HYBRID BATTERY SYSTEM, Diagnostic DTC:P308A-123

DTC Code	DTC Name
P308A-123	Hybrid Battery Voltage Sensor All Circuits Low

DESCRIPTION

Refer to the description for DTC P0A80-123 Click here.

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P308A	123	When the voltage of all battery blocks becomes less than 2.8 V (open) for each connector (1 trip detection)	HV battery Battery smart unit

DTC No.

INF Code

DTC Detection Condition

Trouble Area

P308A

123

When the voltage of all battery blocks becomes less than 2.8 V (open) for each connector

(1 trip detection)

HV battery
Battery smart unit

Tech Tips

Values smaller than 2.8 V may not be shown in the Data List because a fail-safe value is substituted.

CAUTION / NOTICE / HINT

CAUTION:

Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
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 Click here.

Tech Tips

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
When disposing of HV battery, make sure to return them through an authorized collection agent who is capable of handling them safely. If they are returned via the manufacturer specified route, they will be returned properly and in a safe manner by an authorized collection agent.
Before returning the HV battery, make sure to perform a recovery inspection Click here
Make a note of the output DTCs as some of them may be necessary for recovery inspection of the HV battery.

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 Click here.

PROCEDURE

CHECK DTC OUTPUT (HYBRID CONTROL)

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

Read output DTCs.

Result

Result	Proceed to
P31AB-123 is not output	A
P31AB-123 is output	B

Turn the power switch off.

GO TO DTC CHART (P31AB-123) Click here

CHECK DTC OUTPUT (HYBRID CONTROL)

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

Read output DTCs Click here.

Result

Result	Proceed to
P0AFC-123 is not output.	A
P0AFC-123 is also output.	B

Turn the power switch off.

GO TO DTC CHART (P0AFC-123) Click here

CHECK CONNECTOR CONNECTION CONDITION (BATTERY SMART UNIT CONNECTOR)
CAUTION:

Be sure to wear insulated gloves.
1. Check that the service plug grip is not installed.
  
  Note
  
  After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
2. Remove the No. 1 hybrid battery shield sub-assembly Click here.
3. Check the connections of the battery smart unit.
  
  OK
  
  The connectors are connected securely and there are no contact problems.
4. Install the No. 1 hybrid battery shield sub-assembly.
NG
CONNECT SECURELY

OK
REPLACE BATTERY SMART UNIT

Click here.

NEXT
CLEAR DTC (HV)
1. Connect the GTS to the DLC3.
2. Turn the power switch on (IG).
3. Check that the shift lever is in P.
4. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
5. Clear the DTCs and freeze frame data.
  
  Note
  
  When DTCs are cleared, freeze frame data and INF codes are also cleared.
NEXT

OK
The connectors are connected securely and there are no contact problems.

RECONFIRM DTC OUTPUT

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

Read output DTCs Click here.

Result

Result	Proceed to
P308A-123 is not output	A
P308A-123 is output	B

Turn the power switch off.

RETURNS TO NORMAL OPERATION

REPLACE HV BATTERY Click here