ECO mode INFINITI QX56 2011 Factory Service Manual

DIAGNOSIS SYSTEM (BCM)SEC-27
< SYSTEM DESCRIPTION > [WITH INTELLIGENT KEY SYSTEM]
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ACTIVE TEST
IMMU
IMMU : CONSULT-III Function (BCM - IMMU)INFOID:0000000006226190
DATA MONITOR
ACTIVE TEST
WORK SUPPORT
Service Item Description
SECURITY ALARM SET This mode is able to confirm and change security alarm ON-OFF setting.
THEFT ALM TRG The switch which triggered vehicle security alarm is recorded.
This mode is able to confirm and erase the record of vehicle security alarm.
The trigger data can be erased by touching “CLEAR” on CONSULT-III screen.
Test Item Description
THEFT IND This test is able to check security indicator lamp operation. Security indicator lamp is turned on
when “ON” on CONSULT-III screen is touched.
VEHICLE SECURITY HORN This test is able to check horn operation. Horn is activated for 0.5 seconds after “ON” on CONSULT-
III screen is touched.
HEADLAMP(HI) This test is able to check headlamp operation. Headlamps are activated for 0.5 seconds after “ON”
on CONSULT-III screen is touched.
FLASHER This test is able to check hazard warning lamp operation. Hazard warning lamps are activated after
“ON” on CONSULT-III screen is touched.
Monitor item Content
CONFRM ID ALL
Indicates [YET] at all time.
Switches to [DONE] when a registered Intelligent Key backside is contacted to push-button ignition
switch.
CONFIRM ID4
CONFIRM ID3
CONFIRM ID2
CONFIRM ID1
NOT REGISTERED
Indicates [ID OK] when key ID that is registered is received or is not yet received.
Indicates [ID NG] when key ID that is not registered is received.
TP 4
Indicates the number of IDs that are registered.
TP 3
TP 2
TP 1
PUSH SW Indicates [ON/OFF] condition of push-button ignition switch.
Test item Description
THEFT IND This test is able to check security indicator lamp operation.
Security indicator lamp is turned on when “ON” on CONSULT-III screen touched.
Service item Description
CONFIRM DONGLE ID It is possible to check that dongle unit is applied to the vehicle.
Revision: 2010 May2011 QX56

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNITSEC-51
< BASIC INSPECTION > [WITH INTELLIGENT KEY SYSTEM]
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ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ECM
ECM : DescriptionINFOID:0000000006226197
Performing the following procedure can automatically activate recommunication of ECM and BCM, but only
when the ECM is replaced with a new one*.
*: New one means a virgin ECM that has never been energized on-board.
(In this step, initialization procedur e by CONSULT-III is not necessary)
NOTE:
 When registering new Key IDs or replacing the ECM th at is not brand new, refer to CONSULT-III Oper-
ation Manual NATS-IVIS/NVIS.
 If multiple keys are attached to the key hold er, separate them before beginning work.
 Distinguish keys with unregistered key IDs from those with registered IDs.
ECM : Work ProcedureINFOID:0000000006226198
1.PERFORM ECM RECOMMUNICATING FUNCTION
1. Install ECM.
2. Contact backside of registered Intelligent key* to push-button ignition switch, then turn power supply posi-
tion to ON.
*: To perform this step, use the key that is used before performing ECM replacement.
3. Maintain power supply position in t he ON position for at least 5 seconds.
4. Turn power supply position to OFF.
5. Check that the engine starts.
>> GO TO 2.
2.PERFORM ADDITIONAL SERVICE WHEN REPLACING ECM
Perform EC-143, "
Work Procedure".
>> END
BCM
BCM : DescriptionINFOID:0000000006397657
BEFORE REPLACEMENT
When replacing BCM, save or print current vehicle specification with CONSULT-III configuration before
replacement.
NOTE:
If “READ CONFIGURATION” can not be used, use the “WRITE CONFIGURATION - Manual selection” after
replacing BCM.
AFTER REPLACEMENT
CAUTION:
 When replacing BCM, you must perform “W RITE CONFIGURATION” with CONSULT-III.
- Complete the procedure of “WRITE CONFIGURATION” in order.
- If you set incorrect “WRITE CONF IGURATION”, incidents might occur.
- Configuration is different for each vehicle model. Confirm conf iguration of each vehicle model.
 When replacing BCM, perform the system initialization (NATS).
BCM : Work ProcedureINFOID:0000000006397658
1.SAVING VEHICLE SPECIFICATION
CONSULT-III Configuration
Perform “READ CONFIGURATION” to save or prin t current vehicle specification. Refer to BCS-67, "
CONFIG-
URATION (BCM) : Description".
NOTE:
Revision: 2010 May2011 QX56

