check engine INFINITI QX56 2011 Factory Service Manual

WCS-20
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
BUZZER
BUZZER : CONSULT-III Function (BCM - BUZZER)INFOID:0000000006222687
CONSULT-III APPLICATION ITEMS
DATA MONITOR
CONSULT screen item Indication/Unit Description
Vehicle Speed km/h Vehicle speed of the moment a particular DTC is detected
Odo/Trip Meter km Total mileage (Odometer value) of the moment a particular DTC is detected
Vehicle Condition SLEEP>LOCK
Power position status of
the moment a particular
DTC is detected While turning BCM status from low power consumption mode to
normal mode (Power supply position is “LOCK”)
SLEEP>OFF While turning BCM status from low power consumption mode to
normal mode (Power supply position is “OFF”.)
LOCK>ACC While turning power supply position from “LOCK” to “ACC”
ACC>ON While turning power supply position from “ACC” to “IGN”
RUN>ACC While turning power supp
ly position from “RUN” to “ACC” (Vehicle
is stopping and selector lever is except P position.)
CRANK>RUN While turning power su
pply position from “CRANKING” to “RUN”
(From cranking up the engine to run it)
RUN>URGENT While turning power supply positi
on from “RUN“ to “ACC” (Emer-
gency stop operation)
ACC>OFF While turning power supply position from “ACC” to “OFF”
OFF>LOCK While turning power supply position from “OFF” to “LOCK”
OFF>ACC While turning power supply position from “OFF” to “ACC”
ON>CRANK While turning power supply position from “IGN” to “CRANKING”
OFF>SLEEP While turning BCM status from normal mode (Power supply posi-
tion is “OFF”.) to low power consumption mode
LOCK>SLEEP While turning BCM status from normal mode (Power supply posi-
tion is “LOCK”.) to low power consumption mode
LOCK Power supply position is “LOCK”
(Ignition switch OFF with steer-
ing is locked.)
OFF Power supply position is “OFF” (Ignition switch OFF with steering
is unlocked.)
ACC Power supply position is “ACC” (Ignition switch ACC)
ON Power supply position is “IGN” (Ignition switch ON with engine
stopped)
ENGINE RUN Power supply position is “RUN” (Ignition switch ON with engine
running)
CRANKING Power supply position is “CRANKING” (At engine cranking)
IGN Counter 0 - 39 The number of times that ignition switch is turned ON after DTC is detected
 The number is 0 when a malfunction is detected now.
 The number increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition
whenever ignition switch OFF → ON.
 The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.
Test item Diagnosis mode Description
BUZZER Data Monitor Displays BCM input data in real time.
Active Test Operation of electrical loads can be checked by sending driving signal to them.
Revision: 2010 May2011 QX56

WCS-24
< ECU DIAGNOSIS INFORMATION >
COMBINATION METER
DCA INDIgnition switch
ONNOTE:
This item is displayed, but cannot be moni-
tored.
Off
CHECK SUS IND Ignition switch
ONCK SUSP indicator lamp ON On
CK SUSP indicator lamp OFF Off
LCD Ignition switch
ON
During engine start in
formation indication B&P I
Ignition switch
ACC During engine start information indication B&P N
Ignition switch
LOCK During key ID warning indication ID NG
Ignition switch
LOCK During steering lock information indication ROTAT
Ignition switch
LOCK During P position warning indication SFT P
Ignition switch
LOCK During Intelligent Key insert information in-
dication
INSRT
Ignition switch
LOCK During Intelligent Key low battery warning
indication
BATT
Ignition switch
ON During take away warning indication NO KY
Ignition switch
LOCK During key warnin
g indication OUTKY
Ignition switch
ON During ACC warning indication LK WN
ACC TARGET Ignition switch
ONDuring vehicle ahead detection indicator in-
dication
On
Other than the above Off
ACC DISTANCE Ignition switch
ONWhen following distance set to “LONG” LONG
When following distance set to “MIDDLE” MID
When following distance set to “SHORT” SHORT
Set distance indicator not displayed Off
ACC OWN VHL Ignition switch
ONDuring own vehicle indicator indication On
Other than the above Off
ACC SET SPEED Ignition switch
ONDuring set vehicle speed indicator not dis-
played
Off
During set vehicle speed indicator dis-
played Indicates the set vehicle speed
ACC UNIT Ignition switch
ONSet vehicle speed indicator unit display ON On
Set vehicle speed indicator unit display OFF Off
Monitor Item Condition Value/Status
Revision: 2010 May2011 QX56

