CCS-31
< SYSTEM DESCRIPTION > [ICC]
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 It displays for up to 5 minutes and then stops.
 If multiple malfunctions exist, up to 6 DTCs can be stored in memory at the most, and the most recent
one is displayed first.
WHEN THE ON BOARD SELF-DIAGNOSIS DOES NOT START
If the on board self-diagnosis does not start, check the following items.
HOW TO ERASE ON BOARD SELF-DIAGNOSIS
1. Turn the ignition switch OFF.
2. Start the engine, and then start the on board self-diagnosis.
3. Press the CANCEL switch 5 times, and then press the DIS-
TANCE switch 5 times under the condition that the on board
self-diagnosis starts.
NOTE:
 Complete the operation within 10 seconds after pressing the
CANCEL switch first.
 If the operation is not completed within 10 seconds, repeat the procedure from step 1.
4. DTC 55 is displayed after erasing. NOTE:
DTCs for existing malfunction can not be erased.
5. Turn ignition switch OFF, and finish the diagnosis.
CONSULT-III Function (ICC/ADAS)INFOID:0000000006227984
APPLICATION ITEMS
CONSULT-III performs the following functions via CAN communication using ADAS control unit.
WORK SUPPORT
Assumed abnormal part Inspection item
Information display Combination meter malfunction Check that the self-diagnosis function of the combina-
tion meter operates. Refer to
MWI-29, "
On Board Diag-
nosis Function"
ICC steering switch malfunction
Perform the inspection for DTC“C1A06”. Refer to CCS-
94, "Diagnosis Procedure"Harness malfunction between ICC steering switch and ECM
ECM malfunction
ADAS control unit malfunction  Check power supply and ground circuit of ADAS con-
trol unit. Refer to DAS-62, "
Diagnosis Procedure".
 Perform SELF-DIAGNOSIS for “ICC/ADAS”with
CONSULT-III, and then check the malfunctioning
parts. Refer to DAS-38, "
DTC Index".
PKIB8373E
Diagnosis mode Description
Work Support Displays causes of automatic system cancellation occurred during system control
Self Diagnostic Result Displays the name of a malfunctioning system stored in the ADAS control unit
Data Monitor Displays ADAS control unit input/output data in real time
Active Test Enables an operational check of a load by transmitting a driving signal from the ADAS control unit to
the load
Ecu Identification Displays ADAS control unit part number
CAN Diag Support Monitor Displays a reception/transmission state of CAN communication and ITS communication
Revision: 2010 May2011 QX56

CCS
DIAGNOSIS SYSTEM (ADAS CONTROL UNIT)
CCS-39
< SYSTEM DESCRIPTION > [ICC]
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Active Pedal
CAUTION:
 Shift the selector lever to “P” po
sition, and then perform the test.
 Never depress the accelerator pedal excessively. (T he engine speed may rise unexpectedly when
finishing the test.)
NOTE:
 Depress the accelerator pedal to check when performing the test.
 The test can be performed only when the engine is running.
NOTE:
The test is finished in 10 seconds after starting
DCA INDICATOR
NOTE:
The test can be performed only when the engine is running.
LDP BUZZER
WARNING SYSTEM IND
Test item Operation Description Accelerator pedal operation
Active Pedal MODE1
Transmit the accelerator pedal feedback force control signal
to the accelerator pedal actuator via ITS communication. Constant with a force of 25 N
for 8 seconds
MODE2 Constant with a force of 15 N
for 8 seconds
MODE3 Change up to a force of 25 N for
8 seconds
MODE4 Change up to a force of 15 N for
8 seconds
Test start Starts the tests of “MODE1”, “MODE2”, “MODE3” and
“MODE4” —
Reset Stops transmitting the accelerator pedal feedback force
control signal below to end the test.
—
End Returns to the “SELECT TEST ITEM” screen —
JPOIA0061GB
Te s t i t e m Opera-
tion Description DCA system switch indicator
DCA INDICATOR Off
Stops transmitting the DCA system switch indicator signal be-
low to end the test
—
On Transmits the DCA system switch indicator signal to the com-
bination meter via CAN communication ON
Te s t i t e m
Opera-
tion Description Warning buzzer
LDP BUZZER Off
Stops transmitting the warning buzzer signal below to end the
test
—
On Transmits the warning buzzer signal to the warning buzzer ON
Revision: 2010 May2011 QX56

