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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Wiring Systems And Power Management - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B144B: Run/Crank Power Relay >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2016 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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