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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - DTC P0010 To DTC P0442) >> Diagnostic Information And Procedures >> DTC P0231, P0232 Or P023F: Fuel Pump Control Circuit >> Component Testing

Component Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the K111 Fuel Pump Driver Control Module.
  2. Connect a DMM, set on diode setting, with the positive lead at terminal 16 and the negative lead at terminal 9 of the K111 Fuel Pump Driver Control Module.
  3. Verify the DMM displays between 0.4 - 0.8 V.
    • If not between 0.4 - 0.8 V 

      Replace the K111 Fuel Pump Driver Control Module.

    • Go to next step : If between 0.4 - 0.8 V 
  4. Connect a DMM, set on diode setting, with the positive lead at terminal 9 and the negative lead at terminal 16 of the K111 Fuel Pump Driver Control Module.
  5. Verify the DMM displays OL.
    • If not OL 

      Replace the K111 Fuel Pump Driver Control Module.

    • Go to next step : If OL 
  6. All OK.
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