ECU INFINITI QX56 2011 Factory Service Manual

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ELECTRICAL & POWER CONTROL
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CONTENTS
POWER OUTLET
POWER SOCKET
PRECAUTION ................ ...............................
3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
SYSTEM DESCRIPTION ..............................4
COMPONENT PARTS ................................... .....4
Component Parts Location .................................. ......4
WIRING DIAGRAM .......................................5
POWER SOCKET .......................................... .....5
Wiring Diagram ................................................... ......5
REMOVAL AND INSTALLATION ...............10
POWER SOCKET .......................................... ....10
FRONT POWER SOCKET .................................... ....10
FRONT POWER SOCKET : Exploded View ...........10
FRONT POWER SOCKET : Removal and Instal-
lation ........................................................................
10
CONSOLE POWER SOCKET (CUP HOLDER) .... ....10
CONSOLE POWER SOCKET (CUP HOLDER) :
Exploded View ........................................................
10
CONSOLE POWER SOCKET (CUP HOLDER) :
Removal and Installation .........................................
10
CONSOLE POWER SOCKET (REAR) ................. ....11
CONSOLE POWER SOCKET (REAR) : Exploded
View ........................................................................
11
CONSOLE POWER SOCKET (REAR) : Removal
and Installation ........................................................
11
LUGGAGE ROOM POWER SOCKET .................. ....11
LUGGAGE ROOM POWER SOCKET : Exploded
View ........................................................................
12
LUGGAGE ROOM POWER SOCKET : Removal
and Installation .................................................... ....
12
AC 120 V OUTLET
PRECAUTION ............... ...............................
13
PRECAUTIONS .................................................13
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
13
SYSTEM DESCRIPTION .............................14
COMPONENT PARTS ......................................14
Component Parts Location .................................. ....14
Component Description ...........................................14
Inverter Unit .............................................................14
AC120 V Outlet Main Switch ...................................14
AC120 V Outlet ........................................................14
SYSTEM ............................................................15
System Description .............................................. ....15
Fail-safe ...................................................................15
ECU DIAGNOSIS INFORMATION ..............16
INVERTER UNIT ...............................................16
Reference Value .................................................. ....16
Fail-safe ...................................................................17
WIRING DIAGRAM ......................................18
AC 120 V POWER OUTLET .............................18
Wiring Diagram .................................................... ....18
BASIC INSPECTION ...................................21
DIAGNOSIS AND REPAIR WORK FLOW .......21
Work Flow ............................................................ ....21
DTC/CIRCUIT DIAGNOSIS .........................23
POWER SUPPLY AND GROUND CIRCUIT ....23
Revision: 2010 May2011 QX56

PWO-16
< ECU DIAGNOSIS INFORMATION >[AC 120 V OUTLET]
INVERTER UNIT
ECU DIAGNOSIS INFORMATION
INVERTER UNIT
Reference ValueINFOID:0000000006257074
TERMINAL LAYOUT
PHYSICAL VALUES
JSMIA0395ZZ
Te r m i n a l N o .
(Wire color) Description
Condition Va l u e
(Approx.)
+ − Signal name Input/
Output
1
(R) 5
(G) AC 120 V output Output Ignition
switch
ON When AC 120 V outlet
main switch OFF
0 V
When AC 120 V outlet
main switch ON
(When using circuit tester) AC 120 V
When AC 120 V outlet
main switch ON
(When using oscilloscope) Reference value
AC 120 V
4
(G/R) Ground Battery power supply Input Ignition switch OFF Battery power supply
5
(G) 1
(R) AC 120 V output Output Ignition
switch ON When AC 120 V outlet
main switch OFF
0 V
When AC 120 V outlet
main switch ON
(When using circuit tester) AC 120 V
When AC 120 V outlet
main switch ON
(When using oscilloscope) Reference value
AC 120 V
JSMIA0397GB
JSMIA0397GB
Revision: 2010 May2011 QX56

