Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Hummer >> 2010 >> H3 Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 69 (Engine Control System & Fuel System - 5.3L - DTC P0010 To DTC P0232/P025A) >> DTC P0230 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 GMC Canyon and 2010 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the FPCM.
  2. Install a test lamp between the fuel pump control circuit terminal 13 and ground. Verify the test lamp turns ON and OFF as the ignition is turned ON.
    • If the test lamp does not illuminate, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the ECM.
  3. Ignition ON, verify that a test lamp does not stay illuminated between the fuel pump control circuit terminal 13 and ground.
    • If the test lamp stays illuminated, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  4. If all circuits test normal, test or replace the FPCM.
scientia non olet · About Mike's Workshop Manuals