DTC P0C76-523: EV Battery System Discharge Time Too Long: 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 P0C76-523 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

   DTC No.	Relevant Diagnosis
   P060B-134, 135, 570	Internal Control Module A/D Processing Performance
   P06A4-209	Sensor Reference Voltage "D" Circuit Low
   P06A5-210	Sensor Reference Voltage "D" Circuit High
   P0A1A-151, 155, 156, 658, 659	Generator Control Module
   P0A1B-163, 164, 168, 193, 511, 512, 661, 786, 794, 795, 796	Drive Motor "A" Control Module
   P0A1D-148	EV Control Module
   P0A1F-832, 833	Battery Energy 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
   P0A78-266, 267, 586	Drive Motor "A" Inverter Performance
   P0A94-585, 587	Inverter Performance
   P0AC0-817	EV Battery Pack Current Sensor "A" Circuit Range/Performance
   P0ADB-227	EV Battery No. 1 Positive Contactor Control Circuit Low
   P0ADC-226	EV Battery No. 1 Positive Contactor Control Circuit High
   P0ADF-229	EV Battery Negative Contactor Control Circuit Low
   P0AE0-228	EV Battery Negative Contactor Control Circuit High
   P0AE6-225	EV Battery Precharge Contactor Control Circuit Low
   P0AE7-224	EV Battery Precharge Contactor Control Circuit High
   P2511-149	ECM/PCM Power Relay Sense Circuit Intermittent
   P324E-788	MG-ECU Power Relay Intermittent Circuit
   P3322-368	EV Battery No. 2 Positive Contactor Control Circuit Low
   P3323-367	EV Battery No. 2 Positive Contactor Control Circuit High
   P33A2-123	Total Power Resource IB Sensor Circuit Low
   P33A3-123	Total Power Resource IB Sensor Circuit High
   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.
   • P0C76-523 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   7 

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

NEXT: Go to next step 

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

   Result

   Result	Proceed to
   None of the following DTCs are output.	A
   DTCs shown in Table 1 are output.	B
   DTCs shown in Table 2 are output.	C

   TABLE 1
   
   

   DTC No.	Relevant Diagnosis
   P0C76-523	EV Battery System Discharge Time Too Long

   TABLE 2
   
   

   DTC No.	Relevant Diagnosis
   P0ADB-227	EV Battery No. 1 Positive Contactor Control Circuit Low
   P0ADF-229	EV Battery Negative Contactor Control Circuit Low
   P0AE6-225	EV Battery Precharge Contactor Control Circuit Low
   P3004-131, 132, 803	High Voltage Power Resource
   P3322-368	EV Battery No. 2 Positive Contactor Control Circuit Low

B → See step   9 

C → See step   10 

A: Go to next step 

1. Begin with the SOC at 10% or less.
2. Turn the power switch off and wait for 20 seconds. [A]
3. Turn the power switch on (IG). [B]
4. Turn the power switch off again. [C]
5. Repeat procedures [A] through [C], 10 times.
6. Begin normal charging, and continue charging until the SOC is 35% or more.

   HINT: 

   To shorten charging time, charging at 240 V is recommended.

NEXT: 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.

   Result

   Result	Proceed to
   None of the following DTCs are output.	A
   Any of the following DTCs are also output.	B

   DTC No.	Relevant Diagnosis
   P0A78-121	Drive Motor "A" Inverter Performance
   P0A94-127	Inverter Performance
   P0C76-523	EV Battery System Discharge Time Too Long
   P320F-660	On-Board Charger System Malfunction

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 / Plug-in Control / Trouble Codes.
4. Check if DTCs related to the Plug-in control system are output.

   Result

   Result	Proceed to
   None of the following DTCs are output.	A
   Any of the following DTCs are also output.	B

   DTC No.	Relevant Diagnosis
   P321D-644	Charging System Voltage High

5. Turn the power switch off.

B → See step   11 

A → See step   8