BATTERY INFINITI QX56 2011 Factory Service Manual

SEC-16
< SYSTEM DESCRIPTION >[WITH INTELLIGENT KEY SYSTEM]
SYSTEM
PRECAUTIONS FOR KEY REGISTRATION
 The ID registration is a procedure that erases the cu
rrent IVIS (NATS) ID once, and then reregisters a new
ID. Therefore before starting the registration operation, collect all registered Intelligent Keys from the cus-
tomer.
 When registering the Intelligent Key, perform only one procedure to simultaneously register both ID [IVIS
(NATS) ID and Intelligent Key ID].
SECURITY INDICATOR LAMP
 Warns that the vehicle is equipped with IVIS (NATS).
 Security indicator lamp always blinks when the pow er supply position is any position other than ON.
NOTE:
Because security indicator lamp is highly efficient, the battery is barely affected.
ENGINE START OPERATION WHEN INTELLIGENT KEY IS CONTACTED TO PUSH-BUTTON IG-
NITION SWITCH
1. When brake pedal is depressed while selector leve r is in the P position, BCM activates NATS antenna
amp. that is located behind push-button ignition switch.
2. When Intelligent Key (transponder built-in) backsi de is contacted to push-button ignition switch, BCM
starts IVIS (NATS) ID verification between BCM and Intelligent Key (transponder built-in) via NATS
antenna amp.
3. When the IVIS (NATS) ID verification result is OK, buzzer in combination meter sounds and BCM trans-
mits the result to ECM.
4. When push-button ignition switch is pressed, BCM transmits steering unlock signal to steering lock unit
and IPDM E/R.
5. IPDM E/R turns steering lock relay ON and supplies power supply to the steering lock unit.
6. The steering lock is released.
7. BCM transmits the power supply stop signal to IPDM E/R when detecting that the steering lock is in the
unlock position.
8. IPDM E/R turns steering lock relay OFF and stops power supply to the steering lock unit.
9. BCM turns ACC relay ON and transmits ignition power supply ON signal to IPDM E/R.
10. IPDM E/R turns the ignition relay ON and starts the ignition power supply.
11. BCM detects that the selector lever position is P or N.
12. BCM transmits starter request signal to IPDM E/R and turns the starter relay in IPDM E/R ON if BCM judges that the engine start condition* is satisfied.
13. IPDM E/R turns the starter control relay ON when receiving the starter request signal.
14. Power supply is supplied through the starter relay and the starter control relay to operate the starter motor.
15. When BCM receives feedback signal from ECM indica ting that the engine is started, BCM transmits a
stop signal to IPDM E/R and stops cranking by turning off the starter motor relay. (If engine start is unsuc-
cessful, cranking stops automatically within 5 seconds.)
*: For the engine start condition, refer to “POWER SUPPLY POSITION CHANGE TABLE BY PUSH-BUTTON
IGNITION SWITCH OPERATION” below.
POWER SUPPLY POSITION CHANGE TABLE BY PUSH-BUTTON IGNITION SWITCH OPERA-
TION
The power supply position changing operation can be performed with the following operations.
NOTE:
 When an Intelligent Key is within the detection area of inside key antenna and when Intelligent Key backside
is contacted to push-button ignition switch, it is equivalent to the operations below.
 When starting the engine, the BCM monitors under the engine start conditions,
- Brake pedal operating condition
- Selector lever position
- Vehicle speed
Vehicle speed: less than 4 km/h (2.5 MPH)
Revision: 2010 May2011 QX56

SEC-20
< SYSTEM DESCRIPTION >[WITH INTELLIGENT KEY SYSTEM]
SYSTEM
this time, if BCM still detects unauthorized access to t
he vehicle, the system is switched to the ALARM phase
again. This RE-ALARM operation is carried out a maximum of 2 times.
To cancel the ALARM operation, refer to the switching condition of No. 12 in the table above.