CCS-72
< BASIC INSPECTION >[ICC]
LASER BEAM AIMING ADJUSTMENT
LASER BEAM AIMING ADJUSTMENT
DescriptionINFOID:0000000006224293
OUTLINE OF LASER BEAM AIMING ADJUSTMENT
Always adjust the laser beam aiming after removing and installing or replacing the ICC sensor.
CAUTION:
The system does not operate normally
unless the laser beam aiming adjustment is performed. Always
perform it.
1. Set the ICC target board [SST: KV99110100 (J-45718)] to the correct position in front of the vehicle.
2. Set the laser beam aiming mode (“LASER BEAM AD JUST” on “Work support”) with CONSULT-III, and
then perform the adjustment according to the displa y. (Manually turn the up-down direction adjusting
screw for vertical adjustment. ICC sensor adjusts the automatic aiming for the horizontal direction.)
CAUTIONARY POINT FOR LASER BEAM AIMING ADJUSTMENT
CAUTION:
 For laser beam aiming adjustment, choose a level location where a view can be obtained without any
obstruction as far as 12 m (39 ft) or more in the forward direction.
 Adjust laser beam aiming for 5 second s or more after starting engine.
 Adjust the laser beam aiming with CONSULT-III. (The laser beam aiming cannot be adjusted without
CONSULT-III.)
 Never enter the vehicle during laser beam aiming adjustment.
 Never look directly into the laser beam sour ce (ICC sensor body window) during laser beam aiming
adjustment.
 Laser beam aiming adjustment is performed at idle. At this time, turn the headlamps OFF.
Work Procedure (Preparation)INFOID:0000000006224294
1.ADVANCE PREPARATION FOR LASER BEAM AIMING ADJUSTMENT
1. Adjust all tire pressure to the specified value.
2. Empty the vehicle. (Remove any luggage from the passenger compartment, luggage room, etc.)
3. Shift the selector lever to “P” pos ition, and release the parking brake.
4. Fully fill the fuel tank, and then check that t he coolant and oils are filled up to correct level.
5. Clean off the ICC sensor body window with a soft cloth.
>> Go to CCS-72, "
Work Procedure (Setting The ICC Tar-
get Board)".
Work Procedure (Setting The ICC Target Board)INFOID:0000000006224295
DESCRIPTION
Accurate adjustment of the laser beam requires t hat the ICC target board be accurately positioned.
CAUTION:
If the laser beam is adjusted with the ICC target board in the incorrect position, the ICC system does
not function normally.
1.ICC TARGET BOARD HEIGHT ADJUSTMENT
1 : ICC sensor
JSOIA0372ZZ
Revision: 2010 May2011 QX56

CCS
LASER BEAM AIMING ADJUSTMENTCCS-75
< BASIC INSPECTION > [ICC]
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5.CHECK THE ICC TARGET BOARD INSTALLATION AREA
Do not place anything other than ICC target board in the space shown in the figure (view from top).
NOTE:
In case the space shown in the figure is not avail able, cover the side of the ICC target board with a 1400
mm(4.6 ft)-size frosted black board or black cloth.
>> Go to CCS-75, "
Work Procedure (Laser Beam Aiming Adjustment)".
Work Procedure (Laser B eam Aiming Adjustment)INFOID:0000000006224296
DESCRIPTION
 Adjust the laser beam aiming in a vertical di rection with CONSULT-III as per the following.
 The laser beam aiming adjustment in a horizontal dire ction is performed automatically with CONSULT-III.
CAUTION:
 Never look directly into the laser beam source (ICC sensor body window) during laser beam aiming
adjustment.
 Perform all necessary work for laser beam aiming adjustment until the adjustment completes as
shown in the procedure. If the procedure do es not complete, the ICC system is inoperable.
1.SET CONSULT-III TO THE LASER BEAM AIMING ADJUSTMENT MODE
1. Start the engine.
2. Connect CONSULT-III and select “Work support” of “LASER”.
3. Select “LASER BEAM ADJUST” after t he “Work support” screen is displayed.
4. Select “START” after the “LASER BEAM ADJUST” screen is displayed.
NOTE:
If the adjustment screen does not appear within approx imately 10 seconds after “LASER BEAM ADJUST”
is selected, the following causes are possible.
 The ICC target board is not installed in the correct position.
 Adequate space is not secured around the ICC target board.
 The laser beam aiming adjustment exceeds its proper installation range.
- Deformation of vehicle body.
- Deformation of unit.
- Deformation of bracket.
 The area is not suitable for the adjustment work.
 ICC sensor body window is not clean.
 The ICC system warning lamp illuminates.
>> GO TO 2.
2.LASER BEAM AIMING ADJUSTMENT
After “ADJUST THE VERTICAL OF LASER BEAM AIMI NG” is displayed on CONSULT-III screen, adjust by
turning the up-down direction adjusting screw until “U/D CORRECT” becomes ±4 or less.
NOTE:
1. ICC target board 2. ICC sensor
L
1.6.5 m (21.3 ft) L2. 4.0 m (13.0 ft) W. 3.5 m (11.5 ft)
JSOIA0027ZZ
Revision: 2010 May2011 QX56