DTC P0ABF-123: Hybrid Battery Pack Current Sensor Circuit; DTC P0AC1-123: Hybrid Battery Pack Current Sensor "A" Circuit Low; DTC P0AC2-123: Hybrid Battery Pack Current Sensor "A" Circuit High: Procedure

CHECK DTC OUTPUT (HV) See step 1
B → GO TO DIAGNOSTIC TROUBLE CODE CHART

A: Go to next step

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

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 information because this may cause a malfunction.
Disconnect only the i1 connector of the battery smart unit.

Fig 1: Identifying i1 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the i4 battery current sensor connector from the hybrid battery junction block assembly.

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

Fig 2: Identifying i4 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance (Check for Open)

Standard Resistance (Check for Short)

Tester Connection	Switch Condition	Specified Condition
i1-1 (IB) or i4-3 (IB) - Body ground and other terminals	Power switch off	10 kΩ or higher
i1-6 (GIB) or i4-2 (GIB) - Body ground and other terminals	Power switch off	10 kΩ or higher
i1-5 (VIB) or i4-1 (VIB) - Body ground and other terminals	Power switch off	10 kΩ or higher

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)

Connect the battery smart unit connector.
Connect the battery current sensor connector to the hybrid battery junction block assembly.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

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 information because this may cause a malfunction.
Turn the power switch on (IG).
NOTE:
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 Techstream to clear the DTCs. Refer to DTC CHECK / CLEAR .

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

Fig 3: Identifying i7 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
i1-5 (VIB) - i1-6 (GIB)	Power switch on (IG)	4.6 to 5.4 V

TEXT IN ILLUSTRATION

*a	Component with harness connected (Battery Smart Unit)

NG → See step 6

OK: Go to next step

CHECK BATTERY SMART UNIT

WARNING:

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 information because this may cause a malfunction.
Turn the power switch on (IG).
NOTE:
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 Techstream to clear the DTCs. Refer to DTC CHECK / CLEAR .

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

Fig 4: Identifying i7 Connector Terminals

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
i1-1 (IB) - i1-6 (GIB)	Power switch on (IG)	2.46 to 2.54 V

TEXT IN ILLUSTRATION

*a	Component with harness connected (Battery Smart Unit)

NG → See step 5

OK → See step 6