NOTE:
If a battery terminal is disconnected during the ALARM phase, theft warning alarm stops. But when the battery
terminal is reconnected, theft warning alarm is activated again.
PRE-RESET Phase
The PRE-RESET phase is the transient state betw een each phase and DISARMED phase. If only the condi-
tion of hood is not satisfied, the system switches to the PRE-RESET phase. Then, when any condition is
changed, the system switches to t he DISARMED phase or PRE-ARMED phase.
PANIC ALARM
 The panic alarm function activates horns and headlamps intermittently when the owner presses the PANIC
ALARM button of Intelligent Key outside the vehicle while the power supply position is OFF or LOCK.
 When BCM receives panic alarm signal from Intelligent Key, BCM transmits “Theft Warning Horn Request”
signal and “High Beam Request” signal intermittently to IPDM E/R via CAN communication. To prevent the
activation due to mis-operation of Intelligent Key by ow ner, the panic alarm function is activated when BCM
receives the signal for 0.4 - 0.6 seconds.
 Panic alarm operation is maintained for 25 seconds.
 Panic alarm operation is cancelled when BCM receives one of the following signals.
- LOCK button of Intelligent Key: ON
- UNLOCK button of Intelligent Key: ON
- PANIC ALARM button of Intelligent Key: Long pressed
- Any door request switch: ON
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (BCM)SEC-21
< SYSTEM DESCRIPTION > [WITH INTELLIGENT KEY SYSTEM]
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DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Fu nction (BCM - COMMON ITEM)INFOID:0000000006365349
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.
×: Applicable item
*: This item is indicated, but not used.
FREEZE FRAME DATA (FFD)
The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on
CONSULT-III.
Diagnosis mode Function Description
Work Support Changes the setting for each system function.
Self Diagnostic Result Displays the diagnosis results judged by BCM. Refer to BCS-57, "
DTCIndex".
CAN Diag Support Monitor Monitors the reception status of CAN communication viewed from BCM. Refer to CONSULT-III opera-
tion manual.
Data Monitor The BCM input/output signals are displayed.
Active Test The signals used to activate each device are forcibly supplied from BCM.
Ecu Identification The BCM part number is displayed.
Configuration  Read and save the vehicle specification.
 Write the vehicle specification when replacing BCM.
System Sub system selection item Diagnosis mode
Work Support Data Monitor Active Test
Door lock DOOR LOCK ×××
Rear window defo gger REAR DEFOGGER ××
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ×××
— AIR CONDITONER* ××
 Intelligent Key system
 Engine start system INTELLIGENT KEY
×××
Combination switch COMB SW ×
Body control system BCM ×
IVIS IMMU ×××
Interior room lamp battery saver BATTERY SAVER ×××
Back door TRUNK ×
Vehicle security system THEFT ALM ×××
RAP system RETAINED PWR ×
Signal buffer system SIGNAL BUFFER ××
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (BCM)SEC-23
< SYSTEM DESCRIPTION > [WITH INTELLIGENT KEY SYSTEM]
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ENGINE START BY I-KEY Engine start function mode can be changed to operation with this mode
 On: Operate
 Off: Non-operation
TRUNK/GLASS HATCH OPEN Buzzer reminder function mode by back door opener switch can be changed to operation with
this mode
 On: Operate
 Off: Non-operation
PANIC ALARM SET Panic alarm button pressing time on Intelligent Key button can be selected from the following
with this mode
 MODE 1: 0.5 sec
 MODE 2: Non-operation
 MODE 3: 1.5 sec
TRUNK OPEN DELAY Back door open button pressing to Intelligent Key button can be selected as per the following
in this mode
 MODE 1: Press and hold
 MODE 2: Press twice
 MODE 3: Press and hold, or press twice
LO- BATT OF KEY FOB WARN Intelligent Key low battery warning mode can be changed to operation with this mode
 On: Operate
 Off: Non-operation
ANTI KEY LOCK IN FUNCTI Key reminder function mode can be changed to operation with this mode
 On: Operate
 Off: Non-operation
HAZARD ANSWER BACK Hazard reminder function mode by door request switch and Intelligent Key button can be se-
lected from the following with this mode
