-1 QUICK REFERENCE INDEX A GENERAL INFORMATION GI General Information B ENGINE EM Engine Mechanical LU Engine Lubrication System CO Engine Cooling System EC Engine Control System FL Fuel System EX Exhaust System ACC Accelerator Control System C TRANSAXLETRANSMISSION/ CL Clutch MT Manual Transaxle AT Automatic Transaxle D DRIVELINE/AXLE FAX Front Axle RAX Rear Axle E SUSPENSION FSU Front Suspension RSU Rear Suspension WT Road Wheels & Tires F BRAKES BR Brake System PB Parking Brake System BRC Brake Control System G STEERING PS Power Steering System H RESTRAINTS SB Seat Belts SRS Supplemental Restraint System (SRS) I BODY BL Body, Lock & Security System GW Glasses, Window System & Mirrors RF Roof EI Exterior & Interior IP Instrument Panel SE Seat J AIR CONDITIONER ATC Automatic Air Conditioner MTC Manual Air Conditioner K ELECTRICAL SC Starting & Charging System LT Lighting System DI Driver Information System WW Wiper, Washer & Horn BCS Body Control System LAN LAN System AV Audio Visual & Telephone System ACS Auto Cruise Control System PG Power Supply, Ground & Circuit Elements L MAINTENANCE MA Maintenance M INDEX IDX Alphabetical Index Edition: September 2003 Revision: May 2004 Publication No. SM4E-1L31U2 DB © 2004 NISSAN NORTH AMERICA, INC. All rights reserved. No part of this Service Manual may be reproduced or stored in a retrieval system, or transmitted in any form, or by any means, electronic, mechanical, photo-copying, recording or otherwise, without the prior written permission of Nissan North America, Inc., Gardena, California. MGCAEFHIJKL
IMPORTANT SAFETY NOTICE
The proper performance of service is essential for both the safety of the technician and the efficient functioning of the vehicle. The service methods in this Service Manual are described in such a manner that the service may be performed safely and accurately. Service varies with the procedures used, the skills of the technician and the tools and parts available. Accordingly, anyone using service procedures, tools or parts which are not specifically recommended by NISSAN must first be completely satisfied that neither personal safety nor the vehicle’s safety will be jeopardized by the service method selected.
In order to assure your safety and the efficient functioning of the vehicle, this manual should be read thoroughly. It is especially important that the PRECAUTIONS in the GI section be completely understood before starting any repair task. All information in this manual is based on the latest product information at the time of publication. The right is reserved to make changes in specifications and methods at any time without notice.
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This manual contains maintenance and repair procedures for the 2004 NISSAN ALTIMA.
QUICK REFERENCE CHART: ALTIMA (EQUIPPED WITH 2.5L, QR ENGINE) 2004 QUICK REFERENCE CHART: ALTIMA (EQUIPPED WITH 2.5L, QR ENGINE) PFP:00000 Engine Tune-Up Data ELS0016N *1: Under the following conditions: ● Air conditioner switch: OFF ● Electric load: OFF (lights, heater fan, and rear window defogger) ● Steering wheel: keep in straight-ahead position Drive Belt Deflection and Tension Spark Plugs (Double Platinum Tipped) Front Wheel Alignment (Unladen*1) ELS0016O Cylinder arrangement In-line 4 Displacementcm3 (in3 ) 2,488 (151.82) Bore and strokemm (in) 89.0 x 100 (3.50 - 3.94) Valve arrangement DOHC Firing order 1-3-4-2 Number of piston rings Oil1Compression2 Compression ratio 9.5:1 Compression pressure kPa (kg/cm2 , psi) / 250 rpm Standard1,250 (12.8, 181.3) Minimum1,060 (10.8, 153.7) Differential limit between cylinders100 (1.0, 14) Idle speed rpm No-load *1 (in “P” or “N” position) 700 ± 50 Ignition timing (BTDC at idle speed in “P” or “N” position) 15° ± 5° CO% at idle 0.3 – 9.5% and engine runs smoothly Radiator cap relief pressure