Normal Operation

The ABS module uses information received from several sensors (wheel speed sensors, steering wheel rotation sensor, stability control sensors, etc.) to determine if a vehicle instability event is about to occur. If an event is going to occur, the ABS module adjusts brake torque at specific wheels and the PCM reduces engine torque to make the vehicle more stable. Once the ABS module has determined that the stability event has been corrected, it returns brake and engine torque to normal and continues to monitor the vehicle.

• DTC C1996 (Active Yaw and/or Roll Control Disabled) - The ABS module monitors the stability event and is programmed to set DTC C1996 and disable the stability control system if the stability event lasts longer than 15 seconds.

This pinpoint test is intended to diagnose the following: 

• Steering wheel rotation sensor
• Stability control sensor
• Wheel speed sensors
• ABS module
• Restraints Control Module (RCM)