Nissan Sentra manuals

Nissan Sentra Service Manual: Symptom diagnosis

Squeak and rattle trouble diagnoses

Work Flow



Interview the customer if possible, to determine the conditions that exist when the noise occurs. Use the Diagnostic Worksheet during the interview to document the facts and conditions when the noise occurs and any customer's comments; refer to SE-15, "Diagnostic Worksheet". This information is necessary to duplicate the conditions that exist when the noise occurs.


If possible, drive the vehicle with the customer until the noise is duplicated. Note any additional information on the Diagnostic Worksheet regarding the conditions or location of the noise. This information can be used to duplicate the same conditions when you confirm the repair.

If the noise can be duplicated easily during the test drive, to help identify the source of the noise, try to duplicate the noise with the vehicle stopped by doing one or all of the following:

  1. Close a door
  2. Tap or push/pull around the area where the noise appears to be coming from.
  3. Rev the engine.
  4. Use a floor jack to recreate vehicle “twist”.
  5. At idle, apply engine load (electrical load, half-clutch on M/T model, drive position on CVT and A/T models).
  6. Raise the vehicle on a hoist and hit a tire with a rubber hammer.


After verifying the customer concern or symptom, check ASIST for Technical Service Bulletins (TSBs) related to that concern or symptom.

If a TSB relates to the symptom, follow the procedure to repair the noise.


  1. Narrow down the noise to a general area. To help pinpoint the source of the noise, use a listening tool (Chassis Ear: J-39570, Engine Ear: J-39565 and mechanic's stethoscope).
  2. Narrow down the noise to a more specific area and identify the cause of the noise by:



Do not use excessive force as many components are constructed of plastic and may be damaged.



Confirm that the cause of a noise is repaired by test driving the vehicle. Operate the vehicle under the same conditions as when the noise originally occurred. Refer to the notes on the Diagnostic Worksheet.

Generic Squeak and Rattle Troubleshooting

Refer to Table of Contents for specific component removal and installation information.


Most incidents are caused by contact and movement between:

  1. Cluster lid A and the instrument panel
  2. Acrylic lens and combination meter housing
  3. Instrument panel to front pillar finisher
  4. Instrument panel to windshield
  5. Instrument panel pins
  6. Wiring harnesses behind the combination meter
  7. A/C defroster duct and duct joint

These incidents can usually be located by tapping or moving the components to duplicate the noise or by pressing on the components while driving to stop the noise. Most of these incidents can be repaired by applying felt cloth tape or silicone spray (in hard to reach areas). Urethane pads can be used to insulate wiring harness.


Do not use silicone spray to isolate a squeak or rattle. If you saturate the area with silicone, you will not be able to recheck the repair.


Components to pay attention to include:

  1. Shift selector assembly cover to finisher
  2. A/C control unit and cluster lid C
  3. Wiring harnesses behind audio and A/C control unit

The instrument panel repair and isolation procedures also apply to the center console.


Pay attention to the:

  1. Finisher and inner panel making a slapping noise
  2. Inside handle escutcheon to door finisher
  3. Wiring harnesses tapping
  4. Door striker out of alignment causing a popping noise on starts and stops

Tapping or moving the components or pressing on them while driving to duplicate the conditions can isolate many of these incidents. You can usually insulate the areas with felt cloth tape or insulator foam blocks from the NISSAN Squeak and Rattle Kit (J-50397) to repair the noise.


Trunk noises are often caused by a loose jack or loose items put into the trunk by the owner.

In addition look for:

  1. Trunk lid bumpers out of adjustment
  2. Trunk lid striker out of adjustment
  3. The trunk lid torsion bars knocking together
  4. A loose license plate or bracket

Most of these incidents can be repaired by adjusting, securing or insulating the item(s) or component(s) causing the noise.


Noises in the sunroof/headlining area can often be traced to one of the following:

  1. Sunroof lid, rail, linkage or seals making a rattle or light knocking noise
  2. Sun visor shaft shaking in the holder
  3. Front or rear windshield touching headlining and squeaking

Again, pressing on the components to stop the noise while duplicating the conditions can isolate most of these incidents. Repairs usually consist of insulating with felt cloth tape.


Overhead console noises are often caused by the console panel clips not being engaged correctly. Most of these incidents are repaired by pushing up on the console at the clip locations until the clips engage.

In addition look for:

  1. Loose harness or harness connectors.
  2. Front console map/reading lamp lens loose.
  3. Loose screws at console attachment points.


When isolating seat noise it's important to note the position the seat is in and the load placed on the seat when the noise is present. These conditions should be duplicated when verifying and isolating the cause of the noise.

Cause of seat noise include:

  1. Headrest rods and holder
  2. A squeak between the seat pad cushion and frame
  3. The rear seatback lock and bracket

These noises can be isolated by moving or pressing on the suspected components while duplicating the conditions under which the noise occurs. Most of these incidents can be repaired by repositioning the component or applying urethane tape to the contact area.


Some interior noise may be caused by components under the hood or on the engine wall. The noise is then transmitted into the passenger compartment.

Causes of transmitted underhood noise include:

  1. Any component installed to the engine wall
  2. Components that pass through the engine wall
  3. Engine wall mounts and connectors
  4. Loose radiator installation pins
  5. Hood bumpers out of adjustment
  6. Hood striker out of adjustment

These noises can be difficult to isolate since they cannot be reached from the interior of the vehicle. The best method is to secure, move or insulate one component at a time and test drive the vehicle. Also, engine rpm or load can be changed to isolate the noise. Repairs can usually be made by moving, adjusting, securing, or insulating the component causing the noise.

Diagnostic Worksheet

Removal and installation

Wiring diagram
Heated seat Wiring Diagram ...

Removal and installation

Other materials:

System Diagram FRONT POWER WINDOW LH ANTI-PINCH SYSTEM System Description MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH INPUT/OUTPUT SIGNAL CHART Item Input signal to main power window and door lock/unlock switch Main power window and door lock/unlock switch function A ...

System description
Component parts Component parts location BCM (view with instrument panel removed) ECM IPDM E/R Combination meter Security indicator lamp CVT shift selector (park position switch) (view with center console removed) Stop lamp switch Push button ignition switch NATS anten ...

SRS air bag system SRS AIR BAG SYSTEM : System Diagram SRS AIR BAG SYSTEM : System Description The air bag deploys if the air bag diagnosis sensor unit is activated while the ignition switch is in the ON or START position. The collision modes for which supplemental restraint systems ...

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