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Strategy Based Diagnosis: Notes

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

The goal of Strategy Based Diagnosis is to provide guidance when you create a plan of action for each specific diagnostic situation. Following a similar plan for each diagnostic situation, you will achieve maximum efficiency when you diagnose and repair vehicles. Although each of the Strategy Based Diagnosis steps are numbered, you are not required to complete every step in order to successfully diagnose a customer concern. The first step of your diagnostic process should always be Understand and Verify the Customer's Concern. The final step of your diagnostic process should be to Repair and verify the Fix. Refer to the steps listed below for the correct Strategy Based Diagnosis.

NOTE: For additional information on the following steps refer to the corresponding numbered paragraphs listed below.
  1. Understand and verify the customers concern.
  2. Verify the vehicle is not operating as designed:
    • If the vehicle is operating as designed review the suggestions listed below: 
    • Check Identical Vehicle
    • Customer Misunderstanding of System - Explain operation to customer or refer to owners or service manual
    • Customer dissatisfaction - Submit a Field Product Report
    • If the vehicle is not operating as designed 
  3. Perform preliminary checks - Visual inspections and operational
    • If the customers concern is found, refer to step 7 
    • If the customers concern is not found 
  4. Perform the Diagnostic System Check - Vehicle, determine the diagnostic service category to perform.
    • If the customers concern is found, refer to step 7 
    • If the customers concern is not found 
  5. Check for related Bulletins, Recalls and Preliminary Information.
    • If the customers concern is found, refer to step 7 
    • If the customers concern is not found 
  6. Follow the diagnostic path listed below:
    1. Current DTC - Follow DTC Diagnostics
    2. Symptom no DTC - Follow Symptom Diagnostics
    3. No published diagnostic - Analyze and develop diagnostics or call Technical Assistance
    4. Intermittent/History DTC - See diagnostic detail below
  7. Isolate the root cause then repair and verify the fix.
  8. Re-examine the concern.
    • If the vehicle is not repaired, refer to step 1 
    • If the vehicle is repaired 
  9. All OK.
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