HYBRID BATTERY SYSTEM, Diagnostic DTC:P0ABF-123, P0AC1-123, P0AC2-123, P0B10-123, P0B11-123

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
P0B10-123	Hybrid Battery Pack Current Sensor "B" Circuit Low
P0B11-123	Hybrid Battery Pack Current Sensor "B" Circuit High

DESCRIPTION

A battery current sensor, which is mounted on the positive cable side of each hybrid battery junction block assembly, detects the current flowing to or from the battery pack. The battery current sensor sends a voltage, which varies between 0 and 5 V in proportion to the amperage, to the IB0 terminal of the battery smart unit. Similarly, it sends a voltage, which varies between 0 and 5 V in inverse proportion to the amperage, into the IB1 terminal of the battery smart unit. When the voltage of the IB0 terminal is below 2.8 V and the voltage of the IB1 terminal is above 2.2 V, this indicates that the HV battery is being discharged. Meanwhile, when the voltage of the IB0 terminal is above 2.8 V and the voltage of the IB1 terminal is below 2.2 V, this indicates that the HV battery is being charged. The battery smart unit sends the signals from its IB0 and IB1 terminals to the power management control ECU. The power management control ECU determines the charging and discharging amperage of the HV battery based on the received signals and calculates the SOC of the HV battery using the cumulative amperage value.

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P0ABF P0AC1 P0AC2 P0B10 P0B11	123	When the battery current sensor is abnormal (1 trip detection)	Hybrid battery junction block assembly Battery smart unit Wire harness or connector HV battery

DTC No.

INF Code

DTC Detection Condition

Trouble Area

P0ABF

P0AC1

P0AC2

P0B10

P0B11

123

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

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

WIRING DIAGRAM


*a	Battery Current Sensor (Hybrid Battery Junction Block Assembly)
*b	Battery Smart Unit

Refer to the wiring diagram for DTC U0A29-123 Click here.

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.

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

If a short to +B occurs in the battery temperature sensor, battery current sensor or intake air temperature sensor, the following DTCs may be output simultaneously.

DTC No.	Relevant Diagnosis
P0ABF-123	Hybrid Battery Pack Current Sensor Circuit
P0A9E-123	Hybrid Battery Temperature Sensor "A" Circuit High
P0AC8-123	Hybrid Battery Temperature Sensor "B" Circuit High
P0ACD-123	Hybrid Battery Temperature Sensor "C" Circuit High
P0AEB-123	Hybrid Battery Temperature Sensor "D" Circuit High
P0BC5-123	Hybrid Battery Temperature Sensor "E" Circuit High
P0C36-123	Hybrid Battery Temperature Sensor "F" Circuit High
P0AAF-123	Hybrid Battery Pack Air Temperature Sensor "A" Circuit High
P0AB4-123	Hybrid Battery Pack Air Temperature Sensor "B" Circuit High

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 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 HARNESS AND CONNECTOR (B AND IGCT 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 No. 1 hybrid battery shield sub-assembly Click here.
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the power switch on (IG).

Note

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

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

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

Standard Voltage

Tester Connection	Condition	Specified Condition
L144-1 (B) - L144-4 (GND)	Power switch off	8.6 V or more
L144-5 (IGCT) - L144-4 (GND)	Power switch on (IG)	8.6 V or more

Tech Tips

As there might be an intermittent malfunction in the battery voltage sensor power source circuit, inspect the following even if the measured voltage is as specified:

Installation condition of fuse(s) (before removing fuse(s)) (IGCT circuit)
Fuse condition (before and after removing fuse(s)) (IGCT circuit)
Connection condition of connectors (IGCT circuit)
Wire harness condition (IGCT circuit)
Wire harness condition (GND circuit)

Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Install the No. 1 hybrid battery shield sub-assembly.

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY SMART UNIT POWER SOURCE CIRCUIT)

CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - 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 No. 2 hybrid battery shield sub-assembly Click here.
Disconnect the z25 hybrid battery junction block assembly connector.

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

Disconnect the z24 battery smart unit connector.

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

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
z24-11 (IB1) - z25- 2 (IB1)	Power switch off	Below 1 Ω
z24-12 (GIB) - z25- 3 (GIB)	Power switch off	Below 1 Ω
z24-23 (IB0) - z25- 4 (IB0)	Power switch off	Below 1 Ω
z24-24 (VIB) - z25- 1 (VIB)	Power switch off	Below 1 Ω

Standard Resistance (Check for Short)

Tester Connection	Condition	Specified Condition
z24-11 (IB1) or z25- 2 (IB1) - Body ground and other terminals	Power switch off	10 kΩ or higher
z24-12 (GIB) or z25- 3 (GIB) - Body ground and other terminals	Power switch off	10 kΩ or higher
z24-23 (IB0) or z25- 4 (IB0) - Body ground and other terminals	Power switch off	10 kΩ or higher
z24-24 (VIB) or z25- 1 (VIB) - Body ground and other terminals	Power switch off	10 kΩ or higher

Reconnect the z25 hybrid battery junction block assembly connector.
Reconnect the z24 battery smart unit connector.
Install the No. 2 hybrid battery shield sub-assembly.

REPAIR OR REPLACE HARNESS OR CONNECTOR OR HV BATTERY

CHECK BATTERY SMART UNIT (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 No. 1 hybrid battery shield sub-assembly Click here.
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the power switch on (IG).

Note

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

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

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

Standard Voltage

Tester Connection	Condition	Specified Condition
z24-24 (VIB) - z24-12 (GIB)	Power switch on (IG)	4.6 to 5.4 V

Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Install the No. 1 hybrid battery shield sub-assembly.

REPLACE BATTERY SMART UNIT Click here

CHECK BATTERY SMART UNIT (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 No. 1 hybrid battery shield sub-assembly Click here.
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the power switch on (IG).

Note

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

Text in Illustration
*a	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
z24-11 (IB1) - z24-12 (GIB)	Power switch on (IG)	2.16 to 2.24 V
z24-23 (IB0) - z24-12 (GIB)	Power switch on (IG)	2.76 to 2.84 V

Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Install the No. 1 hybrid battery shield sub-assembly.

REPLACE BATTERY SMART UNIT Click here

REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY Click here