2012 Infiniti FX35 Service & Repair Manual
What's Included?
Lifetime Access
Fast Download Speeds
Offline Viewing
Access Contents & Bookmarks
Full Search Facility
Print one or all pages of your manual
CHG
CHG-1
ELECTRICAL & POWER CONTROL
C
D
E
F
G
H
I
J
K
L
B
SECTION CHG
A
O
P
N
CONTENTS
CHARGING SYSTEM
BASIC INSPECTION ................................... 3
DIAGNOSIS AND REPAIR WORK FLOW ........ 3
Work Flow ................................................................ 3
SYSTEM DESCRIPTION ............................. 6
CHARGING SYSTEM ......................................... 6
System Diagram ....................................................... 6
System Description .................................................. 6
VQ35HR ...................................................................... 6
VQ35HR : Component Parts Location ..................... 6
VK50VE ...................................................................... 7
VK50VE : Component Parts Location ...................... 7
Component Description ........................................... 7
POWER GENERATION VOLTAGE VARI-
ABLE CONTROL SYSTEM ................................ 8
System Diagram ....................................................... 8
System Description .................................................. 8
VQ35HR ...................................................................... 8
VQ35HR : Component Parts Location ..................... 8
VK50VE ...................................................................... 8
VK50VE : Component Parts Location ...................... 9
Component Description ............................................ 9
DTC/CIRCUIT DIAGNOSIS ........................ 10
B TERMINAL CIRCUIT .....................................10
Description ............................................................. 10
Diagnosis Procedure .............................................. 10
L TERMINAL CIRCUIT (OPEN) ........................11
Description ............................................................. 11
Diagnosis Procedure .............................................. 11
L TERMINAL CIRCUIT (SHORT) ......................13
Description ............................................................. 13
Diagnosis Procedure .............................................. 13
S TERMINAL CIRCUIT ..................................... 14
Description ..............................................................14
Diagnosis Procedure ..............................................14
CHARGING SYSTEM ....................................... 15
Wiring Diagram - CHARGING SYSTEM - ..............15
SYMPTOM DIAGNOSIS ............................. 16
CHARGING SYSTEM ....................................... 16
Symptom Table ......................................................16
PRECAUTION ............................................. 17
PRECAUTIONS ................................................. 17
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ................................................................17
Precaution for Procedure without Cowl Top Cover ....17
Precautions For Xenon Headlamp Service ............17
Precaution for Power Generation Voltage Variable
Control System .......................................................18
PREPARATION .......................................... 19
PREPARATION ................................................. 19
Special Service Tools .............................................19
Commercial Service Tools ......................................19
PERIODIC MAINTENANCE ....................... 20
CHARGING SYSTEM PRELIMINARY IN-
SPECTION ........................................................ 20
Inspection Procedure ..............................................20
POWER GENERATION VOLTAGE VARI-
ABLE CONTROL SYSTEM OPERATION IN-
SPECTION ........................................................ 21
Inspection Procedure ..............................................21
REMOVAL AND INSTALLATION .............. 23
ALTERNATOR .................................................. 23
Revision: 2011 August 2012 FX35/FX50
CHG-2
VQ35HR ................................................................... 23
VQ35HR : Exploded View ..................................... 23
VQ35HR : Removal and Installation (2WD) ........... 24
VQ35HR : Removal and Installation (AWD) .......... 25
VQ35HR : Inspection ............................................. 26
VK50VE .................................................................... 26
VK50VE : Exploded View ...................................... 26
VK50VE : Removal and Installation ....................... 28
VK50VE : Inspection .............................................. 28
SERVICE DATA AND SPECIFICATIONS
(SDS) .......................................................... 30
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................ 30
Alternator ............................................................... 30
Revision: 2011 August 2012 FX35/FX50
CHG
DIAGNOSIS AND REPAIR WORK FLOW
CHG-3
< BASIC INSPECTION >
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow INFOID:0000000007519412
OVERALL SEQUENCE
DETAILED FLOW
JSMIA0009GB
Revision: 2011 August 2012 FX35/FX50
CHG-4
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORK FLOW
NOTE:
To ensure a complete and thorough diagnosis, the battery, starter and alternator test segments must be done
as a set from start to finish.
1.PRELIMINARY INSPECTION
Perform the preliminary inspection. Refer to CHG-20, " Inspection Procedure " .
>> GO TO 2.
2.STOP POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
Stop the operation of the power generation voltage variable control in either of the following procedures.
• After selecting “ENGINE” of “SELECT SYSTEM” using CONSULT, set the DUTY value of “ALTERNATOR
DUTY” to 0 % by selecting “ALTERNATOR DUTY” of “Active Test”. Continue “Active Test” until the end of
inspection. (When the DUTY value is 0 or 100 %, the normal power generation is performed according to the
characteristic of the IC voltage regulator of the alternator.)
• Turn the ignition switch OFF, and disconnect the battery current sensor connector. [However, DTC (P1550 -
P1554) of the engine might remain. After finishing the inspection, connect the battery current sensor connec-
tor and erase the self-diagnosis results history of the engine using CONSULT.]
