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Home >> Chevrolet >> 2009 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 74 (Engine Control System & Fuel System - 3.6L - DTC P0192 To DTC P0629/P062B) >> DTC P0627-P0629 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 Saturn Outlook, 2010 GMC Acadia, 2010 Chevrolet Traverse, and 2010 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  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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