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Home › Chevrolet › 2010 › Traverse LS, AWD › Repair and Diagnosis › Engine Performance › System › Engine Control System & Fuel System - 3.6L - DTC P0192 To DTC P0629/P062B › DTC P0627-P0629 › Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the K27 fuel pump control module harness connector.
  2. Connect a test lamp between the enable circuit terminal 13 of the fuel pump control module and ground.
  3. Ignition ON, command the fuel pump ON and OFF with a scan tool. The test lamp should turn ON and OFF as commanded.
    • If the test lamp remains OFF all the time, test for a short to ground or an open/high resistance on the enable circuit. If the circuit/connections test normal, replace the K20 ECM.
    • If the test lamp remains ON all the time, test for a short to voltage on the enable circuit. If the circuit/connections test normal, replace the K20 ECM.
  4. Ignition ON, test for 2-3 V on the enable circuit terminal 13 of the fuel pump control module.
    • If not within the specified range, replace the K20 ECM.
  5. If all circuits/connections test normal, replace the K27 fuel pump control module.
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