LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2010 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System & Fuel System - 5.3L, 6.0L, 6.2L - DTC P0010 To DTC P0231/P025A >> DTC P0230 (Without LY6) >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

  1. With the ignition OFF, disconnect the harness connector at the FPCM.
  2. With the ignition ON, engine OFF, probe the control circuit of the fuel pump control module terminal 13 with a test lamp that is connected to a good ground. Command the fuel pump ON and OFF with a scan tool. The test lamp should turn ON and OFF with each command.
    • If the test lamp does not turn ON and OFF, test for an open, high resistance, or a short to ground in the fuel pump control circuit, an intermittent or a poor connection at the ECM. If the circuit tests normal, replace the ECM.
    • If the test lamp remains illuminated with each command, test for a short to voltage in the control circuit of the fuel pump control module or an intermittent or a poor connection at the ECM. If the circuit tests normal, replace the ECM.
  3. If all circuits test normal, replace the FPCM.
scientia non olet · About LEMON Manuals