>> GO TO 3.
3.DIAGNOSIS WITH STARTING/CHARGING SYSTEM TESTER
Perform the charging system test using Starting/Charging System Tester (SST: J-44373). For details and oper-
ating instructions, refer to Technical Service Bulletin.
Test result
CHARGING SYSTEM NORMAL>>Charging system is normal and will also show “DIODE RIPPLE” test
result.
NO CHARGING VOLTAGE>>GO TO 4.
LOW CHARGING VOLTAGE>>GO TO 12.
HIGH CHARGING VOLTAGE>>GO TO 14.
DIODE RIPPLE NORMAL>>Diode ripple is OK and will also show “CHARGING VOLTAGE” test result.
EXCESS RIPPLE DETECTED>>Replace the alternator. Perform “DIODE RIPPLE” test again using Starting/
Charging System Tester (SST: J-44373) to confirm repair.
DIODE RIPPLE NOT DETECTED>>GO TO 4.
4.INSPECTION WITH CHARGE WARNING LAMP (IGNITION SWITCH IS ON)
Turn the ignition switch ON.
Does the charge warning lamp illuminate?
YES >> GO TO 6.
NO >> GO TO 5.
5.“L” TERMINAL CIRCUIT (OPEN) INSPECTION
Check “L” terminal circuit (open). Refer to CHG-11, " Diagnosis Procedure " .
Is the “ L ” terminal circuit normal?
YES >> Replace alternator.
NO >> Repair as needed.
6.INSPECTION WITH CHARGE WARNING LAMP (IDLING)
Start the engine and run it at idle.
Does the charge warning lamp turn OFF?
YES >> GO TO 9.
NO >> GO TO 7.
7.“L” TERMINAL CIRCUIT (SHORT) INSPECTION
Check “L” terminal circuit (short). Refer to CHG-13, " Diagnosis Procedure " .
Is the “ L ” terminal circuit normal?
YES >> GO TO 8.
NO >> Repair as needed.
Revision: 2011 August 2012 FX35/FX50
CHG
DIAGNOSIS AND REPAIR WORK FLOW
CHG-5
< BASIC INSPECTION >
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
8.“S” TERMINAL CIRCUIT INSPECTION
Check “S” terminal circuit. Refer to CHG-14, " Diagnosis Procedure " .
Is the “ S ” terminal circuit normal?
YES >> GO TO 10.
NO >> Repair as needed.
9.INSPECTION WITH CHARGE WARNING LAMP (ENGINE AT 3,000 RPM)
Increase and maintain the engine speed at 3,000 rpm.
Does the charge warning lamp remain off?
YES >> GO TO 11.
NO >> GO TO 10.
10.INSPECTION OF ALTERNATOR PULLEY
Check alternator pulley. Refer to CHG-26, " VQ35HR : Inspection " (VQ35HR) or CHG-28, " VK50VE : Inspec-
tion " (VK50VE).
Is alternator pulley normal?
YES >> Replace alternator.
NO >> Repair as needed.
11.“B” TERMINAL CIRCUIT INSPECTION
Check “B” terminal circuit. Refer to CHG-10, " Diagnosis Procedure " .
Is “ B ” terminal circuit normal?
YES >> Replace alternator.
NO >> Repair as needed.
12.“B” TERMINAL CIRCUIT INSPECTION
Check “B” terminal circuit. Refer to CHG-10, " Diagnosis Procedure " .
Is “ B ” terminal circuit normal?
YES >> GO TO 13.
NO >> Repair as needed.
13.INSPECTION OF ALTERNATOR PULLEY
Check alternator pulley. Refer to CHG-26, " VQ35HR : Inspection " (VQ35HR) or CHG-28, " VK50VE : Inspec-
tion " (VK50VE).
Is alternator pulley normal?
YES >> Replace alternator.
NO >> Repair as needed.
14.“S” TERMINAL CIRCUIT INSPECTION
Check “S” terminal circuit. Refer to CHG-14, " Diagnosis Procedure " .
Is the “ S ” terminal circuit normal?
YES >> Replace alternator.
NO >> Repair as needed.
Revision: 2011 August 2012 FX35/FX50
CHG-6
< SYSTEM DESCRIPTION >
CHARGING SYSTEM
SYSTEM DESCRIPTION
CHARGING SYSTEM
System Diagram INFOID:0000000007519413
System Description INFOID:0000000007519414
The alternator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged.
The voltage output is controlled by the IC voltage regulator.
VQ35HR
VQ35HR : Component Parts Location INFOID:0000000007519415
JPMIA0426GB
1. Alternator 2. Charge warning lamp
A. Cylinder block (bank 1) side B. Combination meter
JSMIA0054ZZ
Revision: 2011 August 2012 FX35/FX50
CHG
CHARGING SYSTEM
CHG-7
< SYSTEM DESCRIPTION >
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
VK50VE
VK50VE : Component Parts Location INFOID:0000000007519416
Component Description INFOID:0000000007519417
1. Alternator 2. Charge warning lamp
A. Cylinder block (bank 1) side B. Combination meter
JSMIA0070ZZ
Component part Description
Alternator
The alternator provides DC voltage to operate the vehicle electri-
cal system and to keep the battery charged.
