Buick Encore: Engine Performance Diagnostic Routine Outline
NOTE: This article is generic in nature and all information
does not apply to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
WHERE DOES DRIVEABILITY DIAGNOSIS START?
PERFORM BASIC INSPECTION
NOTE: This article is generic in nature and all information does
not apply to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
- Verify Customer Complaint
- Check for Relevant Technical Service Bulletins (TSBs)
- Perform Visual Inspection (See Basic Diagnostic Procedures)
- Test Engine Sub-Systems (See Basic Diagnostic Procedures)
- Mechanical Condition (Compression)
- Ignition Output
- Fuel Delivery
- Check Air Induction System For Leaks
- Check & Adjust Basic Engine Settings(See On-Vehicle Adjustments)
- Ignition Timing
- Idle Speed
CHECK FOR TROUBLE CODES
NOTE: This article is generic in nature and all information does
not apply to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
- Check for Diagnostic Trouble Codes (DTCs).(See Self-Diagnostics)
- Repair cause of DTCs.
- Clear PCM memory and repeat self-test.
DIAGNOSE SYMPTOM
NOTE: This article is generic in nature and all information
does not apply to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
- If no self-diagnostics available, or no trouble codes present, identify
symptom.
- See trouble shooting procedure to identify problem. (See Trouble
Shooting - No Codes)
TEST SYSTEM
NOTE: This article is generic in nature and all information does
not apply to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
- Perform required tests. (See Systems & Component Testing)
- Verify complaint is repaired.
READ NEXT:
Always refer to Emission Decal in engine compartment before servicing
vehicle. If manual and decal
differ, always use decal specifications.
Do not allow or create a condition of misfire in more
NOTE: This is GENERAL information. This article is not intended to
be specific to any
unique situation or individual vehicle configuration. For model-specific
information see appropriate articles whe
This article is generic in nature and all information does not apply to all
vehicles including those without a
liquid cooling system. For vehicle specific information, see the appropriate
articles i
SEE MORE:
OBJECT DETECTION WIRING SCHEMATICS (ENCORE)
Lane Departure Warning (UFL)
Fig. 1: Lane Departure Warning (UFL)
Rearview Camera (UVC)
Fig. 2: Rearview Camera (UVC)
Front Sensors (UD5)
Fig. 3: Front Sensors (UD5)
Rear Sensors (UD5 or UD7)
Fig. 4: Rear Sensors (UD5 or UD7)
Side Object Detection
The cooling system allows the
engine to maintain the correct
working temperature.
Engine Cooling Fan (Out
of View)
Engine Coolant Surge Tank
and Pressure Cap
Warning
An underhood electric fan can
start up even when the engine is
not running and can cause injury.
Keep hands, clothing, and too