Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000014VMT
Model Year Start: 2018 Model: Camry HV Prod Date Range: [07/2017 - 09/2018]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1240; Yaw Rate Sensor discrimination; 2018 MY Camry HV [07/2017 - 09/2018]

DTC

C1240

Yaw Rate Sensor discrimination

DESCRIPTION

The airbag sensor assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition using 2 circuits (GL1, GL2).

If the identification ID of the yaw rate and acceleration sensor (airbag sensor assembly) is different to that stored in the skid control ECU (brake booster with master cylinder assembly), DTC C1240 is stored.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1240

Yaw Rate Sensor discrimination

406

The identification ID sent from the yaw rate sensor is different to that stored in the skid control ECU (brake booster with master cylinder assembly) for 1 second or more.
  • Incorrect yaw rate sensor (airbag sensor assembly) installed
  • Skid control ECU (brake booster with master cylinder assembly)

VSC DTC

CAUTION / NOTICE / HINT

NOTICE:

  • After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

    Click here 2018 MY Camry HV [07/2017 - 09/2018]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: INITIALIZATION

  • After replacing or reinstalling the yaw rate and acceleration sensor (airbag sensor assembly), perform yaw rate and acceleration sensor zero point calibration after clearing previously calibrated data.

    Click here 2018 MY Camry HV [07/2017 - 09/2018]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: CALIBRATION

PROCEDURE

1.

CHECK PART NUMBER (AIRBAG SENSOR ASSEMBLY)

(a) Check that the proper yaw rate and acceleration sensor (airbag sensor assembly) is installed.

OK:

Proper yaw rate and acceleration sensor (airbag sensor assembly) is installed.

NG

REPLACE AIRBAG SENSOR ASSEMBLY

OK

2.

RECONFIRM DTC

(a) Clear the DTCs.

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(c) Turn the power switch on (IG).

(d) Check if the same DTC is output.

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTC C1240 is output.

A

DTC C1240 is not output.

B
A

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

B

USE SIMULATION METHOD TO CHECK