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Home >> Saab >> 2009 >> 9-7X 4.2i >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.2L - DTC P0366 To DTC P2544 >> DTC P0650 >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition ON, verify that the IPC warning indicators are illuminated.
    • If the IPC warning indicators are not illuminated, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, replace the IPC.
  2. Ignition OFF, disconnect ECM X1 harness connector. Ignition ON, the MIL should not illuminate.
    • If the MIL is illuminated, test the MIL control circuit terminal listed below for a short to ground. If the circuit tests normal, replace the IPC.
      • ECM terminal X1-27 for RPO LE5
      • ECM terminal X1-12 for RPO LAT
  3. Ignition ON, connect a 3A fused jumper wire between the MIL control circuit terminal listed below and ground. The MIL should illuminate.
    • ECM terminal X1-27 for RPO LE5
    • ECM terminal X1-12 for RPO LAT
    • If the MIL does not illuminate, test the MIL control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC/bulb.
  4. If all circuits/connections test normal, replace the ECM.
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