Ignition switch removal INFINITI QX56 2008 Factory Service Manual

INTERIOR ROOM LAMP POWER SUPPLY CIRCUIT
INL-15
< COMPONENT DIAGNOSIS >
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INTERIOR ROOM LAMP POWER SUPPLY CIRCUIT
DescriptionINFOID:0000000001601387
Provides the battery saver output/power supply. Also cu ts the power supply when the interior room lamp bat-
tery saver is activating.
Component Function CheckINFOID:0000000001601388
1.CHECK BATTERY SAVER OUTPUT /POWER SUPPLY FUNCTION
CONSULT-III
1. Turn ignition switch ON.
2. Turn each interior room lamp ON.
- Front room/map lamp assembly
- Vanity lamps
- Personal lamp 2nd row
- Personal lamp 3rd row
- Cargo lamp
3. Open the driver door to turn ON the step lamps, foot lamps and puddle lamps.
- Front step lamps
- Rear step lamps
- Foot lamps
- Puddle lamps
- Ignition keyhole Illumination
4. Select “BATTERY SAVER” of BCM (BATTERY SAVER) active test item.
5. While operating the test item, check that each interior room lamp turns ON/OFF.
Is the inspection result normal?
YES >> Battery saver output/power supply circuit is normal.
NO >> Refer to INL-15, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001601389
1.CHECK BATTERY SAVER OUTPUT/POWER SUPPLY OUTPUT
CONSULT-III
1. Turn ignition switch ON.
2. Select “BATTERY SAVER” of BCM (BATTERY SAVER) active
test item.
3. While operating the test item, check voltage between BCM con-
nector M20 terminal 56 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Replace BCM. Refer to BCS-55, "
Removal and Installation".
2.CHECK BATTERY SAVER OUTPUT/P OWER SUPPLY OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the following connectors.
-BCM M20
- Ignition keyhole illumination OFF : Interior room lamps OFF
ON : Interior room lamps ON
(+)
(-)Te s t i t e m
Voltag e
Connector Terminal BATTERY SAVER
M20 56 Ground OFF
0V
ON Battery voltage
ALLIA0408GB
Revision: March 2010 2008 QX56

INL-18
< COMPONENT DIAGNOSIS >
INTERIOR ROOM LAMP CONTROL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, door mirror connectors andfront room/map lamp assembly connector.
3. Check continuity between BCM connector M20 (A) terminal 63 and the door mirror connectors (B) and front room/map lamp
assembly connector (C).
4. Reconnect the front room/map lamp assembly connector.
5. Check continuity between BCM connector M20 (A) terminal 63 and the 2nd and 3rd row personal lamp connectors (B) terminal
1.
Is the inspection result normal?
YES >> Check interior room lamps for an open. If OK, replace BCM. Refer to BCS-55, "Removal and
Installation". If NG, replace interior room lamp. Refer to INL-59, "Removal and Installation".
NO >> Repair the harness or connectors.
3.CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, door mirror connectors and 2nd and 3rd row personal lamp connectors.
3. Switch the front room/map lamp assembly switch to ON posi- tion.
4. Check continuity between BCM connector M20 terminal 63 and ground.
Is the inspection result normal?
YES >> Check interior room lamps for a short circuit. If OK, replace BCM. Refer to BCS-55, "Removal and
Installation". If NG, replace interior room lamp. Refer to INL-59, "Removal and Installation".
NO >> Repair the harness or connectors.
BCM Interior room lamp
Continuity
Connector Terminal Component Connector Terminal
M20 (A) 63 Door mirror LH D4 (B) 13
Ye s
Door mirror RH D107 (B) 13
Front room/map
lamp assembly R102 (C) 1
AWLIA0968ZZ
BCM
Interior room lamp
Continuity
Connector Terminal Component Connector Terminal
M20 (A) 63 Personal lamp 2nd
row
R203 (B) 1
Ye s
Personal lamp 3rd
row R205 (B) 1
ALLIA0412GB
Connector
Terminal —Continuity
M20 63Ground No
ALLIA0413GB
Revision: March 2010 2008 QX56

INL-20
< COMPONENT DIAGNOSIS >
STEP LAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, front step lamp, rear step lampand foot lamp connectors.
3. Check continuity between BCM connector M20 (A) terminal 62 and step lamp connectors (B) and foot lamp connectors (C).
Is the inspection result normal?
YES >> Check step lamp or foot lamp for an open. If OK, replace BCM. Refer to BCS-55, "
Removal and Installation". If
NG, replace step lamp or foot lamp. Refer to INL-59,
"Removal and Installation".
NO >> Repair harness or connectors.
3.CHECK STEP LAMP SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, front and rear step lamp con- nectors and foot lamp connectors.
3. Check continuity between BCM connector M20 terminal 62 and ground.
Is the inspection result normal?
YES >> Check step lamp or foot lamp for a short circuit. If OK, replace BCM. Refer to BCS-55, "
Removal and Installa-
tion". If NG, replace step lamp or foot lamp. Refer to INL-59, "Removal and Installation".
NO >> Repair the harness or connectors.
Connector Terminal ConnectorTerminal Continuity
M20 (A) 62 Front step lamp LH D11 (B) 2
Ye s
Front step lamp RH D109 (B) 2
Rear step lamp LH D206 (B) 2
Rear step lamp
RH D306 (B) 2
Foot lamp LH M99 (C) 2
Foot lamp RH M100 (C) 2
ALLIA0415GB
Connector Terminal —Continuity
M20 62Ground No
ALLIA0416GB
Revision: March 2010 2008 QX56

