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Home >> GMC >> 2020 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls And Fuel - 1.5L (LYX) - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC P0089, P00C6, P228C, P228D, or P2C1E-P2C20 >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the harness connector at the G18 High Pressure Fuel Pump.
    2. NOTE:

    The DMM and test leads must be calibrated to 0 Ω in order to prevent misdiagnosis.

  2. Test for 1.09 - 1.21 Ω at 20°C (68°F) between the high control circuit terminal 2 and the low control circuit terminal 1.
    • If not between 1.09 - 1.21 Ω 

      Replace the G18 High Pressure Fuel Pump.

    • Go to next step : If between 1.09 - 1.21 Ω 
  3. Test for infinite resistance between each terminal and the G18 High Pressure Fuel Pump housing.
    • If less than infinite resistance 

      Replace the G18 High Pressure Fuel Pump.

    • Go to next step : If infinite resistance 
  4. All OK
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