BATTERY INFINITI QX56 2011 Factory Service Manual

CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
CHG-17
< BASIC INSPECTION >
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B A
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POWER GENERATION VOLTAGE VA
RIABLE CONTROL SYSTEM OPER-
ATION INSPECTION
Inspection ProcedureINFOID:0000000006274867
CAUTION:
When performing this inspection, always use a charged battery that has completed the battery inspec-
tion. (When the charging rate of the battery is low, the response speed of the voltage change will
become slow. This can cause an incorrect inspection.)
1.CHECK ECM (CONSULT-III)
Perform ECM self-diagnosis with CONSULT-III. Refer to EC-63, "
CONSULT-III Function".
Self
-diagnostic results content
No malfunction detected>> GO TO 2.
Malfunction detected>> Check applicable parts, and repair or replace corresponding parts.
2.CHECK OPERATION OF POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
1. Connect CONSULT-III and start the engine.
2. shift the selector lever to “P” or “N” position and turn off all of the electric loads and A/C, etc.
3. Select “ALTERNATOR DUTY” at “Active Test” of “ENGINE”, and then check the value of “BATTERY
VOLT” monitor when DUTY value of “ALTERNATOR DUTY” is set to 40.0 %.
4. Check the value of “BATTERY VOLT” monitor when DUTY value of “ALTERNATOR DUTY” is set to 80.0%.
Is the measurement value within the specification?
YES >> INSPECTION END
NO >> GO TO 3.
3.CHECK IPDM E/R (CONSULT-III)
Perform IPDM E/R self-diagnosis with CONSULT-III. Refer to PCS-12, "
CONSULT-III Function (IPDM E/R)".
Self
-diagnostic results content
No malfunction detected>> GO TO 4.
Malfunction detected>> Check applicable parts, and repair or replace corresponding parts.
4.CHECK HARNESS BETWEEN ALTE RNATOR AND IPDM E/R
1. Turn ignition switch OFF.
2. Disconnect alternator harness connec tor and IPDM E/R harness connector.
3. Check continuity between alternator har ness connector and IPDM E/R harness connector.
4. Check continuity between alte rnator harness connector and ground.
“BATTERY VOLT”
2 seconds after setting the
DUTY value of “ALTERNA-
TOR DUTY” to 40.0 %
: 12 - 13.6 V
“BATTERY VOLT”
20 seconds after setting
the DUTY value of “ALTER-
NATOR DUTY” to 80.0 % : +0.5 V or more against
the value of “BATTERY
VOLT” monitor when
DUTY value is 40.0 %
Alternator IPDM E/R
Continuity
Connector Terminal Connector Terminal
E205 5 E13 33 Existed
Revision: 2010 May2011 QX56

CHG
B TERMINAL CIRCUITCHG-19
< DTC/CIRCUIT DIAGNOSIS >
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DTC/CIRCUIT DIAGNOSIS
B TERMINAL CIRCUIT
DescriptionINFOID:0000000006274868
“B” terminal circuit supplies power to charge the bat
tery and to operate the vehicle’s electrical system.
Diagnosis ProcedureINFOID:0000000006274869
1.CHECK “B” TERMINAL CONNECTION
1. Turn ignition switch OFF.
2. Check that “B” terminal is clean and tight.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair “B” terminal connection. Confirm repair by performing complete Starting/Charging system test. Refer to Technical Service Bulletin.
2.CHECK “B” TERMINAL CIRCUIT
Check voltage between alternator “B” terminal and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check harness for open between alternator and fusible link.
3.CHECK “B” TERMINAL CONNECT ION (VOLTAGE DROP TEST)
1. Start engine, then engine running at idle and warm.
2. Check voltage between battery positive terminal and alternator “B” terminal.
Is the inspection result normal?
YES >> “B” terminal circuit is normal. Refer to CHG-13, "Work Flow".
NO >> Check harness between battery and alternator for poor continuity.
(+)
(–) Voltage
Alternator “B” terminal
E203 1 Ground Battery voltage
(+) (–)
Voltage (V)
(Approx.)
Alternator “B” terminal Terminal
Battery positive terminal E203 1 Less than 0.2
Revision: 2010 May2011 QX56

