DTC : P061B (9-Speed A/T): General Description

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

The powertrain control module (PCM) calculates the target torque from the accelerator pedal inputs, external demands, and auxiliary load information, and calculates the allowable torque of up to acceleration state leads to hazardous event for the target torque. Abnormal accelerations are detected by the relations of the target torque, the allowable torque, and the torque estimated from engine output command. There are two methods to detect abnormal accelerations; time judgment method and integration judgment method. If both of the methods are judged abnormal, the powertrain control module (PCM) detects a malfunction and stores a DTC.

• Time judgment method: Malfunction is established if the estimated torque is higher than the target torque for a specified time. The allowable time changes depending on the difference width between the estimated torque and the allowable torque.
• Integration judgment method: Malfunction is established if the integration value of torque difference exceeds a threshold.