LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2006 >> DTS 4.6 9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.6L - DTC P0403 To P1381 >> DTC P0650 >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

  1. With the ignition ON, and the ECM harness disconnected, the MIL should be OFF.
    • If the MIL remains ON, test the MIL control circuit for a short to ground. If the circuit test normal, replace the IPC.
  2. With the ignition ON, the ECM harness disconnected, connect a fused 3-amp jumper wire to the MIL control circuit. Connecting and disconnecting the other end of the fused jumper wire to a ground will allow the MIL to turn ON and OFF.
    • If the MIL turns ON and OFF when the jumper is connected and disconnected from a ground, replace the ECM.
    • If the fuse in the 3-amp fused jumper opens, test the MIL control circuit for a short to voltage.
    • If the MIL does not illuminate, test the MIL control and the MIL supply voltage circuits for an open. If the circuits test normal, replace the IPC.
scientia non olet · About LEMON Manuals