2008 INFINITI QX56 display

SCS-22
< COMPONENT DIAGNOSIS >
HEIGHT SENSOR SIGNAL CIRCUIT
HEIGHT SENSOR SIGNAL CIRCUIT
DescriptionINFOID:0000000001731990
Supplies vehicle height input to the suspension control unit.
Component Function CheckINFOID:0000000001731991
1.CHECK HEIGHT SENSOR OPERATION
CONSULT-III
1. Select "HEIGT SEN" of AIR LEVELIZER data monitor test item.
2. While monitoring test item, add or take away weight from the rear of the vehi cle. Check that the voltage
value changes with vehicle height.
Is the HEIGHT SEN data monitor responding normally?
YES >> Height sensor is operating normally.
NO >> Refer to SCS-22, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001731992
1.CHECK HEIGHT SENSOR POWER AND GROUND SUPPLY
Check height sensor power and ground supply. Refer to SCS-18, "
HEIGHT SENSOR : Diagnosis Procedure"
Are the inspection results normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK HEIGHT SENSOR SIGNAL CIRCUIT
1. Disconnect suspension control unit connector B3 and height sensor connector C8.
2. Check continuity between suspension control unit connector B3 (A) terminal 3 and height sensor connector C8 (B) terminal 2.
3. Check continuity between display unit harness connector B3 (A) terminal 3 and ground.
Are the continuity results as specified?
YES >> Replace the height sensor. Refer to RSU-26, "Removal and Installation"
NO >> Repair harness or connector.HEIGHT SEN : Voltage changes with vehicle height
AB
Continuity
Connector Terminal Connector Terminal
B33C82 Yes
A —Continuity
Connector Terminal
B3 3Ground No
ALEIA0035GB
Revision: March 2010 2008 QX56

SUSPENSION CONTROL UNITSCS-33
< ECU DIAGNOSIS >
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DTC IndexINFOID:0000000001732001
Self-diagnosis results display item
ALEIA0043GB
CONSULT-III display MalfunctionReference page
Vehicle height sensor [C1801] Vehicle height sensor voltage is less than 0.2V or greater than
4.8V for more than 60 seconds. SCS-9,
"DiagnosisProcedure"
Revision: March 2010
2008 QX56

SEC-4
< BASIC INSPECTION >[WITH INTELLIGENT KEY SYSTEM]
DIAGNOSIS AND REPAIR WORKFLOW
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 the 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 the 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-97, "
DTCInspectionPriorityChart" (Intelligent Key unit),
SEC-79, "
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-6, "
Basic Inspection".
>> GO TO 7
7.DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE
Detect malfunctioning system according to Symptom Table based on the confirmed symptom in step 4.
>> GO TO 8
8.DETECT MALFUNCTIONING PART 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: March 2010 2008 QX56

DIAGNOSIS AND REPAIR WORKFLOWSEC-5
< BASIC INSPECTION > [WITH INTELLIGENT KEY SYSTEM]
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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: March 2010 2008 QX56

SEC-6
< BASIC INSPECTION >[WITH INTELLIGENT KEY SYSTEM]
PRE-INSPECTION FOR DIAGNOSTIC
PRE-INSPECTION
FOR DIAGNOSTIC
Basic InspectionINFOID:0000000004807932
The engine start function, door lock function, power distribution 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 identify 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 syst em by performing the vehicle security operation check
after basic inspection.
1.CHECK DOOR LOCK OPERATION
Check the door lock for normal operation with the In telligent 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-200, "
Symptom Table".
2.CHECK ENGINE STARTING
Check that the engine starts when operating with the Intelligent Key.
Does the engine start?
YES >> GO TO 3.
NO >> Refer to S E C - 111 , "
Symptom Table".
3.CHECK STEERING LOCK
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-67, "
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-44, "
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 the 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-6, "
Vehicle Security Operation Check".
Vehicle Security Operation CheckINFOID:0000000004807933
1.INSPECTION START
Turn ignition switch OFF”.
NOTE:
Before starting operation check, open front windows.
>> GO TO 2.
Revision: March 2010 2008 QX56

SEC-20
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Fu
nction (BCM - COMMON ITEM)INFOID:0000000004807910
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.
IMMU
IMMU : CONSULT-III Function (BCM - IMMU)INFOID:0000000004807911
DATA MONITOR
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by BCM. Refer to BCS-50, "
DTCIndex".
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from BCM.
DATA MONITOR The BCM input/output signals are displayed.
ACTIVE TEST The signals used to activate each device are forcibly supplied from BCM.
ECU IDENTIFICATION The BCM part number is displayed.
CONFIGURATION • Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.
System
Sub system selection item Diagnosis mode
WORK SUPPORT DATA MONITOR ACTIVE TEST
BCM BCM ×
Door lock DOOR LOCK ×××
Rear window defogger REAR DEFOGGER ×
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ××
Air conditioner AIR CONDITONER ×
Intelligent Key system INTELLIGENT KEY ×
Combination switch COMB SW ×
Immobilizer IMMU ××
Interior room lamp battery saver BATTERY SAVER ×××
Back door open TRUNK ××
RAP (retained accessory power) RETAINED PWR ×××
Signal buffer system SIGNAL BUFFER ××
TPMS (tire pressure monitoring sys-
tem) AIR PRESSURE MONITOR
×××
Vehicle security system PANIC ALARM ×
Revision: March 2010 2008 QX56

