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Home >> Chevrolet >> 2015 >> Volt >> Repair and Diagnosis (Single Page) >> Steering >> Steering Wheel And Steering Column >> Diagnostic Information and Procedures >> DTC B144C: Inverted Run/Start Power Relay >> Component Testing >> Relay Test

Relay Test

  1. Vehicle OFF, disconnect the KR73 RUN/CRNK relay.
  2. Test for 60-200 Ω between terminals 85 and 86.
    • If not within the specified range, replace the KR73 RUN/CRNK relay.
  3. Test for infinite resistance between the following terminals:
    • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    • If not the specified value, replace the KR73 RUN/CRNK relay.
  4. Test for less than 2 Ω between terminals 30 and 87A.
    • If greater than the specified range, replace the KR73 RUN/CRNK relay.
  5. Install a 3 A fused jumper wire between the relay terminal 85 and 12 V. Install a jumper wire between the relay terminal 86 and ground. Test for less than 2 Ω between terminals 30 and 87.
    • If greater than specified range, replace the KR73 RUN/CRNK relay.
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