Infinity g35 manual.Infiniti G35 Owner's Manual

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If the problem occurs intermittently, perhaps the problem is caused by corrosion. It is a good idea to disconnect, inspect and clean the terminals on related connectors in the system. This test may indicate a loose or poorly mounted sensor or relay.

To inspect components under the hood, start by verifying the integrity of ground connections. Refer to Ground Inspection described later.

First check that the system is properly grounded. Then check for loose connection by gently shaking the wiring or components as previously explained. Using the wiring diagrams inspect the wiring for continuity.

Vehicle vibration can aggravate a harness which is routed along a bracket or near a screw. If the wiring runs under seating areas, inspect wire routing for possible damage or pinching.

In such cases you will want to check for a heat sensitive condition. To determine if an electrical component is heat sensitive, heat the component with a heat gun or equivalent. If incident occurs while heating the unit, either replace or properly insulate the component. Freezing The customer may indicate the incident goes away after the car warms up winter time. There are two methods to check for this. The first is to arrange for the owner to leave his car overnight.

Make sure it will get cold enough to demonstrate his complaint. Leave the car parked outside overnight. In the morning, do a quick and thorough diagnosis of those electrical components which could be affected. The second method is to put the suspect component into a freezer long enough for any water to freeze.

Reinstall the part into the car and check for the reoccurrence of the incident. If it occurs, repair or replace the component. In such cases the incident could be caused by water intrusion on an electrical part. This can be simulated by soaking the car or running it through a car wash.

Do not spray water directly on any electrical components. Electrical Load The incident may be electrical load sensitive. In these cases you may have to keep the car overnight to make a proper diagnosis. Before beginning it is important to have all available information on the system to be tested. Also, get a thorough understanding of system operation. Then you will be able to use the appropriate equipment and follow the correct test procedure. You may have to simulate vehicle vibrations while testing electrical components.

Gently shake the wiring harness or electrical component to do this. A circuit is open when there is no continuity through a section of the circuit. There are two types of shorts. This will help you to logically walk through the diagnosis process. Drawing the sketch will also reinforce your working knowledge of the system. The digital multimeter DMM set on the resistance function will indicate an open circuit as over limit no beep tone or no ohms symbol.

Make sure to always start with the DMM at the highest resistance level. To help in understanding the diagnosis of open circuits, please refer to the previous schematic. Little or no resistance will indicate that portion of the circuit has good continuity.

If there were an open in the circuit, the DMM would indicate an over limit or infinite resistance condition. GI In any powered circuit, an open can be found by methodically checking the system for the presence of voltage. This is done by switching the DMM to the voltage function. C no voltage; open is between fuse block and SW1 point A.

D no voltage; open is between SW1 and relay point B. E no voltage; open is between relay and solenoid point C. Any powered circuit can be diagnosed using the approach in the previous example. Connect the other probe to a known good ground. Put probes at the load side of fuse terminal and a known good ground. Then, check for continuity. SW1 open, relay disconnected and solenoid disconnected powered through the fuse. Revision: July.

With SW1 closed, relay and solenoid disconnected and the DMM leads across both fuse terminals, check for voltage. With SW1 closed, relay contacts jumped with fused jumper wire check for voltage. Ground Inspection Ground connections are very important to the proper operation of electrical and electronic circuits. Ground connections are often exposed to moisture, dirt and other corrosive elements. The corrosion rust can become an unwanted resistance. This unwanted resistance can change the way a circuit works.

Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drastically affect an electronically controlled circuit. A poor or corroded ground can easily affect the circuit.

Even when the ground connection looks clean, there can be a thin film of rust on the surface. Make sure all of the wires are clean, securely fastened and providing a good ground path. If multiple wires are cased in one eyelet make sure no ground wires have excess wire insulation. Voltage Drop Tests Voltage drop tests are often used to find components or circuits which have excessive resistance.

A voltage drop in a circuit is caused by a resistance when the circuit is in operation. Check the wire in the illustration. When measuring resistance with DMM, contact by a single strand of wire will give reading of 0 ohms.

