INFINITI QX56 2011 Factory Service Manual

DAS-266
< BASIC INSPECTION >[FCW]
DIAGNOSIS AND REPAIR WORK FLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work FlowINFOID:0000000006223691
OVERALL SEQUENCE
DETAILED FLOW
NOTE:
The FCW system shares component parts with the ICC
system. If the FCW system has a malfunction perform
diagnosis for the ICC system.
1.INTERVIEW FOR MALFUNCTION
JPOIA0171GB
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DAS
DIAGNOSIS AND REPAIR WORK FLOWDAS-267
< BASIC INSPECTION > [FCW]
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It is also important to clarify t he customer concerns before starting t he inspection. Interview the customer
about the concerns carefully and understand the symptoms fully.
NOTE:
The customers are not professionals. Never assume t hat “maybe the customer means···” or “maybe the cus-
tomer mentioned this symptom”.
>> GO TO 2.
2.SELF-DIAGNOSIS WITH CONSULT-III
1. Perform “All DTC Reading” with CONSULT-III.
2. Check if the DTC is detected on the self-diagnosis results of “ICC/ADAS”.
Is any DTC detected?
YES >> GO TO 5.
NO >> GO TO 3.
3.ACTION TEST
Perform the ICC system action test to check the operation status. Refer to CCS-77, "
Description".
>> GO TO 4.
4.SYMPTOM DIAGNOSIS
Perform the applicable diagnosis according to the diagnosis chart by symptom. Refer to DAS-268, "
Symptom
Table".
>> GO TO 6.
5.TROUBLE DIAGNOSIS BY DTC
1. Check the DTC in the self-diagnosis results.
2. Perform trouble diagnosis for the detected DTC. Refer to DAS-244, "
DTC Index".
>> GO TO 6.
6.MALFUNCTIONING PART REPAIR
Repair or replace the identified malfunctioning parts.
>> GO TO 7.
7.REPAIR CHECK (SELF-DIAGNOSIS WITH CONSULT-III)
1. Erases self-diagnosis results.
2. Perform “All DTC Reading” again after repa iring or replacing the specific items.
3. Check if the DTC is detected on the self-diagnosis results of “ICC/ADAS”.
Is any DTC detected?
YES >> GO TO 5.
NO >> GO TO 8.
8.REPAIR CHECK (ACTION TEST)
Perform the ICC system action test. Check that the malfunction symptom is solved or no other symptoms
occur.
Is there any malfunction symptom?
YES >> GO TO 4.
NO >> INSPECTION END
Revision: 2010 May2011 QX56

DAS-268
< SYMPTOM DIAGNOSIS >[FCW]
FORWARD COLLISION WARNING SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
FORWARD COLLISION WA
RNING SYSTEM SYMPTOMS
Symptom TableINFOID:0000000006223692
CAUTION:
Perform the self-diagnosis with CONSULT-III before the symptom diagnosis. Perform the trouble diag-
nosis if any DTC is detected.
Symptom Possible cause Inspection item/Reference page
FCW system is not activated Warning systems ON indica-
tor is not turned ON
⇔ OFF
when operating warning sys-
tems switch  Warning systems switch
 Harness between ADAS con-
trol unit and warning systems
switch
 Harness between warning systems switch and ground
 ADAS control unit Warning systems switch circuit
DAS-269
Revision: 2010 May2011 QX56

DAS
FCW SYSTEM IS NOT ACTIVATEDDAS-269
< SYMPTOM DIAGNOSIS > [FCW]
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FCW SYSTEM IS NOT ACTIVATED
DescriptionINFOID:0000000006223693
FCW system does not operate by pre ssing the warning systems switch.
NOTE:
Warning systems switch is shared with LDW/BSW system.
Diagnosis ProcedureINFOID:0000000006223694
1.PERFORM THE SELF-DIAGNOSIS
1. Perform “All DTC Readi ng” with CONSULT-III.
2. Check if the DTC is detected in self-d iagnosis results of “ICC/ADAS”. Refer to DAS-244, "
DTC Index".
Is any DTC detected?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK WARNING SYST EMS SWITCH CIRCUIT
Check warning systems switch circuit. Refer to DAS-389, "
Component Function Check".
NOTE:
Warning systems switch is shared with LDW/BSW system.
Is the inspection result normal?
YES >> Replace the ADAS control unit.
NO >> GO TO 3.
3.REPAIR OR REPLACE THE SPECIFIC ITEMS
Repair or replace malfunctioning items.
>> INSPECTION END
Revision: 2010 May2011 QX56