 Lock Only: Door lock operation only
 Unlock Only: Door unlock operation only
 Lock/Unlock: Lock and unlock operation
 Off: Non-operation
ANS BACK I-KEY LOCK Buzzer reminder function (lock operation) mode by door request switch can be selected from
the following with this mode
 Horn Chirp: Sound horn
 Buzzer: Sound Intelligent Key warning buzzer
 Off: Non-operation
ANS BACK I-KEY UNLOCK Buzzer reminder function (unlock operation) mode by door request switch can be changed to
operation with this mode
 On: Operate
 Off: Non-operation
SHORT CRANKING OUTPUT Starter motor can operate during the times below
 70 msec
100 msec
200 msec
CONFIRM KEY FOB ID It can be checked wh ether Intelligent Key ID code is registered or not in this mode
AUTO LOCK SET Auto door lock operation time can be changed in this mode
 MODE 1: OFF
 MODE 2: 30 sec
 MODE 3: 1 minute
 MODE 4: 2 minutes
 MODE 5: 3 minutes
 MODE 6: 4 minutes
 MODE 7: 5 minutes
HORN WITH KEYLESS LOCK Horn reminder function mode by Intelligent Key button can be selected from the following with
this mode
 On: Operate
 Off: Non-operation
Monitor item Description
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (BCM)SEC-25
< SYSTEM DESCRIPTION > [WITH INTELLIGENT KEY SYSTEM]
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*: OFF is displayed when brake pedal is depressed while brake switch power supply is OFF.
ACTIVE TEST
PRMT RKE STRT NOTE:
This item is displayed, but cannot be monitored
TRNK/HAT MNTR NOTE:
This item is displayed, but cannot be monitored
RKE-LOCK Indicates [On/Off] condition of LOCK signal from Intelligent Key
RKE-UNLOCK Indicates [On/Off] condition of UNLOCK signal from Intelligent Key
RKE-TR/BD NOTE:
This item is displayed, but cannot be monitored
RKE-PANIC Indicates [On/Off] condition of PANIC button of Intelligent Key
RKE-MODE CHG Indicates [On/Off] condition of MODE CHANGE signal from Intelligent Key
RKE OPE COUN1 When remote keyless entry receiver receives the signal transmitted while operating on Intelli-
gent Key, the numerical value start changing
RKE OPE COUN2 NOTE:
This item is displayed, but cannot be monitored
Monitor Item Condition
Test item Description
BATTERY SAVER This test is able to check interior room lamp operation
 On: Operate
 Off: Non-operation
OUTSIDE BUZZER This test is able to check Intelligent Key warning buzzer operation
 On: Operate
 Off: Non-operation
INSIDE BUZZER This test is able to check warning chime in combination meter operation
 Take Out: Take away warning chime sounds when CONSULT-III screen is touched
 Key: Key warning chime sounds when CONSULT-III screen is touched
 Knob: OFF position warning chime sounds when CONSULT-III screen is touched
 Off: Non-operation
INDICATOR This test is able to check warning lamp operation
 KEY ON: “KEY” Warning lamp illuminates when CONSULT-III screen is touched
 KEY IND: “KEY” Warning lamp blinks when CONSULT-III screen is touched
 Off: Non-operation
INT LAMP This test is able to check interior room lamp operation
 On: Operate
 Off: Non-operation
LCD This test is able to check meter display information
 Engine start information displays when “BP N” on CONSULT-III screen is touched
 Engine start information displays when “BP I” on CONSULT-III screen is touched
 Key ID warning displays when “ID NG” on CONSULT-III screen is touched
 Steering lock information displays when “ROTAT” on CONSULT-III screen is touched
 P position warning displays when “SFT P” on CONSULT-III screen is touched
 INSRT: This item is displayed, but cannot be monitored
 BATT: This item is displayed, but cannot be monitored
 Take away through window warning displays when “NO KY” on CONSULT-III screen is
touched
 Take away warning displa y when “OUTKEY” on CONSUL T-III screen is touched
 OFF position warning display when “LK WN” on CONSULT-III screen is touched
FLASHER This test is able to check security hazard lamp operation
The hazard lamps are activated after “LH/RH/Off” on CONSULT-III screen is touched
P RANGE This test is able to check A/T shift selector power supply
 On: Operate
 Off: Non-operation
ENGINE SW ILLUMI This test is able to check push-button ignition switch illumination operation
Push-ignition switch illumination illuminates when “ON” on CONSULT-III screen is touched
Revision: 2010 May2011 QX56

