Description
This article explains "Removal, Disassembly, Installation, Inspection and Adjustment" and "Trouble Diagnoses".
Relation between Illustrations and Descriptions
The following sample explains the relationship between the part description in an illustration, the part name in the text and the service procedures.
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Note. Trouble diagnoses indicate work procedures required to diagnose problems effectively. Observe the following instructions before diagnosing. Before performing trouble diagnoses, read the "Work Flow" in each article. After repairs, re-check that the problem has been completely eliminated. Refer to Component Parts and Harness Connector Location for the Systems described in each article for identification/location of components and harness connectors. When checking circuit continuity, ignition switch should be OFF. Refer to the Circuit Diagram for quick pinpoint check. If you need to check circuit continuity between harness connectors in more detail, such as when a sub-harness is used, refer to WIRING DIAGRAM in each individual article and HARNESS LAYOUT for identification of harness connectors. Before checking voltage at connectors, check battery voltage. After accomplishing the Diagnosis Procedures and Electrical Components Inspection, make sure that all harness connectors are reconnected as they were.
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- Test group number and test group title Test group number and test group title are shown in the upper portion of each test group.
- Work and diagnosis procedure Start to diagnose a problem using procedures indicated in enclosed test groups.
- Questions and results Questions and required results are indicated in test group.
- Action Next action for each test group is indicated based on result of each question.
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| Number | Item | Description |
|---|---|---|
| 1 | Power supply | This means the power supply of fusible link or fuse. |
| 2 | Fusible link | "X" means the fusible link. |
| 3 | Number of fusible link/fuse | This means the number of fusible link or fuse location. |
| 4 | Fuse | "/" means the fuse. |
| 5 | Current rating of fusible link/fuse | This means the current rating of the fusible link or fuse. |
| 6 | Optional splice | The open circle shows that the splice is optional depending on vehicle application. |
| 7 | Connector number | The letter shows which harness the connector is located in. Example "M": main harness. For detail and to locate the connector, refer to " ELECTRICAL UNITS LOCATION ", " HARNESS LAYOUT ". |
| 8 | Splice | The shaded circle "•" means the splice. |
| 9 | Page crossing | This circuit continues to an adjacent article. |
| 10 | Option abbreviation | This means the vehicle specifications which layouts the circuit between "o". |
| 11 | Relay | This shows an internal representation of the relay. |
| 12 | Option description | This shows a description of the option abbreviation used on the article. |
| 13 | Switch | This shows that continuity exists between terminals 1 and 2 when the switch is in the A position. Continuity exists between terminals 1 and 3 when the switch is in the B position. |
| 14 | Circuit (Wiring) | This means the wiring. |
| 15 | System branch | This shows that the circuit is branched to other systems. |
| 16 | Shielded line | The line enclosed by broken line circle shows shield wire. |
| 17 | Component name | This shows the name of a component. |
| 18 | Ground (GND) | This shows the ground connection. |
| 19 | Connector | This means the connector information. This unit-side is described by the connector symbols. |
| 20 | Connectors | This means that a transmission line bypasses two connectors or more. |
| 21 | Wire color | This shows a code for the color of the wire. |
| B = Black W = White R = Red G = Green L = Blue Y = Yellow LG = Light Green LB = Light Blue BR = Brown OR or O = Orange P = Pink PU or V (Violet) = Purple GY or GR = Gray SB = Sky Blue CH = Dark Brown DG = Dark Green | ||
| When the wire color is striped, the base color is given first, followed by the stripe color as shown below: Example: L/W = Blue with White Stripe | ||
| 22 | Terminal number | This means the terminal number of a connector. |
Abbreviation List
The following ABBREVIATIONS are used
| ABBREVIATION | DESCRIPTION |
|---|---|
| A/C | Air Conditioner |
| A/T | Automatic Transaxle/Transmission |
| ATF | Automatic Transmission Fluid |
| AWD | All wheel drive |
| D1 | Drive range [First Gear (1GR)] |
| D2 | Drive range [Second Gear (2GR)] |
| D3 | Drive range [Third Gear (3GR)] |
| D4 | Drive range [Fourth Gear (4GR)] |
| FR, RR | Front, Rear |
| LH, RH | Left-Hand, Right-Hand |
| OD | Overdrive |
| P/S | Power Steering |
| SAE | Society of Automotive Engineers, Inc. |
| SDS | Service Data and Specifications |
| SST | Special Service Tools |
| 2WD | 2-Wheel Drive |
| 4WD | 4-Wheel Drive |
| 1GR | First Gear |
| 2GR | Second Gear |
| 3GR | Third Gear |
| 4GR | Fourth Gear |
| 5GR | Fifth Gear |
| 2 2 | 2nd range [Second Gear (2GR)] |
| 2 1 | 2nd range [First Gear (1GR)] |
| 1 2 | 1st range [Second Gear (2GR)] |
| 1 1 | 1st range [First Gear (1GR)] |
VEHICLE IDENTIFICATION NUMBER ARRANGEMENT
| Position | Character | Qualifier | Definition |
|---|---|---|---|
