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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Controls/Fuel - 5.3L, 6.0L, 6.2L - DTC P0420 To DTC P3449 And Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P2534 (Fuel Pump Control Module) >> Circuit/System Testing
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Circuit/System Testing

  1. Verify that DTC P0562 is not set.
  2. Ignition OFF, disconnect the harness connector of the K27 fuel pump control module.
  3. Ignition ON, test for greater than 11 V between the IGN voltage circuit terminal 15 and ground.
    • If less than the specified voltage, test the IGN voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the MISC IGN fuse is open, test the voltage circuit for a short to ground. If the circuit tests normal, test or replace the Run/Crank relay.
  4. If all circuits test normal, replace the K27 fuel pump control module.
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