HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0ABF2A; Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range; 2020 - 2022 MY Corolla Corolla HV [01/2019

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001GCN1
Model Year Start: 2020	Model: Corolla	Prod Date Range: [01/2019 - 09/2022]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0ABF2A; Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

DTC

P0ABF2A

Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range

DESCRIPTION

Refer to the description for DTC P0ABF11.

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DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0ABF2A

Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range

The battery current sensor output is stuck even when battery voltage change.

(1 trip detection logic)

Battery voltage sensor
HV battery junction block assembly

Comes on

Master Warning: Comes on

Related Data List

DTC No.	Data List
P0ABF2A	Hybrid/EV Battery Current for Hybrid/EV Battery Control*1

HINT:

*1: The value of "Hybrid/EV Battery Current for Hybrid/EV Battery Control" usually changes by 4 A or more while the vehicle is accelerating and decelerating.

MONITOR DESCRIPTION

If the battery voltage sensor detects a malfunction in the battery current sensor, the hybrid vehicle control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P0AC0 (INF P0ABF2A): Current sensor malfunction
Required sensors/components	Battery current sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery voltage sensor

DTC P0AC0 (INF P0ABF2A) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
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When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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Connect the Techstream to the DLC3.
Turn the power switch on (IG) and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for 2 minutes or more.
Turn the power switch on (IG) and turn the Techstream on.
Drive the vehicle on urban roads for approximately 5 minutes.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

PROCEDURE

1.	CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Check and record any HV system DTCs and freeze frame data.

Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
Only DTC P0ABF2A is output or DTC P0ABF2A and DTCs other than those in the following table are output.	A
DTC P0ABF2A and any of the DTCs in the following table are output at the same time.	B

Relevant DTC
P0A9563	High Voltage Fuse Accumulated Load History
P0ABF11	Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground
P0ABF15	Hybrid/EV Battery Current Sensor "A" Circuit Short to Auxiliary Battery or Open
P0AFC00	Hybrid/EV Battery Sensor Module
P0AFC96	Hybrid/EV Battery Sensor Module Component Internal Failure
P1CBB12	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Auxiliary Battery
P1CBB14	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Ground or Open
P308A12	Hybrid/EV Battery Voltage Sensor All Circuit Short to Auxiliary Battery
P0B3B14, P0B4014, P0B4514, P0B4A14, P0B4F14, P0B5414, P0B5914, P0B5E14, P0B6314, P0B6814	Hybrid/EV Battery Voltage Sensor "A - J" Circuit Short to Ground or Open

(e) Turn the power switch off.

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

NOTICE:

Do not turn the power switch on (READY).

NOTICE:

Select "Hybrid/EV Battery Block 1 to 9 Voltage" only. (Do not select any other Data List items.)

Powertrain > Hybrid Control > Data List

Tester Display
Hybrid/EV Battery Block 1 Voltage
Hybrid/EV Battery Block 2 Voltage
Hybrid/EV Battery Block 3 Voltage
Hybrid/EV Battery Block 4 Voltage
Hybrid/EV Battery Block 5 Voltage
Hybrid/EV Battery Block 6 Voltage
Hybrid/EV Battery Block 7 Voltage
Hybrid/EV Battery Block 8 Voltage
Hybrid/EV Battery Block 9 Voltage

(d) Check the voltage of each HV battery block voltage of "Hybrid/EV Battery Block 1 to 9 Voltage" in the Data List with the power switch on (IG).

Specified Condition:

Any "Hybrid/EV Battery Block Voltage" changes by 0.3 V or more, 60 seconds after the power switch is turned on (IG). (The difference between the maximum and minimum voltage is 0.3 V or more.)

Result	Proceed to
The change in voltage of any "Hybrid/EV Battery Block Voltage" is 0.3 V or more.	A
Other than above	B

(e) Turn the power switch off.

REPLACE BATTERY VOLTAGE SENSOR

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY