Buick Enclave: Engine Performance Diagnostic Routine Outline
* PLEASE READ THIS FIRST *
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:
SCHEMATIC WIRING DIAGRAMS
SHIFT LOCK CONTROL WIRING SCHEMATICS
Shift Lock Control System
Fig. 1: Shift Lock Wiring Schematic
DIAGNOSTIC INFORMATION AND PROCEDURES
DIAGNOSTIC CODE INDEX
DTC B2705: GE
SEE MORE:
Notice: To avoid damage, the disabled vehicle should be towed with all four
wheels off the ground. Care must be taken with vehicles that have low ground clearance
and/or special equipment. Always flatbed on a car carrier.
Consult your dealer or a professional towing service if the disabled vehi
At Each Fuel Stop
► Check the engine oil level.
See Engine Oil .
Once a Month
► Check the tire inflation pressures. See Tire Pressure .
► Inspect the tires for wear.
See Tire Inspection .
► Check the windshield washer fluid level. See Washer Fluid .
Engine Oil Change
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