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 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0ABF11,P0ABF15,P1CBB12,P1CBB14; Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground+

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 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): UTILITY

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

    Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): DIAGNOSIS SYSTEM

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG) and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the power switch off and wait for 2 minutes or more.
  5. Turn the power switch on (IG) and turn the Techstream on.
  6. 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.

  7. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  8. 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).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(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.

A

REPLACE BATTERY VOLTAGE SENSOR

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM) 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): DIAGNOSTIC TROUBLE CODE CHART 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): DIAGNOSTIC TROUBLE CODE CHART