INFINITI QX56 2008 Factory Service Manual

SUNROOF SYSTEMRF-7
< FUNCTION DIAGNOSIS >
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Component Parts LocationINFOID:0000000001731924
Component DescriptionINFOID:0000000001731925
ALKIA0867ZZ
1. Sunroof switch R104 2. Sunroof motor assembly R4 3. BCM M18, M19, M20
(View with instrument panel re-
moved)
4. Front door switch LH B8, RH B108
Component Function
BCM Supplies power to the sunroof motor assembly.
Sunroof switch Transmits tilt up/down & slide open/close operation signal to sunroof motor assembly.
Sunroof motor assembly The sunroof motor and integrated CPU enables tilt up/down & slide open/close as requested by
the sunroof switch.
Front door switch Detects door open/close condition and transmits to BCM.
Revision: March 2010 2008 QX56

RF-8
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)INFOID:0000000004874868
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.
RETAINED PWR
RETAINED PWR : CONSULT-III Function (BCM - RETAINED PWR)INFOID:0000000004874872
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 RF-28, "
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

DIAGNOSIS SYSTEM (BCM)RF-9
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Monitor Item [Unit] Description
DOOR SW-DR [ON/OFF] Indicates condition of front door switch LH.
DOOR SW-AS [ON/OFF] Indicates condition of front door switch RH.
Revision: March 2010 2008 QX56

RF-10
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
COMPONENT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
SUNROOF MOTOR ASSEMBLY
SUNROOF MOTOR ASSEMBLY : Diagnosis ProcedureINFOID:0000000001731928
SUNROOF MOTOR ASSEMBLY
1. CHECK SUNROOF MOTOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect sunroof motor assembly connector R4.
3. Turn ignition switch ON.
4. Check voltage between sunroof motor assembly connector R4 terminals 1 and 5 and ground.
Is the voltage as specified?
YES >> GO TO 4
NO >> GO TO 2
2. CHECK SUNROOF MOTOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect BCM connector M20.
3. Check continuity between BCM connector M20 (A) and sunroof motor assembly connector R4 (B).
4. Check continuity between BCM connector M20 (A) and ground.
Are the continuity test results as specified?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK BCM OUTPUT SIGNAL
(+) (–)Voltage
Connector Terminal
R4 1
Ground Battery voltage
5
ALKIA0868ZZ
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Continuity
Connector Terminal Connector Terminal
M20 68
R4 1
Ye s
69 5
A —Contin u it y
Connector Terminal
M20 68
Ground No
69
ALKIA0870ZZ
Revision: March 2010 2008 QX56

POWER SUPPLY AND GROUND CIRCUITRF-11
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1. Connect BCM connector M20.
2. Turn ignition switch ON.
3. Check voltage between BCM connector M20 and ground.
Is the voltage reading as specified?
YES >> Check condition of harness and connector.
NO >> Replace BCM. Refer to BCS-55, "
Removal and Installation".
4. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between sunroof motor assembly connector R4 terminal 7 and ground.
Is the continuity test result as specified?
YES >> Power supply and ground circuits are OK.
NO >> Repair or replace harness.
SUNROOF MOTOR ASSEMBLY : Special Repair RequirementINFOID:0000000001731929
1. PERFORM INITIALIZATION PROCEDURE
Perform initialization procedure.
Refer to RF-5, "
ADDITIONAL SERVICE WHEN REPLACING CO NTROL UNIT : Special Repair Requirement".
Does the sunroof motor assembly operate properly?
YES >> Repair is complete.
NO >> Check fitting adjustment.
(+) (–) Voltage
Connector Terminal
M20 68
Ground Battery voltage
69
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Connector Terminal—Continuity
R4 7Ground Yes
ALKIA0869ZZ
Revision: March 2010 2008 QX56

RF-12
< COMPONENT DIAGNOSIS >
SUNROOF SWITCH CIRCUIT
SUNROOF SWITCH CIRCUIT
DescriptionINFOID:0000000001731930
The BCM supplies power to the integrated CPU of the sunroof motor assembly. The tilt and slide functions of
the sunroof motor assembly is controlled by the sunroof switch.
Component Function CheckINFOID:0000000001731931
1. CHECK SUNROOF MOTOR FUNCTION
Do tilt up/down & slide open/close functi ons operate normally with sunroof switch?
Is the inspection result normal?
YES >> Sunroof motor assembly is OK.
NO >> Refer to RF-10, "
SUNROOF MOTOR ASSEMBLY : DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000001731932
1. CHECK SUNROOF SWITCH INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between sunroof switch connector and ground.
Are the voltage measurements as specified?
YES >> Sunroof switch is operating normally.
NO >> GO TO 2
2. CHECK SUNROOF SWITCH CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect sunroof motor assembly connector R4 and sunroof switch connector R104.
3. Check continuity between sunroof switch connector R104 (A) and sunroof motor assembly connector R4 (B).
4. Check continuity between sunroof switch connector R104 (A) and ground.
Connector Te r m i n a l s
Sunroof switch position Voltage (V)
(Approx.)
(+) (–)
R104 1
2SLIDE CLOSE
0V
Other than above Battery voltage
3 SLIDE OPEN
0V
Other than above Battery voltage
4 TILT UP
0V
Other than above Battery voltage
6 TILT DOWN
0V
Other than above Battery voltage
ALKIA1041GB
AB
Continuity
Connector Terminal Connector Terminal
R104 1
R4 3
Ye s
28
39
44
61
0
ALKIA0873ZZ
Revision: March 2010 2008 QX56

