HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P1C9F1C; Hybrid/EV Battery Current Sensor for Driving Control Voltage Out of Range; 2020 - 2022 MY Corolla Corolla HV [01/2019

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001GCN7
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): P1C9F1C; Hybrid/EV Battery Current Sensor for Driving Control Voltage Out of Range; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

DTC

P1C9F1C

Hybrid/EV Battery Current Sensor for Driving Control Voltage Out of Range

DESCRIPTION

Refer to the description for DTC P0ABF11.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P1C9F1C

Hybrid/EV Battery Current Sensor for Driving Control Voltage Out of Range

The difference between IBA and IB0 exceeds the threshold.

(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
P1C9F1C	Hybrid/EV Battery Current for Hybrid/EV Battery Control Hybrid/EV Battery Current for Driving Control

MONITOR DESCRIPTION

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

MONITOR STRATEGY

Related DTCs	P1CA0 (INF P1C9F1C): Current sensor malfunction
Required sensors/components	Battery voltage 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 P1CA0 (INF P1C9F1C) 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, P1CBB12, P1CBB14, P0ABF15, P0ABF28 or P0ABF2A is not output.	A
P0AFC00, P0AFC96, P308A12, P1CBB12, P1CBB14, P0ABF15, P0ABF28 or P0ABF2A is output.	B

(e) Turn the power switch off.

REPLACE BATTERY VOLTAGE SENSOR

GO TO DTC CHART (HYBRID CONTROL SYSTEM)