Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001EAD3
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 02/2019]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C1381; Abnormal Power Supply Voltage in Yaw Rate and/or Deceleration Sensor; 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]

DTC

C1381

Abnormal Power Supply Voltage in Yaw Rate and/or Deceleration Sensor

DESCRIPTION

This DTC is stored when the skid control ECU (brake booster with master cylinder assembly) receives a sensor supply voltage malfunction signal from the yaw rate and acceleration sensor (airbag ECU assembly). This DTC may also be stored due to a temporary power source voltage drop.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1381

Abnormal Power Supply Voltage in Yaw Rate and/or Deceleration Sensor

601

When the IG1 terminal voltage exceeds 9.5 V and the vehicle speed exceeds 3 km/h, a power supply voltage malfunction signal is received from the yaw rate sensor continuously for 10 seconds or more.
  • Acceleration sensor (airbag ECU assembly) supply voltage shut down
  • Acceleration sensor (airbag ECU assembly)

-

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (IG2 TERMINAL)

NOTICE:

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the auxiliary battery terminal notice before proceeding with work.

    Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

  • When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

    Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

(a) Turn the power switch off.

(b) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

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

*a

Front view of wire harness connector

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

(d) Disconnect the G70 yaw rate and acceleration sensor (airbag ECU assembly) connector.

(e) Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

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

(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

Switch Condition

Specified Condition

G70-36 (IG2) - Body ground

Power switch on (IG)

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 CIRCUIT)
OK

2.

CHECK HARNESS AND CONNECTOR (E TERMINAL)

(a) Turn the power switch off.

*a

Front view of wire harness connector

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G70-33 (E1) - Body ground

Always

Below 1 Ω

G70-32 (E2) - Body ground

Always

Below 1 Ω

NOTICE:

Check the yaw rate and acceleration sensor signal after replacement.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; 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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (E CIRCUIT)
OK

3.

RECONFIRM DTC

(a) Reconnect the G70 yaw rate and acceleration sensor (airbag ECU assembly) connector.

(b) Clear the DTC.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DTC CHECK / CLEAR

Chassis > ABS/VSC/TRAC > Clear DTCs

(c) Turn the power switch off.

(d) Turn the power switch on (READY).

(e) Perform a road test.

(f) Check if the same DTC is recorded.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; 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

DTC C1381 is not output

A

DTC C1381 is output

B

NOTICE:

Check the yaw rate and acceleration sensor signal after replacement.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; 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

A

USE SIMULATION METHOD TO CHECK

B

REPLACE AIRBAG ECU ASSEMBLY