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Home >> Chevrolet >> 2011 >> Chevy Express G2500, Van Cargo Extended, 6.6 L >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.6L (LGH) - DTC P0016 Through DTC P11DC >> Diagnostic Information and Procedures >> DTC P1082 >> Testing >> Circuit/System Testing

Circuit/System Testing

  1. Install the CH-48027 to the fuel system service port on the right front side of the engine. Verify the CH-48027 displays 0 in Hg.
  2. Ignition OFF, disconnect the harness connector at the B181 fuel filter pressure switch.
  3. Test for less than 10 Ω between the B181 fuel filter pressure switch terminal A and terminal B.
    • If greater than the specified value, replace the B181 fuel filter pressure switch.
  4. Test for less than 5 Ω between the low reference circuit terminal B and ground.
    • If greater than the specified value, repair the open or high resistance in the low reference circuit.
  5. Ignition ON, verify the scan tool Fuel Pressure Switch parameter displays High Pressure.
    • If other than the specified value, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the K20 engine control module.
  6. Install a 3 A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Fuel Filer Pressure Switch parameter displays Normal.
    • If other than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 engine control module.
    • If all circuits test normal, refer to Diagnostic Aids above.
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