Toyota Tundra Service Manual: Acceleration Sensor Stuck Malfunction (C1243)

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's condition using 2 circuits (GL1, GL2).

If there is trouble in the bus lines between the yaw rate and acceleration sensor (airbag sensor assembly) and the CAN communication system, the DTC U0123 (Lost Communication with Yaw Rate Sensor Module) is output.

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

CAUTION / NOTICE / HINT

NOTICE:

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

Click here

HINT:

When U0073, U0123 and/or U0126 is output together with C1243, inspect and repair the trouble areas indicated by U0073, U0123 and/or U0126 first.

Click here

PROCEDURE

(a) Check if the brake actuator assembly had been replaced before the DTC was recorded.

B

GO TO STEP 3

A

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

for Column Shift Type: Click here

for Floor Shift Type: Click here

OK:

The airbag sensor assembly is tightened to the specified torque.

The airbag sensor assembly is not installed in a tilted position.

OK

REPLACE AIRBAG SENSOR ASSEMBLY

NG

INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY

(a) Perform acceleration sensor zero point calibration.

Click here

NEXT

(a) Clear the DTC.

Click here

(b) Check if the same DTC is recorded.

Click here

A

END

B

REPLACE BRAKE ACTUATOR ASSEMBLY