Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028D7M
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 - 08/2023]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C11781C,C117828; Multi-axis Acceleration Sensor Module "A" Circuit Voltage Out of Range; 2023 MY Corolla Corolla Hatchback GR Corolla [11/2022 - 08/2023]

DTC

C11781C

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

DTC

C117828

Multi-axis Acceleration Sensor Module "A" Signal Bias Level Out of Range / Zero Adjustment Failure

DESCRIPTION

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

The skid control ECU (brake actuator assembly) receives signals from the yaw rate and acceleration sensor (airbag sensor assembly) via CAN communication.

HINT:

These DTCs may be stored if one of the following occurs:

  • Yaw rate and acceleration sensor (airbag sensor assembly) installation abnormality.
  • Yaw rate and acceleration sensor signal malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C11781C

Multi-axis Acceleration Sensor Module "A" Circuit Voltage Out of Range
  • When the vehicle is stopped, the value (lateral) of the acceleration sensor is less than -7 m/s2 or more than 7 m/s2 for 0.4 seconds or more.
  • The value (Forward and rearward G) of the acceleration sensor is less than -14.6 m/s2 or more than 14.6 m/s2 for 3 seconds or more.
  • When the vehicle is being driven and the stop light switch assembly is OFF, the value (longitudinal) of the acceleration sensor (airbag sensor assembly) is less than -4.0 m/s2 or more than 4.0 m/s2 for 20 seconds or more.
  • When the vehicle is being driven, the difference in the acceleration value (longitudinal) calculated using the speed sensors and the acceleration value of the acceleration sensor (airbag sensor assembly) is less than -3.5 m/s2 or more than 3.5 m/s2 for 4 seconds or more.
  • Acceleration sensor(airbag sensor assembly) installation
  • Acceleration sensor(airbag sensor assembly)

C117828

Multi-axis Acceleration Sensor Module "A" Signal Bias Level Out of Range / Zero Adjustment Failure
  • When the vehicle is being driven, the offset of the acceleration sensor is less than -2.25 m/s2 or more than 2.25 m/s2.
  • The value (lateral) of the acceleration sensor is less than -14.6 m/s2 or more than 14.6 m/s2 for 0.8 seconds or more.
  • Acceleration sensor(airbag sensor assembly) installation
  • Acceleration sensor(airbag sensor assembly)

PROCEDURE

1.

CHECK FREEZE FRAME DATA (LATERAL G AND FORWARD AND REARWARD G)

(a) Select a DTC to display the Freeze Frame Data.

(b) Read the freeze frame data of DTC C11781C or C117828.

Chassis > Brake/EPB

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Lateral G

Lateral G

Min.: -25.105 m/s2, Max.: 24.908 m/s2

Turning right: -25.105 to 0.000 m/s2

Turning left: 0.000 to 24.908 m/s2

During turning: Changes in proportion with lateral acceleration

Forward and Rearward G

Forward and rearward G

Min.: -25.105 m/s2, Max.: 24.908 m/s2

During deceleration: -25.105 to 0.000 m/s2

During acceleration: 0.000 to 24.908 m/s2

During acceleration/deceleration: Changes in proportion with acceleration

Chassis > Brake/EPB > DTC(C11781C) > Freeze Frame Data

Tester Display

Lateral G

Forward and Rearward G

Chassis > Brake/EPB > DTC(C117828) > Freeze Frame Data

Tester Display

Lateral G

Forward and Rearward G

Result

Proceed to

The value of Lateral G or Forward and rearward G is less than -14.6 m/s2 or more than 14.6 m/s2.

A

Other than above.

B
A

REPLACE AIRBAG SENSOR ASSEMBLY

B

2.

CHECK FREEZE FRAME DATA (LATERAL G AND VEHICLE SPEED)

(a) Select a DTC to display the Freeze Frame Data.

(b) Read the freeze frame data of DTC C11781C or C117828.

Chassis > Brake/EPB

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Lateral G

Lateral G

Min.: -25.105 m/s2, Max.: 24.908 m/s2

Turning right: -25.105 to 0.000 m/s2

Turning left: 0.000 to 24.908 m/s2

During turning: Changes in proportion with lateral acceleration

Vehicle Speed

Vehicle speed

Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph)

Vehicle stopped: 0.0 km/h (0.0 mph)

When driving at constant speed: No large fluctuations

Chassis > Brake/EPB > DTC(C11781C) > Freeze Frame Data

Tester Display

Lateral G

Vehicle Speed

Chassis > Brake/EPB > DTC(C117828) > Freeze Frame Data

Tester Display

Lateral G

Vehicle Speed

Result

Proceed to

Proceed to The value of Vehicle speed is 0 km/h (0 mph) and the value of Lateral G is less than -7 m/s2 or more than 7 m/s2, or the value of Lateral G is less than -14.6 m/s2 or more than 14.6 m/s2.

A

Other than above.

B
A

REPLACE AIRBAG SENSOR ASSEMBLY

B

3.

CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION

(a) Check that the yaw rate and acceleration sensor (airbag sensor assembly) has been installed properly.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: INSTALLATION

OK:

The yaw rate and acceleration sensor (airbag sensor assembly) is tightened to the specified torque.

The yaw rate and acceleration sensor (airbag sensor assembly) is not installed in a tilted position.

OK

REPLACE AIRBAG SENSOR ASSEMBLY

NG

INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY