Test O: DTC C1991 - Module Calibration Failure
Pinpoint Test O: DTC C1991 - Module Calibration FailureNormal Operation
The ABS module needs to be calibrated whenever a component specific to the roll stability control (RSC) system or electronic stability control (ESC) system is disconnected or a new component is installed. calibration allows the ABS module to identify the "zero position" of the sensors so the system will operate correctly.
This pinpoint test is intended to diagnose the following:
^ ABS module
^ Sensor cluster
^ Steering wheel rotation sensor
