Test Procedure

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The Advance Trac®/IVD lamp will flash when a system calibration is required. Calibration is required after certain DTCs are cleared.

R1 - CHECK FOR DTCs
- Connect the diagnostic tool.
- Key in ON position.
- Retrieve DTCs.
- Is any other DTC retrieved with C1998?
  1. Yes : GO to the appropriate pinpoint test for the DTC.
    Some of the pinpoint tests recommend IVD calibration prior to any further diagnostics, in this case, GO to R2.
  2. No : GO to R2.

R2 - IVD CALIBRATION
- Connect the diagnostic tool.
- Key on, engine running.
- Carry out IVD calibration per the diagnostic tool instructions.
- Did calibration complete for all IVD sensors? And did the Advance Trac®/IVD lamp stop flashing and go off?
  1. Yes : GO to R3.
  2. No : GO to R1.
    Some concerns will cause a calibration not complete. If sent here from another pinpoint test, return to that pinpoint test for further diagnostics.

NOTE: You must clear DTC C1998 after the completion of the calibration.

R3 - CLEAR DTC C1998
- Connect the diagnostic tool.
- Key in ON position.
- Clear the DTC.
- Did the DTC clear?
  1. Yes : TEST DRIVE the vehicle. REPEAT the self-test.
    If sent here from another pinpoint test, return to that pinpoint test for further diagnostics.
  2. No : GO to R1.