INFINITI QX56 2010 Factory Service Manual

THIRD SEATSE-79
< DISASSEMBLY AND ASSEMBLY >
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1. Headrest 2. Headrest holder, locking 3. Headrest holder, free
4. Seatback board 5. Seatback pad 6. Seatback frame assembly
7. Seatback cushion 8. Seatback trim cover 9. RH hinge cover
10. Seat motor/hinge assembly 11. Seat cushion 12. Seat cushion trim cover
13. Front link covers 14. Flex mat 15. Flex mat springs
16. Seat cushion frame assembly 17. Side link cover 18. LH hinge cover
Revision: April 20092010 QX56

SEC-1
BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY
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SECTION SEC
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CONTENTS
SECURITY CONTROL SYSTEM
WITH INTELLIGENT KEY SYSTEM
BASIC INSPECTION ....... .............................
4
DIAGNOSIS AND REPAIR WORKFLOW ..... .....4
Work Flow ........................................................... ......4
PRE-INSPECTION FOR DIAGNOSTIC ..............7
Basic Inspection .................................................. ......7
Vehicle Security Operation Check ............................7
INSPECTION AND ADJUSTMENT .....................9
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT .................................................... ......
9
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement .......
9
ECM RE-COMMUNICATING FUNCTION ............. ......9
ECM RE-COMMUNICATING FUNCTION : De-
scription .....................................................................
9
ECM RE-COMMUNICATING FUNCTION : Spe-
cial Repair Requirement ............................................
9
FUNCTION DIAGNOSIS ..............................10
INTELLIGENT KEY SYSTEM/ENGINE
START FUNCTIO N ........................................ ....
10
System Diagram .................................................. ....10
System Description .................................................10
Component Parts Location ......................................12
Component Description ...........................................13
INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS ..................................................................
14
System Diagram .................................................. ....14
System Description .................................................14
Component Parts Location ......................................16
Component Description ..........................................16
VEHICLE SECURITY SYSTEM .........................18
System Diagram .................................................. ....18
System Description .................................................18
Component Parts Location .................................. ....19
Component Description ...........................................20
DIAGNOSIS SYSTEM (BCM) ...........................21
COMMON ITEM ..................................................... ....21
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
21
IMMU ...................................................................... ....21
IMMU : CONSULT-III Function (BCM - IMMU) ........22
THEFT ALM ........................................................... ....22
THEFT ALM : CONSULT-III Function (BCM -
THEFT ALM) ....................................................... ....
22
DIAGNOSIS SYSTEM (INTELLIGENT KEY
UNIT) .................................................................
24
CONSULT-III Function (INTELLIGENT KEY) ..........24
COMPONENT DIAGNOSIS .........................26
U1000 CAN COMM CIRCUIT ...........................26
Description ........................................................... ....26
DTC Logic ................................................................26
Diagnosis Procedure ...............................................26
U1010 CONTROL UNIT (CAN) .........................27
Description ...............................................................27
DTC Logic ................................................................27
Diagnosis Procedure ...............................................27
Special Repair Requirement ....................................27
B2013 ID DISCORD I-KEY-STRG ....................28
Description ...............................................................28
DTC Logic ................................................................28
Diagnosis Procedure ...............................................28
B2190 NATS ANTENNA AMP. .........................31
Description ...............................................................31
DTC Logic ................................................................31
Diagnosis Procedure ...............................................31
Revision: April 20092010 QX56

