INFINITI QX56 2010 Factory Service Manual

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
EXL-135
< ECU DIAGNOSIS >
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DTC IndexINFOID:0000000005369902
NOTE:
The details of TIME display are as follows.
• CRNT: The malfunctions that are detected now
• 1 - 39: The number is indicated when it is normal at present and a malfunction was detected in the past. It
increases like 0 → 1 → 2 ··· 38 → 39 after returning to the normal condition whenever IGN OFF → ON. It is
fixed to 39 until the self-diagnosis results are erased if it is over 39. It returns to 0 when a malfunction is
detected again in the process.
CONSULT-III display Fail-safe
TIMENOTERefer to
No DTC is detected.
further testing
may be required. ————
U1000: CAN COMM CIRCUIT ×CRNT 1 – 39 PCS-17
Revision: April 20092010 QX56

EXL-136
< SYMPTOM DIAGNOSIS >
EXTERIOR LIGHTING SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
EXTERIOR LIGHTING SYSTEM SYMPTOMS
Symptom TableINFOID:0000000005146686
CAUTION:
Perform the self-diagnosis with CONSULT-III before the symptom diagnosis. Perform the trouble diag-
nosis if any DTC is detected.
Symptom Possible causeInspection item
Headlamp does not
switch to the high beam. One side•Fuse
• Harness between IPDM E/R
and the front combination lamp
• Front combination lamp
(High beam relay)
• IPDM E/R Headlamp (HI) circuit
Refer to EXL-30, "
Description".
Both sides Symptom diagnosis
"BOTH SIDE HEADLAMPS DO NOT SWITCH TO HIGH BEAM"
Refer to
EXL-139
.
High beam indicator lamp is not turned ON.
(Headlamp switches to the high beam.) • Combination meter
•BCM• Combination meter.
Data monitor "HI-BEAM IND".
• BCM (HEAD LAMP) Active test "HEADLAMP".
Headlamp does not
switch to the low beam. One side
Front combination lamp (Low
beam relay)
—
Both sides • Combination switch (lighting
and turn signal switch)
• Harness between the combina-
tion switch and BCM
•BCM Combination switch
Refer to BCS-38
.
High beam request signal
•BCM
• IPDM E/R IPDM E/R
Data monitor "HL HI REQ".
IPDM E/R —
Headlamp does not turn
ON. One side•Fuse
•Bulb
• Harness between IPDM E/R
and the front combination lamp
• Front combination lamp
• IPDM E/R Headlamp (L
O) circuit
Refer to EXL-33
.
Both sides Symptom diagnosis
"BOTH SIDE HEADLAMPS (LO) ARE NOT TURNED ON"
Refer to
EXL-140, "
Description".
Headlamp does not turn
OFF. When the ignition
switch is turned ON•BCM
• Combination switch (lighting
and turn signal switch) Combination switch (lighting and
turn signal switch)
Refer to BCS-38
.
Headlamp is not turned ON/OFF with the lighting
switch AUTO. • Combination switch (lighting
and turn signal switch)
• Harness between the combina-
tion switch and BCM
•BCM Combination switch (lighting and
turn signal switch)
Refer to BCS-38
.
• Optical sensor
• Harness between the optical sensor and BCM
•BCM Optical sensor
Refer to EXL-47
.
Revision: April 20092010 QX56

EXTERIOR LIGHTING SYSTEM SYMPTOMSEXL-137
< SYMPTOM DIAGNOSIS >
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Daytime light system does not activate. • Either high beam bulb
• Parking brake switch
• Combination switch (lighting
and turn signal switch)
•BCM
• IPDM E/R
• Daytime light relay
• Harness between IPDM E/R
and daytime light relay. Daytime light system description.
Refer to
EXL-9, "System Descrip-
tion".
Front fog lamp is not
turned ON. One side
• Front fog lamp bulb
• Harness between IPDM E/R
and the front combination lamp
• Front combination lamp
• IPDM E/R Front fog lamp circuit
Refer to
EXL-36
.
Both sides Symptom diagnosis
"BOTH SIDE FRONT FOG LAMPS ARE NOT TURNED ON"
Refer to EXL-142
.
Parking lamp is not turned
ON. One side•Fuse
• Parking lamp bulb
• Harness between IPDM E/R
and the front/rear combination
lamp
• Front/rear combination lamp
• IPDM E/R Parking lamp circuit
Refer to
EXL-38
.
Both sides Symptom diagnosis
"PARKING, LICENSE PLATE AND TAIL LAMPS ARE NOT TURNED
ON"
Refer to EXL-141
.
Turn signal lamp does not
blink. Indicator lamp is nor-
mal.
(The applicable side
performs the high flash-
er activation).• Harness between BCM and
each turn signal lamp
• Turn signal lamp bulb
• Door mirror Turn signal lamp circuit
Refer to
EXL-44
.
Turn signal indicator lamp
does not blink. One side
Combination meter —
Both sides
(Always) • Turn signal indicator lamp sig-
nal
• Combination meter
•BCM • Combination meter.
Data monitor "TURN IND".
• BCM (FLASHER) Active test "FLASHER".
Both sides
(Does blink when acti-
vating the hazard warn-
ing lamp with the
ignition switch OFF) • The combination meter power
supply and the ground circuit
• Combination meter Combination meter
Power supply and the ground circuit
Refer to
MWI-28
.
Symptom
Possible causeInspection item
Revision: April 20092010 QX56

