DTC P0A78-586: Drive Motor "A" Inverter Performance: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV / Trouble Codes.
4. Check if DTCs related to the EV control system are output.

   Result

   Result	Proceed to
   Only P0A78-586 is output or P0A78-586 and DTCs other than the ones in the table below are also output.	A
   Any of the following DTCs are also output.	B

   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	EV Control Module
   P0A1F-832, 833	Battery Energy Control Module
   P0A78-266, 267	Drive Motor "A" Inverter Performance
   P0A94-589, 590	Inverter Performance
   P2511-149	ECM/PCM Power Relay Sense 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"
   U0111-826	Lost Communication with Battery Energy Control Module "A"

   HINT: 

   • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
   • P0A78-586 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.
5. Turn the power switch off.

B → See step   10 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV Battery / Trouble Codes.
4. Check if DTCs related to the EV battery system are output.

   Result

   Result	Proceed to
   DTCs related to EV Battery are not output, or DTCs other than the ones in the table below are also output.	A
   Any of the following DTCs are also output.	B

   DTC No.	Relevant Diagnosis
   P0AFC-123	EV Battery No. 1 Pack Sensor Module
   P0B3D-123	EV Battery No. 1 Voltage Sense "A" Circuit Low
   P0B42-123	EV Battery No. 1 Voltage Sense "B" Circuit Low
   P0B47-123	EV Battery No. 1 Voltage Sense "C" Circuit Low
   P0B4C-123	EV Battery No. 1 Voltage Sense "D" Circuit Low
   P0B51-123	EV Battery No. 1 Voltage Sense "E" Circuit Low
   P0B56-123	EV Battery No. 1 Voltage Sense "F" Circuit Low
   P0B5B-123	EV Battery No. 1 Voltage Sense "G" Circuit Low
   P0B60-123	EV Battery No. 1 Voltage Sense "H" Circuit Low
   P0B65-123	EV Battery No. 1 Voltage Sense "I" Circuit Low
   P0B6A-123	EV Battery No. 1 Voltage Sense "J" Circuit Low
   P0B6F-123	EV Battery No. 1 Voltage Sense "K" Circuit Low
   P0B74-123	EV Battery No. 1 Voltage Sense "L" Circuit Low
   P0B79-123	EV Battery No. 1 Voltage Sense "M" Circuit Low
   P308A-123	EV Battery No. 1 Voltage Sensor All Circuits Low

   HINT: 

   P0A78-586 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.

5. Turn the power switch off.

B → See step   11 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV / Trouble Codes.
4. Read and record the DTCs and freeze frame data.

   HINT: 

   The recorded DTCs and freeze frame data may be used in Steps 7, so make sure to record them.

5. Clear DTCs and freeze frame data.
6. Turn the power switch off.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (READY).
3. Wait 15 seconds or more.
4. Enter the following menus: Powertrain / EV / Trouble Codes.
5. Check if DTCs related to the EV control system are output.

   Result

   Result	Proceed to
   No DTCs are output, or DTCs other than the following are output.	A
   P0AFC-129 is output.	B
   P0C76-523 is output.	C

6. Turn the power switch off.

B → See step   12 

C → See step   9 

A: Go to next step 

1. Turn the power switch on (READY).
2. Perform a road test that repeats full acceleration to 60 km/h (37 mph) and then braking to a complete stop three times.
   NOTE:

   Perform this road test only in an appropriate safe location, in accordance with all local laws.

3. Connect the Techstream to the DLC3.
4. Enter the following menus: Powertrain / EV / Trouble Codes.
5. Check if DTCs related to the EV control system are output.

   Result

   Result	Proceed to
   No DTCs are output, or DTCs other than the following are output.	A
   P0AFC-129 is output.	B
   P0C76-523 is output.	C

6. Turn the power switch off.

B → See step   12 

C → See step   9 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (READY).
3. Enter the following menus: Powertrain / EV / Data List.
4. Select "Battery No. 1 Power Resource VB", "VL-Voltage" and "VH-Voltage" in the Data List.
5. Shift lever is in P, and read the Data List when the vehicle is stationary.

   Result

   Result	Proceed to
   Both of the following are not satisfied.	A
   Both of the following are satisfied: Difference between "Battery No. 1 Power Resource VB" and "VL-Voltage" is less than 5 V. Difference between "VL-Voltage" and "VH-Voltage" is more than 55 V.	B
   Both of the following are satisfied: Difference between "VH-Voltage" and "VL-Voltage" is less than 5 V. Difference between "Battery No. 1 Power Resource VB" and "VL-Voltage" is more than 15 V.	C

B → See step   9 

C → See step   12 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV / Trouble Codes.
4. Read the freeze frame data of DTC P0A78-586.

   HINT: 

   If P0A78-586 is not reproduced at this time, read the freeze frame data recorded in Step 3.

   Result

   Result	Proceed to
   Both of the following are satisfied or both of the following are not satisfied.	A
   "Battery No. 1 Power Resource VB" is less than 188 V or more than 322 V.	B
   "VH-Voltage" is less than 188 V or more than 322 V.	C

5. Turn the power switch off.

B → See step   12 

C → See step   9 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV Battery / Data List.
4. Shift lever is in P, and read the Data List "Battery No. 1 Power Resource VB" and "Battery No. 1 Block Voltage - V01 to V12", when the vehicle is stationary.

   Result

   Result	Proceed to
   Both of the following are satisfied: Sum of "Battery No. 1 Block Voltage - V01 to V12" is more than ("Battery No. 1 Power Resource VB" - 35 V) Sum of "Battery No. 1 Block Voltage - V01 to V12" is less than ("Battery No. 1 Power Resource VB" + 25 V)	A
   The preceding condition is not satisfied.	B

5. Turn the power switch off.

B → See step   12 

A → See step   9