P0A90-251

P112 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A90-251: Drive Motor "A" Performance

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 cause the generation of torque.
The generated torque is practically proportionate to the amount of current. Therefore, the system controls the speed of the motor 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.









MONITOR DESCRIPTION

The HV control ECU monitors the hybrid vehicle motor (MG2). If the HV control ECU detects a reduction in the magnetic force of the MG2 or an in-phase short, it interprets this as a MG2 failure. The HV control ECU then illuminates the MIL and sets a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





INSPECTION PROCEDURE

PROCEDURE

1. READ OUTPUT DTC (HV ECU)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
DTC except P0A90 (INF 251) and P0A78 (INF 287, 505, 506) are output
HINT: If any other codes besides P0A90 (INF 251) are output, perform troubleshooting for those DTCs first.

YES -- GO TO RELEVANT DTC CHART
NO -- Continue to next step.

2. REPRODUCTION TEST
(a) Connect the Techstream to the DLC3.
(b) Test-drive the vehicle at a speed of 25 mph (40 km/h) for approximately 1 minute.
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Read output DTC Hybrid Control System.
Result:






A -- GO TO RELEVANT DTC CHART
B -- Continue to next step.

3. CHECK HYBRID VEHICLE MOTOR ASSEMBLY
CAUTION: Wear insulated gloves before performing the following operation.




(a) Turn the power switch OFF.
(b) Remove the service plug grip Removal.
NOTE: Turning the power switch ON (READY) with the service plug grip removed could cause malfunction. Therefore, never turn the power switch ON (READY) in this state.
(c) Check if the three-phase alternating current cable installation bolts on the hybrid vehicle motor are tightened to the specified torque.
Torque: 8.0 Nm (82 kgf-cm, 71 in-lbf)
(d) Reinstall the inverter cover Installation.
(e) Reinstall the service plug grip Installation.
NG -- TIGHTEN THEM TO SPECIFIED TORQUE
OK -- REPLACE HYBRID VEHICLE MOTOR ASSEMBLY