P0A90 / INF239

DTC P0A90/239 DRIVE MOTOR "A" PERFORMANCE

CIRCUIT DESCRIPTION

DTC Detection Condition:

The HV transaxle consists of a planetary gear unit, MG1, and MG2.

A gear unit uses the planetary gear to split engine output in accordance with a driving request during driving the vehicle or charging its internal HV battery.

The MG2 provides assist to the engine output while increasing the drive force of the vehicle. Furthermore, the MG2 effects regenerative braking by converting the energy (which is consumed in the form of heat during normal braking) into electrical energy and recovering it into the HV battery. Through regenerative braking, as well as decelerating the vehicle, the MG2 generates high-voltage electrical power which is used for the purpose of charging the HV battery.

The MG1 supplies electrical power, which is used for charging the HV battery or for driving the MG2. It also has a stepless transmission function to control the transaxle by regulating the amount of generation of electrical energy, which effectively varies the MG1 speed. In addition, the MG1 is used as a starter motor to start the engine.

The transmission input damper absorbs the shock that accompanies transmission of the drive force from the engine.

Wiring Diagram:

Step 1 - 3:

Step 4 - 6:

Step 6 (Continued) - 8:

Step 9 - 10:

INSPECTION PROCEDURE