alternator INFINITI FX35 2008 Owner's Manual

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ELECTRICAL
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CONTENTS
STARTING & CHARGING SYSTEM
SERVICE INFORMATION .. ..........................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
PREPARATION ...................................................3
Special Service Tools .......................................... ......3
Commercial Service Tools ........................................3
BATTERY ............................................................4
How to Handle Battery ........................................ ......4
Trouble Diagnosis with Battery Service Center .........6
Removal and Installation ...........................................6
STARTING SYSTEM ...........................................8
System Description ............................................. ......8
Wiring Diagram - START - ........................................9
Trouble Diagnosis with Starting/Charging System
Tester (Starting) ......................................................
10
Removal and Installation (VK45DE Engine Mod-
els) ..........................................................................
13
Removal and Installation [VQ35DE Engine Mod-
els (2WD)] ............................................................ ....
14
Removal and Installation [VQ35DE Engine Mod-
els (AWD)] ...............................................................
15
Disassembly and Assembly .....................................15
Inspection After Disassembly ..................................18
CHARGING SYSTEM .......................................19
System Description ..................................................19
Wiring Diagram - CHARGE - ...................................20
Trouble Diagnosis with Starting/Charging System
Tester (Charging) ....................................................
21
Removal and Installation (VK45DE Engine Mod-
els) ...........................................................................
25
Removal and Installation (VQ35DE Engine Mod-
els) ...........................................................................
27
Disassembly and Assembly .....................................28
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
30
Battery .....................................................................30
Starter ......................................................................30
Alternator .................................................................30
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CHARGING SYSTEM
System DescriptionINFOID:0000000001328254
The alternator provides DC voltage to operate the vehi cle's electrical system and to keep the battery charged.
The voltage output is controlled by the IC regulator.
Power is supplied at all times
 through 10A fuse (No. 33, located in the fuse and fusible link block)
 to alternator terminal 4 (“S” terminal).
“B” Terminal supplies power to charge the battery and oper ate the vehicle's electrical system. Output voltage
is controlled by the IC regulator at terminal 4 (“S” terminal) detecting the input voltage.
The charging circuit is protected by the 120A fusible link (VK45DE and VQ35DE AWD).
The alternator is grounded to the engine block.
With the ignition switch in the ON or START position, power is supplied
 through 10A fuse [No. 14, located in the fuse block (J/B)]
 to combination meter terminal 7 for the charge warning lamp.
Ground is supplied
 to combination meter terminal 2
 through alternator terminal 3 (“L” terminal)
 to alternator terminal 2 (“E” terminal) (VK45DE) or through case ground (VQ35DE)
 through ground E304 (VK45DE).
With power and ground supplied, the charge warning lamp will illuminate. When the alternator is providing suf-
ficient voltage with the engine running, the ground is opened and the charge warning lamp will go off.
If the charge warning lamp illuminates with the engine running, a malfunction is indicated.
MALFUNCTION INDICATOR
The IC regulator warning function activates to illumi nate charge warning lamp, if any of the following symp-
toms occur while alternator is operating:
 Excessive voltage is produced.
 No voltage is produced.
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Check if battery terminals are clean and tight.
OK or NG
OK >> GO TO 2.
NG >> Repair battery terminals connection.
2.CHECK FUSE AND FUSIBLE LINK
Check for blown alternator and combination meter fuses.
OK or NG
OK >> GO TO 3.
NG >> If fuse is blown, be sure eliminate cause of malfunction before installing new fuse.
3.CHECK “E” TERMINAL CONNECTION
Check if “E” terminal (alternator ground harness) is clean and tight.
OK or NG
OK >> GO TO 4.
NG >> Repair “E” terminal connection.
4.CHECK ALTERNATOR DRIVE BELT TENSION
Check alternator drive belt tension. Refer to EM-170, "
Checking Drive Belts" (VK45DE) or EM-14, "Checking
Drive Belts" (VQ35DE).
OK or NG
OK >> INSPECTION END
NG >> Repair as needed.
DIAGNOSTIC PROCEDURE 1
Check “L” Terminal Circuit (Open)
1.CHECK “L” TERMINAL CONNECTION
1. Turn ignition switch OFF.
2. Check if “L” terminal is clean and tight.
OK or NG
OK >> GO TO 2.
NG >> Repair “L” terminal connection. Confirm repa ir by performing complete Starting/Charging system
test. Refer to Technical Service Bulletin.
2.CHECK “L” TERMINAL CIRCUIT (OPEN)
1. Disconnect alternator connector.
2. Apply ground to alternator harness connector E311 (VK45DE) or F26 (VQ35DE) terminal 3 with the ignition switch in the ON posi-
tion.
