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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B144B: Run/Crank Power Relay Circuit >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON.
  2. Verify the appropriate devices controlled by the KR73 Ignition Main Relay turn ON and OFF when commanding the Run/Crank Relay On and Off with a scan tool.
    • If the devices do not turn ON and OFF 

      Refer to Circuit/System Testing.

    • If the devices turn ON and OFF 
  3. All OK.
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