Dtc C1436 Yaw Rate Sensor Malfunction

Brake. Yaris. Ncp93, 131
Brake Control Dynamic Control Systems. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM (YAW RATE SENSOR)

CHECK YAW RATE AND DECELERATION SENSOR (AIRBAG SENSOR ASSEMBLY) INSTALLATION

DTC C1436 Yaw Rate Sensor Malfunction


DESCRIPTION

The skid control ECU (brake actuator assembly) receives signals from the yaw rate and deceleration sensor (airbag sensor assembly) via the CAN communication system.
The yaw rate and deceleration sensor (airbag sensor assembly) has a built-in deceleration 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 deceleration sensor (airbag sensor assembly) and the CAN communication system, the DTC U0124 (Lost Communication with Lateral Acceleration Sensor Module) is output.
These DTCs are also output when calibration has not been completed.

DTC No.
DTC Detection Condition
Trouble Area
C1436
Either of the following is detected:
  1. With the vehicle stationary, the yaw rate and deceleration sensor output value is not 0 deg/s.
  2. Abnormal comparison value.
Yaw rate and deceleration sensor (Airbag sensor assembly)

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 (YARIS_NCP93 RM000001RFV0BJX.html).

INSPECTION PROCEDURE

NOTICE:
  1. When replacing the brake actuator assembly, perform zero point calibration (YARIS_NCP93 RM000000XHR078X.html).
  2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
When U0124 and/or U0126 is output together with C1436, inspect and repair the trouble areas indicated by U0124 and/or U0126 first (YARIS_NCP93 RM000000YUO0EPX.html).
1.READ VALUE USING TECHSTREAM (YAW RATE SENSOR)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.

  1. According to the display on the Techstream, read the Data List.

    ABS/VSC/TRAC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Yaw Rate Sensor
    		Yaw rate sensor/min.: -128°/s, max.: 127°/s
    		0°/s: Vehicle stationary
    -128 to 0°/s: Turning right
    0 to 127°/s: Turning left
    		-

  1. Check that the yaw rate and deceleration sensor (airbag sensor assembly) output value displayed on the Techstream.

    Result
    Result
    		Proceed to
    NG (The yaw rate and deceleration sensor (airbag sensor assembly) output value is 0°/s when the vehicle is stationary, but the value fluctuates when turning)
    		A
    NG (The yaw rate and deceleration sensor (airbag sensor assembly) output value is not 0°/s when the vehicle is stationary)
    		B
    OK
    		C

    NOTICE:
    Check the yaw rate and deceleration sensor (airbag sensor assembly) signal after replacement (YARIS_NCP93 RM000000XHT098X.html).
    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (YARIS_NCP93 RM000000XHN0BRX.html).


B
REPLACE YAW RATE AND DECELERATION SENSOR (AIRBAG SENSOR ASSEMBLY) (YARIS_NCP93 RM000000V6U02AX.html)

C
CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (YARIS_NCP93 RM000000XHS0ANX.html)
A


2.CHECK YAW RATE AND DECELERATION SENSOR (AIRBAG SENSOR ASSEMBLY) INSTALLATION

  1. Turn the ignition switch off.

  1. Check that the yaw rate and deceleration sensor (airbag sensor assembly) has been installed properly (YARIS_NCP93 RM000000V6S02AX.html).

    OK:
    The sensor should be tightened to the specified torque.
    The sensor should not be installed in a tilted position.
    NOTICE:
    Check the yaw rate and deceleration sensor (airbag sensor assembly) signal after replacement (YARIS_NCP93 RM000000XHT098X.html).
    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (YARIS_NCP93 RM000000XHN0BRX.html).


NG
INSTALL YAW RATE AND DECELERATION SENSOR (AIRBAG SENSOR ASSEMBLY) CORRECTLY (YARIS_NCP93 RM000000V6S02AX.html)
OK

REPLACE YAW RATE AND DECELERATION SENSOR (AIRBAG SENSOR ASSEMBLY) (YARIS_NCP93 RM000000V6U02AX.html)