HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): P0BCC11,P0BCC15; Generator Inverter Temperature Sensor Circuit Short to Ground; 2023 - 2025 MY Corolla HV [09/2022

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM1000000026PXB
Model Year Start: 2023	Model: Corolla HV	Prod Date Range: [09/2022 - ]
Title: HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): P0BCC11,P0BCC15; Generator Inverter Temperature Sensor Circuit Short to Ground; 2023 - 2025 MY Corolla HV [09/2022 - ]

DTC

P0BCC11

Generator Inverter Temperature Sensor Circuit Short to Ground

DTC

P0BCC15

Generator Inverter Temperature Sensor Circuit Short to Battery or Open

DESCRIPTION

The motor generator control ECU (MG ECU), which is built into the inverter with converter assembly, detects the temperature of the generator inverter using the generator inverter temperature sensor. The inverter cooling system operates independently of the engine cooling system. The motor generator control ECU (MG ECU) uses signals from the generator inverter temperature sensor to check the effectiveness of the inverter cooling system. If necessary, the motor generator control ECU (MG ECU) will limit inverter output to help prevent inverter overheating. The motor generator control ECU (MG ECU) also detects malfunctions in the generator inverter temperature sensor and its wiring.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P0BCC11

Generator Inverter Temperature Sensor Circuit Short to Ground

Short to ground detected in generator inverter temperature sensor circuit

(1 trip detection logic)

Inverter with converter assembly

Comes on

Master Warning:

Comes on

SAE Code:

P0BCE

P0BCC15

Generator Inverter Temperature Sensor Circuit Short to Battery or Open

Open or short to +B detected in generator inverter temperature sensor circuit

(1 trip detection logic)

Inverter with converter assembly

Comes on

Master Warning:

Comes on

SAE Code:

P0BCF

MONITOR DESCRIPTION

If the motor generator control ECU detects a malfunction in the generator inverter temperature sensor circuit, the motor generator control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P0BCE (INF P0BCC11): Generator Inverter Temperature Sensor Range check P0BCF (INF P0BCC15): Generator Inverter Temperature Sensor Range check
Required sensors/components	Inverter, boost converter
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

Motor generator control ECU

DTC P0BCE (INF P0BCC11) is not detected

DTC P0BCF (INF P0BCC15) 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

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 wait for 5 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 / Motor Generator / 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.	REPLACE INVERTER WITH CONVERTER ASSEMBLY

Click here

COMPLETED