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Home >> Isuzu >> 2007 >> Ascender RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 4.2L - DTC P2119 To DTC P2A01 >> DTC P2444 >> Circuit/System Verification
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Circuit/System Verification

  1. If DTCs P0411, P0418, P2432 or P2433 are set, perform those diagnostics first.
  2. Ignition ON, observe that the AIR pump is not activated.
    • If the AIR pump is activated, test the AIR pump voltage supply circuit for a short to voltage. If the circuit tests normal, test the AIR pump relay control circuit for a short to ground. If the circuits test normal, test the relay. If the circuits and relay test normal, replace the control module.
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