EXL-138
< SYMPTOM DIAGNOSIS >
NORMAL OPERATING CONDITION
NORMAL OPERATING CONDITION
DescriptionINFOID:0000000005146687
XENON HEADLAMPS
The brightness and color of the light may vary slightly immediately after turning the headlamp ON. This condi-
tionwill remain until the xenon bulb becomes stable. This is normal.
• Illumination time lag may occur between right and left. This is normal.
AUTO LIGHT SYSTEM
The auto light system may not turn the headlamp ON/OF F immediately after passing a dark area or a bright
area (short tunnel, sky bridge, shadowed area etc.). This is normal.
Revision: April 20092010 QX56

BOTH SIDE HEADLAMPS DO NOT SWITCH TO HIGH BEAM
EXL-139
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BOTH SIDE HEADLAMPS DO NOT SWITCH TO HIGH BEAM
DescriptionINFOID:0000000005146688
The headlamps (both sides) do not switch to high beam when the combination switch (lighting and turn signal
switch) is in the HI or PASS setting.
Diagnosis ProcedureINFOID:0000000005146689
1.COMBINATION SWITCH (LIGHTING AND TURN SIGNAL SWITCH) INSPECTION
Check the combination switch (lighting and turn signal switch). Refer to BCS-38, "
Diagnosis Procedure".
Is the combination switch (lighting and turn signal switch) normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning part.
2.CHECK HEADLAMP (HI) REQUEST SIGNAL INPUT
CONSULT-III DATA MONITOR
1. Select "HL HI REQ" of IPDM E/R DATA MONITOR item.
2. With operating the combination switch (lighting and turn signal switch), check the monitor status.
Is the item status normal?
YES >> GO TO 3.
NO >> Replace BCM. Refer to BCS-59, "
Removal and Installation" .
3.HEADLAMP (HI) CIRCUIT INSPECTION
Check the headlamp (HI) circuit. Refer to EXL-30, "
Description".
Is the headlamp (HI) circuit normal?
YES >> Replace IPDM E/R. Refer to PCS-35, "Removal and Installation of IPDM E/R" .
NO >> Repair or replace the malfunctioning part.
Monitor item ConditionMonitor status
HL HI REQ Combination switch (lighting and
turn signal switch)
(2ND) HI or PASS
ON
Except for HI or
PASS OFF
Revision: April 20092010 QX56

EXL-140
< SYMPTOM DIAGNOSIS >
BOTH SIDE HEADLAMPS (LO) ARE NOT TURNED ON
BOTH SIDE HEADLAMPS (LO) ARE NOT TURNED ON
DescriptionINFOID:0000000005146690
The headlamps (both sides) do not turn ON in any combination switch (lighting and turn signal switch) setting.
Diagnosis ProcedureINFOID:0000000005146691
1.COMBINATION SWITCH (LIGHTING AND TURN SIGNAL SWITCH) INSPECTION
Check the combination switch (lighting and turn signal switch). Refer to BCS-38, "
Diagnosis Procedure".
Is the combination switch (lighting and turn signal switch) normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning part.
2.CHECK HEADLAMP (LO) REQUEST SIGNAL INPUT
CONSULT-III DATA MONITOR
1. Select "HL LO REQ" of IPDM E/R DATA MONITOR item.
2. With operating the combination switch (lighting and turn signal switch), check the monitor status.
Is the item status normal?
YES >> GO TO 3.
NO >> Replace BCM. Refer to BCS-59, "
Removal and Installation" .
3.HEADLAMP (LO) CIRCUIT INSPECTION
Check the headlamp (LO) circuit. Refer to EXL-33, "
Description".
Is the headlamp (LO) circuit normal?
YES >> Replace IPDM E/R. Refer to PCS-35, "Removal and Installation of IPDM E/R" .
NO >> Repair or replace the malfunctioning part.
Monitor item ConditionMonitor status
HL LO REQ Combination switch
(lighting and turn signal
switch) 2ND
ON
OFF OFF
Revision: April 20092010 QX56

