DTC P2797-62: Auxiliary Transmission Fluid Pump Signal Compare Failure [11/2021 - 10/2023]: Description
The oil pump motor controller controls the rotation speed of the oil pump motor (three-phase brushless motor) in accordance with rotation speed request signals sent from the hybrid vehicle control ECU assembly. The controller also outputs the oil pump motor status as a signal to the hybrid vehicle control ECU assembly.
In the normal condition, the actual revolution speed of the oil pump motor corresponds to the allowable range of the rotation speed difference with respect to the required rotation speed requested from the hybrid vehicle control ECU assembly.
The line pressure generated by the oil pump with motor assembly operation is used for the gear control.
The output shaft speed is within the speed difference permissible range of the motor speed in accordance with the gear ratio of each gear position commanded by the hybrid vehicle control ECU assembly.
This DTC is output based on the mechanical gear position inside the transmission. Therefore, check the "Current Calculated Gear Position" Data List item.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P2797-62 | Auxiliary Transmission Fluid Pump Signal Compare Failure | Either condition is met:
(1-trip detection logic) |
|
Comes on | Master Warning: Comes on |
| DTC No. | Data List |
|---|---|
| P2797-62 | Transmission Fluid Pump Motor Revolution |
| DTC No. | Active Test |
|---|---|
| P2797-62 | Control the Transmission Oil Pump* |
*: When the motor is malfunctioning, a deviation may occur between the Techstream motor speed command and the actual motor speed.