WCS-30
< ECU DIAGNOSIS INFORMATION >
COMBINATION METER
DTC Index
INFOID:0000000006222690
Warning lamp/indicator lamp ABS warning lamp
The lamp turns ON by suspending communication.
VDC warning lamp
Brake warning lamp
IBA OFF indicator lamp
4WD warning lamp
Malfunction indicator lamp
VDC OFF indicator lamp
CRUISE warning lamp
Low tire pressure warning lamp The lamp blinking caused by suspending communication.
High beam indicator lamp
The lamp turns OFF by suspending communication.
Turn signal indicator lamp
Tail lamp indicator lamp
A/T CHECK indicator lamp
Key warning lamp
ATP warning lamp
Lane departure warning lamp
LDP ON indicator lamp
CRUISE indicator lamp
Oil pressure warning lamp
SNOW mode indicator lamp
TOW mode indicator lamp
CK SUSP indicator lamp
BSW indicator lamp
Function Specifications
Display contents of CONSULT-III Diagnostic item is detected when... Refer to
CAN COMM CIRCUIT
[U1000] When combination meter is not transmitting or receiving CAN communication signal
for 2 seconds or more. MWI-59,
"Diagnosis
Procedure"
CONTROL UNIT (CAN)
[U1010]
When detecting error during the initial diagnosis of the CAN controller of combina-
tion meter. MWI-60, "Diagnosis
Procedure"
VEHICLE SPEED
[B2205]
The abnormal vehicle sp
eed signal is input from the ABS actuator and electric unit
(control unit) for 2 seconds or more. MWI-61, "Diagnosis
Procedure"
ENGINE SPEED
[B2267]
If ECM continuously transmits abnormal engine speed signals for 2 seconds or
more. MWI-62, "Diagnosis
Procedure"
WATER TEMP
[B2268]
If ECM continuously transmits abnormal engine coolant temperature signals for 60
seconds or more. MWI-63, "Diagnosis
Procedure"
Revision: 2010 May2011 QX56

WCS-46
< SYMPTOM DIAGNOSIS >
THE PARKING BRAKE RELEASE WARNING CONTINUES SOUNDING, OR
DOES NOT SOUND
THE PARKING BRAKE RELEASE WARNING CONTINUES SOUNDING, OR
DOES NOT SOUND
DescriptionINFOID:0000000006222534
 The parking brake warning buzzer sounds continuously during vehicle travel though the parking brake is
released.
 The parking brake warning buzzer does not sound at a ll even though driving the vehicle with the parking
brake applied.
Diagnosis ProcedureINFOID:0000000006222535
1.CHECK PARKING BRAKE WARNING LAMP
1. Start the engine.
2. Check the operation of the brake warni ng lamp by operating the parking brake.
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation"
NO >> GO TO 2.
2.CHECK PARKING BRAKE SWITCH SIGNAL CIRCUIT
Perform check for the parking brake switch signal circuit. Refer to WCS-43, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK PARKING BRAKE SWITCH
Perform a unit check for the parking brake switch. Refer to WCS-43, "
Component Inspection".
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation"
NO >> Replace parking brake switch. Refer to PB-5, "Exploded View".
When parking brake is applied : ON
When parking brake is released : OFF
Revision: 2010 May2011 QX56