SUNROOF SWITCH CIRCUITRF-13
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Are the continuity test results as specified?
YES >> GO TO 3
NO >> Repair harness or connector.
3. CHECK SUNROOF SWITCH
1. Check continuity between sunroof switch terminals.
Are the continuity test results as specified?
YES >> Sunroof switch is operating normally.
NO >> Replace sunroof switch (map lamp assembly).
A —Continuity
Connector Terminal
R104 1
Ground No
2
3
4
6
Terminals
Sunroof switch position Continuity
1
2SLIDE CLOSE
Yes
Other than above No
3 SLIDE OPEN
Yes
Other than above No
4 TILT UP
Yes
Other than above No
6 TILT DOWN
Yes
Other than above No
ALKIA0874ZZ
Revision: March 2010 2008 QX56

RF-14
< COMPONENT DIAGNOSIS >
DOOR SWITCH
DOOR SWITCH
DescriptionINFOID:0000000006081160
Detects door open/close condition and transmits the signal to BCM.
Component Function CheckINFOID:0000000006081161
1. CHECK FRONT DOOR SWITCH INPUT SIGNAL
Check (“DOOR SW-DR” and “DOOR SW-AS”) in “DATA MONITOR” mode with CONSULT-III. Refer to PWC-
10, "RETAINED PWR : CONSULT-III Function (BCM - RETAINED PWR)".
Is the inspection result normal?
YES >> Front door switch circuit is OK.
NO >> Refer to RF-14, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006081162
1. CHECK FRONT DOOR SWITCH
Check voltage between BCM connector and ground.
Is the measurement value within the specification?
YES >> Replace BCM. Refer to BCS-55, "Removal and Installation".
NO >> GO TO 2
2. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and front door switch.
3. Check continuity between BCM connector and front door switch connector.
4. Check continuity between front door switch connector and ground.
Monitor item Condition
DOOR SW-DR OPEN
: ON
CLOSE : OFF
DOOR SW-AS OPEN
: ON
CLOSE : OFF
Te r m i n a l s
Door conditionVoltage (V)
(Approx.)
(+)
(–)
BCM
connector Te r m i n a l
M18 12 GroundFront door
RH OPEN
0
CLOSE Battery voltage
M19 47 Front door
LH OPEN
0
CLOSE Battery voltage
LIIA0946E
BCM connector Terminal Front door switch
connector Terminal Continuity
M18 12RH: B108
2Yes
M19 47LH: B8
LIIA0947E
Revision: March 2010 2008 QX56

DOOR SWITCHRF-15
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Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK BCM OUTPUT SIGNAL
1. Connect BCM connector.
2. Check voltage between BCM connector and ground.
Is the measurement value within the specification?
YES >> GO TO 4
NO >> Replace BCM. Refer to BCS-55, "
Removal and Installation".
4. CHECK FRONT DOOR SWITCH
Check front door switch.
Refer to RF-15, "
Component Inspection".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-38, "Intermittent Incident".
NO >> Replace front door switch.
Component InspectionINFOID:0000000006081163
1. CHECK FRONT DOOR SWITCH
Check front door switches.
Is the inspection result normal?
YES >> Front door switch is OK.
NO >> Replace front door switch.
Front door switch connector Te r m i n a l
GroundContinuity
B8 (LH) 2N o
B108 (RH)
Te r m i n a l
Voltage (V)
(Approx.)
(+)
(–)
BCM connector Terminal
M18 12
Ground Battery voltage
M19 47
LIIA0946E
Te r m i n a l
Door switch Continuity
Door switches
2 Ground part of
door switch Pressed
No
Released Yes
LIIA2377E
Revision: March 2010 2008 QX56

RF-16
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
ECU DIAGNOSIS
BCM (BODY CONTROL MODULE)
Reference ValueINFOID:0000000004874885
VALUES ON THE DIAGNOSIS TOOL
Monitor ItemCondition 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