Yaw Rate Sensor (Test Mode DTC) - Vehicle Stability Control System
BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1232/32,C0371/71,C1234/34,C1243/43-C1245/45,C1279/79,C1381/97: Stuck in Acceleration Sensor
DTC C1232/32 - Stuck in Acceleration Sensor
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 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 U0123/62 (malfunction in CAN communication with the yaw rate sensor) and U0124/95 (malfunction in CAN communication with the acceleration sensor) are set.
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
NOTE: When replacing the yaw rate and acceleration sensor, perform zero point calibration Programming and Relearning.
HINT: When U0123/62, U0124/95 and/or U0126/63 is output together with C1232/32, C1234/34, C1243/43, C1244/44, C1245/45, and/or C1381/97, inspect and repair the trouble areas indicated by U0123/62, U0124/95 and/or U0126/63 first DTC 94.
PROCEDURE
1. CHECK FOR DTC
(a) Clear the DTCs Vehicle Stability Control System.
(b) Turn the ignition switch off.
(c) Drive the vehicle at a speed of 30 km/h (19 mph) or more, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle.
(d) Turn the ignition switch to ON again and check that no CAN communication system DTCs are output Diagnosis System.
(e) Check if DTC C1210/36 (zero point calibration of yaw rate sensor undone) or C1336/39 (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 ignition switch off.
(b) Check that the yaw rate and acceleration sensor has been installed properly Installation.
OK:
The sensor should be tightened to the specified torque.
The sensor should not be installed in a tilted position.
NG -- INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY
OK -- Continue to next step.
3. INSPECT YAW RATE AND ACCELERATION SENSOR (IG TERMINAL)
(a) Disconnect the yaw rate and acceleration sensor connector.
(b) Turn the ignition switch to ON.
(c) 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 ignition switch off.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NOTE: 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