OK or NG
OK >> Go to SC-21, "Trouble Diagnosis with Starting/Charging
System Tester (Charging)".
NG >> Check the following.  Charge warning lamp (Combination meter)
 Harness for open between combination meter and
fuse
 Harness for open between combination meter and alternator
DIAGNOSTIC PROCEDURE 2
Unit Power source (Power supply terminals) Fuse No.
Alternator Battery (“S” terminal) 33
Combination meter Ignition switch ON (“L” terminal) 14
3 – Ground : Charge warning lamp should light up.
SKIB8493E
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CHARGING SYSTEM
Check “L” Terminal Circuit (Short)
1.CHECK “L” TERMINAL CIRCUIT (SHORT)
1. Turn ignition switch OFF.
2. Disconnect alternator connector.
3. Turn ignition switch ON.
Charge warning lamp should light up?
YES >> Check the following.  Harness for short between combination meter and alternator
 Charge warning lamp (Combination meter)
NO >> Go to SC-21, "
Trouble Diagnosis with Starting/Charging System Tester (Charging)".
DIAGNOSTIC PROCEDURE 3
Check “S” Terminal Circuit
1.CHECK “S” TERMINAL CONNECTION
1. Turn ignition switch OFF.
2. Check if “S” terminal is clean and tight.
OK or NG
OK >> GO TO 2.
NG >> Repair “S” terminal connection. Confirm repair by performing complete Starting/Charging system
test. Refer to Technical Service Bulletin.
2.CHECK “S” TERMINAL CIRCUIT
1. Disconnect alternator connector.
2. Check voltage between alternator harness connector E311 (VK45DE) or F26 (VQ35DE) terminal 4 and ground.
OK or NG
OK >> Go to SC-21, "Trouble Diagnosis with Starting/Charging
System Tester (Charging)".
NG >> Harness for open between alternator and fuse.
DIAGNOSTIC PROCEDURE 4
Check “B” Terminal Circuit
1.CHECK “B” TERMINAL CONNECTION
1. Turn ignition switch OFF.
2. Check if “B” terminal is clean and tight.
OK or NG
OK >> GO TO 2.
NG >> Repair “B” terminal connection. Confirm repair by performing complete Starting/Charging system
test. Refer to Technical Service Bulletin.
2.CHECK “B” TERMINAL CIRCUIT 4 – Ground : Battery voltage
SKIB8494E
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Check voltage between alternator “B” terminal E307 terminal 1 and
ground.
OK or NG
OK >> GO TO 3.
NG >> Check the following.  Harness for open between alternator and fusible link
(VK45DE and VQ35DE AWD)
 Harness for open between alternator and battery
(VQ35DE 2WD)
3.CHECK “B” TERMINAL CONNECT ION (VOLTAGE DROP TEST)
1. Start engine, then engine running at idle and warm.
2. Check voltage between alternator “B” terminal E307 terminal 1 and battery positive terminal.
OK or NG
OK >> Go to SC-21, "Trouble Diagnosis with Starting/Charging
System Tester (Charging)".
NG >> Check harness between battery and alternator for poor continuity.
Removal and Installation (VK45DE Engine Models)INFOID:0000000001328257
REMOVAL
1. Disconnect the battery cabl e from the negative terminal.
2. Remove engine front undercover, using power tools.
3. Remove radiator shroud (lower). Refer to CO-40, "
Removal and Installation".
1 – Ground : Battery voltage
PKIB8809E
1 – Battery positive terminal : Less than 0.2 V
PKIB8810E
1. Alternator ground harness mounting bolt 2. B terminal nut 3. B terminal harness
4. Alternator Nut 5. Alternator bracket 6. Alternator connector
7. Alternator 8. Alternator mounting bolt 9. Alternator stay
10. Alternator mounting bolt 11. Alternator stay mounting bolt 12. Alternator ground harness
: N·m (kg-m, in-lb) : N·m (kg-m, ft-lb) : Engine front
SKIB7209E
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CHARGING SYSTEM
4. Remove alternator, water pump and A/C compressor belt. Refer to EM-170, "Removal and Installation".
5. Remove alternator mounting bolts, using power tools.
6. Disconnect alternator connector.
7. Remove “B” terminal nut.
8. Remove alternator ground harness mounting bolt.
9. Remove alternator assembly downward from the vehicle.
ALTERNATOR PULLEY INSPECTION
Perform the following.
 Make sure that alternator pulley does not rattle.
 Make sure that alternator pulley nut is tight.
INSTALLATION
Installation is the reverse order of removal. Install alternator, and check tension of belt. Refer to EM-170, "Checking Drive Belts".