SEC-56
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
P1614 CHAIN OF IMMU-KEY
P1614 CHAIN OF IMMU-KEY
DTC LogicINFOID:0000000006226208
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE 1
1. Contact Intelligent Key backside to push-button ignition switch.
2. Check DTC in “Self Diagnostic Result” mode of “ENGINE” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-56, "Diagnosis Procedure".
NO >> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE 2
1. Press the push-button ignition switch.
2. Check DTC in “Self Diagnostic Result” mode of “ENGINE” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-56, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226209
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check that the following fuse in IPDM E/R is not blown.
Is the fuse fusing?
YES >> Replace the blown fuse after repairing the cause of blowing.
NO >> GO TO 2.
2.CHECK NATS ANTENNA AMP. POWER SUPPLY
1. Disconnect NATS antenna amp. connector.
2. Check voltage between NATS antenna amp. harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK NATS ANTENNA AMP. POWER SUPPLY CIRCUIT
1. Disconnect IPDM E/R connector.
2. Check continuity between IPDM E/R har ness connector and NATS antenna amp. connector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1614 CHAIN OF IMMU-KEY Inactive communication between NATS
antenna amp. and BCM  Harness or connectors
(NATS antenna amp. circuit is open or
shorted.)
 NATS antenna amp.
 IPDM E/R
Signal name Fuse No.
Battery power supply 43
(+) (–)Voltage (V)
(Approx.)
NATS antenna amp.
Connector Terminal M26 1 Ground Battery voltage
Revision: 2010 May2011 QX56

B2198 NATS ANTENNA AMP.SEC-65
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2198 NATS ANTENNA AMP.
DTC LogicINFOID:0000000006226216
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE 1
1. Contact Intelligent Key backside to push-button ignition switch.
2. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-65, "Diagnosis Procedure".
NO >> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE 2
1. Press the push-button ignition switch.
2. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-65, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226217
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check that the following fuse in IPDM E/R is not blown.
Is the fuse fusing?
YES >> Replace the blown fuse after repairing the cause of blowing.
NO >> GO TO 2.
2.CHECK NATS ANTENNA AMP. POWER SUPPLY
1. Disconnect NATS antenna amp. connector.
2. Check voltage between NATS antenna amp. harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK NATS ANTENNA AMP. POWER SUPPLY CIRCUIT
1. Disconnect IPDM E/R connector.
2. Check continuity between IPDM E/R har ness connector and NATS antenna amp. connector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2198 NATS ANTENNA AMP. Inactive communication between NATS
antenna amp. and BCM  Harness or connectors
(NATS antenna amp. circuit is open or
shorted.)
 NATS antenna amp.
IPDM E/R
Signal name Fuse No.
Battery power supply 43
(+) (–)Voltage (V)
(Approx.)
NATS antenna amp.
Connector Terminal M26 1 Ground Battery voltage
Revision: 2010 May2011 QX56

B2555 STOP LAMPSEC-73
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2555 STOP LAMP
DTC LogicINFOID:0000000006226222
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Depress the brake pedal and wait 1 second or more.
2. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-73, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226223
1.CHECK STOP LAMP SWITCH INPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check voltage between BCM harness connector and ground.
