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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 150 (Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B144B: Run/Crank Power Relay Circuit >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the KR73 Ignition Main Relay and KR146 Exhaust Flow Control Valve Relay click ON and OFF when commanding the Run/Crank Relay On and Off with a scan tool.
    • If the KR73 Ignition Main Relay or KR146 Exhaust Flow Control Valve Relay do not click ON and OFF 

      Refer to Circuit/System Testing.

    • If the KR73 Ignition Main Relay and KR146 Exhaust Flow Control Valve Relay click ON and OFF 
  2. All OK.
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