P0A92-521

P310 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A92-521: Hybrid Generator Performance

DTC P0A92-521 - Hybrid Generator 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.

MONITOR DESCRIPTION

The MG ECU monitors the hybrid vehicle generator system. If the MG ECU detects a malfunction in the Generator system, HV control ECU illuminates the MIL and sets 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 to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals.
HINT: At least 5 minutes is required to discharge the high-voltage capacitor inside the w/ converter inverter assembly.

PROCEDURE

1. DTC OUTPUT (HV)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Read output DTCs. Hybrid Control System

Result:
The DTCs shown in the table below are output

HINT:
- Turning the ignition switch to the ON position with the service plug grip and inverter cover removed causes interlock switch system DTC P0AD-350 output.
- P0A92-521 may be output due to a malfunction which causes the DTCs in the table above to be output. In this case, first troubleshoot the output DTCs in the table above. Then, perform a reproduction test to check that no DTCs are output.

YES -- GO TO DTC CHART
NO -- Continue to next step.
2. CHECK CONNECTION CONDITION OF MG ECU CONNECTOR (LOOSENESS AND POOR CONTACT)
CAUTION: Be sure to wear insulated gloves.
(a) Turn the ignition switch off and remove the service plug grip. Hybrid Control System

NOTE: Do not put the vehicle into the READY-on state with the service plug grip removed as this may cause a malfunction.
(b) Remove the inverter cover. Components

NOTICE:
- Wrap the interlock round terminal for the inverter cover with vinyl tape to prevent it from shorting to ground.
- Prevent water in the reservoir tank from entering the inverter.
- Removing the inverter cover causes the MG ECU board to be exposed. Therefore, temporarily install the inverter cover for each area to be inspected.

(c) Check the connections of the MG ECU connectors.
OK:
Connectors are connected securely and there is no poor connection.
NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK W/ CONVERTER INVERTER ASSEMBLY (GENERATOR)
CAUTION: Be sure to wear insulated gloves.

(a) Check that the service plug grip is moved.
(b) Check that the bolts for the three-phase AC cable for Generator are tightened to the specified torque.
Torque: 10 Nm (102 kgf-cm, 7 ft-lbf)
NOTICE:
- Be sure to use a torque wrench to tighten the bolts.
- Make sure that the tightening torque is between 8.0 and 12 N*m {82 to 122 kgf*cm, 6 to 9 ft.*lbf}.

NG -- TIGHTEN THEM TO SPECIFIED TORQUE
OK -- Continue to next step.
4. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (GENERATOR)
CAUTION: Be sure to wear insulated gloves.
(a) Check that the service plug grip is removed.

(b) Disconnect the three-phase AC cables for Motor and Generator from the w/ converter inverter assembly.

NOTE: If the Generator temperature is too high, the resistance changes greatly. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.
(d) To correct the resistance varying depending on the temperature, use the following formula to calculate the resistance at 68°F (20°C).
HINT:
- R20 = Rt / {1 + 0.00393 X (T - 20)}
- R20: Resistance at 68°F (20°C) (mOhms)
- Rt: Measured resistance (mOhms)
- T: Temperature when the resistance is measured (°C)
(e) Calculate the difference between the maximum and minimum resistance.
Standard Resistance:
Difference is 3 mOhms or less
(f) Using a megohmmeter, measure the insulation resistance according to the value(s) in the table below.
NOTE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

Standard Resistance:

NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
OK -- REPLACE W/ CONVERTER INVERTER ASSEMBLY