2011 INFINITI QX56 check engine

P1612 CHAIN OF ECM-IMMUSEC-55
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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P1612 CHAIN OF ECM-IMMU
DTC LogicINFOID:0000000006226206
DTC DETECTION LOGIC
NOTE:
 If DTC P1612 is displayed with DTC U1000 (for BC M), first perform the trouble diagnosis for DTC U1000.
Refer to BCS-70, "
DTC Logic".
 If DTC P1612 is displayed with DTC U1010 (for BC M), first perform the trouble diagnosis for DTC U1010.
Refer to BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check DTC in “Self Diagnostic Result” mode of “ENGINE” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-55, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226207
1.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.
Can the system be initialized and can the engine be started with registered Intelligent Key?
YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE ECM
1. Replace ECM. Refer to EC-535, "
Removal and Installation".
2. Perform “ADDITIONAL SERVICE WHEN REPLACING ECM”. Refer to EC-143, "
Work Procedure".
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1612 CHAIN OF ECM-IMMU Inactive communication between ECM
and BCM  Harness or connectors
(The CAN communication line is open or
shorted.)
BCM
ECM
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

SEC-60
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2192 ID DISCORD, IMMU-ECM
B2192 ID DISCORD, IMMU-ECM
DTC LogicINFOID:0000000006226210
DTC DETECTION LOGIC
NOTE:
 If DTC B2192 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B2192 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-60, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226211
1.PERFORM INITIALIZATION
Perform initialization of BCM and reregistration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
Can the system be initialized and can the engine be started with reregistered Intelligent Key?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK SELF-DIAGNOSIS RESULT
1. Select “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
2. Erase DTC.
3. Perform DTC CONFIRMATION PROCEDURE for DTC B2192. Refer to SEC-60, "
DTC Logic".
Is DTC detected?
YES >> GO TO 3.
NO >> INSPECTION END
3.REPLACE BCM
1. Replace BCM. Refer to BCS-81, "
Removal and Installation".
2. Perform initialization of BCM and reregistration of all Intelligent Keys using CONSULT-III. For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
Can the system be initialized and can the engi ne be started with registered Intelligent Key?
YES >> INSPECTION END
NO >> GO TO 4.
4.REPLACE ECM
1. Replace ECM. Refer to EC-535, "
Removal and Installation".
2. Perform “ADDITIONAL SERVICE WHEN REPLACING ECM”. Refer to EC-143, "
Work Procedure".
>> INSPECTION END
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. Harness or connectors
(The CAN communication line is open
or shorted.)
BCM
ECM
Revision: 2010 May2011 QX56

B2193 CHAIN OF ECM-IMMUSEC-61
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2193 CHAIN OF ECM-IMMU
DTC LogicINFOID:0000000006226212
DTC DETECTION LOGIC
NOTE:
 If DTC B2193 is displayed with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B2193 is displayed with DTC U1010, first per form the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-61, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226213
1.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.
Can the system be initialized and can the engine be started with registered Intelligent Key?
YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE ECM
1. Replace ECM. Refer to EC-535, "
Removal and Installation".
2. Perform “ADDITIONAL SERVICE WHEN REPLACING ECM”. Refer to EC-143, "
Work Procedure".
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2193 CHAIN OF BCM-ECM Inactive communication between BCM
and ECM  Harness or connectors
(The CAN communication line is open or
shorted.)
BCM
ECM
Revision: 2010 May2011 QX56

SEC-62
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2195 ANTI-SCANNING
B2195 ANTI-SCANNING
DTC LogicINFOID:0000000006226214
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-62, "Diagnosis Procedure".
NO >> INSPECTION END.
Diagnosis ProcedureINFOID:0000000006226215
1.CHECK SELF DIAGNOSTIC RESULT 1
1. Select “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
2. Erase DTC.
3. Perform DTC CONFIRMATION PROCEDURE for DTC B2195. Refer to SEC-62, "
DTC Logic".
Is DTC detected?
YES >> GO TO 2.
NO >> INSPECTION END
2.CHECK EQUIPMENT OF THE VEHICLE
Check that unspecified accessory part re lated to engine start is not installed.
Is unspecified accessory part related to engine start installed?
YES >> GO TO 3.
NO >> GO TO 4.
3.CHECK SELF DIAGNOSTIC RESULT 2
1. Obtain the customers approval to remove unspecif ied accessory part related to engine start, and then
remove it.
2. Select “Self Diagnostic Result” of “BCM” using CONSULT-III.
3. Erase DTC.
4. Perform DTC CONFIRMATION PROCEDURE for DTC B2195. Refer to SEC-62, "
DTC Logic".
Is DTC detected?
YES >> GO TO 4.
NO >> INSPECTION END
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
DTC No. Trouble diagnosis name DTC detecting condition Possible cause B2195 ANTI-SCANNING ID verification between BCM and ECM that is
out of the specified specification is detected. ID verification request out of the
specified specification
Revision: 2010 May2011 QX56

