DTC P0A7A-203: Generator Inverter Performance: Procedure

NG → See step   4 

OK: Go to next step 

Refer to COMPONENTS

NEXT: Go to next step 

1. Check the other DTCs that were output together with DTC P0A7A-203.
   RESULT
   
   

   DTC No.	Relevant Diagnosis
   P0A7A-122, 130, 322, 324, 325, 517, 518, 809, 810, 811	Generator Inverter Performance

   NOTE:

   DTC P0A7A-203 is stored after any of DTCs P0A7A-122, 130, 322, 324, 325, 517, 518, 809, 810 and 811 are stored. After troubleshooting and repairing DTC P3245-203, be sure to troubleshoot all the other DTCs.

NEXT → See step   16 

NG → See step   8 

OK: Go to next step 

Refer to COMPONENTS

NEXT: Go to next step 

Refer to COMPONENTS

NEXT: Go to next step 

1. Check the other DTCs that were output together with DTC P0A7A-203.
   RESULT
   
   

   DTC No.	Relevant Diagnosis
   P0A7A-122, 130, 322, 324, 325, 517, 518, 809, 810, 811	Generator Inverter Performance

   NOTE:

   DTC P0A7A-203 is stored after any of DTCs P0A7A-122, 130, 322, 324, 325, 517, 518, 809, 810 and 811 are stored. After troubleshooting and repairing DTC P3245-203, be sure to troubleshoot all the other DTCs.

NEXT → See step   16 

1. Check that the service plug grip is not installed.
   NOTE:

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

2. Remove the inverter with converter assembly.
3. Disconnect the generator cable from the hybrid vehicle transaxle assembly.
4. Check MG1 for an interphase short using a milliohmmeter.
   Fig 1: Checking MG1 For An Interphase Short

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

      HINT: 

      If the MG1 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

      Tester Connection	Switch Condition	Specified Condition
      f2-2 (U) - f2-1 (V)	Power switch off	87.0 to 96.2 mΩ
      f2-1 (V) - f2-3 (W)	Power switch off	87.0 to 96.2 mΩ
      f2-3 (W) - f2-2 (U)	Power switch off	87.0 to 96.2 mΩ

      TEXT IN ILLUSTRATION
      
      

      *a	Hybrid Vehicle Transaxle Assembly

      HINT: 

      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 x 20°C (68°F) (mΩ)
      • Rt: Measured resistance (mΩ)
      • T: Temperature when the resistance is measured (°C)
5. 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

   Tester Connection	Switch Condition	Specified Condition
   f2-2 (U) - Body ground and shield ground	Power switch off	100 MΩ or higher
   f2-1 (V) - Body ground and shield ground	Power switch off	100 MΩ or higher
   f2-3 (W) - Body ground and shield ground	Power switch off	100 MΩ or higher

6. Connect the generator cable.
7. Install the inverter with converter assembly.

NG → See step   12 

OK: Go to next step 

Refer to COMPONENTS

NEXT: Go to next step 

Refer to COMPONENTS

NEXT: Go to next step 

1. Check the other DTCs that were output together with DTC P0A7A-203.
   RESULT
   
   

   DTC No.	Relevant Diagnosis
   P0A7A-122, 130, 322, 324, 325, 517, 518, 809, 810, 811	Generator Inverter Performance

   NOTE:

   DTC P0A7A-203 is stored after any of DTCs P0A7A-122, 130, 322, 324, 325, 517, 518, 809, 810 and 811 are stored. After troubleshooting and repairing DTC P3245-203, be sure to troubleshoot all the other DTCs.

NEXT → See step   16 

Refer to COMPONENTS

NEXT: Go to next step 

Refer to COMPONENTS

NEXT: Go to next step 

Refer to COMPONENTS

NEXT: Go to next step 

1. Check the other DTCs that were output together with DTC P0A7A-203.
   RESULT
   
   

   DTC No.	Relevant Diagnosis
   P0A7A-122, 130, 322, 324, 325, 517, 518, 809, 810, 811	Generator Inverter Performance

   NOTE:

   DTC P0A7A-203 is stored after any of DTCs P0A7A-122, 130, 322, 324, 325, 517, 518, 809, 810 and 811 are stored. After troubleshooting and repairing DTC P3245-203, be sure to troubleshoot all the other DTCs.

NEXT → See step   16