ground INFINITI QX56 2011 Factory Service Manual

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

P1614 CHAIN OF IMMU-KEYSEC-57
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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3. Check continuity between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-32, "Removal and Installation".
NO >> Repair or replace harness.
4.CHECK NATS ANTENNA AMP. OUTPUT SIGNAL 1
1. Connect NATS antenna amp. connector.
2. Disconnect BCM connector.
3. Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.CHECK NATS ANTENNA AMP. OUTPUT SIGNAL CIRCUIT 1
1. Disconnect NATS antenna amp. connector.
2. Check continuity between BCM harness connector and NATS antenna amp. connector.
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace NATS antenna amp. Refer to SEC-155, "Removal and Installation".
NO >> Repair or replace harness.
6.CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL 1
1. Connect BCM connector.
2. Check voltage between BCM harness connector and ground using analog tester.
Is the inspection result normal?
IPDM E/R NATS antenna amp. Continuity
Connector Terminal Connector Terminal
E14 42 M26 1 Existed
IPDM E/R GroundContinuity
Connector Terminal
E14 42 Not existed
(+) (–)Voltage (V)
(Approx.)
BCM
Connector Terminal M68 21 Ground 12
BCM NATS antenna amp. Continuity
Connector Terminal Connector Terminal
M6821M26 2Existed
BCM GroundContinuity
Connector Terminal
M68 21 Not existed
(+) (–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M68 21 Ground Contact Intelligent Key backside to
push-button ignition switch, then turn
ignition switch ON.Just after pressing push-button ignition
switch, pointer of analog tester should
move.
Revision: 2010 May2011 QX56

SEC-58
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
P1614 CHAIN OF IMMU-KEY
YES >> GO TO 7.
NO >> Replace NATS antenna amp. Refer to
SEC-155, "
Removal and Installation".
7.CHECK NATS ANTENNA AMP. OUTPUT SIGNAL 2
1. Disconnect BCM connector.
2. Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 8.
8.CHECK NATS ANTENNA AMP. OUTPUT SIGNAL CIRCUIT 2
1. Disconnect NATS antenna amp. connector.
2. Check continuity between BCM harness connector and NATS antenna amp. connector.
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace NATS antenna amp. Refer to SEC-155, "Removal and Installation".
NO >> Repair or replace harness.
9.CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL 2
1. Connect BCM connector.
2. Check voltage between BCM harness connector and ground using analog tester.
Is the inspection result normal?
YES >> GO TO 10.
NO >> Replace NATS antenna amp. Refer to SEC-155, "
Removal and Installation".
10.CHECK NATS ANTENNA AMP. GROUND CIRCUIT
1. Disconnect NATS antenna amp. connector.
2. Check continuity between NATS antenna amp. harness connector and ground.
Is the inspection result normal?
(+) (–)Voltage (V)
(Approx.)
BCM
Connector Terminal M68 25Ground12
BCM NATS antenna amp. Continuity
Connector Terminal Connector Terminal
M6825M26 3Existed
BCM GroundContinuity
Connector Terminal
M68 25 Not existed
(+) (–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M68 25 Ground Contact Intelligent Key backside to
push-button ignition switch, then turn
ignition switch ON.Just after pressing push-button ignition
switch, pointer of analog tester should
move.
NATS antenna amp.
GroundContinuity
Connector Terminal
M26 4 Existed
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-64
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2196 DONGLE UNIT
YES >> GO TO 3.
NO >> Repair or replace harness.
3.CHECK DONGLE UNIT GROUND CIRCUIT
Check continuity between dongle unit harness connector and ground.
Is the inspection result normal?
YES >> Replace dongle unit.
NO >> Repair or replace harness.
Dongle unit
GroundContinuity
Connector Terminal
M142 1 Existed
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

SEC-66
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2198 NATS ANTENNA AMP.
3. Check continuity between IP
DM E/R harness connector and ground.
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-32, "Removal and Installation".
NO >> Repair or replace harness.
4.CHECK NATS ANTENNA AMP. OUTPUT SIGNAL 1
1. Connect NATS antenna amp. connector.
2. Disconnect BCM connector.
3. Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.CHECK NATS ANTENNA AMP. OUTPUT SIGNAL CIRCUIT 1
1. Disconnect NATS antenna amp. connector.
2. Check continuity between BCM harness connector and NATS antenna amp. connector.
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace NATS antenna amp. Refer to SEC-155, "Removal and Installation".
NO >> Repair or replace harness.
6.CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL 1
1. Connect BCM connector.
2. Check voltage between BCM harness connector and ground using analog tester.
Is the inspection result normal?
IPDM E/R NATS antenna amp. Continuity
Connector Terminal Connector Terminal
E14 42 M26 1 Existed
IPDM E/R GroundContinuity
Connector Terminal
E14 42 Not existed
(+) (–)Voltage (V)
(Approx.)
BCM
Connector Terminal M68 21Ground12
BCM NATS antenna amp. Continuity
Connector Terminal Connector Terminal
M6821M26 2Existed
BCM GroundContinuity
Connector Terminal
M68 21 Not existed
(+) (–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M68 21 Ground Contact Intelligent Key backside to
push-button ignition switch, then turn
ignition switch ON.Just after pressing push-button ignition
switch, pointer of analog tester should
move.
Revision: 2010 May2011 QX56

