Buick Encore: 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
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NOISY WHEN COASTING
Noisy When Coasting
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INTERMITTENT NOISE
Intermittent Noise
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CONSTANT NOISE
Constant Noise
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TRANSFER CASE LEAK DIAGNOSIS
Transfer Case Leak Diagnosis
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Repair instructions - on vehicle
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
SEE MORE:
OnStar Overview
Voice Command Button
Blue OnStar Button
Red Emergency Button
This vehicle may be equipped with a
comprehensive, in-vehicle system
that can connect to an OnStar
Advisor for Emergency, Security,
Navigation, Connections, and
Diagnostics Services. OnStar
services may require a paid service
plan and
Malfunction Indicator Lamp (Check Engine Light - Capless)
This light is part of the vehicle's
emission control on-board
diagnostic system. If this light is on
while the engine is running, a
malfunction has been detected and
the vehicle may require service. The
light should come on to show that it
is working when the ignition is in
Service Mode. See Ignitio
