2007 INFINITI M35 alternator belt

MA-22
ENGINE MAINTENANCE (VK45DE ENGINE)
Revision: 2007 April2007 M35/M45
ENGINE MAINTENANCE (VK45DE ENGINE)PFP:10001
Checking Drive BeltsNLS0007Q
WARNING:
Be sure to perform when the engine is stopped.

Remove air duct (inlet) when inspecting drive belt for alternator, water pump and A/C compressor.

Remove front engine undercover with power tool when inspecting power steering oil pump belt.

Make sure that indicator (single line notch) of each auto tensioner is within the allowable working range
(between three line notches).
NOTE:

Check auto tensioner indication when engine is cold.

When new drive belt is installed, the range should be “A”.

The indicator notch is located on the moving side of the tensioner for alternator, water pump and A/C
compressor belt, while it is found on the fixed side for power steering oil pump belt.

Visually check entire belt for wear, damage or cracks.

If the indicator is out of allowable working range or belt is damaged, replace belt.
Tension AdjustmentNLS0007R
Belt tensioning is not necessary, as it is automatically adjusted by auto tensioner.
Changing Engine CoolantNLS0007S
WARNING:

To avoid being scalded, do not change engine coolant when engine is hot.

Wrap a thick cloth around radiator cap and carefully remove radiator cap. First, turn radiator cap a
quarter of a turn to release built-up pressure. Then turn radiator cap all the way.

Be careful not to allow engine coolant to contact drive belts.
DRAINING ENGINE COOLANT
1. Remove engine room cover (RH and LH) Refer to EM-173, "ENGINE ROOM COVER" .
2. Remove engine cover with power tool. Refer to EM-179, "
INTAKE MANIFOLD" .
3. Open radiator drain plug at the bottom of radiator, and then remove radiator cap.
PBIC3822E

MA-40
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: 2007 April2007 M35/M45
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Standard and LimitNLS0008J
BELT DEFLECTION AND TENSION (VQ35DE)
*: If belt tension gauge cannot be installed at check points shown, check drive belt tension at different location on the belt.
BELT DEFLECTION AND TENSION (VK45DE)
ENGINE COOLANT CAPACITY (APPROXIMATE) (VQ35DE)
Unit: (US qt, lmp qt)
ENGINE COOLANT CAPACITY (APPROXIMATE) (VK45DE)
Unit: (US qt, lmp qt)
RADIATOR
Unit: kPa (kg/cm2 , psi)
ENGINE OIL CAPACITY (APPROXIMATE) (VQ35DE)
Unit: (US qt, lmp qt) Deflection adjustment Unit: mm (in) Tension adjustment* Unit: N (kg, lb)
Used belt
New beltUsed belt
New belt
Limit After adjustment Limit After adjustment
Alternator and
power steering
oil pump belt7 (0.28)4 - 5
(0.16 - 0.20)3.5 - 4.5
(0.138 - 0.177)294 (30, 66)730 - 818
(74.5 - 83.5,
164 - 184)838 - 926
(85.5 - 94.5,
188 - 208)
A/C compressor
belt12 (0.47)9 - 10
(0.35 - 0.39)8 - 9
(0.31 - 0.35)196 (20, 44)348 - 436
(35.5 - 44.5,
78 - 98)470 - 559
(48 - 57,
106 - 126)
Applied pushing
force98 N (10 kg, 22 lb) —
KBIA1731J
Tension of drive belts Auto-adjustment by auto tensioner
Engine coolant capacity (With reservoir tank at “MAX” level) 8.9 (9-3/8, 7-7/8)
Reservoir tank engine coolant capacity (At “MAX” level) 0.8 (7/8, 3/4)
Engine coolant capacity (With reservoir tank at “MAX” level) 10.4 (11, 9-1/8)
Reservoir tank engine coolant capacity (At “MAX” level) 0.8 (7/8, 3/4)
Cap relief pressureStandard 78 - 98 (0.8 - 1.0, 11 - 14)
Limit 59 (0.6, 9)
Leakage testing pressure157 (1.6, 23)
Drain and refill With oil filter change 4.7 (5, 4-1/8)
Without oil filter change 4.4 (4-5/8, 3-7/8)
Dry engine (Overhaul) 5.4 (5-3/4, 4-3/4)

