P0A90-251

L110F 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 MG2. The system controls the rotation of the magnetic field in accordance with the rotating position and speed of the rotor. As a result, the permanent magnets provided in the rotor are pulled in the direction of rotation, generating torque. The generated torque is almost proportional to the amount of current. The system controls MG2 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.

MONITOR DESCRIPTION

The MG ECU monitors MG2. If the MG ECU detects a reduction in the magnetic force of MG2 or an inphase short, it interprets this as an MG2 failure. The hybrid vehicle control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK DTC OUTPUT (HV)
(a) Connect the intelligent tester or Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO / CURRENT CODES.
(2) Techstream - Select: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:

HINT:
- *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic flowchart.
- P0A90-251 may be set due to a malfunction which also causes DTCs in the preceding table to be set. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.

B -- GO TO DTC CHART
A -- Continue to next step.
2. SIMULATION TEST
(a) Test-drive the vehicle at a speed of 25 mph (40 km/h) for approximately 1 minute.
(b) Select the following menu items:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO / CURRENT CODES.
(2) Techstream - Select: Powertrain / Hybrid Control / Trouble Codes.
(c) Check if DTCs are output.
Result:

B -- GO TO DTC CHART
A -- Continue to next step.
3. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)
NOTE: Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.

(a) Check the connection of the low voltage connector of the inverter with converter assembly.
OK:
The connector is connected securely and there are no contact problems.
HINT: When connecting the connector, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.

NG -- CONNECT SECURELY
OK -- Continue to next step.
4. CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION)
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch off.
(b) Remove the service plug grip. L110F Hybrid Vehicle Control System

NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(d) Check that the bolts for the motor cable are tightened to the specified torque, the motor cable is connected securely, and there are no contact problems.
Specified Condition:
T=8.0 N*m {82 kgf*cm, 71 in.*lbf}
NOTE: Make sure that the tightening torque of the bolts is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).
(e) Check for arc marks at the bolts for the motor cable.
Result:

C -- CONNECT SECURELY
B -- REPLACE MALFUNCTIONING PARTS
A -- Continue to next step.
5. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MOTOR CABLE CONNECTION CONDITION)

(a) Remove the hybrid vehicle transmission assembly. Components

(b) Check that the bolts for the motor cable are tightened to the specified torque, the motor cable is connected securely, and there are no contact problems.
Specified Condition:
T=8.0 N*m {82 kgf*cm, 71 in.*lbf}
NOTE: Make sure that the tightening torque of the bolts is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).
(c) Check for arc marks at the bolts for the motor cable.
Result:

C -- CONNECT SECURELY
B -- REPLACE MALFUNCTIONING PARTS
A -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY