2011 INFINITI QX56 ignition

PWO
PRECAUTIONSPWO-3
< PRECAUTION > [POWER SOCKET]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental
Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006222454
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision that would result in air ba g inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
 When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
 When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service.
Revision: 2010 May2011 QX56

PWO
PRECAUTIONSPWO-13
< PRECAUTION > [AC 120 V OUTLET]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental
Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006257062
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
 To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision that would result in air ba g inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
 When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
 When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service.
Revision: 2010 May2011 QX56

PWO
SYSTEMPWO-15
< SYSTEM DESCRIPTION > [AC 120 V OUTLET]
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SYSTEM
System DescriptionINFOID:0000000006257071
SYSTEM DIAGRAM
SYSTEM DESCRIPTION
 When turning ON the AC 120 V outlet main switch with the ignition switch ON, the indicator turns ON and the
inverter unit is activated.
 The inverter unit converts power supply voltage to AC 120 V and outputs the converted voltage to the AC
120 V outlet two seconds after the AC 120 V outlet main switch is turned ON.
Fail-safeINFOID:0000000006257269
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.
JSMIA0295GB
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

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

PWO
POWER SUPPLY AND GROUND CIRCUITPWO-23
< DTC/CIRCUIT DIAGNOSIS > [AC 120 V OUTLET]
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DTC/CIRCUIT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis ProcedureINFOID:0000000006257089
1.CHECK FUSE
Check that the following fuse is not blown.
Is the fuse fusing?
YES >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
NO >> GO TO 2.
2.CHECK INVERTER UNIT POWER SUPPLY CIRCUIT
Check voltage between inverter unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace the inverter unit power supply circuit.
3.CHECK INVERTER UNIT GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the inverter unit connector.
3. Check for continuity between inverter unit harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair or replace the inverter unit ground circuit.
Signal name Fuse No.
Battery power supply 79
Te r m i n a l Condition
Vo l ta g e
(Approx.)
(+) (–)
Inverter unit GroundIgnition switch
Connector Terminal
M143 4 OFF Battery voltage
Inverter unit GroundContinuity
Connector Terminal
M143 8 Existed
Revision: 2010 May2011 QX56

PWO-24
< DTC/CIRCUIT DIAGNOSIS >[AC 120 V OUTLET]
AC 120 V OUTLET MAIN SWITCH POWER SUPPLY CIRCUIT
AC 120 V OUTLET MAIN SWITCH
POWER SUPPLY CIRCUIT
Diagnosis ProcedureINFOID:0000000006257095
1.CHECK FUSE
Check that the following fuse is not blown.
Is the fuse fusing?
YES >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
NO >> GO TO 2.
2.CHECK POWER SUPPLY FOR AC 120 V OUTLET MAIN SWITCH
1. Turn ignition switch ON.
2. Check for voltage between the AC 120 V main switch harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair the AC 120 V main switch power supply circuit.
Signal name Fuse No.
Ignition power supply 3
Te r m i n a l s Condition
Vo l ta g e
(Approx.)
(+) (–)
AC 120 V outlet main switch
GroundIgnition switch
Connector Terminal
M144 1 OFF 0 V
ON 12 V
Revision: 2010 May2011 QX56

PWO
AC 120 V OUTLET MAIN SWITCH INPUT SIGNAL CIRCUITPWO-25
< DTC/CIRCUIT DIAGNOSIS > [AC 120 V OUTLET]
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AC 120 V OUTLET MAIN SWITCH
INPUT SIGNAL CIRCUIT
Diagnosis ProcedureINFOID:0000000006257093
1.CHECK HARNESS BETWEEN INVERTER UNIT AND AC 120 V OUTLET MAIN SWITCH
1. Turn ignition switch OFF.
2. Disconnect inverter unit connector and AC 120 V outlet main switch connector.
3. Check for continuity between the inverter unit harness connector and AC 120 V outlet main switch har- ness connector.
4. Check for continuity between inverter unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the harnesses or connectors.
2.CHECK AC 120 V OUTLET MAIN SWITCH INPUT SIGNAL
1. Connect inverter unit connector and AC 120 V outlet main switch connector.
2. Turn ignition switch ON.
3. AC 120 V outlet main switch ON.
4. Check for voltage between the inverter unit harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 3.
3.CHECK AC 120 V OUTLET MAIN SWITCH
1. Turn ignition switch OFF.
2. Remove AC 120 V outlet main switch.
3. Check AC 120 V outlet main switch. Refer to PWO-25, "
Component Inspection".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace AC 120 V outlet main switch.
Component InspectionINFOID:0000000006257096
1.CHECK AC 120 V OUTLET MAIN SWITCH
Check continuity of AC 120 V outlet main switch.
Inverter unit AC 120 V outlet main switch Continuity
Connector Terminal Connector Terminal
M1436M1443Existed
Inverter unit GroundContinuity
Connector Terminal
M143 6 Not existed
Te r m i n a l s Condition
Vol tag e
(Approx.)
(+) (–)
Inverter unit
GroundAC 120 V out-
let main switch
Connector Terminal
M143 6 OFF 0 V
ON 12 V
Revision: 2010 May2011 QX56