This would indicate a good circuit. When the circuit operates, this single strand of wire is not able to carry the current. The single strand will have a high resistance to the current. This will be picked up as a slight voltage drop.

The positive lead of the DMM should be closer to power and the negative lead closer to ground. Note in the illustration that there is an excessive 4. The Computer Controlled system operations can be adversely affected by any variation in resistance in the system.

Such resistance variation may be caused by poor connection, improper installation, improper wire gauge or corrosion. The step by step voltage drop test can identify a component or wire with too much resistance. The voltage value is based on the body ground. Control unit does not detect the switch is ON even if the switch does not turn ON. Therefore, the control unit does not supply power to light up the lamp. Therefore, the control unit does not control ground to light up the lamp. Never reverse polarity of battery terminals.

Install only parts specified for a vehicle. Before replacing the control unit, check the input and output and functions of the component parts.

Do not apply excessive force when disconnecting a connector. If a connector is installed by tightening bolts, loosen bolt mounting it, then take it out by hand. Before installing a connector, make sure the terminal is not bent or damaged, and then correctly connect it. When installing a connector by tightening bolts, fix it by tightening the mounting bolt until the painted projection of the connector becomes even with the surface. For removal of the lever type connector, pull the lever up to the direction pointed to by the arrow A in the figure, and then remove the connector.

For installation of the lever type connector, pull down the lever to the direction pointed by the arrow B in the figure, and then push the connector until a clicking noise is heard. Do not apply excessive shock to the control unit by dropping or hitting it. Be careful to prevent condensation in the control unit due to rapid temperature changes and do not let water or rain get on it. If water is found in the control unit, dry it fully and then install it in the vehicle.

Be careful not to let oil to get on the control unit connector. Avoid cleaning the control unit with volatile oil. Do not disassemble the control unit, and do not remove the upper and lower covers.

When using a DMM, be careful not to let test probes get close to each other to prevent the power transistor in the control unit from damaging battery voltage because of short circuiting. When checking input and output signals of the control unit, use the specified check adapter. When it is connected with a diagnostic connector equipped on the vehicle side, it will communicate with the control unit equipped in the vehicle and then enable various kinds of diagnostic tests.

Current self-diagnostic results and all trouble diagnostic records previously stored can be read. Use of another battery may present a risk of fire or explosion. The battery may present a fire or chemical burn hazard if mistreated.

Do not recharge, disassemble or dispose of in fire. If necessary, turn on the ignition switch. Power supply and ground circuit for the control unit of the system For detailed circuit, refer to wiring diagram for each system. Open or short circuit CAN communication line.

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here. Make sure to avoid damaging pipes, tubes, etc. Always use safety stands when you have to get under the vehicle. WARNING: When lifting the vehicle, open the lift arms as wide as possible and ensure that the front and rear of the vehicle are well balanced.

When setting the lift arm, do not allow the arm to contact the brake tubes, brake cable, fuel lines and sill spoiler. Towing is in accordance with Towing Procedure Manual at dealer. If any unit is damaged, dollies must be used. This may cause serious and expensive damage to the transmission. Never place the ignition key in the LOCK position. This will result in damage to the steering lock mechanism. FRONT After removing the front licence plate if so equipped or the recovery hook cover, securely install the recovery hook.

This could cause them to explode and result in serious injury. Parts of your vehicle could also overheat and be damaged. Never tow the vehicle using the vehicle tie downs or recovery hooks. Never pull on the hook at an angle. Special parts are excluded. This standard is applicable to bolts having the following marks embossed on the bolt head.

Refer to the following chart for help in selecting the appropriate chemical product or sealant. Product Description. For metal-to-metal flange sealing. Can fill a 0. Provides instant sealing on any threaded straight or parallel threaded fitting. Thread sealant only, no locking ability. All emission related terms used in this publication in accordance with SAE J are listed. Removal and Installation Before starting work, make sure no fire or spark producing items are in the work area.

Release fuel pressure before disconnecting and disassembly. After disconnecting pipes, plug openings to stop fuel leakage. When instructed to use special service tools, use the specified tools. Always be careful to work safely, avoid forceful or uninstructed operations.

