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Home >> Chevrolet >> 2011 >> Traverse LS, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.6L - DTC P0351 Through DTC P2636 And Troubleshooting >> Diagnostic Information and Procedures >> DTC P0627-P0629 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the K27 fuel pump control module harness connector.
  2. Ignition OFF, and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for 0 V on the enable circuit terminal 13 of the fuel pump control module.
    • If greater than the specified value, test for a short to voltage on the enable circuit. If the circuit/connections test normal, replace the K20 ECM.
  3. Ignition ON, command the fuel pump ON with a scan tool. Test for B+ on the enable circuit terminal 13 of the fuel pump control module.
    • If less than the specified range, 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.
  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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