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Home >> Saturn >> 2002 >> SC2 Automatic, MP7 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0418: Secondary Air Injection System Relay Circuit >> Diagnostic Aids

Diagnostic Aids

Use scan tool to monitor AIR PUMP REL. - LOW VOLT or AIR PUMP REL. - OPEN test to verify if a problem exists. This test will fail only when device is being commanded off and voltage at PCM is low. The test will update every 100 milliseconds whenever ignition is turned on and device is being commanded off through scan tool or PCM.

Air pump relay coil resistance should be 75-105 ohms.

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