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Home >> Chevrolet >> 2021 >> Blazer RS, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 2.0L (LSY) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P163A >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition - On/Vehicle - In Service Mode
  2. Verify no other DTCs are set.
    • Go to next step: If no other DTCs are set 
  3. Ignition - Cycle On and Off

    Verify a click can be heard or felt at the following component(s) when the scan tool control function was commanded: KR75 Engine Controls Ignition Relay

    • Go to next step: If a click can be heard or felt 
  4. Verify DTC P163A is not set.
    • If DTC P163A is set 

      Refer to: Circuit/System Testing

    • Go to next step: If DTC P163A is not set 
  5. All OK.