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Home >> Chevrolet >> 2005 >> Aveo Base, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Automatic Transmission - Introduction (Diagnostic Information & Procedures)) >> Diagnostic Information and Procedures >> Diagnostic System Check - Automatic Transmission >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different variant/trim than selected.
IMPORTANT:
  • Do not clear the DTC unless directed by a diagnostic procedure. Clearing the DTC will erase all Freeze Frame/Failure Records stored in engine control module (ECM) memory.
  • Poor engine performance can sometimes be mis-diagnosed as a transmission concern. In order to avoid unnecessary transmission work, always perform:

    Diagnostic System Check - Engine Controls in Engine Controls - 1.6L

  • Use a scan tool that is known to function correctly. If necessary, test the scan tool on another vehicle.
  • Ensure the scan tool contains the most current file available.
  • The scan tool will display a loss of communication error message under the following conditions:
    • Engine control module (ECM) power is interrupted.
    • The ignition switch is turned OFF.
    • The battery voltage level is very low.
    • A poor connection at the diagnostic link connector (DLC)
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