PARKING, LICENSE PLATE AND TAIL LAMPS ARE NOT TURNED ON
EXL-141
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PARKING, LICENSE PLATE AND TA IL LAMPS ARE NOT TURNED ON
DescriptionINFOID:0000000005146692
The parking, license plate and tail lamps do not turn ON in with any combination switch (lighting and turn sig-
nal switch) setting.
Diagnosis ProcedureINFOID:0000000005146693
1.COMBINATION SWITCH (LIGHTING AND TURN SIGNAL SWITCH) INSPECTION
Check the combination switch (lighting and turn signal switch). Refer to BCS-38, "
Diagnosis Procedure".
Is the combination switch (lighting and turn signal switch) normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning part.
2.CHECK TAIL LAMP RELAY REQUEST SIGNAL INPUT
CONSULT-III DATA MONITOR
1. Select "TAIL & CLR REQ" of IPDM E/R DATA MONITOR item.
2. With operating the combination switch (lighting and turn signal switch), check the monitor status.
Is the item status normal?
YES >> GO TO 3.
NO >> Replace BCM. Refer to BCS-59, "
Removal and Installation".
3.PARK LAMP CIRCUIT INSPECTION
Check the parking lamp circuit. Refer to EXL-38, "
Description".
Is the tail lamp circuit normal?
YES >> Replace IPDM E/R. Refer to PCS-35, "Removal and Installation of IPDM E/R".
NO >> Repair or replace the malfunctioning part.
Monitor item ConditionMonitor status
TAIL & CLR
REQ combination switch (lighting
and turn signal switch) 1ST
ON
OFF OFF
Revision: April 20092010 QX56

EXL-142
< SYMPTOM DIAGNOSIS >
BOTH SIDE FRONT FOG LAMPS ARE NOT TURNED ON
BOTH SIDE FRONT FOG LA MPS ARE NOT TURNED ON
DescriptionINFOID:0000000005146694
The front fog lamps do not turn ON in any setting.
Diagnosis ProcedureINFOID:0000000005146695
1.COMBINATION SWITCH (LIGHTING AND TURN SIGNAL SWITCH) INSPECTION
Check the combination switch (lighting and turn signal switch). Refer to BCS-38, "
Diagnosis Procedure".
Is the combination switch (lighting and turn signal switch) normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning part.
2.CHECK FRONT FOG LAMP REQUEST SIGNAL INPUT
CONSULT-III DATA MONITOR
1. Select "FR FOG REQ" of IPDM E/R DATA MONITOR item.
2. With operating the front fog lamp switch, check the monitor status.
Is the item status normal?
YES >> GO TO 3.
NO >> Replace BCM. Refer to BCS-59, "
Removal and Installation".
3.FRONT FOG LAMP CIRCUIT INSPECTION
Check the front fog lamp circuit. Refer to EXL-36, "
Description".
Is the front fog lamp circuit normal?
YES >> Replace IPDM E/R. Refer to PCS-35, "Removal and Installation of IPDM E/R".
NO >> Repair or replace the malfunctioning part.
Monitor item ConditionMonitor status
FR FOG REQ Front fog lamp switch
(combination switch (lighting
and turn signal switch) 2ND) ON ON
OFF OFF
Revision: April 20092010 QX56

PRECAUTIONSEXL-143
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005369809
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:0000000005369810
NOTE:
• Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
• After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnect ed or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, 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. Carry the Intelligent Key or insert it to the key slot and turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon- nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
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EXL-144
< PRECAUTION >
PRECAUTIONS
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button igniti on switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
General precautions for service operationsINFOID:0000000005369811
• When removing or disassembling any part, be careful not to damage or deform it. Protect parts which may
get in the way with cloth.
• When removing parts with a screw driver or other tool , protect parts by wrapping them with vinyl or tape.
• Keep removed parts protected with cloth.
• If an non-reuseable part is removed, replace it with a new one.
• After re-assembly has been completed, make sure each part functions correctly.
• Never work with wet hands.
• Turn the combination switch (lighting and turn signal switch) OFF before disconnecting and connecting the connector.
• Do not use organic solvent (paint thinner or gasoline) to clean lamps or remove sealant residue.
Revision: April 20092010 QX56