200 INFINITI QX56 2009 Factory Service Manual

SEC-24
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2013 ID DISCORD I-KEY-STRG
B2013 ID DISCORD I-KEY-STRG
DescriptionINFOID:0000000003775891
Intelligent Key unit performs the ID verification with the
steering lock solenoid and releases the steering lock if
both Intelligent Key unit and steering lock solenoid ID are same. Intelligent Key unit starts the communication
with the steering lock solenoid when Intelligent Key is carried into the vehicle and the ignition knob switch is
pressed.
DTC LogicINFOID:0000000003775892
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press the ignition knob switch.
2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-24, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000003775893
1.PERFORM INITIALIZATION
Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.
Can the system be initialized and can steering lo ck be released with re-registered mechanical key?
YES >> Steering lock solenoid was unregistered.
NO >> GO TO 2
2.CHECK STEERING LOCK SOLENOID POWER SUPPLY-1
1. Turn ignition switch OFF.
2. Disconnect steering lock solenoid connector.
3. Check voltage between steering lock solenoid harness connec- tor and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3.CHECK STEERING LOCK SOLENOID GROUND CIRCUIT
DTC No.Trouble diagnosis
name DTC detecting condition
Possible cause
B2013 STRG COMM 1 The ID verification results between Intelligent Key
unit and steering control unit are NG. The registra-
tion is necessary.
Steering lock solenoid
Te r m i n a l s
Voltage (V)(Approx.)
(+)
(–)
Steering lock solenoid con-
nector Te r m i n a l
M15 1Ground Battery voltage
WIIA1202E
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B2013 ID DISCORD I-KEY-STRGSEC-25
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Check continuity between steering lock solenoid harness connector
and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
4.CHECK STEERING LOCK SOLE NOID COMMUNICATION CIRCUITS
1. Disconnect Intelligent Key unit connector.
2. Check continuity between steer ing lock solenoid connector (A)
M15 terminals 2, 3 and Intelligent Key unit connector (B) M70
terminals 1, 32.
3. Check continuity between steer ing lock solenoid connector (A)
M15 terminals 2, 3 and ground.
Is the inspection result normal?
YES >> GO TO 5
NO >> Repair or replace harness.
5.CHECK INTELLIGENT KEY UNIT POWER SUPPLY-2
1. Connect Intelligent Key unit connector.
2. Check voltage between Intelligent Key unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6
NO >> Replace Intelligent Key unit. Refer to S E C - 111 ,
"Removal and Installation".
6.CHECK STEERING LOCK SOLE NOID COMMUNICATION CIRCUIT
1. Connect steering lock solenoid connector.
Te r m i n a l s
Continuity
(+)
(–)
Steering lock solenoid con-
nector Te r m i n a l
M15 4Ground Yes
WIIA1203E
Te r m i n a l s
Continuity
Steering lock sole-
noid connector Te r m i n a l
Intelligent Key unit
connector Te r m i n a l
M15 2
M70 1
Ye s
33 2
Te r m i n a l s Continuity
Steering lock solenoid connector Terminals
M15 2
Ground No
3
WIIA1206E
Te r m i n a l s
Voltage (V)
(Approx.)
(+)
(–)
Intelligent Key unit connector Terminal
M70 1Ground 5
WIIA1204E
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SEC-26
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2013 ID DISCORD I-KEY-STRG
2. Using an oscilloscope, check voltage between Intelligent Key
unit connector and ground.
Is the inspection result normal?
YES >> Replace Steering lock solenoid.
NO >> Replace Intelligent Key unit. Refer to S E C - 111 , "
Removal and Installation".
WIIA1205E
Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+)
(–)
Intelligent Key
unit connector Te r m i n a l
M70 32GroundSteering
lock Ignition knob is pushed
LOCK status
5
LOCK ⇔ UNLOCK
For 15 seconds after
UNLOCK 5
15 seconds later UN-
LOCK 0
SIIA1911J
JMKIA0433ZZ
Revision: December 20092009 QX56