Exercise maximum care to avoid damage to mating or sliding surfaces. Cover openings of engine system with tape or the equivalent, if necessary, to seal out foreign materials.

Mark and arrange disassembly parts in an organized way for easy troubleshooting and assembly. When loosening bolts and nuts, as a basic rule, start with the one furthest outside, then the one diagonally opposite, and so on. If the order of loosening is specified, do exactly as specified. Power tools may be used where noted in the step. Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and replace if necessary. When tightening bolts and nuts, as a basic rule, equally tighten in several different steps starting with the ones in center, then ones on inside and outside diagonally in this order.

If the order of tightening is speci- A fied, do exactly as specified. Replace with new gasket, packing, oil seal or O-ring. Dowel pins are used for several parts alignment. When replacing and reassembling parts with dowel pins, EM make sure that dowel pins are installed in the original position. Thoroughly wash, clean, and air-blow each part. Carefully check engine oil or engine coolant passages for any restriction and blockage.

C Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust. Before assembly, oil sliding surfaces well. Release air within route when refilling after draining engine coolant. D After repairing, start engine and increase engine speed to check engine coolant, fuel, engine oil, and exhaust systems for leakage. Use angle wrench [SST: KV BTA ] for the final tightening of the following engine parts: Cylinder head bolts Main bearing cap bolts Connecting rod cap bolts Crankshaft pulley bolt Do not use a torque value for final tightening.

The torque value for these parts are for a preliminary step. Ensure thread and seat surfaces are clean and coated with engine oil. After removing the mounting bolts and nuts, separate the mating surface using a seal cutter [SST] and remove the old liquid gasket sealing. In areas where the seal cutter [SST] is difficult to use, use a plastic hammer to lightly tap 1 seal cutter where liquid gasket is applied. Use plastic hammer to slide seal cutter 2 by tapping on the side.

Using a scraper, remove the old liquid gasket adhering to the gasket application surface and the mating surface. Wipe the liquid gasket application surface and the mating surface with white gasoline lighting and heating use to remove adhering moisture, grease and foreign material. Apply liquid gasket without breaks to the specified location with the specified dimensions.

If there is a groove for the liquid gasket application, apply gasket to the groove. Occasionally, it should be applied outside the holes.

Make sure to read the text of this manual. Tool name STS — Engine stand assembly 1. ST — Engine stand 2. ST — Base.

KV has been replaced with KV KV is no longer in production, but it is usable. KV JA Valve spring compressor 1. KV J Attachment 2. KV — Adaptor.

Installing valve oil seal Use side A. Reconditioning the exhaust system threads before installing a new heated oxygen sensor Use with anti-seize lubricant shown below. Locate the area where noise occurs. Confirm the type of noise.

Specify the operating condition of engine. Check specified noise source. If necessary, repair or replace these parts. Operating condition of engine Location of noise Top of engine Rocker cover Cylinder head. Piston to cylinder bore clearance Piston ring side clearance Piston ring end gap Connecting rod bend and torsion. Inspect belts for cracks, fraying, wear and oil.

If necessary, replace. Inspect drive belt deflection or tension at a point on the belt midway between pulleys. When measuring deflection, apply 98 N 10 kg, 22 lb at the marked point. Then, after turning the crankshaft two turns or more, re-adjust to the specified value to avoid variation in deflection between pulleys.

Then, after turning crankshaft two turns or more, re-adjust to the specified value to avoid variation in deflection between pulleys. Remove undercover with power tool.

Loosen idler pulley lock nut A and adjust tension by turning adjusting bolt B. Tighten nut A. Loosen idler pulley lock nut C and adjust tension by turning adjusting bolt D.

Tighten nut C. Remove alternator and power steering oil pump belt. Be careful to keep grease away from belt. Install belts to pulley in the reverse order of removal. Make sure belt is correctly engaged with the pulley groove. Check for engine oil and engine coolant are not adhered to belt and each pulley groove. Adjust belt tension. Tighten each adjusting bolt and nut to the specified torque.

