HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A78-586

DESCRIPTION

For a description of the inverter (Click here).

The signal line from the inverter voltage (VH) sensor is connected to the MG ECU inside the inverter with converter assembly. If P0A78-586 is output, replace the inverter with converter assembly.

PROCEDURE

1. Click here

   CHECK DTC OUTPUT (HYBRID CONTROL)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

   4. Check for DTCs.

      Result
      Result Proceed to P0A78-586 only is output, or DTCs except the ones in the table below are also output. A DTCs shown in Table 1 are output simultaneously. B DTCs shown in Table 2 are output simultaneously. C

      Table 1. Table 1

      DTC No.	Relevant Diagnosis
      P0A1A-151, 155, 156, 658, 659	Generator Control Module
      P0A1B-164, 193, 512, 661, 786	Drive Motor "A" Control Module
      P0A1D-148	Hybrid Powertrain Control Module
      P0A78-266, 267	Drive Motor "A" Inverter Performance
      P0A94-589, 590	DC/DC Converter Performance
      P2511-149	ECM/PCM Power Relay Sensor Circuit Intermittent
      P3004-132	High Voltage Power Resource
      P324E-788	MG-ECU Power Relay Intermittent Circuit
      U0110 (all INF codes)*1	Lost Communication with Drive Motor Control Module "A"

      Table 2. Table 2

      DTC No.	Relevant Diagnosis
      P0AFC-123	Hybrid Battery Pack Sensor Module
      P0B3D-123	Hybrid Battery Voltage Sensor "A" Circuit Low
      P0B42-123	Hybrid Battery Voltage Sensor "B" Circuit Low
      P0B47-123	Hybrid Battery Voltage Sensor "C" Circuit Low
      P0B4C-123	Hybrid Battery Voltage Sensor "D" Circuit Low
      P0B51-123	Hybrid Battery Voltage Sensor "E" Circuit Low
      P0B56-123	Hybrid Battery Voltage Sensor "F" Circuit Low
      P0B5B-123	Hybrid Battery Voltage Sensor "G" Circuit Low
      P0B60-123	Hybrid Battery Voltage Sensor "H" Circuit Low
      P0B65-123	Hybrid Battery Voltage Sensor "I" Circuit Low
      P0B6A-123	Hybrid Battery Voltage Sensor "J" Circuit Low
      P0B6F-123	Hybrid Battery Voltage Sensor "K" Circuit Low
      P0B74-123	Hybrid Battery Voltage Sensor "L" Circuit Low
      P0B79-123	Hybrid Battery Voltage Sensor "M" Circuit Low
      P0B7E-123	Hybrid Battery Voltage Sensor "N" Circuit Low
      P0B83-123	Hybrid Battery Voltage Sensor "O" Circuit Low
      P0B88-123	Hybrid Battery Voltage Sensor "P" Circuit Low
      P0B8D-123	Hybrid Battery Voltage Sensor "Q" Circuit Low
      P0B92-123	Hybrid Battery Voltage Sensor "R" Circuit Low
      P308A-123	Hybrid Battery Voltage Sensor All Circuits Low

      Tip:
      

      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.

      • P0A78-586 may be stored due to a malfunction which causes the DTCs in the preceding table to be stored. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a reproduction test to check that no DTCs are output.

   5. Turn the power switch off.

   
   
   • A

     REPLACE INVERTER WITH CONVERTER ASSEMBLY (Click here)

   • B

     GO TO DTC CHART (HYBRID CONTROL SYSTEM) (Click here)

   • C

     GO TO DTC CHART (HYBRID BATTERY SYSTEM) (Click here)