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 Circuit Low
P0AC2-123	Hybrid Battery Pack Current Sensor Circuit High

DESCRIPTION

A battery current sensor is installed to the positive (+) cable side of the HV battery and detects current flowing from the HV battery. The battery current sensor outputs voltage, which changes between 0 and 5 V according to the detected amperage, to the IB terminal of the battery voltage sensor. The battery voltage sensor sends signals to the power management control ECU. The power management control ECU determines the charging and discharging amount of the HV battery based on the received signals and calculates the SOC of the HV battery through the accumulated amperage.

DTC No.	DTC Detection Condition	Trouble Area
P0ABF-123	Power source voltage of the battery current sensor is excessively low/high. (1 trip detection logic)	Hybrid battery junction block assembly Battery voltage sensor Harness or connector
P0AC1-123	The battery current sensor output value is excessively low. (1 trip detection logic)	Hybrid battery junction block assembly Battery voltage sensor Harness or connector
P0AC2-123	The battery current sensor output value is excessively high. (1 trip detection logic)	Hybrid battery junction block assembly Battery voltage sensor Harness or connector

Related Data List
DTC No.	Data List
P0ABF-123 P0AC1-123 P0AC2-123	Batt Pack Current Val

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 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

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

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.

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

Turn the power switch on (IG) and wait for 10 seconds or more.

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
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 HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - HYBRID BATTERY JUNCTION BLOCK ASSEMBLY)

Note

Be sure to wear insulated gloves.

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 upper hybrid battery cover sub-assembly Click here.
Disconnect the z22 battery current sensor connector from the hybrid battery junction block assembly.
Disconnect the z21 battery voltage sensor connector.

Text in Illustration
*a	Rear view of wire harness connector (to Battery Voltage Sensor)
*b	Front view of wire harness connector (to Hybrid Battery Junction Block Assembly)

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

Standard Resistance (Check for Open)

Tester Connection	Switch Condition	Specified Condition
z21-5 (IB) - z22-3 (IB)	Power switch off	Below 1 Ω
z21-12 (GIB) - z22-2 (GIB)	Power switch off	Below 1 Ω
z21-6 (VIB) - z22-1 (VIB)	Power switch off	Below 1 Ω

Standard Resistance (Check for Short)

Tester Connection	Switch Condition	Specified Condition
z21-5 (IB) or z22-3 (IB) - Body ground and other terminals	Power switch off	10 kΩ or higher
z21-12 (GIB) or z22-2 (GIB) - Body ground and other terminals	Power switch off	10 kΩ or higher
z21-6 (VIB) or z22-1 (VIB) - Body ground and other terminals	Power switch off	10 kΩ or higher

Note

When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

Tech Tips

Because the battery harness is not available as a supply part, if the harness cannot be repaired, replace the HV battery.

Reconnect the z21 battery voltage sensor connector.
Reconnect the z22 battery current sensor connector to the hybrid battery junction block assembly.
Install the upper hybrid battery cover sub-assembly.

REPLACE HARNESS OR CONNECTOR (BATTERY CURRENT SENSOR)

CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE)

Note

Be sure to wear insulated gloves.

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 upper hybrid battery cover sub-assembly Click here.
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the power switch on (IG).

Text in Illustration
*a	Component with harness connected (Battery Voltage Sensor)

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
z21-6 (VIB) - z21-12 (GIB)	Power switch on (IG)	4.6 to 5.4 V

Note

Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Install the upper hybrid battery cover sub-assembly.

REPLACE BATTERY VOLTAGE SENSOR Click here

CHECK BATTERY VOLTAGE SENSOR (BATTERY CURRENT SENSOR OUTPUT VOLTAGE)

CAUTION:

Be sure to wear insulated gloves.

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 upper hybrid battery cover sub-assembly. Click here.
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the power switch on (IG).

Text in Illustration
*a	Component with harness connected (Battery Voltage Sensor)

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
z21-5 (IB) - z21-12 (GIB)	Power switch on (IG)	2.46 to 2.54 V

Note

Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Install the upper hybrid battery cover sub-assembly.

REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY Click here

REPLACE BATTERY VOLTAGE SENSOR Click here