SC-1
STARTING & CHARGING SYSTEM
K ELECTRICAL
CONTENTS
C
D
E
F
G
H
I
J
L
M
SECTION SC
A
B
SC
Revision: 2007 April2007 M35/M45
STARTING & CHARGING SYSTEM
PRECAUTIONS .......................................................... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 2
Precautions for Power Generation Voltage Variable
Control System ......................................................... 2
PREPARATION ........................................................... 3
Special Service Tools ............................................... 3
Commercial Service Tools ........................................ 3
BATTERY .................................................................... 4
How to Handle Battery ............................................. 4
METHODS OF PREVENTING OVER-DIS-
CHARGE ............................................................... 4
CHECKING ELECTROLYTE LEVEL .................... 5
SPECIFIC GRAVITY CHECK ............................... 5
CHARGING THE BATTERY ................................. 6
Trouble Diagnosis with Battery Service Center ........ 7
Removal and Installation .......................................... 7
REMOVAL ............................................................. 7
INSTALLATION ..................................................... 7
STARTING SYSTEM .................................................. 8
System Description .................................................. 8
Wiring Diagram — START — ................................... 9
VQ35DE ENGINE MODELS ................................. 9
VK45DE ENGINE MODELS ............................... 10
Trouble Diagnosis with Starting/Charging System
Tester (Starting) ....................................................... 11
DIAGNOSTIC PROCEDURE 1 ........................... 12
DIAGNOSTIC PROCEDURE 2 ........................... 13
MINIMUM SPECIFICATION OF CRANKING
VOLTAGE REFERENCING COOLANT TEM-
PERATURE ......................................................... 13
Removal and Installation ........................................ 14
VQ35DE ENGINE MODELS (2WD) .................... 14
VQ35DE ENGINE MODELS (AWD) ................... 15
VK45DE ENGINE MODELS ............................... 16Disassembly and Assembly .................................... 17
VQ35DE ENGINE MODELS (2WD) .................... 17
VQ35DE ENGINE MODELS (AWD) .................... 18
VK45DE ENGINE MODELS ................................ 19
Inspection After Disassembly ................................. 19
PINION/CLUTCH CHECK ................................... 19
CHARGING SYSTEM ............................................... 20
System Description ................................................. 20
DESCRIPTION .................................................... 20
MALFUNCTION INDICATOR .............................. 20
POWER GENERATION VOLTAGE VARIABLE
CONTROL SYSTEM ........................................... 21
Wiring Diagram — CHARGE — ............................. 22
VQ35DE ENGINE MODELS (2WD) .................... 22
VQ35DE ENGINE MODELS (AWD) .................... 23
VK45DE ENGINE MODELS ................................ 24
Trouble Diagnosis with Starting/Charging System
Tester (Charging) .................................................... 25
PRELIMINARY INSPECTION ............................. 26
DIAGNOSTIC PROCEDURE 1 ........................... 26
DIAGNOSTIC PROCEDURE 2 ........................... 27
DIAGNOSTIC PROCEDURE 3 ........................... 27
DIAGNOSTIC PROCEDURE 4 ........................... 28
Power Generation Voltage Variable Control System
Operation Inspection .............................................. 29
Removal and Installation ........................................ 31
VQ35DE ENGINE MODELS ............................... 31
VK45DE ENGINE MODELS ................................ 33
Disassembly and Assembly .................................... 35
VQ35DE ENGINE MODELS ............................... 35
VK45DE ENGINE MODELS ................................ 36
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 37
Battery .................................................................... 37
Starter ..................................................................... 37
Alternator ................................................................ 37

SC-26
CHARGING SYSTEM
Revision: 2007 April2007 M35/M45
PRELIMINARY INSPECTION
1. CHECK BATTERY TERMINALS CONNECTION
Check if battery terminals is clean and tight.
OK or NG
OK >> GO TO 2.
NG >> Repair battery terminals connection.
2. CHECK FUSE AND FUSIBLE LINK
Check for blown fuse and fusible link.
OK or NG
OK >> GO TO 3.
NG >> If fuse is blown, be sure to 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 the following.

