LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 66 (Automatic Transmission Diagnosis - 4L80-E (Gasoline)) >> Self-Diagnostic System >> Diagnostic System Check >> Test Description

Test Description

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

The numbers listed below refer to step numbers in the diagnostic procedure:

  1. 1

    This step determines if the scan tool is receiving power through the DLC connector.

  2. 2

    The MIL should illuminate whenever the ignition is on and the engine is not running.

  3. 3

    This step determines if the PCM is transmitting class 2 serial data to the DLC and that the class 2 data circuit is not open or shorted.

  4. 4

    This step determines if a DTC is current or stored in history.

scientia non olet · About LEMON Manuals