Is the inspection normal?
YES >> GO TO 2.
NO-1 >> Check 10 A fuse [No. 7, lo cated in the fuse block (J/B)].
NO-2 >> Check harness for open or short between BCM and fuse.
2.CHECK STOP LAMP SWIT CH POWER SUPPLY CIRCUIT
1. Disconnect stop lamp switch connector.
2. Check voltage between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check harness for open or short between stop lamp switch and fuse.
3.CHECK STOP LAMP SWITCH INPUT SIGNAL 2
1. Connect stop lamp switch connector.
2. Check voltage between BCM harness connector and ground.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2555 STOP LAMP BCM makes a comparison between the
upper voltage and lower voltage of stop
lamp switch. It judges from their values to
detect the malfunctioning circuit.  Harness or connectors
(Stop lamp switch circuit is open or
shorted.)
 Stop lamp switch
Fuse
BCM
(+)
(–)Voltage (V)
(Approx.)
BCM
Connector Terminal M71 105 Ground Battery voltage
(+) (–)Voltage (V)
(Approx.)
Sto p l am p s w it ch
Connector Terminal E115 1 Ground Battery voltage
Revision: 2010 May2011 QX56

SEC-74
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2555 STOP LAMP
Is the inspecting result normal?
YES >> GO TO 4.
NO >> GO TO 5.
4.REPLACE BCM
1. Replace BCM. Refer to BCS-81, "
Removal and Installation".
2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
>> INSPECTION END
5.CHECK STOP LAMP SWITCH CIRCUIT
1. Disconnect stop lamp switch connector.
2. Check continuity between stop lamp swit ch harness connector and BCM harness connector.
3. Check continuity between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace harness.
6.CHECK STOP LAMP SWITCH
Refer to SEC-74, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace stop lamp switch. Refer to BR-20, "
Removal and Installation".
7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006226224
1.CHECK STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch connector.
3. Check continuity between stop lamp switch terminals.
(+)
(–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M68 9 Ground Brake pedal Depressed Battery voltage
Not depressed 0
St op la mp sw i tc h BC M Continuity
Connector Terminal Connector Terminal
E115 2 M68 9 Existed
Stop lamp switch GroundContinuity
Connector Terminal
E115 2 Not existed
Revision: 2010 May2011 QX56

B26EF STEERING LOCK RELAYSEC-107
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B26EF STEERING LOCK RELAY
DTC LogicINFOID:0000000006226262
DTC DETECTION LOGIC
NOTE:
 If DTC B26EF is displayed with DTC U1000, firs t perform the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B26EF is displayed with DTC U1010, firs t perform the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Shift selector lever to the P position.
2. Turn ignition switch ON.
3. Turn ignition switch OFF.
4. Press driver side door switch and wait 2 seconds or more.
5. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-107, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226263
1.CHECK DTC OF IPDM E/R
Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Perform the diagnosis procedure rela ted to the detected DTC. Refer to PCS-22, "DTCIndex".
NO >> GO TO 2.
2.CHECK STEERING LOCK UNIT POWER SUPPLY
Check voltage between steering lock unit harness connector and ground.
NOTE:
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B26EF STRG LCK RELAY OFF BCM requests IPDM E/R to turn steering lock
relay ON, but BCM cannot receive steering
lock relay ON state signal from IPDM E/R
(CAN) within 2 seconds.  Harness or connectors
(CAN communication line is open
or shorted.)
 Harness or connector (Steering lock unit circuit is open or
shorted.)
 Steering lock unit
 IPDM E/R
(+)
(–) Condition Voltage (V)
(Approx.)
Steering lock unit
Connector Terminal
M12 1 Ground Ignition switch
OFF
A few seconds after
opening the driver door
Battery voltage
Ignition switch
LOCK Press the push-button
ignition switch
Battery voltage
Ignition switch ACC or ON 0
Revision: 2010 May2011 QX56