Make sure that tension of each belt is within the standard. Remove engine cover with power tool. Remove air duct inlet. Disconnect harness connector from mass air flow sensor. Disconnect PCV hose. Remove mass air flow sensor from air cleaner case. Remove resonator in fender, lifting left fender protector. Align marks. Attach each joint.

Screw clamps firmly. Remove air duct inlet from air cleaner case. Loosen clamp bolts of air hose. Remove mounting bolts for air cleaner case. Then push air cleaner case straight down. To avoid the danger of being scalded, do not drain the engine coolant when the engine is hot.

Gasket for intake manifold collector upper is secured together with mounting bolt for intake manifold collector lower. Thus, even when only gasket for upper side is replaced, gasket for lower side must be also replaced. Drain engine coolant, or when water hose is disconnected, attach plug to prevent engine coolant leakage.

Remove air cleaner case and air duct. Remove electric throttle control actuator as follows: Disconnect harness connector. Loosen bolts in reverse order as shown in the figure. Remove fuel sub-tube mounting bolt to disconnect from rear of intake manifold collector lower. Disconnect vacuum hose and water hose from intake manifold collector upper. Remove EVAP canister purge volume control solenoid valve bracket mounting bolt from intake manifold collector upper.

Loosen bolts in reverse order as shown in the figure to remove intake manifold collector upper with power tool. Remove PCV hose [between intake manifold collector lower and rocker cover right bank ]. Loosen bolts in reverse order as shown in the figure, and remove the intake manifold collector cover, gasket, intake manifold collector lower and gasket with power tool. Check the surface distortion of both the intake manifold collector upper and lower mating surfaces with straightedge and feeler gauge.

Indication of Part Installation Direction Referring to front marks, install parts shown in the figure. Tighten in numerical order as shown in the figure. NOTE: Tighten mounting bolts to secure gasket lower , intake manifold collector lower , gasket upper , and intake manifold collector cover. If stud bolts were removed, install them and tighten to the torque specified below.

Shank length under bolt head varies with bolt location. Install bolts while referring to numbers shown below and in the figure. Bolt length does not include pilot portion. Install gasket with three protrusions for installation check facing any direction other than upward. Release fuel pressure. Remove intake manifold collectors upper and lower. Remove fuel tube and fuel injector assembly. Loosen bolts and nuts in reverse order as shown in the figure to remove intake manifold.

Remove intake manifold gaskets. Check the surface distortion of the intake manifold mating surface with straightedge and feeler gauge. If stud bolts were removed, install them and tighten to the specified torque below. Tighten all mounting bolts and nuts to the specified torque in two or more steps in numerical order shown in the figure.

Drain engine coolant. Disconnect harness connector and remove heated oxygen sensor 2 on both banks with heated oxygen sensor wrench [SST]. Remove exhaust mounting bracket between three way catalyst right and left bank and transmission. Remove three way catalyst. Disconnect harness connector and remove air fuel ratio sensor 1 on both banks with heated oxygen sensor wrench [SST]. Remove water pipe and heater pipe on both right and left side. Loosen mounting nuts with power tool in reverse order as shown in the figure to remove exhaust manifold.

Check the surface distortion of the exhaust manifold mating surface with straightedge and feeler gauge. Install in direction shown below. Follow same procedure for both banks. Locate round press in thick side of port connecting part above center level line of port. Install exhaust manifold in numerical order as shown in the figure.

The numerical order No. Install air fuel ratio sensor 1 and heated oxygen sensor 2 in the original position. Install referring the following if the installation positions cannot be identified. Heated Oxygen Sensor 2 Bank 1 Harness AWD model The section of the harness between heated oxygen sensor 2 bank 1 and the clamp should be installed tensely due to the secure clearance with front propeller shaft. Step 1 to 3 and 6 to 20 are unnecessary. Remove hood assembly.

