Acceleration Control - System Operation and Component Description: Notes

System Operation

Brake Over Accelerator 

The brake over accelerator feature may not be active during low speed operating conditions. This enables unique drive maneuvers, such as trailer tow, boat launch and retrieval, or operation in hilly environments, where the operator may require the application of both the accelerator pedal and the brake pedal during low speed maneuvering. The brake over accelerator feature is active at speeds greater than 16 km/h (10 mph).

In the event when the accelerator pedal becomes entrapped, such as by an object lodging the pedal, the brake over accelerator feature reduces engine power when the brake pedal is applied.

Operators that rest a foot on the brake pedal when also applying the accelerator pedal may activate the brake over accelerator feature. The brake activation is detected by the PCM from the electrical brake switch. In addition to brake over accelerator comments, the customer may bring the vehicle in for repair to address concerns such as a hesitation/stumble or a lack/loss of power. In the event of a hesitation/stumble or a lack/loss of power concern, carry out normal vehicle diagnostics for the appropriate symptom code. If the brake over accelerator feature is suspected, the BRKOVR_ACTION, BRKOVRD_POSS and DIST_BRKOVRD PIDs a brake over accelerator event occurred.

In the event when the brake over accelerator feature is suspected as the cause of the customer concern, explain the details of the override system to the customer as described above. Additionally, make sure the customer is aware that resting a foot on the brake pedal while driving may cause the activation of this feature. This also results in activation of the brake lights on the vehicle while driving. For additional information, refer to the Owner's Literature.