Diagnostic Troubleshooting Strategy

2012 Mitsubishi Lancer RalliartSECTION Diagnostic Troubleshooting Strategy

Use these steps to plan your diagnostic strategy. If you follow them carefully, you will check most of the possible causes of an cruise control system malfunction.

  1. Gather information from the customer.
  2. Verify that the condition described by the customer exists.
  3. Check the vehicle for any cruise control system DTC (Refer to , HOW TO READ DIAGNOSTIC TROUBLE CODESΒ .)
  4. If you can verify the condition but no cruise control system DTCs are set, the malfunction may be intermittent (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS .)
  5. If you can verify the condition but there are no cruise control system DTCs, find the fault (Refer to , SYMPTOM CHARTΒ .)
  6. If there is an cruise control system DTC, record the number of the code, then erase the code (Refer to , HOW TO ERASE DIAGNOSTIC TROUBLE CODESΒ .)
  7. Re-create the cruise control system DTC set conditions to see if the same cruise control system DTC will set again (Refer to , HOW TO READ DIAGNOSTIC TROUBLE CODESΒ .)
  • If the same cruise control system DTC sets again, perform the diagnostic procedures for the set code (Refer to , DIAGNOSTIC TROUBLE CODE CHARTΒ .)
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.