Open or Short In Deceleration Sensor Circuit - Vehicle Stability Control System

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

DTC C1232/32 - Stuck in Deceleration Sensor

DTC C1234/34 - Yaw Rate Sensor Malfunction

DTC C1243/43 - Acceleration Sensor Stuck Malfunction

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

DTC C1245/45 - Acceleration Sensor Output Malfunction

DTC C1381/97 - Acceleration Sensor Power Supply Voltage Malfunction

DESCRIPTION

The skid control ECU receives signals from the yaw rate 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 DTCs U0123/62 (yaw rate sensor communication trouble) and U0124/95 (acceleration sensor communication trouble) are output.
These DTCs are also output when calibration has not been completed.

WIRING DIAGRAM

INSPECTION PROCEDURE

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

PROCEDURE

1. CHECK DTC
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Turn the ignition switch off.
(c) Turn the ignition switch to ON.
(d) Check if the DTCs U0073/94, U0123/62, C1210/36 and/or C1336/39 are detected Reading and Clearing Diagnostic Trouble Codes.
Result:

C -- REPAIR CIRCUIT INDICATED BY OUTPUT DTC
B -- INSPECT CAN COMMUNICATION SYSTEM
A -- Continue to next step.

2. INSPECT YAW RATE AND ACCELERATION SENSOR (IG AND GND TERMINAL)

(a) Disconnect the yaw rate sensor connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IG OR GND CIRCUIT)
OK -- REPLACE YAW RATE AND ACCELERATION SENSOR