CAUTION:
Be sure to tighten “B” terminal nut carefully.
PKIA2954E
PKIA2820E
Alternator pulley nut:
: 73.5 N·m (7.5 kg-m, 54 ft-lb)
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Removal and Installation (VQ35DE Engine Models)INFOID:0000000001328258
REMOVAL
1. Disconnect the battery cabl e from the negative terminal.
2. Remove engine front undercover, using power tools.
3. Remove alternator and power steering oil pump belt. Refer to EM-15, "
Removal and Installation".
4. Disconnect alternator connector.
5. Remove “B” terminal nut.
6. Remove harness clip and water hose bracket from alternator.
7. Remove oil pressure switch harness clip from alternator stay. (2WD)
8. Disconnect oil pressure switch connector. (2WD)
9. Remove alternator stay mounting bolts and alternator stay, using power tools.
10. Remove alternator mounting bolt, using power tools.
11. Remove alternator assembly downward from the vehicle.
ALTERNATOR PULLEY INSPECTION
Perform the following.
 Make sure that alternator pulley does not rattle.
1. B terminal nut 2. B terminal harness 3. Alternator connector
4. Alternator mounting bolt 5. Alternator stay mounting bolt 6. Alternator stay
7. Alternator
: N·m (kg-m, ft-lb) : Engine front
PKIB8815E
PKIA2358E
PKIA1923E
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CHARGING SYSTEM
 Make sure that alternator pulley nut is tight.
INSTALLATION
Installation is the reverse order of removal.
 Install alternator, and check tension of belt. Refer to EM-14, "Checking Drive Belts".
CAUTION:
Be sure to tighten “B” terminal nut carefully.
Disassembly and AssemblyINFOID:0000000001328259
VK45DE ENGINE MODELS (LR1110-716B)
VQ35DE ENGINE MODELS (A3TG0191)
Alternator pulley nut:
: 118 N·m (12.0 kg-m, 87 ft-lb)
1. Stator assembly 2. Slip ring 3. Rotor assembly
4. Retainer 5. Front bearing 6. Front bracket assembly
7. Pulley 8. Pulley nut 9. Fun guide
10. Double labyrinth seal 11. IC voltage regulator assembly 12. Diode assembly
13. Rear bracket assembly 14. Bush 15. B terminal nut
16. Through-bolt and nut
PKID0691E
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
BatteryINFOID:0000000001328260
StarterINFOID:0000000001328261
AlternatorINFOID:0000000001328262
Typ e11 0 D 2 6 L
Capacity V - AH 12 - 75
Cold cranking current (F or reference value) A 720
Applied model VK45DE VQ3 5DE (2WD) VQ35DE (AWD)
Ty p e M002T85075 S114-880A S114-881A
MITSUBISHI make HITACHI make Reduction gear type
System voltage V 12
No-load Te r m i n a l v o l t a g e V 11
Current A Less than 145 Less than 90
Revolution rpm More than 3,300 More than 2,880
Minimum diameter of commutator mm (in) 31.4 (1.236) 28.0 (1.102)
Minimum length of brush mm (in) 11.0 (0.433) 10.5 (0.413)
Brush spring tension N (kg, lb) 26.7 - 36.1
(2.72 - 3.68,
6.80 - 8.12) 16.2 (1.65, 3.6)
Clearance between bearing metal and armature shaft mm (in) Less than 0.2 (0.008)
Clearance between pinion front edge and pinion stopper mm (in) 0.5 - 2.0
(0.020 - 0.079) —
Movement in height of pinion assembly mm (in) — 0.3 - 2.5 (0.012 - 0.098)
Applied model VK45DE VQ35DE
Ty p e LR1110 - 716B A3TG0191
HITACHI make MITSUBISHI make
Nominal rating V - A 12 - 110
Ground polarity Negative
Minimum revolution under no-load (When 13.5 V is applied) rpm Less than 1,100 Less than 1,000
Hot output current (When 13.5 V is applied) A/rpm More than 70/1,800
More than 91/2,500
More than 110/5,000 More than 37/1,300
More than 92/2,500
More than 103/5,000
Regulated output voltage V 14.1 - 14.7
Minimum length of brush mm (in) More than 6.00 (0.236) More than 5.00 (0.197)
Brush spring pressure N (g, oz) 1.00 - 3.43
(102 - 350, 3.60 - 12.34) 4.8 - 6.0
(490 - 612, 17.28 - 21.60)
Slip ring minimum outer diameter mm (in) More than 26.0 (1.024) More than 22.1 (0.870)
Rotor (Field coil) resistance Ω2.31 1.7 - 2.1
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