Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Zero Point Calibration of Yaw Rate Sensor Undone (C1210,C1336)

DESCRIPTION

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

The airbag sensor assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition. 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 U0124 (Lost Communication with Lateral Acceleration Sensor Module) is output.

The DTCs are also output when the calibration has not been completed.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1210

Zero Point Calibration of Yaw Rate Sensor Undone

Zero point calibration of yaw rate sensor undone.

  • Sensor installation
  • Yaw rate sensor (Airbag sensor assembly)
  • Skid control ECU (Brake actuator assembly)

C1336

Zero Point Calibration of Acceleration Sensor Undone

Zero Point Calibration of Acceleration Sensor Undone.

  • Sensor installation
  • Yaw rate sensor (Airbag sensor assembly)
  • Skid control ECU (Brake actuator assembly)

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information (See page ).
  • When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform zero point calibration and store system information (See page ).

HINT:

When U0124 and/or U0126 is output along with C1210 and/or C1336, inspect and repair trouble areas indicated by U0124 and/or U0126 first (See page PROCEDURE ).

PROCEDURE

1.

PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR

(a) Perform zero point calibration of the yaw rate and acceleration sensor (See page ).

NEXT

2.

PERFORM TEST MODE (SIGNAL CHECK)

(a) Turn the ignition switch off.

(b) Using the Techstream, perform a Test Mode (signal check) inspection sensor check and check that all Test Mode (signal check) inspection items change from incomplete to complete (See page ). OK: ).

OK:

All Test Mode (signal check) inspection items change from incomplete to complete

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step (See page ).

OK

END

NG

3.

CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION

(a) Turn the ignition switch off.

(b) Check that the airbag sensor assembly has been installed properly (See page OK: OK: ).

OK:

The sensor should be tightened to the specified torque.

The sensor is not installed in a tilted position.

NG

INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY

OK

4.

READ VALUE USING TECHSTREAM (YAW RATE AND ACCELERATION SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.

(e) According to the display on the Techstream, read the Data List.

ABS/VSC/TRAC

Tester Display

Measurement Item

Normal Condition

Diagnostic Note

Deceleration Sensor

Deceleration sensor reading/ Min.: - 18.525 m/s2, Max.: 18.387 m/s2

-

During deceleration/ acceleration: Changes continuously

Deceleration Sensor2

Deceleration sensor 2 reading/ Min.: -18.525 m/s2, Max.: 18.387 m/s2

-

During deceleration/ acceleration: Changes continuously

Yaw Rate Sensor

Yaw rate and deceleration sensor1/ Min.: -128°/s, Max.: 127°/s

Vehicle stopped: 0°/s

Turning right: -128 to 0°/s

Turning left: 0 to 127°/s

-

(f) Check the yaw rate and acceleration sensor (airbag sensor assembly) output value displayed on the Techstream.

OK:

The yaw rate and acceleration sensor (airbag sensor assembly) output value is normal.

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPLACE AIRBAG SENSOR ASSEMBLY

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