SEC-2
B2191 DIFFERENCE OF KEY ..........................34
Description ........................................................... ...34
DTC Logic ...............................................................34
Diagnosis Procedure ..............................................34
B2192 ID DISCORD, IMMU-ECM ......................35
Description ........................................................... ...35
DTC Logic ...............................................................35
Diagnosis Procedure ..............................................35
B2193 CHAIN OF ECM-IMMU ...........................37
Description ........................................................... ...37
DTC Logic ...............................................................37
Diagnosis Procedure ..............................................37
B2194 ID DISCORD IMMU-I-KEY .....................38
Description ........................................................... ...38
DTC Logic ...............................................................38
Diagnosis Procedure ..............................................38
B2552 INTELLIGENT KEY ................................39
Description ........................................................... ...39
DTC Logic ...............................................................39
Diagnosis Procedure ..............................................39
Special Repair Requirement ...................................39
B2590 ID DISCORD BCM-I-KEY .................... ...40
Description ........................................................... ...40
DTC Logic ...............................................................40
Diagnosis Procedure ..............................................40
P1610 LOCK MODE ..........................................41
Description ........................................................... ...41
DTC Logic ...............................................................41
Diagnosis Procedure ..............................................41
P1611 ID DISCORD, IMMU-ECM ......................42
Description ........................................................... ...42
DTC Logic ...............................................................42
Diagnosis Procedure ..............................................42
P1612 CHAIN OF ECM-IMMU ...........................44
Description ........................................................... ...44
DTC Logic ...............................................................44
Diagnosis Procedure ..............................................44
P1614 CHAIN OF IMMU-KEY ...........................45
Description ........................................................... ...45
DTC Logic ...............................................................45
Diagnosis Procedure ..............................................45
P1615 DIFFRENCE OF KEY .............................48
Description ........................................................... ...48
DTC Logic ...............................................................48
Diagnosis Procedure ..............................................48
POWER SUPPLY AND GROUND CIRCUIT .....49
INTELLIGENT KEY UNIT ...................................... ...49
INTELLIGENT KEY UNIT : Diagnosis Procedure ...49
BCM ........................................................................ ...49
BCM : Diagnosis Procedure ....................................49
KEY CYLINDER SWITCH .................................51
Description ..............................................................51
Component Function Check ...................................51
Diagnosis Procedure ...............................................51
IGNITION KNOB SWITCH ................................53
Ignition Knob Switch Check ................................. ...53
HOOD SWITCH .................................................55
Diagnosis Procedure ............................................ ...55
HORN FUNCTION .............................................57
Symptom Table .................................................... ...57
VEHICLE SECURITY INDICATOR ...................58
Description ........................................................... ...58
Component Function Check ..................................58
Diagnosis Procedure ...............................................58
ECU DIAGNOSIS .......................................60
BCM (BODY CONTROL MODULE) ............... ...60
Reference Value .................................................. ...60
Terminal Layout ......................................................63
Physical Values .......................................................63
Wiring Diagram - VEHICLE SECURITY SYSTEM ...69
Wiring Diagram - IVIS .............................................80
Fail Safe .................................................................87
DTC Inspection Priority Chart ...............................88
DTC Index ..............................................................88
INTELLIGENT KEY UNIT ..................................90
Reference Value - Intelligent Key Unit ................. ...90
Reference Value - Steering Lock Solenoid .............93
Wiring Diagram - INTELLIGENT KEY SYSTEM/
ENGINE START FUNCTION - ................................
94
Fail Safe ...............................................................104
DTC Inspection Priority Chart .............................105
DTC Index ............................................................105
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
106
Reference Value .................................................. .106
Terminal Layout ....................................................108
Physical Values .....................................................109
Fail Safe ...............................................................113
DTC Index ............................................................114
SYMPTOM DIAGNOSIS ...........................115
INTELLIGENT KEY SYSTEM/ENGINE
START FUNCTION SYMPTOMS ................... ..
115
Symptom Table .................................................... .115
VEHICLE SECURITY SYSTEM SYMPTOMS ..116
Symptom Table .....................................................116
INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS SYMPTOMS ...........................................
117
Symptom Table .................................................... .117
Revision: April 20092010 QX56

SEC-3
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PRECAUTION ....... .....................................118
PRECAUTIONS .............................................. ..118
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
118
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ..
118
ON-VEHICLE REPAIR ...............................120
INTELLIGENT KEY UNIT ...............................120
Removal and Installation ..................................... ..120
Revision: April 20092010 QX56

SEC-4
< BASIC INSPECTION >[WITH INTELLIGENT KEY SYSTEM]
DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000005147063
OVERALL SEQUENCE
DETAILED FLOW
ALKIA0538GB
Revision: April 20092010 QX56

