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
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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) |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
CAUTION:
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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.
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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.
PROCEDURE
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CHECK DTC OUTPUT (HV)
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Connect the intelligent tester to the DLC3.
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Turn the power switch on (IG).
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Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
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Check if DTCs are output.
Result Result Proceed to P0AFC-123 is not output. A P0AFC-123 is also output. B -
Turn the power switch off.
B 
GO TO DTC CHART Click here
A 
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CHECK HARNESS AND CONNECTOR (HYBRID BATTERY JUNCTION BLOCK - BATTERY SMART UNIT)
Note
Be sure to wear insulated gloves.
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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.
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Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.
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Disconnect connector d1 from the battery smart unit.
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Disconnect connector d4 from the hybrid battery junction block.
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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)
Measure the resistance according to the value(s) in the tables below.
Standard Resistance (Check for Open) Tester Connection Switch Condition Specified Condition d1-1 (IB) - d4-3 (IB) Power switch off Below 1 Ω d1-6 (GIB) - d4-2 (GIB) Power switch off Below 1 Ω d1-5 (VIB) - d4-1 (VIB) Power switch off Below 1 Ω Standard Resistance (Check for Short) Tester Connection Switch Condition Specified Condition d1-1 (IB) or d4-3 (IB) - Body ground and other terminals Power switch off 10 kΩ or higher d1-6 (GIB) or d4-2 (GIB) - Body ground and other terminals Power switch off 10 kΩ or higher d1-5 (VIB) or d4-1 (VIB) - Body ground and other terminals Power switch off 10 kΩ or higher -
Connect the battery smart unit connector.
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Connect the hybrid battery junction block connector.
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Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
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CHECK BATTERY SMART UNIT (VIB VOLTAGE)
Note
Be sure to wear insulated gloves.
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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.
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Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.
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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 to be set. Use the intelligent tester to clear the DTCs Click here.
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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 d1-5 (VIB) - d1-6 (GIB) Power switch on (IG) 4.6 to 5.4 V -
Turn the power switch off.
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Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.
NG
REPLACE BATTERY SMART UNIT Click here
OK
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CHECK BATTERY SMART UNIT
CAUTION:
Be sure to wear insulated gloves.
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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 vehicle battery carrier bracket sub-assembly Click here.
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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 to be set. Use the intelligent tester to clear the DTCs Click here.
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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 d1-1 (IB) - d1-6 (GIB) Power switch on (IG) 2.46 to 2.54 V -
Turn the power switch off.
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Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.
NG
REPLACE HYBRID BATTERY JUNCTION BLOCK Click here
OK 
REPLACE BATTERY SMART UNIT Click here
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