kPa (kg/cm2 , psi) Standard79 – 98 (0.8 – 1.0, 11 – 14) Limit59 (0.6, 9) Cooling system leakage testing pressure kPa (kg/cm2 , psi) 157 (1.6, 23) Tension of drive belts Auto adjustment by auto-tensioner Type ColdPLFR6A-11HotPLFR4A-11StandardPLFR5A-11 Plug gap (nominal) 1.1 mm (0.043 in) Tire size 205/65R16 DegreeCamberminute (Decimal degree) Minimum 1°00′ ( 1.00°) Nominal 0°15′ ( 0.25°) Maximum0°30′ (0.50°) Left and right difference0°45 ′ (0.75 °) or less DegreeCaster minute (Decimal degree) Minimum2°05′ (2.08°) Nominal2°50′ (2.83°) Maximum3°35′ (3.58°) Left and right difference0°45 ′ (0.75 °) or less
2004 QUICK REFERENCE CHART: ALTIMA (EQUIPPED WITH 2.5L, QR ENGINE) *1: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions. *2: On power steering models, wheel turning force (at circumference of steering wheel) of 98 to 147 N (10 to 15 kg, 22 to 33 lb) with engine idle. Rear Wheel Alignment (Unladen*) ELS0016P Kingpin inclination Degree minute (Decimal degree) Minimum13°50 ′ (13.83°) Nominal14°35 ′ (14.58°) Maximum15°20 ′ (15.33°) Total toe-in Distance (A B) mm (in) Minimum 0.5 ( 0.02) Nominal0.5 (0.02) Maximum1.5 (0.06) Angle (left plus right) Degree minute (Decimal degree) Minimum 0 °4′ ( 0.07 °) Nominal0 °2′ (0.03°) Maximum0 °8′ (0.13°) Wheel turning angle Full turn*2 DegreeInside minute (Decimal degree) Minimum34 °30′ (34.5°) Nominal38 °00′ (38.0°) Maximum39 °00′ (39.0°) DegreeOutside minute (Decimal degree) Nominal30 °30′ (30.5°) Tire size 205/65R16 SFA234AC DegreeCamberminute (Decimal degree) Minimum 0 °04′ ( 0.07°) Nominal 0 °34′ ( 0.57°) Maximum 0 °64′ ( 1.07°) Total toe-inDistance (A B) mm (in) Minimum2.4 (0.09) Nominal3.9 (0.15) Maximum5.4 (0.21) Angle (left plus right) Degree minute (Decimal degree) Minimum0°6′ (0.1°) Nominal0°10 ′ (0.167 °) Maximum0°14 ′ (0.233 °) SFA234AC
QUICK REFERENCE CHART: ALTIMA (EQUIPPED WITH 2.5L, QR ENGINE) 2004 *: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions. Brake ELS0016Q Unit: mm (in) Disc Brake - Repair Limits Unit: mm (in) Brake Pedal Unit: mm (in) *: Measured from surface of dash reinforcement panel to surface of pedal pad Refill Capacities ELS0016R Front brake Brake modelCLZ25VD disc brake Cylinder bore diameter57.2 (2.252) Pad Length × width × thickness125.6 × 46 × 11 (4.94 × 1.81 × 0.43) Rotor outer diameter × thickness296 × 26 (11.65 × 1.02) Rear brake Brake modelAD9V disc brake Cylinder bore diameter34.9 (1.3740) Pad Length × width × thickness89.1 × 39.5 × 10 (3.508 × 1.555 × 0.31) Rotor outer diameter × thickness292 × 9 (11.50 × 0.35) Master cylinderCylinder bore diameter23.81 (15/16) Control valveScrew in type30 × 0.4 (1.18 × 0.02) Brake booster Booster DiaphragmmodelM215TdiameterPrimary230(9.06)Secondary205(8.07) Recommended brake fluid Genuine NISSAN Super Heavy Duty Brake Fluid or equivalent DOT 3 (US FMVSS No. 116) Brake modelCLZ25VD (Front)AD9V (Rear) Pad wear limitMinimum thickness2.0 (0.079)1.5 (0.059) Rotor repair limit Maximum runout0.07 (0.0028)0.07 (0.0028) Minimum thickness22.0 (0.866)8.0 (0.31) Free height “H”* M/T164.1 - 174.1 (6.46 - 6.85) A/T173.1 - 183.1 (6.81 - 7.21) Clearance “C” between pedal stopper and threaded end of stop lamp switch or ASCD switch0.74 - 1.96 (0.0291 - 0.0772) Description Capacity (Approximate) US measureImp measureLiter Fuel 20 gal16 5/8 gal75.6 Engine oil Drain and refill With oil filter change4 1/2 qt3 3/4 qt4.2 Without oil filter change4 1/4 qt3 1/2 qt4.0 Dry engine (engine overhaul) 4 7/8 qt4 qt4.6 Cooling system Without reservoir7 1/4 qt6 1/8 qt6.9 Reservoir3/4 qt5/8 qt0.7 Manual transaxle fluid (MTF) 2 3/8 qt2 qt2.3 Automatic transaxle fluid (ATF) 9 3/4 qt8 1/8 qt9.2 Power steering fluid (PSF)2 1/8 pt1 3/4 pt1.0 Air conditioning system refrigerant1.045 - 1.155 lb1.045 - 1.155 lb0.475 - 0.525 kg Air conditioning system lubricant5.01 fl oz5.03 fl oz 150 m