| 1 | 5N1 | Manufacturer | 5N1: USA produced multi-purpose vehicle |
| 2 | |||
| 3 | |||
| 4 | A | Engine type | A: VQ40DE B: VK56DE |
| 5 | R1 | Model code | R1: R51 NISSAN Pathfinder |
| 6 | |||
| 7 | N | Body type | N: 4 Door wagon |
| 8 | B | Gross vehicle weight rating | B: 4WD, 4-wheel ABS, Class E, with curtain side air bags |
| N: 2WD, 4-wheel ABS, Class D, with curtain side air bags | |||
| 7: 2WD, 4-wheel ABS, Class D, without curtain side air bags | |||
| 8: 4WD, 4-wheel ABS, Class E, without curtain side air bags | |||
| 9 | * | Check digit | (0 to 9 or X) The code for the check digit is determined by a mathematical computation. |
| 10 | C | Model year | C: 2012 |
| 11 | C | Manufacturing plant | C: Smyrna, Tennessee |
| 12 | XXXXXX | Vehicle serial number | Chassis number |
| 13 | |||
| 14 | |||
| 15 | |||
| 16 | |||
| 17 |
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Observe the following precautions to ensure safe and proper servicing. These precautions are not described in each individual article .
OPERATION PROCEDURE
- Connect both battery cables. NOTE: Supply power using jumper cables if battery is discharged.
- Use the Intelligent Key or mechanical key to turn the ignition switch to the "ACC" position. At this time, the steering lock will be released.
- Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
- Perform the necessary repair operation.
- When the repair work is completed, return the ignition switch to the "LOCK" position before connecting the battery cables. (At this time, the steering lock mechanism will engage.)
- Perform a self-diagnosis check of all control units using CONSULT.
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- 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.
- 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.
- 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.
- Before starting repairs which do not require battery power: Turn off ignition switch. Disconnect the negative battery terminal.
- If the battery terminals are disconnected, recorded memory of radio and each control unit is erased.
- To prevent serious burns: Avoid contact with hot metal parts. Do not remove the radiator cap when the engine is hot.
- Dispose of drained oil or the solvent used for cleaning parts in an appropriate manner.
- Do not attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically. Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire.
- Clean all disassembled parts in the designated liquid or solvent prior to inspection or assembly.
- Replace oil seals, gaskets, packings, O-rings, locking washers, cotter pins, self-locking nuts, etc. with new ones.
- Replace inner and outer races of tapered roller bearings and needle bearings as a set.
- Arrange the disassembled parts in accordance with their assembled locations and sequence.
- Do not touch the terminals of electrical components which use microcomputers (such as ECM). Static electricity may damage internal electronic components.
- After disconnecting vacuum or air hoses, attach a tag to indicate the proper connection.
- Use only the fluids and lubricants specified in this service information.
- Use approved bonding agent, sealants or their equivalents when required.
- Use tools and recommended special tools where specified for safe and efficient service repairs.
- When repairing the fuel, oil, water, vacuum or exhaust systems, check all affected lines for leaks.
- Before servicing the vehicle: Protect fenders, upholstery and carpeting with appropriate covers. Take caution that keys, buckles or buttons do not scratch paint.
| WARNING | To prevent ECM from storing the diagnostic trouble codes, do not carelessly disconnect the harness 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 ENGINE CONTROL SYSTEM - VK56DE or ENGINE CONTROL SYSTEM - VQ40DE and TRANSAXLE & TRANSMISSION articles. |
Sometimes the symptom is not present when the vehicle is brought in for service. If possible, re-create the conditions present at the time of the incident. Doing so may help avoid a No Trouble Found Diagnosis. The following section illustrates ways to simulate the conditions/environment under which the owner experiences an electrical incident.
The section is broken into the six following topics
- Vehicle vibration
- Heat sensitive
- Freezing
- Water intrusion
- Electrical load
- Cold or hot start up
Get a thorough description of the incident from the customer. It is important for simulating the conditions of the problem.
- In general, testing electrical circuits is an easy task if it is approached in a logical and organized method. 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.
| OPEN | A circuit is open when there is no continuity through a section of the circuit. | |
|---|---|---|
| SHORT | There are two types of shorts. | |
| SHORT CIRCUIT | When a circuit contacts another circuit and causes the normal resistance to change. | |
| SHORT TO GROUND | When a circuit contacts a ground source and grounds the circuit. | |
Note. Refer to " HOW TO CHECK TERMINAL " to probe or check terminal.
Note. This vehicle is diagnosed using CONSULT-III plus.
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- When CONSULT is connected with a data link 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.
- Refer to CONSULT-III plus Operation Manual for more information.