CHG-20
< DTC/CIRCUIT DIAGNOSIS >
L TERMINAL CIRCUIT (OPEN)
L TERMINAL CIRCUIT (OPEN)
DescriptionINFOID:0000000006274870
The “L” terminal circuit controls the charge warning lamp. The charge warning lamp illuminates when the igni-
tion switch is set to ON or START. When the alternat or is providing sufficient voltage with the engine running,
the charge warning lamp will go off. If the charge warn ing lamp illuminates with the engine running, a malfunc-
tion is indicated.
Diagnosis ProcedureINFOID:0000000006274871
1.CHECK “L” TERMINAL CONNECTION
1. Turn ignition switch OFF.
2. Check that “L” terminal is clean and tight.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair “L” terminal connection. Confirm repair by performing complete Starting/Charging system test. Refer to Technical Service Bulletin.
2.CHECK “L” TERMIN AL CIRCUIT (OPEN)
1. Disconnect alternator connector.
2. Apply ground to alternator harness connector terminal.
3. Check condition of the charge warning lamp with the ignition switch in the ON position.
Does it illuminate?
YES >> “L” terminal circuit is normal. Refer to CHG-13, "Work Flow".
NO >> GO TO 3.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the battery cable from the negative terminal.
2. Disconnect the combination meter connector.
3. Check continuity between alternator harness connector and combination meter harness connector.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair the harness or connector.
4.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
Check continuity between combination me ter harness connector and fuse block (J/B).
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair the harness or connector.
5.CHECK POWER SUPPLY CIRCUIT
(+) (–) Condition Charge warning lamp
Alternator
Connector Terminal E205 3 Ground Ignition switch ON ON
Alternator Combination meter Continuity
Connector Terminal Connector Terminal
E205 3 M34 25 Existed
Combination meter Fuse block (J/B) Continuity
Connector Terminal Connector Terminal
M34 2 M1 2A Existed
Revision: 2010 May2011 QX56

CHG
L TERMINAL CIRCUIT (OPEN)CHG-21
< DTC/CIRCUIT DIAGNOSIS >
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1. Connect the battery cable to the negative terminal.
2. Check voltage between combination meter harness connector and ground.
Is the inspection result normal?
YES >> Replace combination meter.
NO >> Inspect the power supply circuit. Refer to
PG-89, "
Wiring Diagram - IGNITION POWER SUPPLY -
".
(+)
(–) Condition Voltage
Combination meter
Connector Terminal M34 2 Ground Ignition switch ON Battery voltage
Revision: 2010 May2011 QX56

CHG-22
< DTC/CIRCUIT DIAGNOSIS >
L TERMINAL CIRCUIT (SHORT)
L TERMINAL CIRCUIT (SHORT)
DescriptionINFOID:0000000006274872
The “L” terminal circuit controls the charge warning lamp. The charge warning lamp illuminates when the igni-
tion switch is set to ON or START. When the alternat or is providing sufficient voltage with the engine running,
the charge warning lamp will go off. If the charge warn ing lamp illuminates with the engine running, a malfunc-
tion is indicated.
Diagnosis ProcedureINFOID:0000000006274873
1.CHECK “L” TERMINAL CIRCUIT (SHORT)
1. Turn ignition switch OFF.
2. Disconnect alternator connector.
3. Turn ignition switch ON.
Does charge warning lamp illuminate?
YES >> GO TO 2.
NO >> Refer to CHG-13, "
Work Flow".
2.CHECK HARNESS CONTI NUITY (SHORT CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect combination meter connector.
4. Check continuity between combination meter harness connector and ground.
Is the inspection result normal?
YES >> Replace combination meter.
NO >> Repair the harness or connector.
Combination meter
GroundContinuity
Connector Terminal
M34 25 Not existed
Revision: 2010 May2011 QX56

CHG
S TERMINAL CIRCUITCHG-23
< DTC/CIRCUIT DIAGNOSIS >
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S TERMINAL CIRCUIT
DescriptionINFOID:0000000006274874
The output voltage of the alternator is controlled by t
he IC voltage regulator at the “S” terminal detecting the
input voltage.
The “S” terminal circuit detects the battery voltage to adjust the alternator output voltage with the IC voltage
regulator.
Diagnosis ProcedureINFOID:0000000006274875
1.CHECK “S” TERMINAL CONNECTION
1. Turn ignition switch OFF.
2. Check if “S” terminal is clean and tight.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair “S” terminal connection. Confirm repair by performing complete Starting/Charging system test. Refer to Technical Service Bulletin.
2.CHECK “S” TERMINAL CIRCUIT
Check voltage between alternator harness connector and ground.
Is the inspection result normal?
YES >> Refer to CHG-13, "Work Flow".
NO >> Check harness for open between alternator and fuse.
(+)
(–) Voltage
Alternator
Connector Terminal E205 4 Ground Battery voltage
Revision: 2010 May2011 QX56

