HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P1C9F11,P1C9F15; Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Ground; 2020 - 2022 MY Corolla Corolla HV [01/2019

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001GCN6
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): P1C9F11,P1C9F15; Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Ground; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

DTC

P1C9F11

Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Ground

DTC

P1C9F15

Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Auxiliary Battery or Open

DESCRIPTION

Refer to the description for DTC P0ABF11.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P1C9F11

Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Ground

Value of "Hybrid/EV Battery Current for Driving Control" (IBA) is excessively low.

(1 trip detection logic)

Battery voltage sensor

Comes on

Master Warning: Comes on

P1C9F15

Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Auxiliary Battery or Open

Value of "Hybrid/EV Battery Current for Driving Control" (IBA) is excessively high.

(1 trip detection logic)

Battery voltage sensor

Comes on

Master Warning: Comes on

IB0 is used for battery control and IBA is used for driving control. Although IB0 and IBA receive voltage output by the battery current sensor through the same terminal, their output may differ as they are connected through separate filter circuits within the battery voltage sensor.

Related Data List

DTC No.	Data List
P1C9F11	Hybrid/EV Battery Current for Hybrid/EV Battery Control Hybrid/EV Battery Current for Driving Control
P1C9F15

MONITOR DESCRIPTION

If the value of Data List item Hybrid/EV Battery Current for Driving Control (IBA) is abnormal, the hybrid vehicle control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P1CA1 (INF P1C9F11): Hybrid/EV battery pack current sensor circuit malfunction (+B short) P1CA2 (INF P1C9F15): Hybrid/EV battery pack current sensor circuit malfunction (GND short)
Required sensors/components	Battery current sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately
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 P1CA1 (INF P1C9F11) is not detected

DTC P1CA2 (INF P1C9F15) 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.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

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.
With power switch on (IG) and wait for 10 seconds or more.[*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
P0AFC00, P0AFC96, P308A12, P0ABF11, P0ABF15, P0ABF28 or P0ABF2A is not output.	A
P0AFC00, P0AFC96, P308A12, P0ABF11, P0ABF15, P0ABF28 or P0ABF2A is output.	B

(e) Turn the power switch off.

REPLACE BATTERY VOLTAGE SENSOR

GO TO DTC CHART (HYBRID CONTROL SYSTEM)