Toyota Avalon Service & Repair Manual: Yaw Rate Sensor Output Value Malfunction (C1448)

DESCRIPTION

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

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

C1448

Yaw Rate Sensor Output Value Malfunction

When the vehicle speed is 20 km/h (12 mph) or more, an invalid data signal is received from the yaw rate sensor for 120 seconds or more.

Yaw rate sensor (airbag sensor assembly)

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Chassis > ABS/VSC/TRAC/EPB > Clear DTCs

(b) Turn the engine switch off.

(c) Start and idle the engine.

(d) Drive the vehicle at a speed of 20 km/h (12 mph) or more for at least 120 seconds, and then stop the engine.

(e) Check if the same DTC is output.

Chassis > ABS/VSC/TRAC/EPB > Trouble Codes

Result

Proceed to

C1448 is output

A

C1448 is not output

B

A

REPLACE AIRBAG SENSOR ASSEMBLY

B

USE SIMULATION METHOD TO CHECK

    Steering Angle Sensor Initialization Incomplete (C1439,C1445)

    Calibration

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