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

Toyota Tacoma (2015-2018) Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Vacuum Brake Booster) / 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 ).

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 ).

END

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.

INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY

4.	READ VALUE USING TECHSTREAM (YAW RATE AND ACCELERATION SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to 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	-

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.

REPLACE BRAKE ACTUATOR ASSEMBLY

REPLACE AIRBAG SENSOR ASSEMBLY

IG Supply Voltage Low (C120B)

DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area C120B IG Supply Voltage Low Master cylinder ...

SM Solenoid Circuit (C1225,C1468,C1469,C146A,C146B)

DESCRIPTION These solenoids turn on when signals are received from the skid control ECU (brake actuator assembly) and they control the pressure acting on the wheel cylinders to control the brakin ...

Other materials:

PTC Heater Circuit
DESCRIPTION PTC HTR heater relays are closed in accordance with signals from the air conditioning amplifier assembly and power is supplied to the quick heater assembly installed on the radiator heater unit. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits rela ...

Data List / Active Test
DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals ...

Installation
INSTALLATION PROCEDURE 1. INSTALL AIR CONDITIONER PRESSURE SENSOR (a) Remove the vinyl tape from the air conditioner tube and accessory assembly and connecting part of the air conditioner pressure sensor. (b) Apply sufficiently compressor oil to a new O-ring and fitting surface of the air co ...