Ac system INFINITI FX35 2006 Service Manual

STARTING SYSTEM SC-19
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Revision: 2006 December 2006 FX35/FX45
VQ35DE ENGINE MODELS (AWD)
INSPECTION AFTER DISASSEMBLY
Pinion/Clutch Check
1. Inspect pinion teeth.

Replace pinion if teeth are worn or damaged. (Also check condition of ring gear teeth.)
2. Inspect reduction gear teeth.

Replace reduction gear if teeth are worn or damaged. (Also check condition of armature shaft gear
teeth.)
3. Check to see if pinion locks in one direction and rotates smoothly in the opposite direction.

If it locks or rotates in both directions, or unusual resistance is evident, replace.
1. Magnetic switch assembly 2. Dust cover kit 3. Shift lever set
4. Center bracket (A) 5. Yoke assembly 6. Armature assembly
7. Brush holder assembly 8. Thrust washer 9. Rear cover assembly
10. Shaft gear assembly 11. Packing 12. Thrust washer
13. Center bracket (P) 14. E-ring 15. Pinion assembly
16. Ball bearing 17. Caul 18. Gear case assembly
: N·m (kg-m, in-lb) (H): High-temperature grease point
PKIB8805E

SC-20
CHARGING SYSTEM
Revision: 2006 December 2006 FX35/FX45
CHARGING SYSTEMPFP:23100
System DescriptionNKS002UV
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 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 operate 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 illuminate charge warning lamp, if any of the following symp-
toms occur while alternator is operating:

Excessive voltage is produced.

No voltage is produced.

CHARGING SYSTEM SC-21
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Revision: 2006 December 2006 FX35/FX45
Wiring Diagram — CHARGE —NKS002UW
VK45DE ENGINE MODELS
TKWM4287E

SC-22
CHARGING SYSTEM
Revision: 2006 December 2006 FX35/FX45
VQ35DE ENGINE MODELS
TKWM4288E

CHARGING SYSTEM SC-23
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Revision: 2006 December 2006 FX35/FX45
Trouble Diagnosis with Starting/Charging System Tester (Charging)NKS002UX
For charging system testing, use Starting/Charging System Tester (J-44373). For details and operating
instructions, refer to Technical Service Bulletin.
SKIB0527E

SC-24
CHARGING SYSTEM
Revision: 2006 December 2006 FX35/FX45
PRELIMINARY INSPECTION
1. CHECK BATTERY TERMINALS CONNECTION
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 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-174, "
Checking Drive Belts" (VK45DE) or EM-15, "Checking
Drive Belts" (VQ35DE).
OK or NG
OK >> INSPECTION END
NG >> Repair as needed.
*1 SC-25, "Check “L” Terminal Circuit
(Open)"
*2SC-25, "Check “L” Terminal Circuit
(Short)"
*3SC-25, "Check “S” Terminal Circuit"
*4SC-26, "Check “B” Terminal Circuit"*5SC-28, "Alternator Pulley Inspec-
tion" (VK45DE)
SC-29, "
Alternator Pulley Inspec-
tion" (VQ35DE)
Unit Power source (Power supply terminals) Fuse No.
Alternator Battery (“S” terminal) 33
Combination meter Ignition switch ON (“L” terminal) 14

CHARGING SYSTEM SC-25
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Revision: 2006 December 2006 FX35/FX45
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 repair 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-23, "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
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-23, "
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.
3 – Ground : Charge warning lamp should light up.
SKIB8493E

SC-26
CHARGING SYSTEM
Revision: 2006 December 2006 FX35/FX45
2. CHECK ALTERNATOR “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-23, "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 ALTERNATOR “B” TERMINAL CIRCUIT
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 CONNECTION (VOLTAGE DROP TEST)
1. Start engine.
2. When engine running at idle and warm, check voltage between alternator “B” terminal E307 terminal 1 and battery positive ter-
minal.
OK or NG
OK >> Go to SC-23, "Trouble Diagnosis with Starting/Charging
System Tester (Charging)" .
NG >> Check harness between battery and alternator for poor continuity.
4 – Ground : Battery voltage
SKIB8494E
1 – Ground : Battery voltage
PKIB8809E
1 – Battery positive terminal : Less than 0.2 V
PKIB8810E

CHARGING SYSTEM SC-27
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Revision: 2006 December 2006 FX35/FX45
Removal and Installation NKS002UY
VK45DE ENGINE MODELS
Removal
1. Disconnect the battery cable from the negative terminal.
2. Remove engine front undercover, using power tools.
3. Remove radiator shroud (lower). Refer to CO-41, "
RADIATOR" .
4. Remove alternator, water pump and A/C compressor belt. Refer to EM-174, "
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.
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
PKIA2954E
PKIA2820E

SC-28
CHARGING SYSTEM
Revision: 2006 December 2006 FX35/FX45
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-174, "Checking Drive Belts" .
CAUTION:
Be sure to tighten “B” terminal nut carefully.
VQ35DE ENGINE MODELS
Removal
1. Disconnect the battery cable from the negative terminal.
2. Remove engine front undercover, using power tools.
3. Remove alternator and power steering oil pump belt. Refer to EM-16, "
Removal and Installation" .
4. Disconnect alternator connector.
5. Remove “B” terminal nut.
6. Remove harness clip and water hose bracket from alternator. Alternator pulley nut:
: 73.5 N·m (7.5 kg-m, 54 ft-lb)
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