HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): P1C9F11,P1C9F15; Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Ground; 2023 - 2025 MY Corolla HV [09/2022

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM1000000026PZC
Model Year Start: 2023	Model: Corolla HV	Prod Date Range: [09/2022 - ]
Title: HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): P1C9F11,P1C9F15; Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Ground; 2023 - 2025 MY Corolla HV [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.

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DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P1C9F11

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

"Hybrid/EV Battery Current for Driving Control" is excessively low (terminal IBA voltage stuck at 5 V).

(1 trip detection logic)

Battery ECU assembly

Comes on

Master Warning:

Comes on

SAE Code: P1CA1

P1C9F15

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

"Hybrid/EV Battery Current for Driving Control" is excessively high (terminal IBA voltage stuck at 0 V).

(1 trip detection logic)

Battery ECU assembly

Comes on

Master Warning:

Comes on

SAE Code: P1CA2

MONITOR DESCRIPTION

The battery ECU assembly monitors its internal circuit connected to the battery current sensor. If the battery ECU assembly detects a malfunction in this internal circuit, it 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 ECU assembly

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.
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When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Turn the ignition switch to ON and turn the GTS on.
With ignition switch ON 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 / HV Battery / 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, perform the normal judgment procedure again.

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

(a) Check for DTCs.

Powertrain > HV Battery > Trouble Codes

Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P1C9F11 or P1C9F15" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
	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
	P0ABF28	Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure
	P0ABF2A	Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

(b) Turn the ignition switch off.

REPLACE BATTERY ECU ASSEMBLY

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)