Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001AZ89
Model Year Start: 2019 Model: Avalon Prod Date Range: [04/2018 - 08/2021]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model): C1381; Abnormal Power Supply Voltage in Yaw Rate and/or Deceleration Sensor; 2019 - 2021 MY Avalon [04/2018 - 08/2021]

DTC

C1381

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

DESCRIPTION

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).

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1381

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

Vehicle speed is 6 km/h (4 mph) or higher and yaw rate and acceleration sensor power supply malfunction signal is received for 1.1 seconds or more.
  • Acceleration sensor power source circuit
  • Acceleration sensor (airbag sensor assembly)

WIRING DIAGRAM

Refer to DTCs C1234, C1472 and C1474.

Click here 2019 - 2021 MY Avalon [04/2018 - 08/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model): C1234,C1472,C1474; Yaw Rate Sensor

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • After replacing or reinstalling the yaw rate and acceleration sensor (airbag sensor assembly), perform system variant learning and acceleration sensor zero point calibration.

    Click here 2019 - 2021 MY Avalon [04/2018 - 08/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model): CALIBRATION

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

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

OK:

The connector is securely connected.

*a

Front view of wire harness connector

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

(b) Disconnect the G50 yaw rate and acceleration sensor (airbag sensor assembly) connector.

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

OK:

No deformation or corrosion.

(d) Turn the engine switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G50-36 (IG2) - Body ground

Engine switch on (IG)

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
OK

2.

CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

(a) Turn the engine switch off.

*a

Front view of wire harness connector (to Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly))

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G50-33 (E1) - Body ground

Always

Below 1 Ω

G50-32 (E2) - Body ground

Always

Below 1 Ω
OK

REPLACE AIRBAG SENSOR ASSEMBLY 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2021 MY Avalon Avalon HV [08/2020 - 08/2021]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)