2007 INFINITI M35 ECU

ENGINE MAINTENANCE (VK45DE ENGINE)
MA-25
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Revision: 2007 April2007 M35/M45
4. Run engine and warm it up to normal operating temperature.
5. Rev engine two or three times under no-load.
6. Stop engine and wait until it cools down.
7. Drain water from the system. Refer to CO-40, "
DRAINING ENGINE COOLANT" .
8. Repeat steps 1 through 7 until clear water begins to drain from radiator.
Checking Fuel LinesNLS0007T
Inspect fuel lines, fuel filler cap and fuel tank for improper attach-
ment, leaks, cracks, damage, loose connections, chafing or deterio-
ration.
If necessary, repair or replace damaged parts.
Changing Air Cleaner FilterNLS0007U
VISCOUS PAPER TYPE
The viscous paper type filter does not need cleaning between replacement intervals. Refer to MA-7,
"PERIODIC MAINTENANCE" .
Changing Engine OilNLS0007V
WARNING:

Be careful not to burn yourself, as engine oil may be hot.

Prolonged and repeated contact with used engine oil may cause skin cancer; try to avoid direct
skin contact with used engine oil. If skin contact is made, wash thoroughly with soap or hand
cleaner as soon as possible.
1. Warm up engine, put vehicle horizontally and check for engine oil leakage from engine components. Refer
to LU-27, "
ENGINE OIL LEAKAGE" .
2. Stop engine and wait for 15 minutes.
3. Loosen oil filler cap.
4. Remove mounting bolts, and then pull down the rear of front engine undercover and secure it using clip.
5. Remove drain plug and then drain engine oil.
6. Install drain plug with new washer. Refer to EM-187, "
OIL PAN AND OIL STRAINER" .
CAUTION:
Be sure to clean drain plug and install with new washer.Air relief plug:
: 1.2 N·m (0.12 kg-m, 11 in-lb)
SMA803A
PBIC0993E
Oil pan drain plug:
: 34.3 N·m (3.5 kg-m, 25 ft-lb)

PARKING BRAKE SYSTEM
PB-3
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Revision: 2007 April2007 M35/M45
PARKING BRAKE SYSTEMPFP:36010
On-Vehicle ServiceNFS000SS
PEDAL STROKE

Operate parking brake pedal with a force of 196 N (20 kg, 44 lb), make sure pedal stroke is within the
specified number of notches. (Check it by listening and counting ratchet clicks.)
INSPECT COMPONENTS

Make sure that the mounting conditions (looseness, backlash, etc.) of each component are normal.

Check the following:
–Device assembly for bend, damage and cracks. Replace if there are.
–Cables and equalizer for wear and damage. Replace if there are.
–Parking brake switch. Replace if it does not work correctly.
ADJUSTMENT

To perform adjustment operations, remove rear tires from vehicle with power tool.
1. Insert a deep socket wrench onto adjusting nut. Rotate adjusting
nut to fully loosen cable, and then release parking brake pedal.
2. Secure disc rotor to hub using wheel nut so as not to tilt disc
rotor.
3. Remove adjuster hole plug installed on the disc rotor. Turn the
adjuster in direction “A” using a flat-bladed screwdriver as
shown, until disc rotor is locked. Turn the adjuster in the oppo-
site direction by 5 or 6 notches after locking.
4. Rotate disc rotor to make sure that there is no drag. Install the
adjuster hole plug.
5. Adjust parking brake cable with the following procedure.
a. Operate parking brake pedal 10 or more times with the force of
full stroke.
b. Rotate adjusting nut to adjust parking brake pedal stroke using a
deep socket wrench.
CAUTION:
Do not reuse adjusting nut after removing it.
c. Operate parking brake pedal with a force of 196 N (20 kg, 44 lb), make sure the pedal stroke is within the
specified number of notches. (Check it by listening and counting ratchet clicks.)
d. Make sure that there is no drag on rear brake with parking brake pedal completely released.Pedal stroke : 3 - 4 notches
SFIA2961E
Pedal stroke : 3 - 4 notches
PFIA0295E

PARKING BRAKE SHOE
PB-7
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Revision: 2007 April2007 M35/M45
Removal and InstallationNFS000SW
REMOVAL
WARNING:
Clean brakes with a vacuum dust collector to minimize the hazard of air borne particles or other mate-
rials.
CAUTION:

Clean dust on disc rotor and back plate using a vacuum dust collector. Do not blow with com-
pressed air.

