Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001HG8L
Model Year Start: 2019 Model: RAV4 Prod Date Range: [02/2019 - 12/2021]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C1234,C1243-C1245,C1279; Yaw Rate Sensor; 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]

DTC

C1234

Yaw Rate Sensor

DTC

C1243

Deceleration Sensor Stuck

DTC

C1244

Open or Short Circuit in Deceleration Sensor Circuit

DTC

C1245

Abnormal Output in Deceleration Sensor

DTC

C1279

Abnormal Output Voltage in Deceleration Sensor

DESCRIPTION

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

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

If there are malfunctions in the bus lines between the yaw rate and acceleration sensor (airbag ECU assembly) and the CAN communication system, DTCs U0123 (Lost Communication with Yaw Rate Sensor Module) and U0124 (Lost Communication with Lateral Acceleration Sensor Module) will be stored.

These DTCs are also output when zero point calibration has not been completed.

DTC C1279 will be cleared when the yaw rate and acceleration sensor (airbag ECU assembly) sends a yaw rate and/or acceleration signal or when Test Mode ends. DTC C1279 is output only in Test Mode.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1234

Yaw Rate Sensor

711

712

713

714

  • INF Code: 711
    • While yaw rate sensor communication is enabled, a malfunction signal is received during the sensor self-check (Sensor 1 (GL1) malfunction).
  • INF Code: 712
    • While yaw rate sensor communication is enabled, a malfunction signal is received during the sensor self-check (Sensor 2 (GL2) malfunction).
  • INF Code: 713
    • While yaw rate sensor communication is enabled, a malfunction signal is received during the sensor self-check (Zero point calibration malfunction).
  • INF Code: 714
    • While yaw rate sensor communication is enabled, a malfunction signal is received during the sensor self-check (Two-value comparison malfunction).

Yaw rate sensor (Airbag ECU assembly) internal malfunction

-

C1243

Deceleration Sensor Stuck

561

562

563

564

565

  • INF Code: 561
    • An acceleration sensor malfunction occurs 16 times or more when the vehicle speed drops from above 30 km/h (19 mph) to 0 km/h (0 mph).
  • INF Code: 562, 563, 564, 565
    • A stuck acceleration sensor value is determined.

Acceleration sensor (Airbag ECU assembly) internal stuck malfunction

-

C1244

Open or Short Circuit in Deceleration Sensor Circuit

571

A malfunction signal from the acceleration sensor is received.

  • Acceleration sensor (Airbag ECU assembly) installed improperly
  • Acceleration sensor (Airbag ECU assembly)

-

C1245

Abnormal Output in Deceleration Sensor

581

At a vehicle speed of 30 km/h (19 mph) or more, difference between longitudinal G calculated from the acceleration sensor value and that calculated from the vehicle speed exceeds 0.35 G for 60 seconds or more.

  • Acceleration sensor (Airbag ECU assembly) installed improperly
  • Acceleration sensor (Airbag ECU assembly)

-

C1279

Abnormal Output Voltage in Deceleration Sensor

-

Detected only during Test Mode.

  • Sensor installation
  • Acceleration sensor (Airbag ECU assembly)

-

CAUTION / NOTICE / HINT

NOTICE:

When replacing the yaw rate and acceleration sensor (airbag ECU assembly), perform zero point calibration.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY

HINT:

When U0123 and/or U0124 is output together with C1234, C1243, C1244, and/or C1245, inspect and repair the trouble areas indicated by U0123 and/or U0124 first.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): U0073,...,U0293; Control Module Communication Bus OFF

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DTC CHECK / CLEAR

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON (READY).

(d) Drive the vehicle at a speed of 30 km/h (19 mph) or more, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle.

(e) Turn the ignition switch to ON again and check that no CAN communication system DTCs are output.

Click here 2019 MY RAV4 HV [02/2019 - 10/2019]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2020 MY RAV4 HV [10/2019 - 06/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2020 MY RAV4 HV [06/2020 - 08/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2021 MY RAV4 HV [08/2020 - 12/2021]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

(f) Check if DTC C1210 (Zero Point Calibration of Yaw Rate Sensor Undone) or C1336 (Zero Point Calibration of Acceleration Sensor Undone) is output.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DTC CHECK / CLEAR

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTCs (C1210, C1336 and CAN communication system DTCs) are not output.

A

CAN communication system DTCs are output.

B

DTCs C1210 and/or C1336 are output.

C

B

INSPECT CAN COMMUNICATION SYSTEM

C

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DIAGNOSTIC TROUBLE CODE CHART 2020 MY RAV4 RAV4 HV [10/2019 - 06/2020]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DIAGNOSTIC TROUBLE CODE CHART 2020 MY RAV4 RAV4 HV [06/2020 - 08/2020]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DIAGNOSTIC TROUBLE CODE CHART 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DIAGNOSTIC TROUBLE CODE CHART

A

2.

CHECK AIRBAG ECU ASSEMBLY INSTALLATION

(a) Turn the ignition switch off.

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

Click here 2019 - 2020 MY RAV4 RAV4 HV [11/2018 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: INSTALLATION 2021 - 2024 MY RAV4 RAV4 HV [08/2020 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: INSTALLATION

OK:

The airbag ECU assembly is tightened to the specified torque.

The airbag ECU assembly is not tilted.

NOTICE:

Check the yaw rate and acceleration sensor (airbag ECU assembly) signal after replacement.

Click here 2019 - 2020 MY RAV4 RAV4 HV [02/2019 - 08/2020]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): TEST MODE PROCEDURE 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): TEST MODE PROCEDURE

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

Click here 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): PROBLEM SYMPTOMS TABLE

OK

REPLACE AIRBAG ECU ASSEMBLY 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL

NG

INSTALL AIRBAG ECU ASSEMBLY CORRECTLY 2019 - 2020 MY RAV4 RAV4 HV [11/2018 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: INSTALLATION 2021 - 2024 MY RAV4 RAV4 HV [08/2020 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: INSTALLATION