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Home >> Chevrolet >> 2010 >> Impala Police >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls And Fuel - 3.5L - DTC P0341 - DTC P2544) >> DTC P0412 or P0418 >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the appropriate relay.
  2. Test for the following resistance between terminals 85 and 86.
    • 50-75 Ω-Secondary Air Injection Pump Relay
    • 70-110 Ω-Secondary Air Injection Solenoid Relay
    • If the resistance is not within the specified range, replace the relay.
  3. Test for infinite resistance between the following terminals:
    • 86 and 87
    • 86 and 30
    • 85 and 87
    • 87 and 30
    • If not the specified value, replace the relay.
  4. Install a 15 A fused jumper wire between relay terminal 86 and B+. Install a jumper wire between relay terminal 85 and ground. Test for less than 2 Ω between terminals 87 and 30.
    • If greater than the specified range, replace the relay.