INL-22
< COMPONENT DIAGNOSIS >
CARGO LAMP CONTROL CIRCUIT
YES >> Check cargo lamp for an open. If OK, replace BCM. Refer to BCS-55, "Removal and Installation".
If NG, replace cargo lamp. Refer to INL-64, "
Removal and Installation".
NO >> Repair harness or connectors.
3.CHECK CARGO LAMP SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M19 and cargo lamp connector.
3. Check continuity between BCM connector M19 terminal 49 and ground.
Is the inspection result normal?
YES >> Check cargo lamp for a short circuit. If OK, replace BCM. Refer to BCS-55, "
Removal and Installation". If
NG, replace cargo lamp. Refer to INL-64, "
Removal and
Installation".
NO >> Repair harness or connectors.
Connector Terminal —Continuity
M19 49Ground No
ALLIA0419GB
Revision: March 2010 2008 QX56

INL-24
< COMPONENT DIAGNOSIS >
IGNITION KEYHOLE ILLUMINATION CONTROL CIRCUIT
YES >> Check ignition keyhole illumination for an open. If OK, replace BCM. Refer to BCS-55, "Removal
and Installation". If NG, replace ignition keyhole illumination.
NO >> Repair harness or connectors.
3.CHECK IGNITION KEYHOLE ILLUMINATION SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M18 and ignition keyhole illumina- tion connector.
3. Check continuity between BCM connector M18 terminal 1 and ground.
Is the inspection result normal?
YES >> Check ignition keyhole illumination for a short circuit. If OK, replace BCM. Refer to BCS-55, "
Removal and
Installation". If NG, replace ignition keyhole illumination.
NO >> Repair harness or connectors.
Connector Terminal —Continuity
M18 1Ground No
ALLIA0422GB
Revision: March 2010 2008 QX56

PRECAUTIONSINL-57
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004900917
The Supplemental Restraint System such as “AIR 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 w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag 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 SR section.
• 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 Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric 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.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000004900918
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecti ng both battery cables with the ignition knob in the
″ LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS , an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
Revision: March 2010 2008 QX56

INT-8
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004900856
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 severity 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 w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag 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 unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified 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 Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c 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 minu tes before performing any service.
Precaution Necessary for Steering W heel Rotation After Battery Disconnect
INFOID:0000000004900857
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
Revision: March 2010 2008 QX56

IP-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004904116
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 severity 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 w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag 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 unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified 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 Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c 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 minu tes before performing any service.
Precaution Necessary for Steering W heel Rotation After Battery Disconnect
INFOID:0000000004904117
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
Revision: March 2010 2008 QX56

LAN
TROUBLE DIAGNOSISLAN-7
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
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TROUBLE DIAGNOSIS
Condition of Error DetectionINFOID:0000000001374966
“U1000” or “U1001” is indicated on SELF-DIAG RESULTS on CONSULT-III if CAN communication signal is
not transmitted or received between units for 2 seconds or more.
CAN COMMUNICATION SYSTEM ERROR
• CAN communication line open (CAN-H, CAN-L, or both)
• CAN communication line short (ground, betw
een CAN communication lines, other harnesses)
• Error of CAN communication control circuit of the unit connected to CAN communication line
WHEN “U1000” OR “U1001” IS INDICATED EV EN THOUGH CAN COMMUNICATION SYSTEM IS
NORMAL
• Removal/installation of parts: Error may be detec ted when removing and installing CAN communication unit
and related parts while turning the ignition switch ON. (A DTC except for CAN communication may be
detected.)
• Fuse blown out (removed): CAN communication of the unit may cease.
• Voltage drop: Error may be detected if voltage drops due to discharged battery when turning the ignition
switch ON (Depending on the control unit which carries out CAN communication).
• Error may be detected if the power supply circuit of the control unit, which carries out CAN communication,
malfunctions (Depending on the control unit which carries out CAN communication).
• Error may be detected if reprogramming is not completed normally.
NOTE:
CAN communication system is normal if “U1000” or “U 1001” is indicated on SELF-DIAG RESULTS of CON-
SULT-III under the above conditions. Erase the memory of the self-diagnosis of each unit.
Symptom When Error Occurs in CAN Communication SystemINFOID:0000000001374967
In CAN communication system, multiple units mutually transmit and receive signals. Each unit cannot transmit
and receive signals if any error occurs on CAN communicati on line. Under this condition, multiple control units
related to the root cause malfunction or go into fail-safe mode.
ERROR EXAMPLE
NOTE:
• Each vehicle differs in symptom of each unit under fail-safe mode and CAN communication line wiring.
• Refer to LAN-36, "
Abbreviation List" for the unit abbreviation.
Example: TCM branch line open circuit
SKIB8738E
Unit name Symptom
ECM Engine torque limiting is affected, and shift harshness increases.
BCM Reverse warning chime does not sound.
Revision: March 2010 2008 QX56

LAN
PRECAUTIONSLAN-37
< PRECAUTION > [CAN]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental
Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004832404
The Supplemental Restraint System such as “AIR 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 w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag 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 SR section.
• 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 Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric 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.
Precautions for Trouble DiagnosisINFOID:0000000001282381
CAUTION:
• Never apply 7.0 V or more to the measurement terminal.
• Use a tester with open terminal voltage of 7.0 V or less.
• Turn the ignition switch OFF and disconnect th e battery cable from the negative terminal when
checking the harness.
Precautions for Harness RepairINFOID:0000000001282382
• Solder the repaired area and wrap tape around the soldered area.
NOTE:
A fray of twisted lines must be within 110 mm (4.33 in).
SKIB8766E
Revision: March 2010 2008 QX56