B2198 NATS ANTENNA AMP.SEC-67
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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YES >> GO TO 7.
NO >> Replace NATS antenna amp. Refer to SEC-155, "
Removal and Installation".
7.CHECK NATS ANTENNA AMP. OUTPUT SIGNAL 2
1. Disconnect BCM connector.
2. Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 8.
8.CHECK NATS ANTENNA AMP. OUTPUT SIGNAL CIRCUIT 2
1. Disconnect NATS antenna amp. connector.
2. Check continuity between BCM harness connector and NATS antenna amp. connector.
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace NATS antenna amp. Refer to SEC-155, "Removal and Installation".
NO >> Repair or replace harness.
9.CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL 2
1. Connect BCM connector.
2. Check voltage between BCM harness connector and ground using analog tester.
Is the inspection result normal?
YES >> GO TO 10.
NO >> Replace NATS antenna amp. Refer to SEC-155, "
Removal and Installation".
10.CHECK NATS ANTENNA AMP. GROUND CIRCUIT
1. Disconnect NATS antenna amp. connector.
2. Check continuity between NATS antenna amp. harness connector and ground.
Is the inspection result normal?
(+)
(–)Voltage (V)
(Approx.)
BCM
Connector Terminal M68 25 Ground 12
BCM NATS antenna amp. Continuity
Connector Terminal Connector Terminal
M68 25 M26 3 Existed
BCM GroundContinuity
Connector Terminal
M68 25 Not existed
(+) (–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M68 25 Ground Contact Intelligent Key backside to
push-button ignition switch, then turn
ignition switch ON.Just after pressing push-button ignition
switch, pointer of analog tester should
move.
NATS antenna amp.
GroundContinuity
Connector Terminal
M26 4 Existed
Revision: 2010 May2011 QX56

SEC-70
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2014 CHAIN OF STRG-IMMU
B2014 CHAIN OF STRG-IMMU
DTC LogicINFOID:0000000006226220
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Lock steering. NOTE:
3. Press the push-button ignition switch.
4. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-70, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226221
1.CHECK STEERING LOCK UNIT POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect steering lock unit connector.
3. Check voltage between steering lock unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK STEERING LOCK UNIT POWER SUPPLY CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between steering lock unit harness connector and BCM harness connector.
3. Check continuity between steering lock unit harness connector and ground.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2014 CHAIN OF S/L-BCM Inactive communication between steering
lock unit and BCM  Harness or connectors
(Steering lock unit circuit is open or
shorted.)
 Steering lock unit
BCM
To lock the steering 1. Set the selector lever in the P position.
2. Turn the power supply position to the OFF position.
3. Press any door switch.
To unlock the steering 1. Set the selector lever in the P position.
2. Press the push-button ignition switch with brake pedal not depressed.
(+)
(–) Condition Voltage (V)
(Approx.)
Steering lock unit
Connector Terminal
M12 7 Ground Ignition switch OFF or ACC 12
ON 0
Steering lock unit BCM Continuity
Connector Terminal Connector Terminal
M12 7 M71 95 Existed
Revision: 2010 May2011 QX56

B2014 CHAIN OF STRG-IMMUSEC-71
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace harness.
3.CHECK STEERING LOCK UNIT GROUND CIRCUIT
Check continuity between steering lock unit and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace harness.
4.CHECK STEERING LOCK UNI T COMMUNICATION SIGNAL
1. Connect steering lock unit connector and BCM connector.
2. Read voltage signal between steering lock unit harness connector and ground.
NOTE:
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 6.
5.REPLACE STEERING LOCK UNIT
1. Replace steering lock unit.
2. Perform the service procedure for steering lock unit replacement. Refer to CONSULT-III Operation Man-
ual NATS-IVIS/NVIS.
Steering lock unit
GroundContinuity
Connector Terminal
M12 7 Not existed
Steering lock unit
GroundContinuity
Connector Terminal
M12 5
Existed
6
(+)
(–) Condition Voltage (V)
(Approx.)
Steering lock unit
Connector Terminal
M12 2 Ground Steering lock unit Lock status 12
Lock or unlock
For 15 seconds after
unlock
12
15 seconds or later
after unlock. 0
To lock the steering 1. Set the selector lever in the P position.
2. Turn the power supply position to the OFF position.
3. Press any door switch.
To unlock the steering 1. Set the selector lever in the P position.
2. Press the push-button ignition switch with brake pedal not depressed.
JMKIA0066GB
Revision: 2010 May2011 QX56