PWO
INVERTER UNITPWO-17
< ECU DIAGNOSIS INFORMATION > [AC 120 V OUTLET]
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CAUTION:
 To measure AC 120 V output signal, always use th
e circuit tester or oscilloscope AC range.
Never allow the probes to contact each other.
 Because of modified sine wave output of the AC 120 V output signal, voltage cannot be measured
accurately without using a circuit tester that can measure true RMS (root mean square).
Fail-safeINFOID:0000000006257075
When a malfunction listed below occurs, the inverter unit turns OFF the AC 120 V outlet main switch indicator
and stops the output by operating the fail-safe.
6
(W)
Ground AC 120 V outlet main
switch
InputIgnition
switch ON When AC 120 V outlet
main switch OFF
0 V
When AC 120 V outlet
main switch ON 12 V
7
(O) AC 120 V outlet main
switch indicator
OutputIgnition
switch ON When AC 120 V outlet
main switch OFF
0 V
When AC 120 V outlet
main switch ON 5.2 V
8
(G/Y) Ground — Ignition switch ON 0 V
Te r m i n a l N o .
(Wire color) Description
Condition Va l u e
(Approx.)
+ − Signal name Input/
Output
Malfunction item Fail-safe condition Fail-safe cancellation condition
Inverter unit is overheat-
ed When the inverter unit is overheated, the output
stops to protect the inverter unit. After the inverter unit temperature is lowered, the
AC 120 V outlet main switch ON
⇒ OFF ⇒ ON op-
eration allows normal return.
Inverter unit power sup-
ply voltage is 11.5 V or
less When inverter unit input voltage is lowered, the out-
put stops to protect the battery from running out.
Automatic normal return wh
en inverter unit power
supply voltage reaches 11.5 V - 16 V.
Inverter unit power sup-
ply voltage is 16 V - 18 V When inverter unit input voltage reaches 16 V - 18 V,
the output stops to protect the inverter unit. Automatic normal return wh
en inverter unit power
supply voltage reaches 11.5 V - 16 V.
Inverter unit power sup-
ply voltage is 18 V or
more When inverter unit input voltage reaches 18 V or
more, the output stops to protect the inverter unit. After the inverter unit power supply voltage reaches
11.5 V - 16 V, the AC 120 V outlet main switch ON
⇒
OFF ⇒ ON operation allows normal return.
Inverter unit output cur-
rent is 2.8 A or more When inverter unit output current reaches 2.8 A or
more, the output stops to prevent over current. (e.g.
connecting an electric appliance exceeding rated
output) Automatic normal return wh
en inverter output cur-
rent reaches 2.8 A.
Inverter unit output signal
(AC 120 V output signal)
is shorted When inverter unit output signal is shorted, the out-
put stops. After recovering from inverter unit output signal
short, the AC 120 V outlet main switch ON
⇒ OFF
⇒ ON operation allows normal return.
Revision: 2010 May2011 QX56

RAX-14
< REMOVAL AND INSTALLATION >
REAR DRIVE SHAFT
9. Install the boot securely into grooves (indicated by “*” marks)shown in the figure.
CAUTION:
If grease adheres to the boot mounting surface (indicated
by “*” mark) on the shaft or housing, boot may come off.
Remove all grease from the surfaces.
10. To prevent the deformation of the boot, adjust the boot installa- tion length (L) to the specified value shown below by inserting
the suitable tool into inside of the boot from the large diameter
side of boot and discharging the inside air.
CAUTION:
 If the boot installation length is outsid e the standard, it may cause breakage of boot.
 Be careful not to touch the inside of the boot with the tip of tool.
11. Install new boot bands securely. CAUTION:
Never reuse boot band.
a. Small boot band
i. Secure the ends of the boot with boot bands using the boot band crimping tool [SST: KV40107300 ( −)] (A).
CAUTION:
Secure boot band so that dimension (M) meets the specifi-
cation as shown in the figure.
b. Large boot band
i. Put boot band in the groove on drive shaft boot. Then fit pawls ( ) into holes to temporary installation.
NOTE:
For the large diameter side, fit projection (A) and guide slit (B) at
first.L: Refer to
RAX-18, "
Drive Shaft".
JPDIG0136ZZ
PDIA1187J
M : 1.0 – 4.0 mm (0.039 – 0.157 in)
DSF0047D
SDIA3557E
Revision: 2010 May2011 QX56