CHG-24
< SYMPTOM DIAGNOSIS >
CHARGING SYSTEM
SYMPTOM DIAGNOSIS
CHARGING SYSTEM
Symptom TableINFOID:0000000006274876
Symptom Reference
Discharged battery
Refer to CHG-13, "
Work Flow".
The charge warning lamp does not illuminate when the ignition
switch is set to ON.
The charge warning lamp does not turn OFF after the engine
starts.
The charging warning lamp turns ON when increasing the engine
speed.
Revision: 2010 May2011 QX56

CHG-26
< REMOVAL AND INSTALLATION >
ALTERNATOR
Type: A002TX1491
Removal and InstallationINFOID:0000000006274878
REMOVAL
1. Disconnect the battery cable from the negative terminal. Refer to PG-164, "Removal and Installation".
2. Remove front under cover. Refer to EXT-25, "
Removal and Installation".
3. Remove drive belt. Refer to EM-20, "
Removal and Installation".
4. Disconnect engine oil pressure switch connector (A) and alter- nator connector (B).
5. Remove harness bracket bolt (C).
6. Remove “B” terminal nut (D) and disconnect “B” terminal har- ness.
JMMIA0363GB
1. Rear bearing 2. Rotor assembly 3. Retainer
4. Front bearing 5. Front bracket assembly 6. Pulley
7. Pulley nut 8. Stator assembly 9. IC voltage regulator assembly
10. Diode assembly 11. Rear bracket assembly 12. Terminal set
Refer to GI-4, "
Components" for symbols in the figure.
JMMIA0364ZZ
Revision: 2010 May2011 QX56

CO-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006417198
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.
Revision: 2010 May2011 QX56

DAS-36
< ECU DIAGNOSIS INFORMATION >[ADAS CONTROL UNIT]
ADAS CONTROL UNIT
Fail-safe
INFOID:0000000006223477
If a malfunction occurs in each system, ADAS contro l unit cancels each control, sounds a beep, and turns ON
the warning lamp or indicator lamp.
Te r m i n a l N o .
(Wire color) Description
Condition Va l u e
(Approx.)
+ − Signal name Input/
Output
1
(V/W)
Ground Warning systems
switch
InputIgnition
switch ON When warning systems
switch is not pressed
12 V
When warning systems
switch is pressed 0 V
3
(R/Y) IBA OFF switch Input Ignition
switch
ON When IBA OFF switch is
not pressed
12 V
When IBA OFF switch is
pressed 0 V
4
(LG/B) Warning systems ON
indicator
OutputIgnition
switch ON Warning systems ON indi-
cator ON
0 V
Warning systems ON indi-
cator OFF 12 V
5
(R) ICC brake hold relay
drive signal
OutputIgnition
switch ON —12 V
At “STOP LAMP” test of
“Active test” 0 V
6
(B) Ground — Ignition
switch ON —0 V
7
(L) ITS communication-H — — — —
8
(Y) ITS communication-L — — — —
12
(G/R) Warning buzzer signal Output Ignition
switch ON Warning buzzer operation 0 V
Warning buzzer not oper-
ating
12 V
14
(L) CAN -H — — — —
15
(P) CAN -L — — — —
16
(W/G) Ignition power supply Input Ignition switch ON Battery Voltage
System Buzzer Warning lamp/Indicator lamp Description
Vehicle-to-vehicle distance control mode High-pitched
toneICC system warn
ing lamp Cancel
Conventional (fixed speed) cruise control mode High-pitched
tone
ICC system warn
ing lamp Cancel
Intelligent Brake Assist (IBA) High-pitched
toneIBA OFF indicator lamp Cancel
Forward Collision Warning (FCW) High-pitched
toneIBA OFF indicator lamp Cancel
Distance Control Assist (DCA) High-pitched
tone
ICC system warn
ing lamp Cancel
Lane Departure Warning (LDW) — Lane departure warning lamp Cancel
Revision: 2010 May2011 QX56