QUICK REFERENCE CHART: ALTIMA (EQUIPPED WITH 3.5L, VQ ENGINE) 2004 QUICK REFERENCE CHART: ALTIMA (EQUIPPED WITH 3.5L, VQ ENGINE) PFP:00027 Engine Tune-Up Data ELS0016S *1: Under the following conditions: ● Air conditioner switch: OFF ● Electric load: OFF (Lights, heater fan & rear window defogger) ● Steering wheel: Kept in straight-ahead position Cylinder arrangement V-6 Displacementcm3 (in3 ) 3,498 (213.45) Bore and strokemm (in) 95.5 x 81.4 (3.76 - 3.205) Valve arrangement DOHC Firing order 1-2-3-4-5-6 Number of piston rings Oil1Compression2 Number of main bearings 4 Compression ratio 10.0:1 Compression pressure kPa (kg/cm2 , psi) / 250 rpm Standard1,275 (13.0, 185) Minimum981 (10.0, 142) Differential limit between cylinders98 (1.0, 14) Idle speed rpm No-load *1 (in “P” or N” position) 700 ± 50 Ignition timing (BTDC at idle speed in “P” or “N” position) 15° ± 5° CO% at idle 0.7 – 9.9% and engine runs smoothly Radiator cap relief pressure kPa (kg/cm2 , psi) Standard79 – 98 (0.8 – 1.0, 11 – 14) Limit59 (0.6, 9) Cooling system leakage testing pressure kPa (kg/cm2 , psi) 157 (1.6, 23)
2004 QUICK REFERENCE CHART: ALTIMA (EQUIPPED WITH 3.5L, VQ ENGINE) Drive Belt Deflection and Tension *: If belt tension gauge cannot be installed at check points shown, check drive belt tension at different location on the belt. Spark Plugs (Double Platinum Tipped) Description Deflection adjustment Unit: mm (in)Tension adjustment* Unit: N (kg, lb) Used belt New belt Used belt New belt LimitAfter adjustmentLimit After adjustment Alternator and air compressorconditioning 7 (0.28) 4.2 - 4.6 (0.17 - 0.18) 3.7 - 4.1 (0.15 - 0.16) 294 (30, 66) 730 - 818 (74.5 - 83.5, 164 - 184) 838 - 926 (85.5 - 94.5, 188 - 208) Power steering pump 11 (0.43) 7.3 - 8 (0.29 - 0.30) 6.5 - 7.2 (0.26 - 0.28) 196 (20, 44) 495 - 583 (50.5 - 59.5, 111 - 131) 603 - 691 (61.5 - 70.5, 135.6 - 155.4) Applied pushing force 98 (10, 22) — LBIA0076E Type ColdPLFR6A-11HotPLFR4A-11StandardPLFR5A-11 Plug gap (nominal) 1.1 mm (0.043 in)
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QUICK REFERENCE CHART: ALTIMA (EQUIPPED WITH 3.5L, VQ ENGINE) 2004 Front Wheel Alignment (Unladen*1) ELS0016T *1: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions. *2: On power steering models, wheel turning force (at circumference of steering wheel) of 98 to 147 N (10 to 15 kg, 22 to 33 lb) with engine idle. Rear Wheel Alignment (Unladen*) ELS0016U Tire size 215/55R17 DegreeCamberminute (Decimal degree) Minimum 1°00′ ( 1.00°) Nominal 0°15′ ( 0.25°) Maximum0°30′ (0.50°) Left and right difference0°45 ′ (0.75 °) or less DegreeCaster minute (Decimal degree) Minimum2°05′ (2.08°) Nominal2°50′ (2.83°) Maximum3°35′ (3.58°) Left and right difference0°45 ′ (0.75 °) or less Kingpin inclination Degree minute (Decimal degree) Minimum13 °50′ (13.83 °) Nominal14 °35′ (14.58 °) Maximum15 °20′ (15.33 °) Total toe-in Distance (A B) mm (in) Minimum 0.5 ( 0.02) Nominal0.5 (0.02) Maximum1.5 (0.06) Angle (left plus right) Degree minute (Decimal degree) Minimum 0°4′ ( 0.07°) Nominal0°2′ (0.03 °) Maximum0°8′ (0.13 °) Wheel turning angle Full turn*2 DegreeInside minute (Decimal degree) Minimum32°00′ (32.0°) Nominal35°30′ (35.5°) Maximum36°30′ (36.5°) DegreeOutside minute (Decimal degree) Nominal29°00′ (29.0°) SFA234AC DegreeCamberminute (Decimal degree) Minimum 0°10′ ( 0.17 °) Nominal 0°40′ ( 0.67 °) Maximum 0°70′ ( 1.17 °)
