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Home >> Chevrolet >> 2003 >> Corvette Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics >> Diagnostic Tests >> DTC P0418: Air Pump Relay Control Circuit >> Test Description

Test Description

The numbers below refer to the step numbers in the diagnostic procedures.

  1. 5

    This step tests for voltage at the coil side of the relay.

  2. 6

    This step verifies that the PCM is providing ground to the AIR pump relay.

  3. 7

    This step tests if a ground is constantly being applied to the AIR pump relay.
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