HYBRID BATTERY SYSTEM, Diagnostic DTC:P0ABF-123, P0AC1-123, P0AC2-123

DTC Code	DTC Name
P0ABF-123	Hybrid Battery Pack Current Sensor Circuit
P0AC1-123	Hybrid Battery Pack Current Sensor "A" Circuit Low
P0AC2-123	Hybrid Battery Pack Current Sensor "A" Circuit High

DESCRIPTION

The battery current sensor, which is mounted on the positive cable side of the HV battery assembly, detects the amperage that flows into the HV battery. The battery smart unit inputs a voltage, which varies between 0 and 5 V in proportion to the amperage, into the IB terminal from the battery current sensor. An output voltage of the battery current sensor below 2.5 V indicates that the HV battery is being discharged, and above 2.5 V indicates that the HV battery is being charged. The power management control ECU determines the charging and discharging amperage of the HV battery based on the signals that are input to its IB terminal from the battery smart unit, and calculates the SOC (state of charge) of the HV battery through the accumulated amperage.

DTC No.	DTC Detection Condition	Trouble Area
P0ABF-123 P0AC1-123 P0AC2-123	When the battery current sensor is abnormal (1 trip detection)	Hybrid battery junction block assembly Battery smart unit Wire harness or connector

DTC No.

DTC Detection Condition

Trouble Area

P0ABF-123

P0AC1-123

P0AC2-123

When the battery current sensor is abnormal (1 trip detection)

Hybrid battery junction block assembly
Battery smart unit
Wire harness or connector

WIRING DIAGRAM

INSPECTION PROCEDURE

CAUTION:

Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. 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 disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

Tech Tips

At least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Note

After the power switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the power switch off, make sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal
Specification	Waiting Time
w/o Telematics transceiver	60 sec.
w/ Telematics transceiver	120 sec.

PROCEDURE

CHECK DTC OUTPUT (DTC P0AFC-123 IS OUTPUT)

Connect the intelligent tester 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

Disconnect the intelligent tester from the DLC3.

GO TO DTC CHART

CHECK HARNESS AND CONNECTOR (HYBRID BATTERY JUNCTION BLOCK ASSEMBLY - BATTERY SMART UNIT)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Disconnect the cable from the negative (-) battery terminal.
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.
Remove the battery cover Click here.
Remove the battery smart unit.

Tech Tips

Disconnect only the z29 connector of the battery smart unit.
Disconnect the z33 battery current sensor connector from the hybrid battery junction block assembly .

Text in Illustration
*1	Rear view of wire harness connector (to Battery Smart Unit)
*2	Front view of wire harness connector (to Hybrid Battery Junction Block Assembly)

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open)

Tester Connection	Switch Condition	Specified Condition
z29-9 (IB) - z33-3 (IB)	Power switch off	Below 1 Ω
z29-20 (GIB) - z33-2 (GIB)	Power switch off	Below 1 Ω
z29-10 (VIB) - z33-1 (VIB)	Power switch off	Below 1 Ω

Standard Resistance (Check for Short)

Tester Connection	Switch Condition	Specified Condition
z29-9 (IB) or z33-3 (IB) - Body ground and other terminals	Power switch off	10 kΩ or higher
z29-20 (GIB) or z33-2 (GIB) - Body ground and other terminals	Power switch off	10 kΩ or higher
z29-10 (VIB) or z33-1 (VIB) - Body ground and other terminals	Power switch off	10 kΩ or higher

Connect the z33 battery current sensor connector to the hybrid battery junction block assembly.
Install the battery smart unit Click here.
Install the battery cover.
Connect the cable to the negative (-) battery terminal.

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK BATTERY SMART UNIT (VIB VOLTAGE)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Disconnect the cable from the negative (-) battery terminal.
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.
Remove the battery cover Click here.
Remove the battery smart unit

Tech Tips

Do not disconnect the battery smart unit connector.
Connect the cable to the negative (-) battery terminal.
Turn the power switch on (IG).

Text in Illustration
*1	Component with harness connected (Battery Smart Unit)

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
z29-10 (VIB) - z29-20 (GIB)	Power switch on (IG)	4.6 to 5.4V

Tech Tips

Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC (P0A0D-350) to be set. Use the intelligent tester to clear the DTCs Click here.

Turn the power switch off.
Disconnect the cable from the negative (-) battery terminal.
Install the battery smart unit Click here.
Install the battery cover.
Connect the cable to the negative (-) battery terminal.

REPLACE BATTERY SMART UNIT Click here

CHECK BATTERY SMART UNIT

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Disconnect the cable from the negative (-) battery terminal.
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.
Remove the battery cover Click here.
Remove the battery smart unit

Tech Tips

Do not disconnect the battery smart unit connector.
Connect the cable to the negative (-) battery terminal.
Turn the power switch on (IG).

Text in Illustration
*1	Component with harness connected (Battery Smart Unit)

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
z29-9 (IB) - z29-20 (GIB)	Power switch on (IG)	2.46 to 2.54 V

Tech Tips

Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC (P0A0D-350) to be set. Use the intelligent tester to clear the DTCs Click here.

Turn the power switch off.
Disconnect the cable from the negative (-) battery terminal.
Install the battery smart unit Click here.
Install the battery cover.
Connect the cable to the negative (-) battery terminal.

REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY Click here

REPLACE BATTERY SMART UNIT Click here