VQ35DE: EM-17, "Removal and Installation"

VK45DE: EM-174, "Removal and Installation"
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 repair by performing complete Starting/Charging system
test. Refer to Technical Service Bulletin.
*1SC-26, "Check “L” Terminal Circuit
(Open)"
*2SC-27, "Check “L” Terminal Circuit
(Short)"
*3SC-27, "Check “S” Terminal Circuit"
*4SC-28, "Check “B” Terminal Circuit"*5SC-32, "Alternator Pulley Inspec-
tion" (VQ35DE)
SC-34, "
Alternator Pulley Inspec-
tion" (VK45DE)
Unit Power source (Power supply terminals) Fuse and fusible link No.
Alternator Battery (“S” terminal) 36
Combination meter Ignition switch ON (“L” terminal) 14

CHARGING SYSTEM
SC-31
C
D
E
F
G
H
I
J
L
MA
B
SC
Revision: 2007 April2007 M35/M45
Removal and Installation NKS005C0
VQ35DE ENGINE MODELS
Removal (2WD Models)
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, "
DRIVE BELTS" .
4. Disconnect alternator connector (1).
5. Remove “B” terminal nut (2).
6. Remove the harness bracket bolts (A).
7. Remove oil pressure switch harness clip (A) from alternator stay.
8. Disconnect oil pressure switch connector (1).
9. Remove alternator mounting bolt (B) and alternator stay mount-
ing bolt (C) using power tools, then remove alternator stay (2).
10. Remove alternator mounting bolt (D), using power tools.
11. Remove alternator assembly downward from the vehicle.
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
SKIB2605J
PKIB8817E

SC-32
CHARGING SYSTEM
Revision: 2007 April2007 M35/M45
Removal (AWD Models)
1. Disconnect the battery cable from the negative terminal.
2. Remove power steering oil reservoir tank from the bracket.
3. Remove the clips (A) and the hose clamp (B) from the harness
bracket (1).
4. Remove engine front undercover, using power tools.
5. Remove alternator and power steering oil pump belt. Refer to
EM-16, "
DRIVE BELTS" .
6. Remove alternator mounting bolt (A) and alternator stay mount-
ing bolt (B) using power tools, then remove alternator stay (1).
7. Remove alternator mounting bolt (C), using power tools.
8. Pull and turn alternator, and then remove the harness bracket
bolts (A).
9. Disconnect alternator connector (1).
10. Remove “B” terminal nut (2).
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.
CAUTION:
Be sure to tighten “B” terminal nut carefully.

Install alternator, and check tension of belt. Refer to EM-16, "Checking Drive Belts" .

For this model, the power generation voltage variable control system that controls the power generation
voltage of the alternator has been adopted. Therefore, the power generation voltage variable control sys-
tem operation inspection should be performed after replacing the alternator, and then make sure that the
system operates normally. Refer to SC-29, "
Power Generation Voltage Variable Control System Operation
Inspection" .
PKIB8818E
PKIB8819E
SKIB2608J
Alternator pulley nut:
: 118 N·m (12.0 kg-m, 87 ft-lb)

CHARGING SYSTEM
SC-33
C
D
E
F
G
H
I
J
L
MA
B
SC
Revision: 2007 April2007 M35/M45
VK45DE ENGINE MODELS
Removal
1. Disconnect the battery cable from the negative terminal.
2. Remove engine front undercover, using power tools.
3. Remove “B” terminal nut (1).
4. Disconnect alternator connector (2).
5. Remove alternator ground harness mounting bolt (3).
6. Remove the harness bracket bolts (A).
7. Remove air intake duct. Refer to EM-177, "
AIR CLEANER AND AIR DUCT" .
8. Remove alternator, water pump and A/C compressor belt. Refer to EM-174, "
DRIVE BELTS" .
9. Remove power steering oil reservoir tank (1) from the bracket,
engine coolant reservoir tank (2) and vacuum tank (3).
10. Remove the harness clips (A).
11. Remove alternator mounting bolts (B), using power tools.
12. Remove alternator assembly upward.
1. Alternator ground harness 2. “B” terminal nut 3. “B” terminal harness
4. Alternator nut 5. Alternator bracket 6. Alternator
7. Alternator mounting bolt 8. Alternator stay
: N·m (kg-m, in-lb) : N·m (kg-m, ft-lb) : Engine front
PKIB8812E
PKIB8813E
PKIB8814E

SC-34
CHARGING SYSTEM
Revision: 2007 April2007 M35/M45
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.
CAUTION:
Be sure to tighten “B” terminal nut carefully.

Install alternator, and check tension of belt. Refer to EM-174, "Checking Drive Belts" .

For this model, the power generation voltage variable control system that controls the power generation
voltage of the alternator has been adopted. Therefore, the power generation voltage variable control sys-
tem operation inspection should be performed after replacing the alternator, and then make sure that the
system operates normally. Refer to SC-29, "
Power Generation Voltage Variable Control System Operation
Inspection" . Alternator pulley nut:
: 118 N·m (12.0 kg-m, 87 ft-lb)