Buick Encore Owners & Service Manuals

Buick Encore: Diagnostic information and procedures

Buick Encore 2012-2019 Service Manual / Transmission / Transfer Case - AAM / Diagnostic information and procedures

SYMPTOMS - TRANSFER CASE

Strategy Based Diagnostics

Review the system operations in order to familiarize yourself with the system functions. Refer to Transfer Case Disassembled View, Transfer Case Description and Operation, and Rear Drive Axle Description and Operation , . All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system condition. The diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to Strategy Based Diagnosis .

Visual/Physical Inspection

  • Inspect for aftermarket devices, which could affect the operation of the vehicle. Refer to Checking Aftermarket Accessories .
  • Inspect the easily accessible or visible system components for obvious damage or conditions, which could cause the symptom.
  • Inspect for the correct lubricant levels and the proper viscosities.
  • Verify the exact operating conditions under which the concern exists. Note factors such as vehicle speed, road conditions, ambient temperature, and other specifics.
  • Compare the driving characteristics or sounds, if applicable, to a known good vehicle and ensure you are not trying to correct a normal condition.

Intermittent

Test the vehicle under the same conditions that the customer reported in order to verify the system is operating properly.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

  • Diagnostic System Check - Vehicle .
  • Noisy in Drive.
  • Noisy When Coasting.
  • Intermittent Noise.
  • Constant Noise.
  • Transfer Case Leak Diagnosis.

NOISY IN DRIVE

Noisy in Drive

Noisy in Drive

Noisy in Drive

NOISY WHEN COASTING

Noisy When Coasting

Noisy When Coasting

Noisy When Coasting

INTERMITTENT NOISE

Intermittent Noise

CONSTANT NOISE

Constant Noise

Constant Noise

Constant Noise

TRANSFER CASE LEAK DIAGNOSIS

Transfer Case Leak Diagnosis

Transfer Case Leak Diagnosis

Transfer Case Leak Diagnosis

Transfer Case Leak Diagnosis

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    Transfer case fluid replacement Removal Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Place a suitable drain pan under the transfer case. Fig. 2: Transfer

     Repair instructions - off vehicle

    Transfer case adapter disassemble (MHB) Fig. 40: Transfer Case Adapter (MHB) Transfer Case Adapter Disassemble (MHB) TRANSFER CASE ADAPTER DISASSEMBLE (M7Y, MZ4) Fig. 41: Transfer Case Adapter

     Description and operation

    Transfer case identification Fig. 71: Transfer Case Primary Identification Label The transfer case primary identification label (1) is located on the rear extension housing. The transfer case secon

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     Folding Seatback

    The front passenger seatback folds flat. Warning If you fold the seatback forward to carry longer objects, such as skis, be sure any such cargo is not near an airbag. In a crash, an inflating airbag might force that object toward a person. This could cause severe injury or even death. Secure objects

     Fasteners

    Metric Fasteners This vehicle provides fastener dimensions using the metric system. Most metric fasteners are approximate in diameter to equivalent English fasteners. Make replacements using fasteners of the same nominal diameter, thread pitch, and strength. A number marking identifies the OE met

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