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Home >> Lexus >> 2007 >> RX 400h AWD >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Vehicle Control (P310) - RX400H - DTC P0A7A-309 Through P0A94-589 >> DTC P0A90-251 Drive Motor "A" Performance >> Description

DTC P0A90-251 Drive Motor "A" Performance: Description

When three-phase alternating current flows through the three-phase windings of the stator coil, a rotating magnetic field is generated in the Motor. The system controls the rotating magnetic field in accordance with the rotating position and speed of the rotor. As a result, the permanent magnets provided on the rotor are pulled in the rotating direction, which generates torque. The generated torque is practically proportionate to the amount of current and the system controls Motor speed by regulating the frequency of the alternating current. Furthermore, the system properly controls the rotating magnetic field and the angle of the rotor magnets in order to generate high torque in an efficient manner, even at high speeds.

Fig 1: Identifying Drive Motor Components
G05009525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DTC DETECTION CONDITION AND TROUBLE AREA

DTC No. INF Code DTC Detection Condition Trouble Area
P0A90 251 Motor magnetic force deterioration or same phase short circuit
  • Wire harness or connector
  • Hybrid vehicle transaxle assembly