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Home >> Chevrolet >> 2017 >> SS Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls And Fuel - 6.2L (LS3) - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P0230: Fuel Pump Control Output Circuit >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the K38 Chassis Control Module. It may take up to 2 min for all vehicle systems to power down.
  2. Connect a test lamp between the fuel pump control circuit terminal and ground.
    3. NOTE:

    Voltage is supplied once per ignition cycle for approximately 2 s at the time of ignition ON.

  3. Verify the test lamp turns ON and OFF as the ignition is turned ON.
    • If the test lamp does not turn ON and OFF 
    1. Ignition OFF, remove the test lamp, disconnect the harness connector X1 at the K20 Engine Control Module.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, replace the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit
      • If less than 2 Ω, replace the K20 Engine Control Module.
    • If the test lamp stays ON 
    1. Ignition OFF, remove the test lamp, disconnect the harness connector X1 at the K20 Engine Control Module, ignition ON.
    2. Test for less than 1 V between the control circuit and ground.
    • If 1 V or greater, repair the short to voltage on the circuit.
    • If less than 1 V, replace the K20 Engine Control Module.
    • If test lamp turns ON and OFF 
  4. Test or replace the K38 Chassis Control Module.
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