WT-14
< ECU DIAGNOSIS INFORMATION >
LOW TIRE PRESSURE WARNING CONTROL UNIT
ECU DIAGNOSIS INFORMATION
LOW TIRE PRESSURE WARNING CONTROL UNIT
Reference ValueINFOID:0000000006225497
VALUES ON THE DIAGNOSIS TOOL
CAUTION:
The reference values in the table below come from the control unit calculation data. The normal values
may in some cases be displayed even though the power circuit (harness) is open or shorted.
TERMINAL LAYOUT
PHYSICAL VALUES
CAUTION:
When using circuit tester to measure voltage for in spection, be sure not to extend forcibly any con-
nector terminals.
Monitor item Condition Value/Status
VHCL SPEED SE Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under standard condition. Approx. equal to the indication
on speedometer (Inside of
±
10%)
AIR PRESS FL Start engine and drive at 40 km/h (25 MPH) or more for 10 minutes. Approximately equal to the indi-
cation on tire gauge value for
front LH tire
AIR PRESS FR Start engine and drive at 40 km/h (25 MPH) or more for 10 minutes. Approximately equal to the indi-
cation on tire gauge value for
front RH tire
AIR PRESS RR Start engine and drive at 40 km/h (25 MPH) or more for 10 minutes. Approximately equal to the indi-
cation on tire gauge value for
rear RH tire
AIR PRESS RL Start engine and drive at 40 km/h (25 MPH) or more for 10 minutes. Approximately equal to the indi-
cation on tire gauge value for
rear LH tire
ID REGST FL1 Front LH transmitter ID registered Done
Front LH transmitter ID unregistered Yet
ID REGST FR1 Front RH transmitter ID registered Done
Front RH transmitter ID unregistered Yet
ID REGST RR1 Rear RH transmitter ID registered Done
Rear RH transmitter ID unregistered Yet
ID REGST RL1 Rear LH transmitter ID registered Done
Rear LH transmitter ID unregistered Yet
WARNING LAMP Low tire pressure
warning lamp: ON On
Low tire pressure warning lamp: OFF Off
JSEIA0024ZZ
Revision: 2010 May2011 QX56

DIAGNOSIS AND REPAIR WORK FLOWWT-25
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow INFOID:0000000006225501
DETAILED FLOW
1.COLLECT THE INFORMATION FROM THE CUSTOMER
It is also important to clarify customer concerns before starting the inspection. Reproduce the symptom, and
understand it fully. Interview the customer about the concer ns carefully. In some cases, it is necessary to
check the symptoms by driving the vehicle with the customer.
CAUTION:
Customers are not professionals. Never assume“mayb e the customer means...” or “maybe the cus-
tomer mentioned this symptom.
>> GO TO 2.
2.BASIC INSPECTION
1. Turn the ignition switch ON. CAUTION:
Never start the engine.
2. Check the tire pressure for all wheels and adjust to the specified value. Refer to WT-69, "
Tire Air Pres-
sure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Inspect or repair the tires or wheels.
3.CHECK LOW TIRE PRESSURE WARNING LAMP STATUS
Check low tire pressure warning lamp display.
Does not low tire pressure warning lamp turn OFF?
YES >> GO TO 4.
NO >> GO TO 8.
4.CHECK DTC WITH LOW TIRE PR ESSURE WARNING CONTROL UNIT
With CONSULT-III
Perform the self-diagnosis fo r “AIR PRESSURE MONITOR”.
Is any DTC detected?
YES >> GO TO 5.
NO >> GO TO 8.
5.ERASE DTC MEMORY
With CONSULT-III
1. Record DTC.
2. Erase DTC once.
NOTE:
After erasing DTC record, currently occurr ed DTC can be detected by reading out DTC again.
>> GO TO 6.
6.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) with recorded DTC.
If two or more DTCs are detected, refer to WT-17, "
DTC Inspection Priority Chart" and determine trouble diag-
nosis order.
Is any malfunction detected by self-diagnosis?
YES >> GO TO 7.
Revision: 2010 May2011 QX56