Put matching marks on both disc rotor and wheel hub when removing disc rotor.
1. Remove rear tires from vehicle with power tool.
2. Remove disc rotor with parking brake pedal completely in the released position. Refer to BR-30,
"Removal and Installation of Brake Caliper Assembly" .
3. If disc rotor cannot be removed, remove as follows:
a. Secure the disc rotor in place with wheel nuts and remove adjuster hole plug.
b. Using a flat-bladed screwdriver, rotate adjuster in direction “B” to
retract and loosen brake shoe.
4. Remove anti-rattle pins, retainers, anti-rattle springs, and return
springs.
5. Remove parking brake shoes, adjuster assembly, and toggle
lever.
6. For the removal of back plate, refer to RAX-5, "
Removal and
Installation" .
INSPECTION AFTER REMOVAL
Lining Thickness Inspection

Check thickness of lining.
Drum Inner Diameter Inspection

Check inner diameter of drum.
Other Inspections

Check the following:
–Lining for excessive wear, damage, and peeling.
–Shoe sliding surface for excessive wear and damage.
PFIA0309E
Standard thickness “A” : 3.2 mm (0.126 in)
Repair limit thickness “A” : 1.5 mm (0.059 in)
SBR021A
Standard inner diameter : 172 mm (6.77 in) dia.
Maximum inner diameter : 173 mm (6.81 in) dia.
SBR768A

PG-32
PDU (POWER DISTRIBUTION UNIT)
Revision: 2007 April2007 M35/M45
PDU (POWER DISTRIBUTION UNIT)PFP:285F1
Component Parts and Harness Connector LocationNKS004ED
System DescriptionNKS004EE

PDU (Power Distribution Unit) is the unit that executes the power distribution with the control signal from
the Intelligent Key unit, instead of the mechanical power supply mechanism by conventional key cylinder.

The push-button ignition switch is operable when the Intelligent Key is within the detention area of the
interior antenna or is inserted to the key slot.

The push-button ignition switch operation is input to the Intelligent Key unit as a request signal. Then, the
Intelligent Key unit processes the request signal and orders the PDU to switch into the appropriate power
supply position.
NOTE:
The prerequisite for starting the engine varies by the state of brake pedal, A/T selector lever, and vehicle
speed.

PDU distributes power to each power supply circuit according to the request signal received.

The power supply position can be confirmed by illumination of the indicators in the upper surroundings of
the push-button ignition switch.
PUSH-BUTTON IGNITION SWITCH OPERATING PROCEDURE
The power supply position switching operation can be performed by the following operation.
NOTE:

When an Intelligent Key is within the detection area of inside antenna and when it is inserted to the key
slot, it is equivalent to the operations below.

When starting the engine, the Intelligent Key unit monitors the engine start conditions (brake pedal operat-
ing condition, A/T selector lever position, and vehicle speed).
1. Fuse block (J / B) fuse layout 2. Fuse and fusible link box 3. PDU (power distribution unit)
M30,M31
4. Intelligent key unit M32,M33 5. Push-button ignition switch M27
PIIB6094E

HARNESS
PG-97
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Revision: 2007 April2007 M35/M45
PGC/V EC EVAP Canister Purge Volume Control Solenoid Valve
PHASE EC Camshaft Position Sensor (PHASE)
PHSB1 EC Camshaft Position Sensor (PHASE) (Bank 1)
PHSB2 EC Camshaft Position Sensor (PHASE) (Bank 2)
PNP/SW AT Park/Neutral Position Switch
PNP/SW EC Park/Neutral Position Switch
POS EC Crankshaft Position Sensor (CKPS) (POS)
POWER PG Power Supply Routing Circuit
PRE/SE EC EVAP Control System Pressure Sensor
PS/SEN EC Power Steering Pressure Sensor
PSB SB Pre-Crash Seat Belt
R/SEAT SE Auto Return Seat
RAS STC Rear Active Steer
ROOM/L LT Interior Room Lamp
RP/SEN EC Refrigerant Pressure Sensor
SEAT SE Power Seat
SEN/PW EC Sensor Power Supply
SHADE EI Rear Sunshade
SHIFT AT A/T Shift Lock System
SNOWSW EC Snow Mode Switch
SROOF RF Sunroof
SRS SRS Supplemental Restraint System
START SC Starting System
STOP/L LT Stop Lamp
STSIG AT Start Signal Circuit
T/WARN WT Low Tire Pressure Warning System
TAIL/L LT Parking, License and Tail Lamps
TLID BL Trunk Lid Opener
TPS1 EC Throttle Position Sensor (Sensor 1)
TPS2 EC Throttle Position Sensor (Sensor 2)
TPS3 EC Throttle Position Sensor
TRNSCV BL Homelink Universal Transceiver
TURN LT Turn Signal and Hazard Warning Lamp
VDC BRC Vehicle Dynamics Control System
VEHSEC BL Vehicle Security System
VENT/V EC EVAP Canister Vent Control Valve
VIAS EC Variable Induction Air Control System
VIAS/V EC VIAS Control Solenoid Valve
VSSA/T AT Vehicle speed Sensor A/T (Revolution Sensor)
WARN DI Warning Lamps
WINDOW GW Power Window
WIPER WW Front Wiper and Washer Code Section Wiring Diagram Name