P1610 LOCK MODESEC-53
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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DTC/CIRCUIT DIAGNOSIS
P1610 LOCK MODE
DescriptionINFOID:0000000006226201
ECM forcibly switches to the mode that inhibits engi ne start, when engine start operation is performed 5 times
or more while communication between ECM and BCM is not normal.
DTC LogicINFOID:0000000006226202
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 “ENGINE” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-53, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226203
1.CHECK ENGINE START FUNCTION
1. Check that DTC except fo r DTC P1610 is not detected.
If detected, erase the DTC after fixing.
2. Turn ignition switch OFF.
3. Contact the registered Intelligent Key backside to push-button ignition switch and wait 5 seconds.
4. Turn ignition switch ON.
5. Turn ignition switch OFF and wait 5 seconds.
6. Repeat steps 3 and 5 twice (a total of 3 times).
7. Check that engine can start.
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible causeP1610 LOCK MODE When ECM detects a communication malfunction between
ECM and BCM 5 times or more.
—
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-76
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2556 PUSH-BUTTON IGNITION SWITCH
B2556 PUSH-BUTTON IGNITION SWITCH
DTC LogicINFOID:0000000006226225
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press push-button ignition switch under the following condition.
- Brake pedal: Not depressed
2. Release push-button ignition switch and wait 100 seconds or more.
3. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-76, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226226
1.CHECK PUSH-BUTTON IGNITION SWITCH INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect push-button ignition switch connector.
3. Check voltage between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 2.
2.CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT
1. Disconnect BCM connector and IPDM E/R connector.
2. Check continuity between push-button ignition switch harness connector and BCM harness connector.
3. Check continuity between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause B2556 PUSH-BTN IGN SW BCM detects the push-button ignition switch
stuck at ON for 100 seconds or more.  Harness or connectors
(Push-button ignition switch circuit is
shorted.)
 Push-button ignition switch
BCM
(+)
(–)Voltage (V)
(Approx.)
Push-button ignition switch
Connector Terminal M101 4 Ground 12
Push-button ignition switch BCM Continuity
Connector Terminal Connector Terminal
M101 4 M71 100 Existed
Push-button ignition switch GroundContinuity
Connector Terminal
M101 4 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

B2601 SHIFT POSITIONSEC-79
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2601 SHIFT POSITION
DTC LogicINFOID:0000000006226230
DTC DETECTION LOGIC
NOTE:
 If DTC B2601 is displayed with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B2601 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. Shift the selector lever to the P position.
2. Turn ignition switch ON and wait 2 seconds or more.
3. Shift the selector lever to any position other than P, and wait 2 seconds or more.
4. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-79, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226231
1.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 4.
NO >> GO TO 2.
2.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.
3. Check continuity between A/T shift select or (detention switch) harness connector and ground.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2601 SHIFT POSITION When there is a difference between P range
signal from A/T shift selector (detention switch)
and P position signal from IPDM E/R (CAN).  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)
BCM
(+)
(–)Voltage (V)
(Approx.)
A/T shift selector (detention switch)
Connector Terminal M57 13 Ground 12
A/T shift selector (detention switch) BCM Continuity
Connector Terminal Connector Terminal
M57 13 M71 104 Existed
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

B2603 SHIFT POSITIONSEC-85
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2603 SHIFT POSITION
DTC LogicINFOID:0000000006226236
DTC DETECTION LOGIC
NOTE:
 If DTC B2603 is displayed with DTC B2601, first perform the trouble diagnosis for DTC B2601. Refer to SEC-79, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE 1
1. Shift the selector lever to the P position.
2. Turn ignition switch ON and wait 1 second or more.
3. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-85, "Diagnosis Procedure".
NO >> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE 2
1. Shift the selector lever to any positi on other than P, 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-85, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226237
1.INSPECTION START
Perform inspection in accordance with procedure that confirms DTC.
Which procedure confirms DTC?
DTC confirmation procedure 1>>GO TO 2.
DTC confirmation procedure 2>>GO TO 6.
2.CHECK DTC OF TCM
Check DTC in “Self Diagnostic Result ” mode of “TCM” using CONSULT-III.
Is DTC detected?
YES >> Perform the trouble diagnosis rela ted to the detected DTC. Refer to TM-78, "DTC Index".
NO >> GO TO 3.
3.CHECK BCM INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector and ground.
DTC No. Trouble diagnosis name DTC detecting condition Possible causes
B2603 SHIFT POSI STATUS BCM detects the following status when ignition
switch is in the ON position.
 P position signal from TCM: approx. 0 V
 A/T shift selector (detention switch) signal:
approx. 0 V  Harness or connector
[A/T shift selector (detention switch)
circuit is open or shorted.]
 Harness or connectors (TCM circuit is open or shorted.)
 A/T shift selector (detention switch)
 A/T assembly (TCM)
BCM
Revision: 2010 May2011 QX56

B2604 SHIFT POSITIONSEC-89
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2604 SHIFT POSITION
DTC LogicINFOID:0000000006226239
DTC DETECTION LOGIC
NOTE:
 If DTC B2604 is displayed with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B2604 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. Shift the selector lever to the P position.
2. Turn ignition switch ON and wait 5 seconds or more.
3. Shift the selector lever to the N position and wait 5 seconds or more.
4. Shift the selector lever to any position ot her than P and N, and wait 5 seconds or more.
5. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-89, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226240
1.CHECK DTC OF TCM
Check DTC in “Self Diagnostic Result ” mode of “TCM” using CONSULT-III.
Is DTC detected?
YES >> Perform the trouble diagnosis rela ted to the detected DTC. Refer to TM-78, "DTC Index".
NO >> GO TO 2.
2.CHECK BCM INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 4.
3.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.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2604 PNP/CLUTCH SW The following states are detected for 5 seconds
while ignition switch is ON.
 P/N position signal is sent from TCM but shift
position signal input (CAN) from TCM is other
than P and N
 P/N position signal is not sent from TCM but
shift position signal input (CAN) from TCM is P
or N  Harness or connectors
(CAN communication line is open
or shorted.)
 Harness or connectors
(TCM circuit is open or shorted.)
TCM
BCM
(+)
(–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M71 102 Ground Selector lever P or N position 12
Other than above 0
Revision: 2010 May2011 QX56