DTC P0A78-506: Drive Motor "A" Inverter Performance; DTC P0A78-808: 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
   P0A78-202 is not output.	A
   P0A78-202 is also output.	B

   NOTE:

   • If P0A78-202 is output, troubleshoot it first. After completing the troubleshooting for P0A78-202, return to perform troubleshooting for this DTC.
   • Parts repaired or replaced during troubleshooting for P0A78-202 do not need to be re-inspected in this diagnosis procedure.
5. Turn the power switch off.

B → 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 / Trouble Codes.
4. Check if DTCs related to the EV control system are output.

   HINT: 

   • If P0A78-202 was not output in step 1 of this diagnosis procedure, check Table 1 below.
   • If P0A78-202 was output in step 1 of this diagnosis procedure, repair that DTC first, then check Table 2 below.

   Result

   Result	Proceed to
   Only P0A78-506 or 808 is output, or DTCs other than the ones in the table below are also output.	A
   Any of the following DTCs are also output.	B

   TABLE 1
   
   

   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	EV 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
   P0A60 (all INF codes)*1	Drive Motor "A" Phase V Current
   P0A63 (all INF codes)*1	Drive Motor "A" Phase W Current
   P0A78-266, 267, 586	Drive Motor "A" Inverter Performance
   P0A94-585, 587, 589, 590	Inverter Performance
   P0C76-523	EV Battery System Discharge Time Too Long

   TABLE 2
   
   

   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	EV 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
   P0A60-294	Drive Motor "A" Phase V Current
   P0A63-302	Drive Motor "A" Phase W Current
   P0A78-266, 267, 586	Drive Motor "A" Inverter Performance
   P0A94-585, 587, 589, 590	Inverter Performance
   P0C76-523	EV Battery System Discharge Time Too Long

   HINT: 

   • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
   • P0A78-506 or P0A78-808 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.
5. Turn the power switch off.

B → See step   12 

A: Go to next step 

NG → CONNECT SECURELY 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → See step   7 

OK: Go to next step 

NG → CONNECT SECURELY 

OK → See step   11 

NG → CONNECT SECURELY 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   10