DESCRIPTION
For a description of MG2, Click here.
DTC No. | INF Code | DTC Detection Condition | Trouble Area |
---|---|---|---|
P0A90 | 509 | Motor system malfunction |
|
INSPECTION PROCEDURE
CAUTION:
Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, 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.
Tech Tips
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
PROCEDURE
CHECK DTC OUTPUT (HV)
Connect the intelligent tester to the DLC3.
Turn the power switch on (IG).
Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
Check if DTCs are output.
Result | ||||||
---|---|---|---|---|---|---|
|
DTC No. | Relevant Diagnosis |
---|---|
P0A1A (all INF codes) *1 | Generator Control Module |
P0A1B (all INF codes) *1 | Drive Motor "A" Control Module |
P0A1D (all INF codes) *1 | Hybrid Powertrain Control Module |
P0A3F-243 | Drive Motor "A" Position Sensor Circuit |
P0A40-500 | Drive Motor "A" Position Sensor Circuit Range / Performance |
P0A41-245 | Drive Motor "A" Position Sensor Circuit Low |
P0A4B-253 | Generator Position Sensor Circuit |
P0A4C-513 | Generator Position Sensor Circuit Range / Performance |
P0A4D-255 | Generator Position Sensor Circuit Low |
P0A60 (all INF codes) *1 | Drive Motor "A" Phase V Current |
P0A63 (all INF codes) *1 | Drive Motor "A" Phase W Current |
P0A72 (all INF codes) *1 | Generator Phase V Current |
P0A75 (all INF codes) *1 | Generator Phase W Current |
P0A78-266, 267, 279, 287, 503, 504, 505, 506, 586, 806, 807, 808 | Drive Motor "A" Inverter Performance |
P0A7A-325, 517, 518, 809, 810, 811 | Generator Inverter Performance |
P0A94-547, 548, 549, 554, 555, 556, 585, 587, 589, 590 | DC / DC Converter Performance |
P0AA6 (all INF codes) *1 | Hybrid Battery Voltage System Isolation Fault |
P0C76-523 | Hybrid Battery System Discharge Time Too Long |
P3004-132 | Power Cable Malfunction |
P3233-750 | Short to B+ in Blocking of HV Gate Connection |
P3240-443 | DC / DC Converter Control Circuit |
Tech Tips
*1: If any INF codes are output for this DTC, refer to the corresponding diagnostic flowchart.
P0A90-509 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 Click here |
A |
CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)
CAUTION:
Be sure to wear insulated gloves.
Note
Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector cannot be pulled out.
Turn the power switch off.
Remove the service plug grip. Click here
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.
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. |
Tech Tips
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 |
CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION)
CAUTION:
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
Remove the inverter terminal cover from the inverter with converter assembly.
For LHD vehicles, use the following procedures Click here.
For RHD vehicles, use the following procedures Click here.
Note
Lift the inverter terminal cover horizontally so that it does not tilt. Failure to do so may break the inverter cover guide pins.
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).
Check for arc marks at the bolts for the motor cable.
Result | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
B |
REPLACE MALFUNCTIONING PARTS |
C |
CONNECT SECURELY |
A |
CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MG2)
CAUTION:
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
Disconnect the generator cable and motor cable from the inverter with converter assembly.
Tech Tips
For the removal and installation procedures related to the generator cable and motor cable, Click here.
Check MG2 for an interphase short using a milliohmmeter.
Using a milliohmmeter, measure the resistance according to the value(s) in the table below.
Tech Tips
If the MG2 temperature is high, the resistance will vary greatly from the specification. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.
Standard resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
LHD | ||||||||||||
|
||||||||||||
RHD | ||||||||||||
|
Tech Tips
To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68° F).
R20 = Rt / {1 + 0.00393 X (T - 20)}
The calculation is based on the following:
R20: Resistance at 20°C (68° F) (mΩ)
Rt: Measured resistance (mΩ)
T: Temperature when the resistance is measured (° C)
Using a megohmmeter set to 500 V, measure the 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 | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B |
REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here |
C |
A |
REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here
CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MOTOR CABLE CONNECTION CONDITION)
Remove the hybrid vehicle transmission assembly. Click here
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).
Check for arc marks at the bolts for the motor cable.
Result | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
B |
REPLACE MALFUNCTIONING PARTS |
C |
CONNECT SECURELY |
A |
CHECK MOTOR CABLE
Remove the motor cable from the hybrid vehicle transmission assembly. Click here
Using a megohmmeter set to 500 V, measure the 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 | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Measure the resistance according to the value(s) in the table below.
Standard resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NG |
REPLACE MOTOR CABLE Click here |
OK |
REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here