REAR DRIVE SHAFTRAX-15
< REMOVAL AND INSTALLATION >
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ii. Pinch projection on the band with suitable pliers to tighten band.
iii. Insert tip of band below end of the pawl.
12. Secure joint sub-assembly and shaft, and then check that they are in the correct position when rotating boot. Install them with
boot band when boot installation positions become incorrect.
CAUTION:
Never reuse boot band.
13. Install dust shield to drive shaft. CAUTION:
Never reuse dust shield.
FINAL DRIVE SIDE
FINAL DRIVE SIDE : Dis assembly and AssemblyINFOID:0000000006225471
DISASSEMBLY
1. Fix shaft with a vise.
CAUTION:
Protect shaft when fixing with a vi se using aluminum or copper plates.
2. Remove boot bands, and then remove boot from housing.
3. Put matching marks on housing and shaft. CAUTION:
Use paint or similar substance for matc hing marks. Never scratch the surface.
4. Remove stopper ring with suitable tool, and pull out housing.
5. Put matching marks on ball cage/steel ball/inner race assembly and shaft.
CAUTION:
Use paint or similar substance for matching marks. Never
scratch the surface.
6. Remove snap ring, then remove ball cage/steel ball/inner race assembly from shaft.
7. Remove boot from shaft.
ASSEMBLY
1. Remove old grease on housing with paper waste.
SDIA3558E
SRA249A
SFA514A
Revision: 2010 May2011 QX56

RAX-16
< REMOVAL AND INSTALLATION >
REAR DRIVE SHAFT
2. Install boot and boot bands to shaft.CAUTION:
 Wrap serration on shaft with tape (A) to protect the bootfrom damage.
 Never reuse boot and boot band.
3. Remove the tape wrapped around the serration on shaft.
4. Install ball cage/steel ball/inner race assembly (1), align it with the matching marks on shaft (2) put during the removal.
5. Secure ball cage/steel ball/inner race assembly onto shaft with snap ring (3).
CAUTION:
Never reuse snap ring.
6. Apply the appropriate amount of grease onto housing and slid- ing surface.
7. Install stopper ring to housing. CAUTION:
Never reuse stopper ring.
8. After installed, pull shaft to check engagement between housing and stopper ring.
9. Install boot securely into grooves (indicated by “*” marks) shown in the figure.
CAUTION:
If grease adheres to the boot mounting surfaces (indicated
by “*” marks) on shaft or housing, boot may be removed.
Remove all grease from the surfaces.
10. To prevent deformation of the boot, adjust the boot installation
length (L) to the value shown below by inserting the suitable tool
into the inside of boot from the large diameter side of boot and
discharging inside air.
CAUTION:
 If the boot installation length is outsid e the standard, it may cause breakage of boot.
 Be careful not to touch the inside of the boot with the tip of tool.
11. Install boot bands securely as shown in the figure. CAUTION:
Never reuse boot band.
12. Secure housing and shaft, and then check that they are in the correct position when rotating boot. Install them with boot band
when the mounting positi ons become incorrect.
CAUTION:
Never reuse boot band.
InspectionINFOID:0000000006225472
INSPECTION AFTER REMOVAL
JPDIF0009ZZ
Grease amount : Refer to RAX-18, "Drive Shaft".
L: Refer to RAX-18, "
Drive Shaft".
JPDIG0004ZZ
JPDIG0137ZZ
PDIA1188J
Revision: 2010 May2011 QX56