DAS-270
< SYMPTOM DIAGNOSIS >[FCW]
NORMAL OPERATING CONDITION
NORMAL OPERATING CONDITION
DescriptionINFOID:0000000006223695
PRECAUTIONS FOR FORWARD COLLISION WARNING (FCW)
 FCW system is intended to warn the driver before a col
lision but will not avoid a collision. It is the drive's
responsibility to stay alert, drive safely and be in control of the vehicle at all times.
 As there is a performance limit, the FCW system may not provide a warning in certain conditions.
 The FCW system will not detect the following objects.
- Pedestrians, animals, or obstacles in the roadway.
- Oncoming vehicles in the same lane
 FCW system will not detect under the following conditions.
- When the sensor gets dirty, it is impossibl e to detect the distance from the vehicle ahead.
- When driving into a strong light (i.e. sunlight)
 The sensor generally detects signals returned from t he reflectors on a vehicle ahead. Therefore, the FCW
system may not warn properly under the following conditions:
- When the reflectors of the vehicle ahead are positioned hi gh or close to each other (including a small vehicle
such as motorcycles).
- When the sensor gets dirty or it is impossible to detect the distance to the vehicle ahead.
- When the reflectors on the vehicle ahead is missing, damaged or covered.
- When the reflector of the vehicle ahead is covered with dirt, snow or road spray.
- When visibility is low (such as rain, fog, snow, etc.).
- When snow or road spray from traveling vehicles are splashed.
- When dense exhaust or other smoke (black smoke) from vehicles reduces the visibility of the sensor.
- When excessively heavy baggage is loaded in the rear seat or the trunk room of own vehicle.
- When abruptly accelerating or decelerating.
- On steep downhill or roads with sharp curves.
- When there is a highly reflective object near the vehicle ahead. i.e.) very close to other vehicle, signboard, etc.
- When own vehicle are towing a trailer.
 Depending on certain road conditions (curved, beginning of a curve), vehicle conditions (steering position,
vehicle position), or preceding vehicl e's conditions (position in lane, etc.), the FCW system may not function
properly. The FCW system may detect highly reflective obj ects such as reflectors, signs, white markers, and
other stationary objects on the road or near the traveling lane, and provide unnecessary warning.
 The FCW system may not function in offset conditions.
 The FCW system may not functi on when the distance to the vehicle ahead is extremely close.
 The FCW system is designed to automatically check the s ensor's functionality. If the sensor is covered with
ice, a transparent or translucent plastic bag, etc., the system may not detect them. In these instances the
FCW system may not be able to warn properly. Be sure to check and clean the sensor regularly.
 Excessive noise will interfere with the warning chime sound, and the chime may not be heard.
 A sudden appearance of the vehicle in front (i.e.: w hen a vehicle abruptly cuts in) may not be detected and
the system may not warn soon enough.
 The FCW system will be canceled autom atically with a chime sound and the IBA OFF indicator light will illu-
minate under the following conditions:
- When the sensor window is dirty
- When the FCW system malfunctions
Revision: 2010 May2011 QX56

DAS
WARNING SYSTEMS SWITCHDAS-271
< REMOVAL AND INSTALLATION > [FCW]
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REMOVAL AND INSTALLATION
WARNING SYSTEMS SWITCH
Removal and InstallationINFOID:0000000006223696
REMOVAL
1. Remove the instrument lower panel (LH). Refer to IP-14, "Removal and Installation".
2. Remove warning systems switch from instrument driver lower panel.
NOTE:
Warning systems switch and automatic back door switch are integrated.
INSTALLATION
Install in the reverse order of removal.
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DAS-272
< PRECAUTION >[LDW & LDP]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006223697
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 w hether 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 inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/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 “SRS AIR BAG”.
 Do not use electrical test equipmen t 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 minu tes before performing any service.
Precautions For Harness RepairINFOID:0000000006223698
ITS communication uses a twisted pair line. Be careful when repairing it.
 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: 2010 May2011 QX56