DIAGNOSIS AND REPAIR WORKFLOWSEC-5
< BASIC INSPECTION > [WITH INTELLIGENT KEY SYSTEM]
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1.GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred).
>> GO TO 2
2.CHECK DTC
1. Check DTC for Intelligent Key unit and BCM.
2. Perform the following procedure if DTC is displayed.
- Erase DTC.
- Study the relationship between the cause detected by DTC and the symptom described by the customer.
3. Check related service bulletins for information.
Is any symptom described and any DTC detected?
Symptom is described, DTC is displayed>>GO TO 3
Symptom is described, DTC is not displayed>>GO TO 4
Symptom is not described, DTC is displayed>>GO TO 5
3.CONFIRM THE SYMPTOM
Confirm the symptom described by the customer.
Connect CONSULT-III to the vehicle in “DATA MO NITOR” mode and check real-time diagnosis results.
Verify relation between the symptom and t he condition when the symptom is detected.
>> GO TO 5
4.CONFIRM THE SYMPTOM
Confirm the symptom described by the customer.
Connect CONSULT-III to the vehicle in “DATA MO NITOR” mode and check real-time diagnosis results.
Verify relation between the symptom and t he condition when the symptom is detected.
>> GO TO 6
5.PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC Confirmation Procedure for the display ed DTC, and then check that DTC is detected again.
If two or more DTCs are detected, refer to SEC-105, "
DTCInspectionPriorityChart" (Intelligent Key unit),
SEC-88, "
DTCInspectionPriorityChart" (BCM) and determine trouble diagnosis order.
Is DTC detected?
YES >> GO TO 8
NO >> Refer to GI-38, "
Intermittent Incident".
6.PERFORM BASIC INSPECTION
Perform Basic Inspection. Refer to SEC-7, "
Basic Inspection".
>> GO TO 7
7.DETECT MALFUNCTIONING SY STEM BY SYMPTOM TABLE
Detect malfunctioning system according to Sympto m Table based on the confirmed symptom in step 4.
>> GO TO 8
8.DETECT MALFUNCTIONING PA RT BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic Procedure is described based on open circuit inspection. A short circuit inspection is also
required for the circuit check in the Diagnostic Procedure.
>> GO TO 9
Revision: April 20092010 QX56

SEC-6
< BASIC INSPECTION >[WITH INTELLIGENT KEY SYSTEM]
DIAGNOSIS AND REPAIR WORKFLOW
9.REPAIR OR REPLACE THE MALFUNCTIONING PART
1. Repair or replace the malfunctioning part.
2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace- ment.
3. Check DTC. If DTC is displayed, erase it.
>> GO TO 10
10.FINAL CHECK
When DTC was detected in step 9, perform DTC Confirmation Procedure or Component Function Check
again, and then check that the malfunctions have been fully repaired.
When symptom was described by the customer, refer to the confirmed symptom in step 3 or 4, and check that
the symptom is not detected.
Does the symptom reappear?
YES (DTC is detected)>>GO TO 8
YES (Symptom remains)>>GO TO 6
NO >> Inspection End.
Revision: April 20092010 QX56