B2190, P1614 NATS ANTENNA AMP.SEC-27
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2190, P1614 NATS ANTENNA AMP.
DescriptionINFOID:0000000003775894
Performs ID verification through BCM and NATS antenna amplifier when ignition knob switch is pressed.
Prohibits the release of steering lock or start of engine when an unregistered ID of mechanical key is used.
DTC LogicINFOID:0000000003775895
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Insert mechanical key into the key cylinder.
2. Press the ignition knob switch.
3. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-27, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000003775896
1.CHECK NATS ANTENNA AMP. INSTALLATION
Check NATS antenna amp. installation. Refer to S E C - 111 , "
Removal and Installation".
Is the inspection result normal?
YES >> GO TO 2
NO >> Reinstall NATS antenna amp. correctly.
2.CHECK NVIS (NATS) IGNITION KEY ID CHIP
Start engine with another registered NATS ignition key.
Does the engine start?
YES >> • Ignition key ID chip is malfunctioning. • Replace the ignition key.
• Perform initialization with CONSULT-III.For initialization, refer to “CONSULT-III Operation Manual”.
NO >> GO TO 3
3.CHECK POWER SUPPLY FOR NATS ANTENNA AMP.
1. Turn ignition switch ON.
2. Check voltage between NATS antenna amp. connector M21 terminal 1 and ground.
DTC No. Trouble diagnosis
name DTC detecting condition
Possible cause
B2190
NATS ANTENNA
AMP • Inactive communication between NATS antenna
amp. and BCM.
• Mechanical key is malfunctioning. • Harness or connectors
(The NATS antenna amp. circuit is
open or shorted)
• Mechanical key
• NATS antenna amp.
•BCM
P1614
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SEC-28
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2190, P1614 NATS ANTENNA AMP.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace fuse or harness.
4.CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect NATS antenna amp. connector.
3. Check continuity between NATS antenna amp. connector M21 terminal 3 and ground.
Is the inspection result normal?
YES >> GO TO 5
NO >> • Repair or replace harness. NOTE:
If harness is OK, replace BCM, refer to BCS-56,
"Removal and Installation". Perform initialization with
CONSULT-III. For initialization, refer to “CONSULT-III
Operation Manual”.
5.CHECK NATS ANTENNA AMP. SIGNAL LINE- 1
1. Connect NATS antenna amp. connector.
2. Turn ignition switch ON.
3. Check voltage between NATS antenna amp. connector M21 ter- minal 2 and ground with analog tester.
Is the inspection result normal?
YES >> GO TO 6
NO >> • Repair or replace harness. NOTE:
If harness is OK, replace BCM, refer to BCS-56, "
Removal and Installation". Perform initializa-
tion with CONSULT-III. For initialization, refer to “CONSULT-III Operation Manual”.
1 - Ground
: Battery voltage
LIIA1280E
3 - Ground: Continuity should exist.
LIIA1283E
LIIA1281E
Te r m i n a l s
Position of ignition key cylinder Voltage (V)
(Approx.)
( + ) ( - )
2G ro un d Before inserting ignition key
Battery voltage
After inserting ignition key Pointer of tester should move for approx. 30 seconds,
then return to battery voltage
Just after turning ignition switch ON Pointer of tester should move for approx. 1 second, then
return to battery voltage
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B2190, P1614 NATS ANTENNA AMP.SEC-29
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6.CHECK NATS ANTENNA AMP. SIGNAL LINE- 2
Check voltage between NATS antenna amp. connector M21 terminal
4 and ground with analog tester.
Is the inspection result normal?
YES >> NATS antenna amp. is malfunctioning.
NO >> • Repair or replace harness. NOTE:
If harness is OK, replace BCM, refer to BCS-56, "
Removal and Installation". Perform initializa-
tion with CONSULT-III. For initialization, refer to “CONSULT-III Operation Manual”.
LIIA1282E
Te r m i n a l s
Position of ignition key cylinder Voltage (V)
(Approx.)
( + ) ( - )
4G ro u nd Before inserting ignition key
Battery voltage
After inserting ignition key Pointer of tester should move for approx. 30 seconds,
then return to battery voltage
Just after turning ignition switch ON Pointer of tester should move for approx. 1 second, then
return to battery voltage
Revision: December 20092009 QX56