2004 QUICK REFERENCE CHART: ALTIMA (EQUIPPED WITH 3.5L, VQ ENGINE) *: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions. Brake ELS0016V Unit: mm (in) Disc Brake - Repair Limits Unit: mm (in) Brake Pedal Unit: mm (in) *: Measured from surface of dash reinforcement panel to surface of pedal pad Total toe-inDistance (A B) mm (in) Minimum2.5 (0.10) Nominal4.0 (0.16) Maximum5.5 (0.22) Angle (left plus right) Degree minute (Decimal degree) Minimum0°6′ (0.1°) Nominal0°10 ′ (0.167 °) Maximum0°14 ′ (0.233 °) SFA234AC Front brake Brake modelCLZ25VD disc brake Cylinder bore diameter57.2 (2.252) Pad Length × width × thickness125.6 × 46 × 11 (4.94 × 1.81 × 0.43) Rotor outer diameter × thickness296 × 26 (11.65 × 1.02) Rear brake Brake modelAD9V disc brake Cylinder bore diameter34.9 (1.3740) Pad Length × width × thickness89.1 × 39.5 × 10 (3.508 × 1.555 × 0.31) Rotor outer diameter × thickness292 × 9 (11.50 × 0.35) Master cylinderCylinder bore diameter23.81 (15/16) Control valveScrew in type30 × 0.4 (1.18 × 0.02) Brake booster Booster DiaphragmmodelM215TdiameterPrimary230(9.06)Secondary205(8.07) Recommended brake fluid Genuine NISSAN Super Heavy Duty Brake Fluid or equivalent DOT 3 (US FMVSS No. 116) Brake modelCLZ25VD (Front)AD9V (Rear) Pad wear limitMinimum thickness2.0 (0.079)1.5 (0.059) Rotor repair limit Maximum runout0.07 (0.0028)0.07 (0.0028) Minimum thickness22.0 (0.866)8.0 (0.31) Free height “H”* M/T164.1 - 174.1 (6.46 - 6.85) A/T173.1 - 183.1 (6.81 - 7.21) Clearance “C” between pedal stopper and threaded end of stop lamp switch or ASCD switch0.74 - 1.96 (0.0291 - 0.0772)
QUICK REFERENCE CHART: ALTIMA (EQUIPPED WITH 3.5L, VQ ENGINE) 2004 Refill Capacities ELS0016W Description Capacity (Approximate) US measureImp measureLiter Fuel 20 gal16 5/8 gal75.6 Engine oil Drain and refill With oil filter change4 1/4 qt3 1/2 qt4.0 Without oil filter change3 7/8 qt3 1/4 qt3.7 Dry engine (engine overhaul) 5 1/4 qt4 3/8 qt5.0 Cooling system Without reservoir7 7/8 qt6 5/8 qt7.5 Reservoir3/4 qt5/8 qt0.7 Manual transaxle fluid (MTF) 4 7/8 pt4 pt2.3 Automatic transaxle fluid (ATF)9 3/4 qt8 1/8 qt9.2 Power steering fluid (PSF)2 1/8 pt1 3/4 pt1.0 Air conditioning system refrigerant1.045 - 1.155 lb1.045 - 1.155 lb0.475 - 0.525 kg Air conditioning system lubricant5.01 fl oz5.03 fl oz 150 m
GI-1 GENERAL INFORMATION A GENERAL INFORMATIONCONTENTS GIMGDCEFHIJKLBSECTION Revision: May 2004 2004 Altima PRECAUTIONS ..........................................................3 Description ...............................................................3 Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER” ..................................................................3 General Precautions ................................................3 Precautions for Three Way Catalyst .........................5 Precautions for Fuel (Unleaded Premium Gasoline Required) PrecautionsPrecautionsPrecautionsEnginePrecautions.................................................................5forMultiportFuelInjectionSystemorControlSystem............................................5forHoses..............................................6HOSEREMOVALANDINSTALLATION...............6HOSECLAMPING................................................6forEngineOils......................................6HEALTHPROTECTIONPRECAUTIONS.............6ENVIRONMENTALPROTECTIONPRECAU-TIONS...................................................................7forAirConditioning...............................7 HOW TO USE THIS MANUAL ...................................8 Description ...............................................................8 Terms .......................................................................8 Units AbbreviationsHowHowComponentsContents.........................................................................8...................................................................8.............................................................8SYMBOLS.............................................................9toFollowTroubleDiagnoses............................9DESCRIPTION......................................................9HOWTOFOLLOWTESTGROUPSINTROU-BLEDIAGNOSES...............................................10REFERENCEINFORMATION.............................11KEYTOSYMBOLSSIGNIFYINGMEASURE-MENTSORPROCEDURES................................11toReadWiringDiagrams...............................12CONNECTORSYMBOLS...................................12SAMPLE/WIRINGDIAGRAM-EXAMPL-.........14DESCRIPTION....................................................15.........................................................20 