DTC    C1436    Yaw Rate Sensor Malfunction

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DESCRIPTION

The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system.
The yaw rate sensor has a built-in 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 and the CAN communication system, DTCs U0123 (malfunction in CAN communication with the yaw rate sensor) and U0124 (malfunction in CAN communication with the acceleration sensor) are set.
These DTCs are also output when calibration has not been completed.

DTC Code
DTC Detection Condition
Trouble Area
C1436
Either of the following is detected:
  1. With the vehicle stationary, the yaw rate and acceleration sensor output value is not 0 deg/s.
  2. Abnormal comparison value.
Yaw rate and acceleration sensor

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 (Click here).

INSPECTION PROCEDURE

NOTICE:
When replacing the yaw rate and deceleration sensor, perform the following procedures:
For the VSC system, clear and then reobtain the zero point calibration (Click here).
For the CVT system, perform "Reset Memory", "Deceleration Sensor zero Point Calibration", and "CVT Oil Pressure Calibration" (for K41A Click here, for K41B Click here).

HINT:
When U0123, U0124 and/or U0126 is output together with C1436, inspect and repair the trouble areas indicated by U0123, U0124 and/or U0126 first (Click here).

1.READ VALUE USING INTELLIGENT TESTER (YAW RATE AND ACCELERATION SENSOR)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

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

    ABS/VSC/TRC (Skid Control ECU) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Yaw Rate Sensor
    		Yaw rate sensor/min.: -100 deg/s, max.: 100 deg/s
    		Vehicle stationary: 0 deg/s
    Right turn: -100 to 0 deg/s
    Left turn: 0 to 100 deg/s
    		-

  1. Check that the yaw rate and acceleration sensor output value displayed on the intelligent tester.

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

    NOTICE:
    Check the yaw rate and acceleration sensor signal after replacement (Click here).

    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (Click here).



B
REPLACE YAW RATE AND ACCELERATION SENSOR (Click here)

C
CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (Click here)
A


2.CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

  1. Turn the ignition switch off.

  1. Check that the yaw rate and acceleration sensor has been installed properly (Click here).

    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 acceleration sensor signal after replacement (Click here).

    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (Click here).



NG
INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY (Click here)
OK

REPLACE YAW RATE AND ACCELERATION SENSOR (Click here)