Acceleration Sensor Stuck Malfunction - Vehicle Stability Control System
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C0371/71: Yaw Rate Sensor (Test Mode DTC)
DTC C0371/71 - Yaw Rate Sensor (Test Mode DTC)
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 C1381/97 - Acceleration Sensor Power Supply Voltage Malfunction
DESCRIPTION
The skid control ECU receives signals from the yaw rate and acceleration sensor through 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 U0123/62 (Lost Communication with Yaw Rate Sensor Module) and U0124/95 (Lost Communication with Lateral Acceleration Sensor Module) are output.
These DTCs are also output when calibration has not been completed.
DTCs C0371/71 and C1279/79 will be deleted when the yaw rate and acceleration sensor sends a yaw rate and/or acceleration signal or when Test Mode ends. DTCs C0371/71 and C1279/79 are output only in Test Mode.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When replacing the yaw rate and acceleration sensor, perform zero point calibration Vehicle Stability Control System.
HINT:
When U0123/62 and/or U0124/95 is output together with C1234/34, C1243/43, C1244/44, C1245/45, and/or C1381/97, inspect and repair the trouble areas indicated by U0123/62 and/or U0124/95 first Control Module Communication Bus OFF - Vehicle Stability Control System.
PROCEDURE
1. CHECK DTC
(a) Clear the DTCs Vehicle Stability Control System.
(b) Turn the engine switch off.
(c) Start the engine.
(d) Driving the vehicle at a speed of 30 km/h (18 mph) or more, turn the steering wheel, and decelerate the vehicle (depress the brake pedal).
(e) Turn the engine switch on (IG) again and check that no CAN communication system DTC is output Diagnosis System.
(f) Check if DTC C1210/36 (zero point calibration of yaw rate sensor undone) or C1336/98 (zero point calibration of acceleration sensor undone) is output Vehicle Stability Control System.
Result:
C -- REPAIR CIRCUIT INDICATED BY OUTPUT DTC
B -- INSPECT CAN COMMUNICATION SYSTEM
A -- Continue to next step.
2. CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION
(a) Turn the engine switch off.
(b) Check that the yaw rate and acceleration sensor has been installed properly Installation.
OK:
The sensor is tightened to the specified torque.
The sensor is not tilted.
NG -- INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY
OK -- Continue to next step.
3. INSPECT YAW RATE AND ACCELERATION SENSOR (IG TERMINAL)
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.
(b) Disconnect the yaw rate and acceleration sensor connector.
(c) Turn the engine switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)
OK -- Continue to next step.
4. INSPECT YAW RATE AND ACCELERATION SENSOR (GND TERMINAL)
(a) Turn the engine switch off.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NOTICE:
Check the yaw rate and acceleration sensor signal after replacement Test Mode Procedure.
HINT:
If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK -- REPLACE YAW RATE AND ACCELERATION SENSOR