Combination meter (Charge warning lamp)
The IC voltage regulator warning function activates to illuminate
the charge warning lamp, if any of the following symptoms occur
while alternator is operating:
• Excessive voltage is produced.
• No voltage is produced.
Revision: 2011 August 2012 FX35/FX50
CHG-8
< SYSTEM DESCRIPTION >
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
System Diagram INFOID:0000000007519418
System Description INFOID:0000000007519419
By performing the power generation voltage variable control, the engine load due to the power generation of
the alternator is reduced and fuel consumption is decreased.
NOTE:
When any malfunction is detected in the power generation voltage variable control system, the power genera-
tion is performed according to the characteristic of the IC voltage regulator of the alternator.
VQ35HR
VQ35HR : Component Parts Location INFOID:0000000007519420
VK50VE
JPMIA0632GB
1. IPDM E/R 2. Battery current sensor 3. ECM
4. Alternator
A. Engine room dash panel (RH) B. Behind glove box C. Cylinder block (bank 1) side
JSMIA0069ZZ
Revision: 2011 August 2012 FX35/FX50
CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
CHG-9
< SYSTEM DESCRIPTION >
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
VK50VE : Component Parts Location INFOID:0000000007519421
Component Description INFOID:0000000007519422
1. IPDM E/R 2. Battery current sensor 3. ECM
4. Alternator
A. Engine room dash panel (RH) B. Behind glove box C. Cylinder block (bank 1) side
JSMIA0068ZZ
Component part Description
Battery current sensor
Battery current sensor is installed to the battery cable at the neg-
ative terminal, and it detects the charging/discharging current of
the battery and sends the voltage signal to ECM according to the
current value.
ECM
Battery current sensor detects the charging/discharging current of
the battery. ECM judges the battery condition based on this signal.
ECM judges whether to perform the power generation voltage
variable control according to the battery condition.
When performing the power generation voltage variable control,
ECM calculates the target power generation voltage according to
the battery condition and sends the calculated value as the power
generation command value to IPDM E/R.
IPDM E/R
IPDM E/R converts the received power generation command val-
ue into the power generation command signal (PWM signal) and
sends it to the IC voltage regulator.
Alternator (IC voltage regulator)
IC voltage regulator controls the power generation voltage by the
target power generation voltage based on the received power gen-
eration command signal.
When there is no power generation command signal, the alterna-
tor performs the normal power generation according to the char-
acteristic of the IC voltage regulator.
Revision: 2011 August 2012 FX35/FX50
CHG-10
< DTC/CIRCUIT DIAGNOSIS >
B TERMINAL CIRCUIT
DTC/CIRCUIT DIAGNOSIS
B TERMINAL CIRCUIT
Description INFOID:0000000007519423
“B” terminal circuit supplies power to charge the battery and to operate the vehicle’s electrical system.
Diagnosis Procedure INFOID:0000000007519424
1.CHECK “B” TERMINAL CONNECTION
1. Turn ignition switch OFF.
2. Check if “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 CONNECTION (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-3, " Work Flow " .
NO >> Check harness between battery and alternator for poor continuity.
Terminals
Voltage (Approx.) (+)
(–)
Alternator “B” terminal Terminal
E203 1 Ground Battery voltage
Terminals
Voltage (Approx.)
(+)
(–)
Alternator “B” terminal Terminal
Battery positive terminal E203 1 Less than 0.2 V
Revision: 2011 August 2012 FX35/FX50
You're Reading a Preview
What's Included?
Lifetime Access
Fast Download Speeds
Offline Viewing
Access Contents & Bookmarks
Full Search Facility
Print one or all pages of your manual
$36.99
Viewed 49 Times Today
Secure transaction
What's Included?
Lifetime Access
Fast Download Speeds
Offline Viewing
Access Contents & Bookmarks
Full Search Facility
Print one or all pages of your manual
$36.99
If you are in need of a repair manual for your 2012 Infiniti FX35, look no further. This accessible repair manual is perfect for both professional mechanics and DIY enthusiasts. In the past, traditional service manuals in book format were costly and inconvenient. Now, you can access the same information in a more affordable and convenient digital format.
Whether you need to fix the brakes, replace suspension components, address engine issues, or perform standard maintenance, this repair manual has you covered. It contains comprehensive service information for the brakes, engine, suspension, steering, drivetrain, electrical systems, heating, air conditioning, and more.
By utilizing this repair manual, you can save a significant amount of money on vehicle maintenance. Mechanics often charge high fees for their services, making DIY repairs a cost-effective alternative. This 2012 Infiniti FX35 repair manual is compatible with Windows, Mac computers, smartphones, and tablets, ensuring ease of use for all users.
