HYBRID BATTERY SYSTEM, Diagnostic DTC:P1A6017, P1A6317, P1A6617, P1A6917, P31AA17

DTC Code	DTC Name
P1A6017	Hybrid/EV Battery Stack 2 Cell Circuit Voltage Above Threshold
P1A6317	Hybrid/EV Battery Stack 3 Cell Circuit Voltage Above Threshold
P1A6617	Hybrid/EV Battery Stack 4 Cell Circuit Voltage Above Threshold
P1A6917	Hybrid/EV Battery Stack 5 Cell Circuit Voltage Above Threshold
P31AA17	Hybrid/EV Battery Stack 1 Cell Circuit Voltage Above Threshold

DESCRIPTION

The HV battery is composed of 95 cells (3.7 V each) in series. The Hybrid vehicle control ECU monitors the voltage of each HV battery cell to detect malfunctions of the HV battery.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P1A6017	Hybrid/EV Battery Stack 2 Cell Circuit Voltage Above Threshold	Charging continues to be performed after the voltage of any cell of the No. 2 HV supply stack sub-assembly has exceeded the threshold. (1 trip detection logic)	No. 2 HV supply stack sub-assembly Hybrid vehicle control ECU	Comes on	Master Warning Light: Comes on
P1A6317	Hybrid/EV Battery Stack 3 Cell Circuit Voltage Above Threshold	Charging continues to be performed after the voltage of any cell of the No. 3 HV supply stack sub-assembly has exceeded the threshold. (1 trip detection logic)	No. 3 HV supply stack sub-assembly Hybrid vehicle control ECU	Comes on	Master Warning Light: Comes on
P1A6617	Hybrid/EV Battery Stack 4 Cell Circuit Voltage Above Threshold	Charging continues to be performed after the voltage of any cell of the No. 4 HV supply stack sub-assembly has exceeded the threshold. (1 trip detection logic)	No. 4 HV supply stack sub-assembly Hybrid vehicle control ECU	Comes on	Master Warning Light: Comes on
P1A6917	Hybrid/EV Battery Stack 5 Cell Circuit Voltage Above Threshold	Charging continues to be performed after the voltage of any cell of the No. 5 HV supply stack sub-assembly has exceeded the threshold. (1 trip detection logic)	No. 5 HV supply stack sub-assembly Hybrid vehicle control ECU	Comes on	Master Warning Light: Comes on
P31AA17	Hybrid/EV Battery Stack 1 Cell Circuit Voltage Above Threshold	Charging continues to be performed after the voltage of any cell of the No. 1 HV supply stack sub-assembly has exceeded the threshold. (1 trip detection logic)	No. 1 HV supply stack sub-assembly Hybrid vehicle control ECU	Comes on	Master Warning Light: Comes on

Related Data List
DTC No.	Data List
P1A6017	Hybrid Battery Cell 1 to 95 Voltage
P1A6317
P1A6617
P1A6917
P31AA17

The following items can be helpful when performing repairs:

Data List

WIN Control Limit Power
Hybrid Battery Current
Hybrid Battery Voltage
Hybrid Battery SOC

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

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Connect the GTS to the DLC3.
Turn the power switch on (IG) and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for 2 minutes or more.
Turn the power switch on (IG) and turn the GTS on.
Drive the vehicle on urban roads for approximately 10 minutes.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
Tech Tips
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

CAUTION / NOTICE / HINT

CAUTION:

Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.

Inspecting the high-voltage system
Disconnecting the low voltage connector of the inverter with converter assembly
Disconnecting the low voltage connector of the HV battery
Disconnecting the low voltage connector of the electric vehicle charger assembly
Disconnecting the low voltage connector of the solar energy control unit

To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
*a Without waiting for 10 minutes

After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

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Tech Tips

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly and the electric vehicle charger assembly.
*a Dealer

*b Battery Collection Agent

When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

Accidents such as electric shock may result if the HV battery is disposed of improperly or abandoned. Therefore, make sure to return all HV batteries through an authorized collection agent.

Before returning the HV battery, make sure to perform a recovery inspection.

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Before returning the HV supply stack sub-assembly, make sure to perform a recovery inspection.

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Make a note of the output DTCs as some of them may be necessary for recovery inspection of the HV battery and HV supply stack sub-assemblies.
After removing the HV battery, keep it away from water. Exposure to water may cause the HV battery to produce heat, resulting in a fire.

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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PROCEDURE

CHECK DTC OUTPUT (HV BATTERY)

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / HV Battery / Trouble Codes.

Check for DTCs.

Powertrain > HV Battery > Trouble Codes

Result

Result	Proceed to
"P0C3000 or P31B300" is not output.	A
"P0C3000 or P31B300" is also output.	B

Turn the power switch off.

CHECK DTC Click here

CHECK DTC

Check the DTCs that were output when the vehicle was brought to the workshop.

Result

Result	Proceed to
"P1A6017" is also output.	A
"P1A6317" is also output.	B
"P1A6617" is also output.	C
"P1A6917" is also output.	D
"P31AA17" is also output.	E

REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 3 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 4 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 5 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY Click here

CHECK DTC

Check the DTCs that were output when the vehicle was brought to the workshop.

Result

Result	Proceed to
"P1A6017" is also output.	A
"P1A6317" is also output.	B
"P1A6617" is also output.	C
"P1A6917" is also output.	D
"P31AA17" is also output.	E

REPLACE NO. 3 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 4 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 5 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY

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Result

Proceed to
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