SERVICE INFORMATION FOR ELECTRICAL INCIDENT ........................................................................22 How to Check Terminal ...........................................22 CONNECTOR AND TERMINAL PIN KIT ............22 HOW TO PROBE CONNECTORS ......................22 How to Perform Efficient Diagnosis for an Electrical Incident ControlCIRCUITINCIDENTWORK...................................................................25FLOW......................................................25SIMULATIONTESTS........................25INSPECTION.......................................28UnitsandElectricalParts...........................33PRECAUTIONS..................................................33SMJINSTALLATION...........................................34 CONSULT-II CHECKING SYSTEM ..........................35 Description ..............................................................35 Function and System Application ...........................35 Nickel Metal Hydride Battery Replacement ............35 Checking Equipment ..............................................36 CONSULT-II Start Procedure ..................................36 CONSULT-II Data Link Connector (DLC) Circuit ....37 INSPECTION PROCEDURE ..............................37 LIFTING POINT .........................................................38 Special Service Tools .............................................38 Garage Jack and Safety Stand ...............................39 2-pole Lift ................................................................40 Board-on Lift ...........................................................40 TOW TRUCK TOWING .............................................41 Tow Truck Towing ...................................................41 Vehicle Recovery (Freeing a stuck vehicle) ............41 TIGHTENING TORQUE OF STANDARD BOLTS ....42 Tightening Torque Table .........................................42 RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS ...............................................................43 Recommended Chemical Products and Sealants...43 IDENTIFICATION INFORMATION ............................44 Model Variation MANUALAUTOMATICENGINEIDENTIFICATIONIDENTIFICATION.......................................................44NUMBER...............................45PLATE...................................46SERIALNUMBER................................46TRANSAXLENUMBER................46TRANSAXLENUMBER.......................47
Description EAS000W2
WARNING: ● To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer.
● Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the SRS section.
● Before jacking up the vehicle, apply wheel chocks or other tire blocks to the wheels to prevent the vehicle from moving. After jacking up the vehicle, support the vehicle weight with safety stands at the points designated for proper lifting before working on the vehicle. These operations should be done on a level surface.
GIMGDCEFHIJKLB
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”
PRECAUTIONS
PRECAUTIONSGI-3
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. Information necessary to service the system safely is included in the SRS and SB section of this Service Manual.
General Precautions EAS000W4
SGI231SGI285
EAS000W3
● When removing a heavy component such as the engine or transaxle/transmission, be careful not to lose your balance and drop them. Also, do not allow them to strike adjacent parts, especially the brake tubes and master cylinder.