POWER STEERING GEAR AND LINKAGE
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Revision: 2007 April2007 M35/M45
POWER STEERING GEAR AND LINKAGEPFP:49001
Removal and InstallationNGS000DC
COMPONENTS
CAUTION:
Spiral cable may be cut if steering wheel turns while separating steering column assembly and steer-
ing gear assembly. Be sure to secure steering wheel using string to avoid turning.
REMOVAL
1. Set vehicle to the straight-ahead position.
2. Remove tires from vehicle with a power tool.
3. Remove undercover from vehicle with a power tool.
4. Remove lower side fixing bolt of lower joint.
5. Remove cotter pin (1), and then loosen the nut.
6. Remove steering outer socket (2) from steering knuckle (3) so
as not to damage ball joint boot (4) using the ball joint remover
(suitable tool).
CAUTION:
Temporarily tighten the nut to prevent damage to threads
and to prevent the ball joint remover from suddenly coming
off.
7. Remove high and low pressure piping of hydraulic piping, and
then drain power steering fluid. Refer to PS-39, "
HYDRAULIC
LINE" .
1. Cotter pin 2. Steering gear assembly 3. Steering gear assembly
(AWD models)
Refer to GI-11, "
Components" , for the symbols in the figure.
SGIA1387E
SGIA0844E
SGIA1183E

POWER STEERING GEAR AND LINKAGE
PS-21
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Revision: 2007 April2007 M35/M45
Disassembly and AssemblyNGS000DD
COMPONENTS
CAUTION:

Disassemble and assemble steering gear assembly by securing the mounting area in a vise using
copper plates.

Clean steering gear assembly with kerosene before disassembling. Be careful to avoid splashing
or applying any kerosene over connector of discharge port or return port.
1. Outer socket 2. Boot clamp 3. Boot
4. Inner socket 5. Boot clamp (stainless wire) 6. End cover assembly
7. Rack oil seal 8. Rack Teflon ring 9. O-ring
10. Rack assembly 11. Gear housing assembly 12. Cylinder tubes
13. O-ring 14. Gear-sub assembly 15. power steering solenoid valve
16. Rear cover cap
Refer to GI-11, "
Components" , and the followings for the symbols in the figure.
: Apply power steering fluid.
: A p p l y G e n u i n e L i q u i d G a s k e t , T h r e e B o n d 1111 B o r e q u i v a l e n t .
: Apply multi-purpose grease.
SGIA1388E

PS-32
POWER STEERING OIL PUMP
Revision: 2007 April2007 M35/M45
DISASSEMBLY
NOTE:
Secure oil pump in a vise if necessary.
CAUTION:
Use copper plates when securing in a vise.
1. Remove rear cover mounting bolts, and then remove rear cover from body assembly.
2. Remove gasket from body assembly.
3. Remove dowel pin, cartridge and side plate from body assembly.
4. Remove pulley mounting nut and washer, then remove pulley from drive shaft.
5. Remove snap ring from drive shaft and press out it.
CAUTION:
When removing snap ring, be careful not to damage drive
shaft.
6. Remove oil seal from body assembly using a flat-bladed screw-
driver.
7. Remove O-ring from body assembly.
8. Remove lock nut, and then remove copper washer, joint and O-
ring.
9. Remove connector bolt, and then remove O-ring, flow control
valve and spring from body assembly
10. Remove mounting bolts of suction pipe, and then remove suc-
tion pipe from body assembly.
11. Remove O-ring from body assembly.
INSPECTION AFTER DISASSEMBLY
Body Assembly and Rear Cover Inspection
Check body assembly and rear cover for internal damage. Replace rear cover if it is damaged. Replace oil
pump assembly if body assembly is damaged.
Cartridge Assembly Inspection
Check cam ring, rotor and vane for damage. Replace cartridge assembly if there are.
Side Plate Inspection
Check side plate for damage. Replace side plate if there are.
Flow Control Valve Inspection
Check flow control valve and spring for damage. Replace if there are.
SST010B
SST034A