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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 77 (Engine Controls Self-Diagnostics - 5.0L & 5,7L) >> Diagnostic Tests >> DTC P0410: Secondary Air Injection (Air) System >> Test Description

Test Description

WARNING: This page does not describe the selected car, but rather 6 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 below refer to the step numbers in the diagnostic procedure.

  1. 4

    This step will determine if the AIR system is functioning correctly.

  2. 18

    The engine must be running for this test to ensure a vacuum supply to the system.

  3. 20

    This step will determine if the AIR pump is capable of producing airflow.

  4. 23

    This step will determine if the PCM is capable of controlling the AIR pump relay.
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