INFINITI QX56 2008 Factory Service Manual

KEY CYLINDER SWITCHSEC-43
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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3. Check continuity between front door lock assembly LH (key cyl- inder switch) connector (A) D14 terminal 5 and body ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3.CHECK DOOR KEY CYLINDER SWITCH LH
Check continuity between front door lock assembly LH (key cylinder
switch) terminals.
Is the inspection result normal?
YES >> GO TO 4
NO >> Replace front door lock assembly LH (key cylinder switch). Refer to DLK-232, "
Removal and
Installation".
4.CHECK DOOR KEY CYLINDER HARNESS
Check continuity between main power window and door lock/unlock
switch connector (A) D7 terminals 4, 6 and front door lock assembly
LH (key cylinder switch) connector (B) D14 terminals 1, 6 and body
ground.
Is the inspection result normal?
YES >> Replace main power window and door lock/unlock switch.
NO >> Repair or replace harness.
Connector TerminalsContinuity
D14 5 – Ground Yes
WIIA0813E
TerminalsCondition Continuity
1 – 5 Key is turned to UNLOCK or neutral.
No
Key is turned to LOCK. Yes
5 – 6 Key is turned to LOCK or neutral.
No
Key is turned to UNLOCK. Yes
LIIA1573E
Connector Terminals Connector Terminals Continuity
A: Main
power win-
dow and
door lock/ unlock
switch 4 B: Front
door lock
assembly LH (key
cylinder switch) 1Y
es
66Y es
4, 6 Ground No
WIIA0814E
Revision: March 2010 2008 QX56

SEC-44
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
IGNITION KNOB SWITCH
IGNITION KNOB SWITCH
Ignition Knob
Switch CheckINFOID:0000000001539156
1.CHECK IGNITION KNOB SWITCH
With CONSULT-III
Display “PUSH SW” on DATA MONITOR screen, and check if ON/OFF display is linked to ignition switch oper-
ation.
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector.
3. Check voltage between Intelligent Key unit harness connector M70 terminal 27 and ground.
Is the inspection result normal?
YES >> Ignition knob switch is OK.
NO >> GO TO 2
2.CHECK IGNITION KNOB SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch harness connector M12 terminal 1 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace key switch and ignition knob switch power supply circuit.
3.CHECK IGNITION KNOB SWITCH OPERATION
Check continuity between key switch and ignition knob switch terminals 1 and 2.
Monitor item Condition
PUSH SW Ignition switch is pushed: ON
Ignition switch is released: OFF
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
M70 27 Ground Ignition switch is
pushed
Battery voltage
Ignition switch is re-
leased 0
WIIA1175E
1 - Ground
: Battery voltage
PIIB4257E
Revision: March 2010 2008 QX56

IGNITION KNOB SWITCHSEC-45
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Is the inspection result normal?
YES >> GO TO 4
NO >> Replace key switch and ignition knob switch.
4.CHECK IGNITION KN OB SWITCH CIRCUIT
1. Check continuity between Intelligent Key unit harness connector (A) M70 terminal 27 and key switch and ignition knob switch harness c onnector (B) M12 terminal 2.
2. Check continuity between Intelligent Key unit harness connector M70 terminal 27 and ground.
Is the inspection result normal?
YES >> Check the condition of harness and harness connector.
NO >> Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.
Component Terminals ConditionContinuity
Ignition
knob switch 12 Ignition switch is pushed Yes
Ignition switch is released No
PIIA9929E
27 - 2
: Continuity should exist.
27 - Ground : Continuity should not exist.
WIIA1176E
Revision: March 2010 2008 QX56

SEC-46
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
HOOD SWITCH
HOOD SWITCH
Diagnosis ProcedureINFOID:0000000001602186
1.CHECK HOOD SWITCH
Check hood switch and hood fitting condition.
Is the inspection result normal?
YES >> GO TO 2
NO >> Adjust installation of hood switch.
2.CHECK HOOD SWITCH INPUT SIGNAL
With CONSULT-III
Check "HOOD SW" in "BCM" DATA MONI TOR mode with CONSULT-III. Refer to SEC-21, "
THEFT ALM :
CONSULT-III Function (BCM - THEFT ALM)".
Without CONSULT-III
Check voltage between IPDM E/R harness connector E122 terminal
41 and ground.
Is the inspection result normal?
YES >> Hood switch is OK.
NO >> GO TO 3
3.CHECK HOOD SWITCH SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector E122 and hood switch connector.
3. Check continuity between IPDM E/R connector (A) E122 termi- nal 41 and hood switch connector (B) E8 terminal 1.
4. Check continuity between IPDM E/R connector (A) E122 termi- nal 41 and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
4.CHECK HOOD SWITCH GROUND CIRCUIT
Check continuity between hood switch connector E8 terminal 2 and ground. When hood is open : HOOD SW ON
When hood is closed : HOOD SW OFF
Connector
Te r m i n a l
Condition of
hood Voltage (V)
(Approx.)
(+) (-)
E122 41Ground Open
0
Closed Battery voltage
WIIA0601E
Te r m i n a l s Continuity
IPDM E/R
Connector Te r m i n a l
Hood switch
connector Te r m i n a l
E122 41E81Yes
IPDM E/R Connector Terminals Continuity
E122 41 Ground No
ALKIA1785ZZ
Revision: March 2010 2008 QX56