Remove air duct. Drain engine oil. Disconnect heater hose from heater pipe. Install engine slinger to sling engine assembly for positioning. Remove front suspension member. Remove drive belts. Remove alternator. Remove idler pulley. Remove starter motor. Disconnect oil cooler water hoses, and remove oil cooler water pipe mounting bolt. Remove oil filter, as necessary.

Remove oil cooler, as necessary. Remove oil pressure switch, as necessary. Remove oil temperature sensor, as necessary. Remove crankshaft position sensor POS. Remove oil pan lower as follows: a. Loosen mounting bolts with power tool in reverse order as shown in the figure to remove. Insert seal cutter [SST] between oil pan upper and oil pan lower. Slide seal cutter by tapping on the side of tool with hammer. Remove oil pan lower. Remove baffle plate. Remove oil strainer. Remove transmission joint bolts which pierce oil pan upper.

Remove rear plate cover. Loosen mounting bolts with power tool in reverse order as shown in the figure to remove oil pan upper. Remove oil pan upper. Use scraper to remove old liquid gasket from mating surfaces. Install new oil pan gaskets. To install, align protrusion of oil pan gasket with notches of front timing chain case and rear oil seal retainer.

Install oil pan gasket with smaller arc to front timing chain case side. Apply a continuous bead of liquid gasket with tube presser [SST: WS — ] to the cylinder block mating surface of oil pan upper to a limited portion as shown in the figure. Install the oil pan upper. Refer to the following for locating bolts. Tighten transmission joint bolts. Install oil strainer to oil pump. Install baffle plate. Install oil pan lower as follows: Use scraper to remove old liquid gasket from mating surfaces.

Apply a continuous bead of liquid gasket with tube presser [SST: WS — ] to the oil pan lower as shown in the figure. Install oil pan drain plug. Install in the reverse order of removal after this step. NOTE: At least 30 minutes after oil pan is installed, pour engine oil. Check engine oil level and adjust engine oil.

Start engine, and check there is no leak of engine oil. Stop engine and wait for 10 minutes. Check engine oil level again. NOTE: When removing oil pan lower or oil strainer only, take step 1 then step 25 and Remove air hose and air duct to mass air flow sensor side and electric throttle control actuator side.

Remove front and rear undercover with power tool. Install engine front slinger and engine rear slinger to sling engine assembly for positioning.

Slinger bolts: : Remove front drive shaft LH and RH. Remove side shaft. Remove front propeller shaft. Remove alternator stay.

Remove oil filter bracket, as necessary. Remove front final drive assembly. Remove oil pan lower as the following: Loosen mounting bolts in reverse order as shown in the figure. Insert seal cutter [SST] between oil pan lower and oil pan upper. Loosen oil pan upper bolts with power tool in reverse order as shown in the figure to remove.

Slide seal cutter by tapping on the side of tool with a hammer. Remove axle pipe, as necessary. Install axle pipe to oil pan, if removed. Unit: mm in. Install axle pipe to oil pan from axle pipe flange side LH side using a suitable drift [43 - 57 mm 1. Install oil pan upper as the following: Use scraper to remove old liquid gasket from mating surfaces. Apply liquid gasket to oil pan gaskets as shown in the figure. Tighten bolts in numerical order as shown in the figure.

There are two types of mounting bolts. Install oil pan lower as follows. Apply a continuous bead of liquid gasket thoroughly with tube presser [SST: WS — ] to oil pan lower as shown in the figure.

Check the engine oil level and adjust engine oil. Check the engine oil level again. Remove air cleaner case and air duct for ignition coil of left bank side. Move aside harness, harness bracket, and hoses located above ignition coil. Disconnect harness connector from ignition coil. Remove ignition coil. Remove spark plug using spark plug wrench commercial service tool.

Use standard type spark plug for normal condition. Remove fuel feed hose with damper from fuel sub-tube. NOTE: There is no fuel return route. When separating fuel feed hose with damper and centralized under-floor piping connection, disconnect quick connector as follows: Remove quick connector cap from quick connector connection on right member side. Disconnect fuel feed hose with damper from bracket hose clamp. With the sleeve side of quick connector release facing quick connector, install quick connector release onto fuel tube.

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