PRE-INSPECTION FOR DIAGNOSTICSEC-7
< BASIC INSPECTION > [WITH INTELLIGENT KEY SYSTEM]
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PRE-INSPECTION FOR DIAGNOSTIC
Basic InspectionINFOID:0000000005147151
The engine start function, door lock function, power di stribution system and NATS-IVIS/NVIS in the Intelligent
Key system are closely related to each other regarding control. Narrow down the functional area in question
by performing basic inspection to i dentify which function is malfunctioning. The vehicle security function can
operate only when the door lock and power distribution system are operating normally. Therefore, it is easy to
identify any factor unique to the vehicle security system by performing the vehicle security operation check
after basic inspection.
1.CHECK DOOR LOCK OPERATION
Check the door lock for normal operation with the Intelligent Key controller and door request switch.
Successful door lock operation with the Intelligent Key and request SW indicates that the remote keyless entry
receiver and inside key antenna required for engine start are functioning normally.
Identify the malfunctioning point by referring to the DLK section if the door cannot be unlocked.
Can the door be locked with the Intelligent Key and door request switch?
YES >> GO TO 2.
NO >> Refer to DLK-210, "
Symptom Table".
2.CHECK ENGINE STARTING
Check that the engine starts when operating the Intelligent Key.
Does the engine start?
YES >> GO TO 3.
NO >> Refer to SEC-115, "
Symptom Table".
3.CHECK STEERING LOCKING
Does the steering lock when operating door switch after switching the power supply from ON position (or ACC
position) to LOCK position?
If door switch is malfunctioning, BC M cannot lock the steering. If BCM does not detect DTC, steering lock unit
is normal.
Does steering lock?
YES >> GO TO 4.
NO >> Refer to DLK-71, "
ComponentFunctionCheck".
4.CHECK IGNITION KNOB SWITCH OPERATION
Press ignition knob to check switch operation.
Does the combination meter display any message?
YES >> GO TO 5.
NO >> Refer to SEC-53, "
Ignition Knob Switch Check".
5.CHECK VEHICLE SECURITY SYSTEM
Check the vehicle security system for normal operation.
The vehicle security function can operate only when t he door lock and power distribution functions are operat-
ing normally.
Therefore, it is easy to identify any factor unique to the vehicle security by performing the vehicle security
operation check after this basic inspection.
>> Go to SEC-7, "
Vehicle Security Operation Check".
Vehicle Security Operation CheckINFOID:0000000005147152
1.INSPECTION START
Turn ignition switch “OFF”.
NOTE:
Before starting operation check, open front windows.
>> GO TO 2.
Revision: April 20092010 QX56

SEC-8
< BASIC INSPECTION >[WITH INTELLIGENT KEY SYSTEM]
PRE-INSPECTION FOR DIAGNOSTIC
2.CHECK SECURITY INDICATOR LAMP
1. Lock doors using Intelligent Key or mechanical key.
2. Check that security indicator lamp illuminates for 30 seconds.
Does the security indicator lamp illuminate?.
YES >> GO TO 3.
NO >> Perform diagnosis and repair. Refer to SEC-58, "
ComponentFunctionCheck".
3.CHECK ALARM FUNCTION
1. After 30 seconds, security indicator lamp will start to blink.
2. Open any door or hood before unlocking with Intelligent Key or mechanical key, or open back door or glass hatch without the presence of Intelligent Key.
Does the alarm function properly?
YES >> GO TO 4.
NO >> Check the following. • The vehicle security system does not phase in alarm mode. Refer to SEC-116, "
Symptom
Table".
• Alarm (horn and headlamps) does not operate. Refer to SEC-116, "
Symptom Table".
4.CHECK ALARM CANCEL OPERATION
Unlock any door using Intelligent Key or mechanical key.
Does the alarm (horn and headlamps) stop?
YES >> Inspection End.
NO >> Check door lock function. Refer to DLK-21, "
INTELLIGENT KEY : System Description".
Revision: April 20092010 QX56

INSPECTION AND ADJUSTMENTSEC-9
< BASIC INSPECTION > [WITH INTELLIGENT KEY SYSTEM]
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INSPECTION AND ADJUSTMENT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement
INFOID:0000000005147064
Refer to the CONSULT-III Operation Manual.
ECM RE-COMMUNICATING FUNCTION
ECM RE-COMMUNICATING FUNCTION : DescriptionINFOID:0000000005147065
Performing following procedure can automatically perform re-communication of ECM and BCM, but only when
the ECM has been replaced with a new one (*1).
*1: New one means an ECM which 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 that is not brand new, refer to CONSULT-III Oper-
ation Manual.
• If multiple keys are attached to the key holder, separate them before work.
• Distinguish keys with unregistered key ID from those with registered ID.
ECM RE-COMMUNICATING FUNCTION : Special Repair RequirementINFOID:0000000005147066
1.PERFORM ECM RE-COMMUNICATING FUNCTION
1. Install ECM.
2. Using a registered key (*2), turn ignition switch to “ON”. *2: To perform this step, use the key that has been used before performing ECM replacement.
3. Maintain ignition switch in “ON” position for at least 5 seconds.
4. Turn ignition switch to “OFF”.
5. Start engine.
Can engine be started?
YES >> Procedure is completed.
NO >> Initialize control unit. Refer to CONSULT-III Operation Manual.
Revision: April 20092010 QX56