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Home >> Chevrolet >> 2017 >> SS Automatic Trans >> Repair and Diagnosis (Single Page) >> Body & Frame >> Ignition Switch/Steering Lock >> Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC B144B: Run/Crank Power Relay Circuit >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. 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 turn ON and OFF 

      Refer to Circuit/System Testing.

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