2005 INFINITI FX35 alternator

SC-28
CHARGING SYSTEM
Revision: 2005 July 2005 FX
WORK FLOW
*1SC-30, "Check “L” Terminal Circuit
(Open)"
*2SC-31, "Check “L” Terminal Circuit
(Short)"
*3SC-31, "Check “S” Terminal Circuit"
*4SC-32, "Check “B” Terminal Circuit"*5SC-34, "Alternator Pulley Inspec-
tion" (VK45DE)
SC-35, "
Alternator Pulley Inspec-
tion" (VQ35DE)
SKIB0527E

CHARGING SYSTEM SC-29
C
D E
F
G H
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L
M A
B
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Revision: 2005 July 2005 FX
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-173, "
Checking Drive Belts" (VK45DE) or EM-15, "Checking
Drive Belts" (VQ35DE).
OK or NG
OK >> INSPECTION END
NG >> Repair as needed.
Unit Power source (Power supply terminals) Fuse No.
Alternator Battery (“S” terminal) 33
Combination meter Ignition switch ON (“L” terminal) 14

SC-30
CHARGING SYSTEM
Revision: 2005 July 2005 FX
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 Battery/Starting/Charging system test.
2. CHECK “L” TERMINAL CIRCUIT (OPEN)
1. Disconnect alternator connector.
2. Apply ground to alternator harness connector E311 (VK45DE) or F26 (VQ35DE) terminal 3 (OR) with the ignition switch in the ON
position.
OK or NG
OK >> Go to SC-28, "WORK FLOW" .
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
3 (OR) – Ground : Charge warning lamp should
light up.
SKIB0599E

CHARGING SYSTEM SC-31
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D E
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L
M A
B
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Revision: 2005 July 2005 FX
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-28, "
WORK FLOW" .
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 Battery/Starting/Charging
system test.
2. CHECK ALTERNATOR “S” TERMINAL CIRCUIT
1. Disconnect alternator connector.
2. Check voltage between alternator harness connector E311 (VK45DE) or F26 (VQ35DE) terminal 4 (LG) and ground.
OK or NG
OK >> Go to SC-28, "WORK FLOW" .
NG >> Harness for open between alternator and fuse. 4 (LG) – Ground : Battery voltage
SKIB0532E

SC-32
CHARGING SYSTEM
Revision: 2005 July 2005 FX
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 Battery/Starting/Charging system test.
2. CHECK ALTERNATOR “B” TERMINAL CIRCUIT
Check voltage between alternator “B” terminal E307 terminal 1 (B/R)
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 (B/R) and battery positive
terminal.
OK or NG
OK >> Go to SC-28, "WORK FLOW" .
NG >> Check harness between battery and alternator for poor continuity.
1 (B/R) – Ground : Battery voltage
PKIA2944E
1 (B/R) – Battery positive terminal : Less than 0.2 V
PKIA2366E

CHARGING SYSTEM SC-33
C
D E
F
G H
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J
L
M A
B
SC
Revision: 2005 July 2005 FX
Removal and Installation AKS00AV7
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-173, "
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-34
CHARGING SYSTEM
Revision: 2005 July 2005 FX
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-173, "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

CHARGING SYSTEM SC-35
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G H
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M A
B
SC
Revision: 2005 July 2005 FX
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.

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-15, "Checking Drive Belts" .
CAUTION:
Be sure to tighten “B” terminal nut carefully.
PKIA1923E
Alternator pulley nut:
: 118 N·m (12.0 kg-m, 87 ft-lb)