Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000014VMX
Model Year Start: 2018 Model: Camry HV Prod Date Range: [07/2017 - 09/2018]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1381; Abnormal Power Supply Voltage in Yaw Rate and/or Deceleration Sensor; 2018 MY Camry HV [07/2017 - 09/2018]

DTC

C1381

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

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 a power source malfunction signal from the yaw rate and acceleration sensor (airbag sensor assembly) is detected by the skid control ECU (brake booster with master cylinder assembly), DTC C1381 is stored.

DTC C1381 may be stored due to an intermittent low power source voltage.

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

At a vehicle speed of more than 3 km/h (2 mph), the acceleration sensor power source malfunction signal is received for 10 seconds or more.
  • Wire harness or connector
  • Acceleration sensor (airbag sensor assembly)

ABS DTC

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • 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

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

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (IG2 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 K73 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 power switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

K73-36 (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 (GND TERMINAL)

(a) Turn the power 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

K73-33 (E1) - Body ground

Always

Below 1 Ω

K73-32 (E2) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK

3.

RECONFIRM DTC

(a) Reconnect the K73 yaw rate and acceleration sensor (airbag sensor assembly) connector.

(b) Clear the DTCs.

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 output.

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTC C1381 is not output.

A

DTC C1381 is output.

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE AIRBAG SENSOR ASSEMBLY