Normal Operation
WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
The ABS module must be calibrated whenever a component specific to the Electronic Stability Control (ESC) or Roll Stability Control (RSC®) system is disconnected or a new component is installed.
- DTC C1991 (Module Calibration Failure) - If the IVD Initialization sequence does not finish or if the ABS module looses the calibration information, DTC C1991 will be set.
This pinpoint test is intended to diagnose the following:
- ABS module
- Stability control sensor cluster
- Steering Angle Sensor Module (SASM)