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Home >> Cadillac >> 2006 >> STS Base, 3.6 7, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Control System - 4.4L - DTC P0010 To P0175) >> DTC P0120, P0122, P0123, P0220, P0222, P0223, or P2135 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition ON, observe the TP sensor 1 for a voltage parameter between 0.35-4.58 volts, with the accelerator pedal in the released position.
  2. Ignition ON, observe the TP sensor 2 for a voltage parameter between 0.35-4.597 volts, with the accelerator pedal in the released position with a scan tool.
  3. With a scan tool, observe the TP sensors 1 and 2 parameter. The scan tool should indicate Agree.
  4. Clear the DTCs with the scan tool. Operate the vehicle within the Conditions for Running the DTC, or within the conditions that you observed from the Freeze Frame/Failure Records.
  5. Ignition OFF for 60 seconds, operate the vehicle within the Conditions for Running the DTCs.
  6. Ignition ON, perform several accelerator pedal sweeps, then observe the previous TP sensor parameters and DTC information with the scan tool.
    • If DTC P0120 or P0220 is the only DTC set, and all of the previous TP sensor parameters are normal, replace the ECM.
  7. Verify that DTCs P0641 or P0651 are not set.
  8. Engine running, observe the DTC information with a scan tool. DTCs P0120, P0122, P0123, P0220, P0222, P0223, or P2135 should not set.
  9. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.