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Home >> Cadillac >> 2003 >> Seville SLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0418: Secondary Air Injection Pump Relay Control Circuit >> Test Description

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 6

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

  2. 7

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

  3. 8

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