Acceleration Sensor Stuck Malfunction - Electronically Controlled Brake System

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1210/36: Zero Point Calibration of Yaw Rate Sensor Undone

DTC C1210/36 - Zero Point Calibration of Yaw Rate Sensor Undone

DTC C0371/71 - Yaw Rate Sensor (Test Mode DTC)

DTC C1232/32 - Stuck in Acceleration Sensor

DTC C1234/34 - Yaw Rate Sensor Malfunction

DTC C1243/43 - Acceleration Sensor Stuck Malfunction

DTC C1244/44 - Open or Short in Acceleration Sensor Circuit

DTC C1245/45 - Acceleration Sensor Output Malfunction

DTC C1279/79 - Acceleration Sensor Output Voltage Malfunction (Test Mode DTC)

DTC C1336/39 - Zero Point Calibration of Acceleration Sensor Undone

DTC C1381/97 - Acceleration Sensor Power Supply Voltage Malfunction

DESCRIPTION

The yaw rate (deceleration) sensor detects any gravity applied to the vehicle and transmit the signal to the skid control ECU via CAN communication system (vehicle equipped with Enhanced VSC). The deceleration sensor is built into the yaw rate sensor and detects the vehicle condition in the 2 systems (GL1, GL2).
When a malfunction occurs in the communication line with the yaw rate sensor, DTC U0123/62 (yaw rate sensor communication malfunction) and DTC U0124/95 (deceleration sensor communication malfunction) are output.
DTCs C0371/71 and C1279/79 are deleted when the yaw rate and deceleration sensor sends a yaw rate and/or deceleration signal or Test Mode ends. DTCs C0371/71 and C1279/79 are output only in Test Mode.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Turn the power switch ON (READY).
(c) Check that the trouble code for CAN communication DTCs U0073/94 and U0123/62 are not output.

Result





C -- PERFORM ZERO POINT CALIBRATION OF YAW RATE SENSOR AND DECELERATION SENSOR
B -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE
A -- Continue to next step.

2. CHECK SENSOR INSTALLATION (YAW RATE (DECELERATION) SENSOR)
(a) Check that the yaw rate (deceleration) sensor has been installed properly.
OK:
The sensor should be tightened to the specified torque.
The sensor should not be tilted.
NG -- INSTALL YAW RATE SENSOR CORRECTLY
OK -- Continue to next step.

3. CHECK WIRE HARNESS (YAW RATE SENSOR - BATTERY)




(a) Disconnect the Y1 sensor connector.
(b) Turn the power switch ON (READY).
(c) Measure the voltage of the wire harness side connector.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

4. CHECK WIRE HARNESS (YAW RATE SENSOR - BODY GROUND)




(a) Disconnect the Y1 sensor connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE YAW RATE SENSOR
5. PERFORM ZERO POINT CALIBRATION OF YAW RATE SENSOR AND DECELERATION SENSOR
(a) Perform the zero point calibration of the yaw rate (deceleration) sensor Calibration.
NEXT -- Continue to next step.

6. RECONFIRM DTC
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Turn the power switch ON (READY).
(c) Check the same DTCs are recorded Reading and Clearing Diagnostic Trouble Codes.

Result





HINT: This DTC may be memorized due to a malfunction in the connector terminal.

B -- REPLACE YAW RATE SENSOR
A -- END