SEC-22
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DIAGNOSIS SYSTEM (I
NTELLIGENT KEY UNIT)
DIAGNOSIS SYSTEM (INT ELLIGENT KEY UNIT)
CONSULT-III Function (INTELLIGENT KEY)INFOID:0000000001539115
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with Intelligent Key unit.
WORK SUPPORT
SELF-DIAG RESULT
Refer to SEC-79, "DTCIndex".
DATA MONITOR
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by Intelligent Key unit.
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from Intelligent Key unit.
DATA MONITOR The Intelligent Key unit input/output signals are displayed.
ACTIVE TEST The signals used to activate each device are forcibly supplied from Intelligent Key unit.
ECU IDENTIFICATION The Intelligent Key unit part number is displayed.
Support item DescriptionSelection item Condition
CONFIRM KEY FOB ID It can check whether Intelligent Key ID code
is registered or not. ——
TAKE OUT FROM WINDOW WARN Take away warning chime (from window)
mode can be changed. ON
Active
OFF Inactive
LOW BATT OF KEY FOB WARN Intelligent Key low battery warning mode can
be changed. ON
Active
OFF Inactive
KEYLESS FUNCTION Door lock function with Intelligent Key can be
changed. ON
Active
OFF Inactive
ANSWER BACK FUNCTION Buzzer reminder operation can be changed. ON
Active
OFF Inactive
SELECTIVE UNLOCK FUNCTION Anti-hi jack mode can be changed. ON
Active
OFF Inactive
HAZARD ANSWER BACK Hazard reminder operation mode can be
changed. Refer to DLK-49
.
ANSWER BACK WITH I-KEY LOCK Buzzer reminder operation (lock operation)
mode by each door request switch can be
changed. BUZZER
Active
OFF Inactive
ANSWER BACK WITH I-KEY UNLOCK Buzzer reminder operation (unlock operation)
mode by each door request switch can be
changed. BUZZER
Active
OFF Inactive
AUTO RELOCK TIMER Auto door lock operation mode can be
changed. OFF
Inactive
1 min Active
ENGINE START BY I-KEY Engine start function (by Intelligent Key)
mode can be changed. ON
Active
OFF Inactive
LOCK/UNLOCK BY I-KEY Door lock function by door request switch can
be changed. ON
Active
OFF Inactive
Revision: March 2010 2008 QX56

DIAGNOSIS SYSTEM (INTELLIGENT KEY UNIT)SEC-23
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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ACTIVE TEST
Monitor Item Condition
PUSH SW Indicates [ON (pressed)/OFF (released)] condition of ignition knob switch.
KEY SW Indicates [ON (inserted)/OFF (removed)] cond ition of key switch.
DR REQ SW Indicates [ON (pressed)/OFF (released)] condition of door request swit ch (driver side).
AS REQ SW Indicates [ON (pressed)/OFF (re
leased)] condition of door request switch (passenger
side).
BD/TR REQ SW Indicates [ON (pressed)/OFF (released)] condition of door request switch (back door).
IGN SW Indicates [ON (ON or START position)/OFF (other than ON and START position)] con-
dition of ignition switch ON position.
ACC SW Indicates [ON/OFF] condition of ignition switch ACC position.
STOP LAMP SW Indicates [ON/OFF] condition of stop lamp switch.
DOOR LOCK SIG Indicates [ON/OFF] condition of LOCK signal from Intelligent Key.
DOOR UNLOCK SIG Indicates [ON/OFF] condition of UNLOCK signal from Intelligent Key.
DOOR SW DR Indicates [OPEN/CLOSE] condition of front door switch (driver side) from BCM via CAN
communication.
DOOR SW AS Indicates [OPEN/CLOSE] condition of front door switch (passenger side) from BCM via
CAN communication.
DOOR SW RR Indicates [OPEN/CLOSE] condition of rear door switch (RH) from BCM via CAN com-
munication.
DOOR SW RL Indicates [OPEN/CLOSE] condition of rear door switch (LH) from BCM via CAN com-
munication.
DOOR BK SW Indicates [OPEN/CLOSE] condition of back door switch from BCM via CAN communi-
cation.
VEHICLE SPEED Displays the vehicle speed signal received from combination meter by numerical value
[km/h].
Test item
Description
DOOR LOCK/UNLOCK This test is able to check door lock/unlock operation.
• ALL UNLK: All door lock actuators are unlocked.
• DR UNLK: Door lock actuator
(driver side) is unlocked.
• AS UNLK: Door lock actuator (passenger side) is unlocked.
• BK UNLK: This item is indicated, but inactive.
• LOCK: All door lock actuator is locked.
ANTENNA This test is able to check Intelligent Key antenna operation.
When the following condition are met, hazard warning lamps flash.
• ROOM ANT1: Inside key antenna (console) detects Intelligent Key, when “ROOM
ANT1” is selected.
• ROOM ANT2: Inside key antenna (instrument center/rear seat) detects Intelligent
Key, when “ROOM ANT2”is selected.
• DRIVER ANT: Outside key antenna (driver side) detects Intelligent Key, when “DRIV- ER ANT” is selected.
• ASSIST ANT: Outside key antenna (passenger side) detects Intelligent Key, when “ASSIST ANT” is selected.
• BK DOOR ANT: Outside key antenna (rear bumper) detects Intelligent Key, when “BK
DOOR ANT” is selected.
OUTSIDE BUZZER This test is able to check Intelligent Key warning buzzer operation.
•ON
•OFF
INSIDE BUZZER This test is able to check warning chime in combination meter operation.
• TAKE OUT: Take away
warning chime sounds.
• KNOB: Ignition knob switch warning chime sounds.
• KEY: Key warning chime sounds.
•OFF
Revision: March 2010 2008 QX56