HOOD SWITCHSEC-47
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Is the inspection result normal?
YES >> GO TO 5
NO >> Repair or replace harness.
5.CHECK HOOD SWITCH
Check continuity between hood switch terminals 1 and 2.
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-34, "Removal and
Installation of IPDM E/R".
NO >> Replace hood switch.
Connector Terminals Continuity
E8 2Ground Yes
ALKIA1786ZZ
Terminals ConditionContinuity
1- 2 Pressed
No
Released Yes
ALKIA1787ZZ
Revision: March 2010 2008 QX56

SEC-48
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
HORN FUNCTION
HORN FUNCTION
Symptom TableINFOID:0000000001539157
HAZARD AND HORN REMINDER FUNCTION MALFUNCTION
NOTE:
• Before performing the diagnosis in the follo
wing table, check “Work flow”. Refer to SEC-3, "
Work Flow".
• If the following symptoms” are detected, check systems shown in the “Diagnosis/service procedure” column in this order.
Conditions of Vehicle (Operating Conditions)
• “ANSWER BACK FUNCTION” is ON when setting on CONSULT-III.
• Ignition switch is in OFF position.
• All doors are closed.
Symptom Diagnosis/service procedureReference
page
Hazard reminder does not operate by request switch.
(Horn reminder operate.) 1.
Check “HAZARD ANSWER BACK” setting in “WORK
SUPPORT”. DLK-49
2. Check hazard function.
DLK-108
3. Check Intermittent Incident. GI-38
Hazard reminder does not operate by Intelligent Key.
(Horn reminder operate.)1.
Check “HAZARD ANSWER BACK” setting in “WORK
SUPPORT”. DLK-49
2. Check hazard function.
DLK-108
3. Check Intelligent Key battery inspection.DLK-102
Horn reminder does not operate by request switch.
(Hazard reminder operate.)1.
Check “ANSWER BACK WITH I-KEY LOCK” or “AN-
SWER BACK WITH I-KEY UNLOCK” setting in “WORK
SUPPORT”. DLK-49
2. Check Intelligent Key warning buzzer.
DLK-91
3. Check Intermittent Incident. GI-38
Horn reminder does not operate by Intelligent Key.
(Hazard reminder operate.)1.
Check “HORN WITH KEYLESS LOCK” setting in
“WORK SUPPORT”. DLK-49
2. Check horn function.
SEC-48
3. Check Intermittent Incident. GI-38
Revision: March 2010 2008 QX56

VEHICLE SECURITY INDICATORSEC-49
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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VEHICLE SECURITY INDICATOR
DescriptionINFOID:0000000001539158
• Vehicle security indicator is built in combination meter.
• NATS (Nissan Anti-Theft System) and vehicle security system conditions are indicated by blink or illumina-
tion of vehicle security indicator.
Component Function CheckINFOID:0000000001539159
1.CHECK FUNCTION
1. Perform “THEFT IND” in the “Active Test” mode with CONSULT-III.
2. Check vehicle security indicator operation.
Is the inspection result normal?
YES >> Inspection End.
NO >> Refer to SEC-49, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001539160
1.SECURITY INDICATOR LAMP ACTIVE TEST
With CONSULT-III
Check "THEFT IND” in "ACTI VE TEST" mode with CONSULT-III.
Without CONSULT-III
1. Disconnect BCM.
2. Check voltage between BCM harness connector M18 terminal 23 and ground.
Is the inspection result normal?
YES >> Security indicator lamp is OK.
NO >> GO TO 2
2.SECURITY INDICATOR LAMP CHECK
Check security indicator lamp condition by performing the self-diagnosis test. Refer to MWI-24, "
Diagnosis
Description".
Is the inspection result normal?
YES >> GO TO 3
NO >> Replace combination meter. Refer to MWI-76, "
Removal and Installation".
3.CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and combination meter connector.
Te s t i t e m D e s c r i p t i o n
THEFT IND ON
Vehicle security indicator ON
OFF OFF
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M18 23Ground ON
0
OFF Battery voltage
LIIA0523E
Revision: March 2010 2008 QX56

