2011 INFINITI QX56 check engine

BRC-122
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
ABS WARNING LAMP
ABS WARNING LAMP
Component Function CheckINFOID:0000000006222649
1.CHECK ABS WARNING LAMP FUNCTION
Check that ABS 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-122, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006222650
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 ABS WARNING LAMP SIGNAL
With CONSULT-III.
1. Select “ABS”, “DATA MONITOR” and “ABS WARN 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 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 WARNING LAMPBRC-123
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
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BRAKE WARNING LAMP
Component Function CheckINFOID:0000000006222651
1.CHECK BRAKE WARNING LAMP FUNCTION (1)
Check that brake 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 >> GO TO 2.
NO >> Proceed to diagnosis procedure. Refer to BRC-123, "
Diagnosis Procedure".
2.CHECK BRAKE WARNING LAMP FUNCTION (2)
Check that brake warning lamp in combination meter turns ON/OFF when parking brake is operated.
NOTE:
Brake warning lamp turns ON when parking brake is operated (when parking brake switch is ON).
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check parking brake switch system. Refer to BRC-117, "
Diagnosis Procedure".
3.CHECK BRAKE WARNING LAMP FUNCTION (3)
Check that brake warning lamp in combination meter turns ON/OFF when brake fluid level switch is operated
while brake fluid level in reservoir tank is with the specified level.
NOTE:
Brake warning lamp turns ON when brake fluid is less than the specified level (when brake fluid level switch is
ON).
Is the inspection result normal?
YES >> INSPECTION END
NO >> Check brake fluid level switch system. Refer to BRC-103, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006222652
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 BRAKE WARNING LAMP SIGNAL
With CONSULT-III.
1. Select “ABS”, “DATA MONITOR” and “EBD WARN 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?
Revision: 2010 May2011 QX56

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