B2196 DONGLE UNITSEC-63
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2196 DONGLE UNIT
DescriptionINFOID:0000000006226660
BCM performs ID verification between BCM and dongle unit.
When verification result is OK, BCM permits cranking.
DTC LogicINFOID:0000000006226661
DTC DETECTION LOGIC
NOTE:
 If DTC B2196 is displayed with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B2196 is displayed with DTC U1010, first per form the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Turn ignition switch OFF.
3. Turn ignition switch ON.
4. Check “Self-diagnosis result” using CONSULT-III.
Is the DTC detected?
YES >> Refer to SEC-63, "Diagnosis Procedure".
NO >> INSPECTION END.
Diagnosis ProcedureINFOID:0000000006226662
1.PERFORM INITIALIZATION
1. Perform initialization of BCM and reregistration of all Intelligent Keys using CONSULT-III. For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
2. Start the engine.
Dose the engine start?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK DONGLE UNIT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and dongle unit connector.
3. Check continuity between BCM harness connector and dongle unit harness connector.
4. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2196 DONGLE NG The ID verification results between BCM
and dongle unit is NG.  Harness or connectors
(Dongle unit circuit is open or shorted.)
 Dongle unit
BCM Dongle unit Continuity
Connector Terminal Connector Terminal
M68 24 M142 7 Existed
BCM GroundContinuity
Connector Terminal
M68 24 Not existed
Revision: 2010 May2011 QX56

SEC-78
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2557 VEHICLE SPEED
B2557 VEHICLE SPEED
DTC LogicINFOID:0000000006226228
DTC DETECTION LOGIC
NOTE:
 If DTC B2557 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B2557 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and wait 10 seconds or more.
2. Drive the vehicle at a vehicle speed of 10 km/h (6.2 MPH) or more for 10 seconds or more.
3. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-78, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226229
1.CHECK DTC OF “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
Check DTC in “Self Diagnostic Result ” mode of “ABS” using CONSULT-III.
Is DTC detected?
YES >> Perform the trouble diagnosis relat ed to the detected DTC. Refer to BRC-51, "DTC Index".
NO >> GO TO 2.
2.CHECK DTC OF “COMBINATION METER”
Check DTC in “Self Diagnostic Result” m ode of “METER/M&A” using CONSULT-III.
Is DTC detected?
YES >> Perform the trouble diagnosis relat ed to the detected DTC. Refer to MWI-43, "DTC Index".
NO >> GO TO 3.
3.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible causes
B2557 VEHICLE SPEED BCM detects one of the following conditions for 10
seconds continuously.
 Vehicle speed signal from combination meter is 10
km/h (6.2 MPH) or more, and vehicle speed signal
from ABS actuator and electric unit (control unit) is
4 km/h (2.5 MPH) or less.
 Vehicle speed signal from combination meter is 4 km/h (2.5 MPH) or less, and vehicle speed signal
from ABS actuator and electric unit (control unit) is
10 km/h (6.2 MPH) or more.  Harness or connectors
(The CAN communication line is
open or shorted.)
 Combination meter
 ABS actuator and electric unit
(control unit)
Revision: 2010 May2011 QX56

SEC-82
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2602 SHIFT POSITION
B2602 SHIFT POSITION
DTC LogicINFOID:0000000006226233
DTC DETECTION LOGIC
NOTE:
 If DTC B2602 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B2602 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine.
2. Drive vehicle at a speed of 4 km/h (2.5 MPH) or more for 10 seconds or more.
3. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-82, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226234
1.CHECK DTC OF COMBINATION METER
Check DTC in “Self Diagnostic Result” m ode of “METER/M&A” using CONSULT-III.
Is DTC detected?
YES >> Perform the trouble diagnosis relat ed to the detected DTC. Refer to MWI-43, "DTC Index".
NO >> GO TO 2.
2.CHECK A/T SHIFT SELECTOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect A/T shift selector (detention switch) connector.
3. Check voltage between A/T shift selector (detention switch) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 3.
3.CHECK A/T SHIFT SELECTOR POWER SUPPLY CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between A/T shift selector ( detention switch) harness connector and BCM harness con-
nector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2602 SHIFT POSITION BCM detects the following status for 10 seconds.
 Selector lever is in the P position
 Vehicle speed is 4 km/h (2.5 MPH) or more
 Ignition switch is in the ON position  Harness or connectors
(CAN communication line is open or
shorted.)
 Harness or connectors [A/T shift selector (detention switch)
circuit is open or shorted.]
 A/T shift selector (detention switch)
 Combination meter
BCM
(+)
(–)Voltage (V)
(Approx.)
A/T shift selector (detention switch)
Connector Terminal M57 13Ground12
Revision: 2010 May2011 QX56