WT-26
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORK FLOW
NO >> GO TO 8.
7.DETECT MALFUNCTIONING PART BY DIAGNOSIS PROCEDURE
Perform the diagnosis applicable to the displayed DTC. Refer to WT-18, "
DTC Index".
>> GO TO 10.
8.CRUISE FOR SYMPTOM CHECK
1. Start the engine.
2. Drive for several minutes at a speed of 40 km /h (25 MPH) or more, then stop the vehicle.
>> GO TO 9.
9.PERFORM DIAGNOSIS BY SYMPTOM
Perform trouble diagnosis or repair applicable to the symptom. Refer to WT-53, "
Symptom Table".
>> GO TO 11.
10.FINAL CHECK (WHEN DTC WAS DETECTED)
With CONSULT-III
Perform “DTC CONFIRMATION PROCE DURE” (self-diagnosis) with applicable DTC.
Is any malfunction detec ted by self-diagnosis?
YES >> GO TO 7.
NO >> INSPECTION END
11 .FINAL CHECK (WHEN SYMPTOM OCCURRED)
Make sure that the symptom is not detected.
Does symptom remain?
YES >> GO TO 9.
NO >> INSPECTION END
Revision: 2010 May2011 QX56

C1704, C1705, C1706, C1707 LOW TIRE PRESSURE
WT-31
< DTC/CIRCUIT DIAGNOSIS >
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DTC/CIRCUIT DIAGNOSIS
C1704, C1705, C1706, C1707 LOW TIRE PRESSURE
DTC LogicINFOID:0000000006225508
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION
With CONSULT-III
1. Turn the ignition switch ON.
CAUTION:
Never start the engine.
2. Check the tire pressure for all wheels and adjust to the specified value. Refer to WT-69, "
Tire Air Pres-
sure".
3. Perform self-diagnosis for “AIR PRESSURE MONITOR”.
Is DTC
“C1704”, “C1705”, “C1706”, or “C1707” detected?
YES >> Proceed to WT-31, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225509
1.CHECK TIRE PRESSURE
Check the air pressure of all wheels. Refer to WT-69, "
Tire Air Pressure".
Is the inspection result normal?
YES >> Replace the DTC-detected malfunctioning transmitter. Refer to WT-66, "Removal and Installa-
tion".
NO >> After adjusting the air pressure, GO TO 2.
2.CHECK TIRE PRESSURE SIGNAL
With CONSULT-III
1. Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then drive normally for 10 minutes.
2. Stop the vehicle.
3. Select “DATA MONITOR” for “AIR PRESSURE MONITOR” with CONSULT-III.
4. Within 5 minutes after vehicle stopped, check t hat the tire pressures match the standard value.
Is the inspection result normal?
YES >> INSPECTION END
DTC Display Item Malfunction detected condition Possible causes
C1704 LOW PRESSURE FL Front LH wheel pressure drops to 189 kPa (1.93 kg/cm
2, 27.4 psi)
or less
Low tire pressure
C1705 LOW PRESSURE FR
Front RH wheel pressure drops to 189 kPa (1.93 kg/cm
2, 27.4 psi)
or less
C1706 LOW PRESSURE RR Rear RH wheel pressure drops to 189 kPa (1.93 kg/cm
2, 27.4 psi)
or less
C1707 LOW PRESSURE RL Rear LH wheel pressure drops to 189 kPa (1.93 kg/cm
2, 27.4 psi) or
less
Monitor item Displayed value
AIR PRESS FL Approximately equal to the indication on tire gauge value for front LH tire
AIR PRESS FR Approximately equal to the indication on tire gauge value for front RH tire
AIR PRESS RR Approximately equal to the indica tion on tire gauge value for rear RH tire
AIR PRESS RL Approximately equal to the indication on tire gauge value for rear LH tire
Revision: 2010 May2011 QX56