RF-1
BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY
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SECTION RF
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CONTENTS
ROOF
PRECAUTION ................ ...............................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Commercial Service Tool .................................... ......4
SYSTEM DESCRIPTION ..............................5
COMPONENT PARTS ................................... .....5
Component Parts Location ................................ ......5
Component Description ............................................5
SYSTEM ..............................................................6
System Diagram ................................................. ......6
System Description ...................................................6
ECU DIAGNOSIS INFORMATION ...............7
BCM (BODY CONTROL MODULE) ............... .....7
List of ECU Reference ........................................ ......7
SUNROOF SYSTEM ...................................... .....8
Reference Value ................................................. ......8
WIRING DIAGRAM .......................................9
SUNROOF MOTOR ASSEMBLY ................... .....9
Wiring Diagram ................................................... ......9
BASIC INSPECTION ...................................16
DIAGNOSIS AND REPAIR WORKFLOW ..... ....16
WorkFlow ............................................................ ....16
INSPECTION AND ADJUSTMENT ....................17
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT .................................................... ....
17
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Description .................................
17
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement ......
17
DTC/CIRCUIT DIAGNOSIS .........................18
POWER SUPPLY AND GROUND CIRCUIT ....18
Diagnosis Procedure .......................................... ....18
VEHICLE SPEED SIGNAL CIRCUIT ................20
Component Function Check ..................................20
Diagnosis Procedure ..............................................20
SUNROOF SWITCH ..........................................21
Component Function Check ..................................21
Diagnosis Procedure ..............................................21
Component Inspection .............................................22
SYMPTOM DIAGNOSIS ..............................23
SUNROOF DOES NOT OPERATE PROPER-
LY ......................................................................
23
Description ........................................................... ....23
Diagnosis Procedure ...............................................23
SUNROOF DOES NOT OPERATE ANTI-
PINCH FUNCTION ............................................
24
Diagnosis Procedure ........................................... ....24
RETAINED POWER OPERATION DOES NOT
OPERATE PROPERLY .....................................
25
Diagnosis Procedure ...............................................25
SQUEAK AND RATTLE TROUBLE DIAG-
NOSES ..............................................................
26
Work Flow ................................................................26
Inspection Procedure ...............................................28
Diagnostic Worksheet ..............................................30
REMOVAL AND INSTALLATION ...............32
GLASS LID ........................................................32
Revision: 2010 May2011 QX56

BCM (BODY CONTROL MODULE)RF-7
< ECU DIAGNOSIS INFORMATION >
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ECU DIAGNOSIS INFORMATION
BCM (BODY CONTROL MODULE)
List of ECU ReferenceINFOID:0000000006141226
ECU Reference
BCM BCS-33, "
Reference Value"
BCS-54, "Fail-safe"
BCS-57, "DTCIndex"
Revision: 2010 May2011 QX56

RF-8
< ECU DIAGNOSIS INFORMATION >
SUNROOF SYSTEM
SUNROOF SYSTEM
Reference ValueINFOID:0000000006141227
TERMINAL LAYOUT
PHYSICAL VALUES
JMKIA2225ZZ
Te r m i n a l N o .(Wire color) Description
ConditionVoltage (V)
(Approx.)
+ – Signal name Input/
Output
1
(B) Ground Ground — — 0
3
(Y) Ground Retained power signal Input Ignition switch ON
12
Within 45 seconds after ignition
switch is turned to OFF
When driver side or passenger side
door is opened during retained pow-
er operation 0
5
(P) Ground Sunroof open signal Input Sunroof switch in following position
TILT DOWN
 SLIDE OPEN
0
Ignition switch ON 12
6
(W) Ground Sunroof power supply Input — 12
8
(SB) Ground Vehicle speed signal (2-
pulse)
InputSpeedometer operated [When vehi-
cle speed is approx.40km/ h
(25MPH)]
10
(GR) Ground Sunroof close signal Input Sunroof switch in following position
TILT UP
 SLIDE CLOSE
0
Ignition switch ON 12
ELF1080D
Revision: 2010 May2011 QX56

SUNROOF SWITCHRF-21
< DTC/CIRCUIT DIAGNOSIS >
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SUNROOF SWITCH
Component Function CheckINFOID:0000000006141235
1.CHECK SUNROOF MOTOR FUNCTION
Check tilt up/down & slide open/close operations with sunroof switch.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Refer to RF-21, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000006141236
1.PERFORM INITIALIZATION PROCEDURE
1. Initialization procedure is executed and operation is confirmed. Refer to RF-17, "
ADDITIONAL SERVICE
WHEN REPLACING CONTROL UNIT : Special Repair Requirement".
2. Check tilt up/down & slide open/close operations with sunroof switch.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK SUNROOF SWITCH GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect sunroof switch harness connector.
3. Check continuity between sunroof switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness or connector.
3.CHECK SUNROOF SWITCH INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between sunroof switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK SUNROOF SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect sunroof motor assembly harness connector.
3. Check continuity between sunroof motor assemb ly harness connector and sunroof switch harness con-
nector.
Sunroof switch
GroundContinuity
Connector Terminal
R16 2 Existed
(+) (− ) Voltage (V)
(Approx.)
sunroof switch
Connector Terminal
R16 1
Ground 12
3
Revision: 2010 May2011 QX56