C1381

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1232/32: Stuck in Deceleration Sensor

DTC C1232/32 - Stuck in Deceleration 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.
If there is trouble in the bus lines between the yaw rate and acceleration sensor and the CAN communication system, the DTC 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 the calibration has not been completed.
DTCs C1279/79 and C0371/71 are output only in the test mode (SIGNAL CHECK).





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT: When U0123/62, U124/95 or U0126/63 is output together with C1232/32, C1234/34, C1243/43, C1244/44, C1245/45, and C1381/97, inspect and repair the trouble areas indicated by U0123/62, U0124/95 or U0126/63 first.

PROCEDURE

1. CHECK DTC
(a) Clear the DTC.
(b) Turn the ignition switch off.
(c) At a speed of 18 mph (30 km/h) or more, drive the vehicle, turn the steering wheel, and decelerate (depress the brake pedal).
(d) Turn the ignition switch on (IG) again and check that no CAN communication system DTC is output.
(e) Check that no DTCs for zero point calibration of the yaw rate sensor undone (C1210/36) and for zero point calibration of the acceleration sensor undone (C1336/39) are output.
Result:





B -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE
A -- Continue to next step.

2. CHECK SENSOR INSTALLATION (YAW RATE SENSOR)
(a) 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. CHECK HARNESS AND CONNECTOR (IG TERMINAL)





(a) Disconnect the yaw rate and acceleration sensor connector.
(b) Turn the ignition switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (GND TERMINAL)





(a) Disconnect the yaw rate and acceleration sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Resistance:





NOTICE:
- When replacing the yaw rate and acceleration sensor, perform zero point calibration Programming and Relearning.
- 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