SEC-50
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
VEHICLE SECURITY INDICATOR
3. Check continuity between BCM connector (A) M18 terminal 23
and combination meter harness connector (B) M24 terminal 35.
4. Check continuity between BCM connector (A) M18 terminal 23 and ground.
Is the inspection result normal?
YES >> Replace the BCM. Refer to BCS-55, "Removal and
Installation".
NO >> Repair or replace harness. 23 - 35
: Continuity should exist.
23 - Ground : Continuity should not exist.
ALKIA1290ZZ
Revision: March 2010 2008 QX56

BCM (BODY CONTROL MODULE)SEC-51
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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ECU DIAGNOSIS
BCM (BODY CONTROL MODULE)
Reference ValueINFOID:0000000004807916
VALUES ON THE DIAGNOSIS TOOL
Monitor Item Condition Value/Status
AIR COND SW A/C switch OFF
OFF
A/C switch ON ON
AUT LIGHT SYS Outside of the room is dark
OFF
Outside of the room is bright ON
AUTO LIGHT SW Lighting switch OFF
OFF
Lighting switch AUTO ON
BACK DOOR SW Back door closed
OFF
Back door opened ON
CDL LOCK SW Door lock/unlock switch does not operate
OFF
Press door lock/unlock switch to the LOCK side ON
CDL UNLOCK SW Door lock/unlock switch does not operate
OFF
Press door lock/unlock switch to the UNLOCK side ON
DOOR SW-AS Front door RH closed
OFF
Front door RH opened ON
DOOR SW-DR Front door LH closed
OFF
Front door LH opened ON
DOOR SW-RL Rear door LH closed
OFF
Rear door LH opened ON
DOOR SW-RR Rear door RH closed
OFF
Rear door RH opened ON
ENGINE RUN Engine stopped
OFF
Engine running ON
FR FOG SW Front fog lamp switch OFF
OFF
Front fog lamp switch ON ON
FR WASHER SW Front washer switch OFF
OFF
Front washer switch ON ON
FR WIPER LOW Front wiper switch OFF
OFF
Front wiper switch LO ON
FR WIPER HI Front wiper switch OFF
OFF
Front wiper switch HI ON
FR WIPER INT Front wiper switch OFF
OFF
Front wiper switch INT ON
FR WIPER STOP Any position other than front wiper stop position
OFF
Front wiper stop position ON
HAZARD SW When hazard switch is not pressed
OFF
When hazard switch is pressed ON
LIGHT SW 1ST Lighting switch OFF
OFF
Lighting switch 1st ON
Revision: March 2010 2008 QX56

SEC-52
< ECU DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BCM (BODY CONTROL MODULE)
HEADLAMP SW1Headlamp switch OFF OFF
Headlamp switch 1st
ON
HEADLAMP SW2 Headlamp switch OFF
OFF
Headlamp switch 1st ON
HI BEAM SW High beam switch OFF
OFF
High beam switch HI ON
IGN ON SW Ignition switch OFF or ACC
OFF
Ignition switch ON ON
IGN SW CAN Ignition switch OFF or ACC
OFF
Ignition switch ON ON
INT VOLUME Wiper intermittent dial is in a dial position 1 - 7 1 - 7
I-KEY LOCK LOCK button of Intelligent Key is not pressed
OFF
LOCK button of Intelligent Key is pressed ON
I-KEY UNLOCK UNLOCK button of Intelligent Key is not pressed
OFF
UNLOCK button of Intelligent Key is pressed ON
KEY ON SW Mechanical key is removed from key cylinder
OFF
Mechanical key is inserted to key cylinder ON
OIL PRESS SW • Ignition switch OFF or ACC
• Engine running
OFF
Ignition switch ON ON
PASSING SW Other than lighting switch PASS
OFF
Lighting switch PASS ON
REAR DEF SW Rear window defogger switch OFF
OFF
Rear window defogger switch ON ON
RR WASHER SW Rear washer switch OFF
OFF
Rear washer switch ON ON
RR WIPER INT Rear wiper switch OFF
OFF
Rear wiper switch INT ON
RR WIPER ON Rear wiper switch OFF
OFF
Rear wiper switch ON ON
RR WIPER STOP Rear wiper stop position
OFF
Other than rear wiper stop position ON
TAIL LAMP SW Lighting switch OFF
OFF
Lighting switch 1ST ON
TRNK OPNR SW When back door opener switch is not pressed
OFF
When back door opener switch is pressed ON
TURN SIGNAL L Turn signal switch OFF
OFF
Turn signal switch LH ON
TURN SIGNAL R Turn signal switch OFF
OFF
Turn signal switch RH ON
VEHICLE SPEED While driving Equivalent to speedometer reading
Monitor Item
Condition Value/Status
Revision: March 2010 2008 QX56