Normal Operation

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)