Toyota Tacoma manuals

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

DESCRIPTION

The skid control ECU (master cylinder solenoid) receives signals from the yaw rate and acceleration (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'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, DTCs U0123 (yaw rate sensor communication trouble) and U0124 (acceleration sensor communication trouble) are stored.

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

DTC Code

DTC Detection Condition

Trouble Area

C1210

Zero point calibration of the yaw rate sensor is incomplete.

  • Zero point calibration incomplete
  • Sensor installation
  • Yaw rate and acceleration sensor (airbag sensor assembly)
  • Skid control ECU (master cylinder solenoid)

C1336

Zero point calibration of the acceleration sensor is incomplete.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the skid control ECU (master cylinder solenoid), perform calibration (See page ). When replacing the yaw rate and acceleration sensor (airbag sensor assembly), ).
  • When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform zero point calibration (See page ) Inspect the fuses for circuits related to this system before performing )
  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check for DTCs (See page ). Result ).

Result

Result

Proceed to

CAN DTC is not output

A

CAN DTC is output

B

B

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

A

2.

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

3.

PERFORM TEST MODE (SIGNAL CHECK)

(a) Turn the ignition switch off.

(b) Perform the signal check in the Test Mode Procedure (See page OK: OK: ).

OK:

All test mode DTCs are cleared.

OK

END

NG

4.

CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION

(a) Turn the ignition switch off.

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

OK:

The sensor is tightened to the specified torque.

The sensor is not installed at an angle.

NG

INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY

OK

5.

READ VALUE USING TECHSTREAM (YAW RATE AND ACCELERATION SENSOR)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

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

ABS/VSC/TRAC

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Deceleration Sensor

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

-

Changes continuously during acceleration/deceleration.

Deceleration Sensor2

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

-

Changes continuously during acceleration/deceleration.

Yaw Rate Sensor

Yaw rate sensor/ Min.: -128°/s, Max.: 127°/s

0°/s: Vehicle stationary

-128 to 0°/s: Right turn

0 to 127°/s: Left turn

-

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

OK:

The yaw rate and acceleration sensor output value is normal.

NOTICE:

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

OK

REPLACE MASTER CYLINDER SOLENOID

NG

REPLACE AIRBAG SENSOR ASSEMBLY

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Other materials:

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