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:
WARNING
If something is carried on top of the vehicle that is longer or wider than the
roof rack—like paneling, plywood, or a mattress—the wind can catch it while the
vehicle is being driven. The item being carried could be violently torn off, and
this could cause a collision and damage t
Buying New Tires
GM has developed and matched specific tires for the vehicle. The original equipment
tires installed were designed to meet General Motors Tire Performance Criteria Specification
(TPC Spec) system rating. When replacement tires are needed, GM strongly recommends
buying tires wit