HYBRID CONTROL SYSTEM, Diagnostic DTC:P3246-202

DESCRIPTION

For a description of the inverter, (Click here).

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MG2)

   CAUTION:

   Be sure to wear insulated gloves.

   
   

   1. 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.

   2. Check that the service plug grip is not installed.

   3. Disconnect the generator cable and motor cable from the inverter with converter assembly.

      Tip:

      For the removal and installation procedures related to the generator cable and motor cable, (Click here).

   4. 

      Check MG2 for an interphase short using a milliohmmeter.

      
      

      1. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

         Tip:

         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
         Tester Connection Switch Condition Specified Condition U - V Power switch off 46.9 to 51.8 mΩ V - W Power switch off 47.1 to 52.1 mΩ W - U Power switch off 46.8 to 51.8 mΩ
         RHD
         Tester Connection Switch Condition Specified Condition U - V Power switch off 47.2 to 52.2 mΩ V - W Power switch off 47.4 to 52.4 mΩ W - U Power switch off 47.2 to 52.1 mΩ

         Tip:
         

         • 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)

   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 U - Body ground and shielded wire ground Power switch off 100 MΩ or higher V - Body ground and shielded wire ground Power switch off 100 MΩ or higher W - Body ground and shielded wire ground Power switch off 100 MΩ or higher

   
   
   • OKClick here
   • NGClick here
2. Click here

   REPLACE INVERTER WITH CONVERTER ASSEMBLY

   
   

   1. Replace the inverter with converter assembly (Click herefor LHD,Click herefor RHD).

   
   
   • NEXTClick here
3. Click here

   CHECK MOTOR CABLE

   
   

   1. Remove the motor cable from the hybrid vehicle transmission assembly. (Click here)

   2. 

      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 U - Shielded wire ground Power switch off 100 MΩ or higher V - Shielded wire ground Power switch off 100 MΩ or higher W - Shielded wire ground Power switch off 100 MΩ or higher U - V Power switch off 100 MΩ or higher V - W Power switch off 100 MΩ or higher W - U Power switch off 100 MΩ or higher

   3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition U - U Power switch off 1 Ω or less V - V Power switch off 1 Ω or less W - W Power switch off 1 Ω or less

   
   
   • OKClick here
   • NGClick here
4. Click here

   REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY

   
   

   1. Replace the hybrid vehicle transmission assembly (Click here).

   
   
   • NEXTClick here
5. Click here

   REPLACE INVERTER WITH CONVERTER ASSEMBLY

   
   

   1. Replace the inverter with converter assembly (Click herefor LHD,Click herefor RHD).

   
   
   • NEXTClick here
6. Click here

   REPLACE MOTOR CABLE

   
   

   1. Replace the motor cable (Click here).

   
   
   • NEXTClick here
7. Click here

   REPLACE INVERTER WITH CONVERTER ASSEMBLY

   
   

   1. Replace the inverter with converter assembly (Click herefor LHD,Click herefor RHD).

   
   
   • NEXTClick here
8. Click here

   CHECK DTC OUTPUT (HV)

   
   

   1. Check the other DTCs that were output together with DTC P3246-202.

      DTC No.	Relevant Diagnosis
      P0A78-113, 128, 284, 286, 287, 505, 506, 806, 807, 808	Drive Motor "A" Inverter Performance

      Note:

      DTC P3246-202 is stored after any of DTCs P0A78-113, 128, 284, 286, 287, 505, 506, 806, 807 and 808 are stored. After troubleshooting and repairing DTC P3246-202, be sure to troubleshoot all the other DTCs.

   
   
   • NEXTClick here
9. Click here

   GO TO DTC CHARTClick here