● Do not operate the engine for an extended period of time without proper exhaust ventilation. Keep the work area well ventilated and free of any inflammable materials. Special care should be taken when handling any inflammable or poisonous materials, such as gasoline, refrigerant gas, etc. When working in a pit or other enclosed area, be sure to properly ventilate the area before working with hazardous materials. Do not smoke while working on the vehicle.
Observe the following precautions to ensure safe and proper servicing. These precautions are not described in each individual section.
● Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors.
Revision: May 2004 2004 Altima
PFP:00001
● Use approved bonding agent, sealants or their equivalents when required.
● Clean all disassembled parts in the designated liquid or solvent prior to inspection or assembly.
● Use hand tools, power tools (disassembly only) and recommended special tools where specified for safe and efficient service repairs.
● Before starting repairs which do not require battery power: Turn off ignition switch. Disconnect the negative battery terminal.
PRECAUTIONSGI-4Revision: May 2004 2004 Altima
● Do not touch the terminals of electrical components which use microcomputers (such as ECM). Static electricity may damage internal electronic components.
● Replace oil seals, gaskets, packings, O-rings, locking washers, cotter pins, self-locking nuts, etc. with new ones.
● Dispose of drained oil or the solvent used for cleaning parts in an appropriate manner.
● Replace inner and outer races of tapered roller bearings and needle bearings as a set.
● To prevent serious burns: Avoid contact with hot metal parts. Do not remove the radiator cap when the engine is hot.
● Do not attempt to top off the fuel tank after the fuel pump nozzle shuts off Continuedautomatically.refuelingmay cause fuel overflow, resulting in fuel spray and possibly a fire.
● If the battery terminals are disconnected, recorded memory of radio and each control unit is erased.
● Use only the fluids and lubricants specified in this manual.
● After disconnecting vacuum or air hoses, attach a tag to indicate the proper connection.
● Arrange the disassembled parts in accordance with their assembled locations and sequence.
● Before servicing the vehicle: Protect fenders, upholstery and carpeting with appropriate covTakeers. caution that keys, buckles or buttons do not scratch paint.
● When repairing the fuel, oil, water, vacuum or exhaust systems, check all affected lines for leaks.
SGI234PBIC0190ESGI233SEF289H
If a large amount of unburned fuel flows into the catalyst, the catalyst temperature will be excessively high. To prevent this, follow the instructions.
● Before disconnecting pressurized fuel line from fuel pump to injectors, be sure to release fuel pressure.
EAS000W7
Precautions for Fuel (Unleaded Premium Gasoline Required) EAS000W6
● have the fuel tank filled only partially with unleaded regular gasoline, and fill up with unleaded premium gasoline as soon as possible.
● Be careful not to jar components such as ECM and mass air flow sensor.
connectors which are related to the engine control system and TCM (transmission control module) system. The connectors should be disconnected only when working according to the WORK FLOW of TROUBLE DIAGNOSES in EC and AT sections.
● Before connecting or disconnecting any harness connector for the multiport fuel injection system or ECM: Turn ignition switch to “OFF” position. Disconnect negative battery terminal. Otherwise, there may be damage to ECM.
SGI787
Revision: May 2004 2004 Altima
● Use unleaded gasoline only. Leaded gasoline will seriously damage the three way catalyst.
GIMGDCEFHIJKLB
Precautions for Three Way Catalyst
● When checking for ignition spark or measuring engine compression, make tests quickly and only when necessary.
ToWARNING:prevent ECM from storing the diagnostic trouble codes, do not carelessly disconnect the harness
● avoid full throttle driving and abrupt acceleration.
However, for maximum vehicle performance, the use of unleaded premium gasoline is recommended.
DoCAUTION:notuse leaded gasoline. Using leaded gasoline will damage the three way catalyst. Using a fuel other than that specified could adversely affect the emission control devices and systems, and could also affect the warranty coverage validity.
● Do not run engine when the fuel tank level is low, otherwise the engine may misfire, causing damage to the catalyst. Do not place the vehicle on flammable material. Keep flammable material off the exhaust pipe and the three way catalyst.
Precautions for Multiport Fuel Injection System or Engine Control System
Use unleaded premium gasoline with an octane rating of at least 91 AKI (Anti-Knock Index) number (Research octane number 96). If unleaded premium gasoline is not available, unleaded regular gasoline with an octane rating of at least 87 AKI number (Research octane number 91) can be used, but only under the following precautions:
PRECAUTIONSGI-5
EAS000W5