C1708, C1709, C1710, C1711 TRANSMITTER (NO DATA)
WT-35
< DTC/CIRCUIT DIAGNOSIS >
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CHECK RECEIVER GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace the malfunctioning harness or connector.
3.CHECK TIRE PRESSURE RECE IVER POWER SUPPLY CIRCUIT
1. Connect low tire pressure warning control unit harness connector.
2. Turn the ignition switch ON. CAUTION:
Never start the engine.
3. Check the voltage between tire pressure receiver harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace the low tire pressure warning control unit. Refer to WT-65, "
Removal and Installation".
4.TIRE PRESSURE RECEIVER SIGNAL
Check tire pressure receiver signal. Refer to WT-42, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace error-detected parts.
5.TRANSMITTER ID REGISTRATION
Perform transmitter ID registration. Refer to WT-29, "
Work Procedure".
Is transmitter ID registration completed?
YES >> GO TO 6.
NO >> Replace applicable transmitter. Refer to WT-66, "
Removal and Installation".
6.CHECK TIRE PRESSURE SIGNAL
With CONSULT-III
1. Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then drive normally for 10 minutes.
2. Stop the vehicle.
3. Select “DATA MONITOR” for “AIR PRESSURE MONITOR” with CONSULT-III.
4. Within 15 minutes after vehicle stopped, check t hat the tire pressures match the standard value.
Is the inspection result normal?
Low tire pressure warning control unit
—Continuity
Connector Terminal
M96 26
Ground Not existed
25
24
23
Tire pressu
re receiver
—Voltage
Connector Terminal
E53 (Front LH)
1 Ground Approx. 9 - 16 V
E19 (Front RH)
B43 (Rear LH)
B212 (Rear RH)
Monitor item Displayed value
AIR PRESS FL Approximately equal to the indication on tire gauge value for front LH tire
AIR PRESS FR Approximately equal to the indication on tire gauge value for front RH tire
AIR PRESS RR Approximately equal to the indica tion on tire gauge value for rear RH tire
AIR PRESS RL Approximately equal to the indication on tire gauge value for rear LH tire
Revision: 2010 May2011 QX56

C1716, C1717, C1718, C1719 TRANSMITTER (PRESSURE DATA)
WT-37
< DTC/CIRCUIT DIAGNOSIS >
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C1716, C1717, C1718, C1719 TRAN SMITTER (PRESSURE DATA)
DTC LogicINFOID:0000000006225512
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION
With CONSULT-III
1. Turn the ignition switch ON.
CAUTION:
Never start the engine.
2. Check the tire pressure for all wheels and adjust to the specified value. Refer to WT-69, "
Tire Air Pres-
sure".
3. Perform self-diagnosis for “AIR PRESSURE MONITOR”.
Is DTC
“C1716”, “C1717”, “C1718”, or “C1719” detected?
YES >> Proceed to WT-37, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225513
1.CHECK TIRE PRESSURE
Check the air pressure of all wheels. Refer to WT-69, "
Tire Air Pressure".
Is the inspection result normal?
YES >> Replace the DTC-detected malfunctioning transmitter. Refer to WT-66, "Removal and Installa-
tion".
NO >> After adjusting the air pressure, GO TO 2.
2.CHECK TIRE PRESSURE SIGNAL
With CONSULT-III
DTC Display Item Malfunction detected condition Possible causes
C1716 [PRESSDATA ERR] FL Malfunction in the tire pressure data from the
front LH wheel transmitter.
NOTE:
In this case the low tire pressure warning
control unit judges that the tire pressure is
438.60 kPa (4.47 kg/cm
2, 63.60 psi).
 Transmitter ID registration in-
complete
 Transmitter malfunction
C1717 [PRESSDATA ERR] FR
Malfunction in the tire pressure data from the
front RH wheel transmitter.
NOTE:
In this case the low tire pressure warning
control unit judges that the tire pressure is
438.60 kPa (4.47 kg/cm
2, 63.60 psi).
C1718 [PRESSDATA ERR] RR Malfunction in the tire pressure data from the
rear RH wheel transmitter.
NOTE:
In this case the low tire pressure warning
control unit judges that the tire pressure is
438.60 kPa (4.47 kg/cm
2, 63.60 psi).
C1719 [PRESSDATA ERR] RL Malfunction in the tire pressure data from the
rear LH wheel transmitter.
NOTE:
In this case the low tire pressure warning
control unit judges that the tire pressure is
438.60 kPa (4.47 kg/cm
2, 63.60 psi).
Revision: 2010 May2011 QX56