DAS
PRECAUTIONSDAS-273
< PRECAUTION > [LDW & LDP]
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 Bypass connection is never allowed at the repaired area. NOTE:
Bypass connection may cause ITS communication error. The
spliced wire becomes separated and t he characteristics of twisted
line are lost.
Precaution for LDW/LDP System ServiceINFOID:0000000006223699
WARNING:
Be careful of traffic conditions and safety aro und the vehicle when performing road test.
CAUTION:
 Never use the LDP system when driving with free rollers or a chassis dynamometer.
 Never perform the active test while driving.
 Never disassemble and remodel the lane camera unit.
 Do not use the lane camera unit that is removed from the vehicle.
 Never change LDW initial state ON ⇒ OFF without the con sent of the customer.
SKIB8767E
Revision: 2010 May2011 QX56

DAS-274
< SYSTEM DESCRIPTION >[LDW & LDP]
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
LANE DEPARTURE WARNING (LDW) SYSTEM
LANE DEPARTURE WARNING (LDW) S
YSTEM : Component Parts Location
INFOID:0000000006223700
LANE DEPARTURE WARNING (LDW) SYSTEM : Component DescriptionINFOID:0000000006223701
1. Lane camera unit 2. Lane departure warning lamp (Yel-
low)
(On the combination meter)3. Warning systems switch
4. Warning systems ON indicator 5. ABS actuator and electric unit (con-
trol unit)
Refer to BRC-10, "
Component Parts
Location"
6. BCM
Refer to BCS-4, "
BODY CONTROL
SYSTEM : Component Parts Loca-
tion"
7. Warning buzzer 8. ADAS control unit
Refer to DAS-13, "
Component Parts
Location"
A. Front of the map lamp B. Instrument lower panel (LH) C. Behind of instrument lower panel
(LH)
JSOIA0367ZZ
Component Description
ADAS control unit  Judges the lane departure depending on the lane detection result and each signals
 Controls the warning buzzer and the warning systems ON indicator
 Transmits lane departure warning lamp signal to combination meter via CAN communica-
tion
Lane camera unit  Detects the lane marker in travel lane
 Transmits the detected lane condition signal to ADAS control unit via ITS communication
ABS actuator and electric unit (con-
trol unit) Transmits the vehicle speed signal (wheel speed) to ADAS control unit via CAN communica-
tion
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DAS
COMPONENT PARTSDAS-275
< SYSTEM DESCRIPTION > [LDW & LDP]
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LANE DEPARTURE PREVENTION (LDP) SYSTEM
LANE DEPARTURE PREVENTION (LDP) SYSTEM : Component Parts Location
INFOID:0000000006223702
Warning systems switch Inputs the warning systems switch signal to ADAS control unit
Warning systems ON indicator
(On the warning systems switch) Turns on the warning systems ON indicator, according to an warning systems ON indicator
signal received from the ADAS control unit
Warning buzzer Activates the warning buzzer, according to a warning buzzer signal received from the ADAS
control unit
Combination meter Turns the lane departure warning lamp ON/OFF according to the signals from ADAS control
unit via CAN communication
BCM Transmits the turn indicator signal to ADAS control unit via CAN communication Component Description
1. Lane camera unit 2. Dynamic driver assistance switch
(On the ICC steering switch)3.  Lane departure warning lamp (Yel-
low)
 LDP ON indicator (Green)
(On the combination meter)
4. Transfer control unit Refer to DLN-10, "
Component Parts
Location"
5. AV control unit
Refer to AV- 9 , "
Component Parts Lo-
cation"
6. ECM
Refer to EC-16, "
Component Parts
Location"
7. TCM
Refer to TM-10, "
A/T CONTROL
SYSTEM : Component Parts Loca-
tion"
8. ABS actuator and electric unit (con-
trol unit)
Refer to BRC-10, "
Component Parts
Location"
9. BCM
Refer to BCS-4, "
BODY CONTROL
SYSTEM : Compon ent Parts Loca-
tion"
10. Warning buzzer 11. Steering angle sensor
Refer to BRC-10, "
Component Parts
Location"
12. ADAS control unit
Refer to DAS-13, "
Component Parts
Location"
A. Front of map lamp B. Behind instrument lower panel (LH)
JSOIA0368ZZ
Revision: 2010 May2011 QX56