Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028T1C
Model Year Start: 2023 Model: Corolla Prod Date Range: [11/2022 -           ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C11791C,C14D71C; Multi-axis Acceleration Sensor Module "A" Supply Voltage (2WD) Circuit Voltage Out of Range; 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]

DTC

C11791C

Multi-axis Acceleration Sensor Module "A" Supply Voltage (2WD) Circuit Voltage Out of Range

DTC

C14D71C

Multi-axis Acceleration Sensor Module "A" Supply Voltage Circuit Voltage Out of Range

DESCRIPTION

The airbag sensor assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition.

This DTC is stored when the skid control ECU (brake actuator assembly) receives a sensor supply voltage malfunction signal from the yaw rate and acceleration sensor (airbag sensor assembly).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

DTC Output from

Note

C11791C

Multi-axis Acceleration Sensor Module "A" Supply Voltage (2WD) Circuit Voltage Out of Range

Vehicle speed is 6 km/h (4 mph) or more and yaw rate and acceleration sensor power supply malfunction signal is received for 1 second or more.
  • Wire harness or connector
  • Acceleration sensor (airbag sensor assembly)

Does not come on

Brake/EPB
  • Output ECU: skid control ECU (brake actuator assembly)
  • for 2WD

C14D71C

Multi-axis Acceleration Sensor Module "A" Supply Voltage Circuit Voltage Out of Range

Vehicle speed is 6 km/h (4 mph) or more and yaw rate and acceleration sensor power supply malfunction signal is received for 1 second or more.
  • Wire harness or connector
  • Acceleration sensor (airbag sensor assembly)

Comes on

Brake/EPB
  • SAE Code: C14D7
  • Output ECU: skid control ECU (brake actuator assembly)
  • for AWD

MONITOR DESCRIPTION

When the vehicle speed is a certain value or more, the power supply voltage of the skid control ECU (brake actuator assembly) is a certain value or more, CAN communication with the yaw rate and acceleration sensor (airbag sensor assembly) is valid, and a malfunction signal is received from the yaw rate sensor (airbag sensor assembly), the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

MONITOR STRATEGY

Related DTCs

C14D7: Yaw rate and acceleration sensor supply voltage failure (AWD)

Required Sensors/Components(Main)

Skid control ECU (brake actuator assembly)

Required Sensors/Components(Related)

Skid control ECU (brake actuator assembly)

Speed sensor

Frequency of Operation

Continuous

Duration

1.1 seconds

MIL Operation

2 driving cycles

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs 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

TMC's intellectual property

-

CONFIRMATION DRIVING PATTERN

NOTICE:

When performing the normal judgment procedure, make sure that the driver door is closed and is not opened at any time during the procedure.

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.
  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off.
  5. Turn the ignition switch to ON (READY) and turn the GTS on.
  6. Wait for 2 seconds or more. [*]

    HINT:

    [*]: 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: Chassis / Brake/EPB* / Utility / All Readiness.

    *: Electric Parking Brake System

  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, perform driving pattern again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • When removing/installing a supplemental restraint systems related component, disconnect the cable from the negative (-) auxiliary battery terminal before performing the procedure.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: PRECAUTION

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

CAUTION:

Wait at least 60 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: PRECAUTION

*a

Front view of wire harness connector

(to Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly))

(b) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(c) Disconnect the I47 yaw rate and acceleration sensor (airbag sensor assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Connect the cable to the negative (-) auxiliary battery terminal.

(f) Turn the ignition switch to ON.

(g) Operate all the components of the electrical system (defogger, wipers, headlights, heater blower, etc.).

(h) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

I47-36 (IGR) - Body ground

Ignition switch ON

8 to 16 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

2.

CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

(a) Turn the ignition switch off.

(b) Disconnect the cable from the negative (-) auxiliary battery terminal.

CAUTION:

Wait at least 60 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: PRECAUTION

(c) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(d) Disconnect the I47 yaw rate and acceleration sensor (airbag sensor assembly) connector.

(e) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(f) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I47-33 (E1) - Body ground

1 minute or more after disconnecting the cable from the negative (-) auxiliary battery terminal

Below 1 Ω

I47-32 (E2) - Body ground

1 minute or more after disconnecting the cable from the negative (-) auxiliary battery terminal

Below 1 Ω
OK

REPLACE AIRBAG SENSOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR