Open or Short in Deceleration Sensor Circuit - Vehicle Stability Control System (for Hydraulic Brake Booster)

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster): C1232/32,C1234/34,C1243/43-C1245/45,C1381/97: Stuck in Deceleration Sensor
C1381/97 - Acceleration Sensor Power Supply Voltage Malfunction

DESCRIPTION

The skid control ECU receives signals from the yaw rate sensor and deceleration sensor via CAN communication system.

The deceleration sensor is built into the yaw rate sensor.

If there is trouble in the bus lines between the yaw rate sensor and deceleration sensor and the CAN communication system, DTC U0123/62 (yaw rate sensor communication trouble) and U0124/95 (G sensor communication trouble) are output.





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
When U0073/94, U0123/62, U0124/95 or U0126/63 are output together with C1232/32 or C1234/34, inspect and repair the trouble areas indicated by U0073/94, U0123/62, U0124/95 or U0126/63 first.

PROCEDURE

1. CHECK DTC

(a) Clear the DTCs Vehicle Stability Control System (for Hydraulic Brake Booster).

(b) Check if the DTCs U073/94, U0123/62, C1210/36 and/or C1336/39 are detected.





C -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

B -- REPAIR CAN COMMUNICATION SYSTEM
A -- Continue to next step.

2. INSPECT YAW RATE AND DECELERATION SENSOR (TERMINAL VOLTAGE AND CONTINUITY)

(a) Disconnect the yaw rate and deceleration sensor connector.

(b) Measure the voltage.

Standard Voltage:





(c) Measure the resistance.

Standard Resistance:





(d) Reconnect the yaw rate and deceleration sensor connector.





C -- REPAIR OR REPLACE HARNESS OR CONNECTOR

B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

A -- REPLACE YAW RATE AND DECELERATION SENSOR