SEC-30
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2191, P1615 DIFFERENCE OF KEY
B2191, P1615 DIFFERENCE OF KEY
DescriptionINFOID:0000000003775897
Performs ID verification through BCM when ignition knob switch is pressed.
Prohibits the release of steering lock or start of engine when an unregistered ID of mechanical key is used.
DTC LogicINFOID:0000000003775898
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Insert mechanical key into the key cylinder.
2. Press the ignition knob switch.
3. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-30, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000003775899
1.PERFORM INITIALIZATION
Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES >> Mechanical key was unregistered.
NO >> BCM is malfunctioning. • Replace BCM. Refer to BCS-56, "
Removal and Installation".
• Perform initialization again
DTC No. Trouble diagnosis
name DTC detecting condition
Possible cause
B2191 DIFFERENCE OF
KEY The ID verification results between BCM and me-
chanical key are NG. The registration is necessary.
Mechanical key
P1615
Revision: December 20092009 QX56

B2192, P1611 ID DISCORD, IMMU-ECMSEC-31
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2192, P1611 ID DISCORD, IMMU-ECM
DescriptionINFOID:0000000003775900
BCM performs the ID verification with ECM that allows the engine to start. BCM starts the communication with
ECM if ignition switch is turned ON and starts the engi ne if the ID is OK. ECM prevents the engine from start-
ing if the ID is not registered.
DTC LogicINFOID:0000000003775901
DTC DETECTION LOGIC
NOTE:
• If DTC B2192 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
SEC-22, "
DTC Logic".
• If DTC B2192 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
SEC-23, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-31, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000003775902
1.PERFORM INITIALIZATION
Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES >> ID was unregistered.
NO >> GO TO 2
2.PEPLACE BCM
1. Replace BCM. Refer to BCS-56, "
Removal and Installation".
2. Perform initialization with CONSULT- III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES >> BCM is malfunctioning.
NO >> GO TO 3
3.PEPLACE ECM
1. Replace ECM. Refer to Removal and Installation.
2. Perform initialization with CONSULT- III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES >> ECM is malfunctioning.
NO >> GO TO 4
4.CHECK INTERMITTENT INCIDENT
Refer to GI-38, "
Intermittent Incident".
DTC No. Trouble diagnosis
name DTC detecting condition
Possible cause
B2192 ID DISCORD BCM-
ECM The ID verification results between BCM and ECM
are NG. The registration is necessary. •BCM
•ECM
P1611
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SEC-32
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2192, P1611 ID DI
SCORD, IMMU-ECM
>> Inspection End.
Revision: December 20092009 QX56

B2193, P1612 CHAIN OF ECM-IMMUSEC-33
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B2193, P1612 CHAIN OF ECM-IMMU
DescriptionINFOID:0000000003775903
BCM performs the ID verification with ECM that allows the engine to start. BCM starts the communication with
ECM if ignition switch is turned ON and starts the engi ne if the ID is OK. ECM prevents the engine from start-
ing if the ID is not registered.
DTC LogicINFOID:0000000003775904
DTC DETECTION LOGIC
NOTE:
• If DTC B2193 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
SEC-22, "
DTC Logic".
• If DTC B2193 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
SEC-23, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-33, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000003775905
1.REPLACE BCM
1. Replace BCM. Refer to BCS-56, "
Removal and Installation".
2. Perform initialization with CONSULT-III. For initialization, refer to “CONSULT-III Operation Manual”.
Does the engine start?
YES >> BCM was malfunctioning.
NO >> ECM is malfunctioning. • Replace ECM.
• Perform ECM re-communicating function.
DTC No. Trouble diagnosis
name DTC detecting condition
Possible cause
B2193 CHAIN OF BCM-
ECM Inactive communication between ECM and BCM • Harness or connectors
(The CAN communication line is
open or short)
•BCM
•ECM
P1612
Revision: December 20092009 QX56