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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 2.4L - DTC P0628 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2440: Secondary Air Injection System Cut-Off Valve Stuck Open >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.

Relay Test

  1. Ignition OFF, disconnect the KR26 Secondary Air Injection Solenoid Valve Relay.
  2. Test for 70-110Ω between terminals 85-86.
    • If less than 70Ω or greater than 110Ω 

      Replace the KR26 Secondary Air Injection Solenoid Valve Relay.

    • If between 70-110Ω 
  3. Test for infinite resistance between the terminals listed below:
    • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    • If less than infinite resistance 

      Replace the KR26 Secondary Air Injection Solenoid Valve Relay.

    • If infinite resistance 
  4. Install a 15A fused jumper wire between relay terminal 85 and 12V. Install a jumper wire between relay terminal 86 and ground.
  5. Test for less than 2Ω between terminals 30 and 87.
    • If 2Ω or greater 

      Replace the KR26 Secondary Air Injection Solenoid Valve Relay.

    • If less than 2Ω 
  6. All OK