Malfunction in Deceleration Sensor - Vehicle Stability Control System (for BOSCH Made)

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for BOSCH Made): C0365/28,C1234/34: Malfunction in Deceleration Sensor
C1234/34 - Yaw Rate Sensor Malfunction

DESCRIPTION

The deceleration sensor is combined with the yaw rate and acceleration sensor.

The brake actuator receives signals from the yaw rate and acceleration sensor via the CAN communication system.

If there is trouble in the CAN communication system, DTCs U0073/94 and U0123/62 are output.





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
* Check the condition of each related circuit connector before troubleshooting Electronic Circuit Inspection Procedure.
* When U0073/94, U0100/65, U0123/62 and/or U0126/63 is output together with C0365/28, inspect and repair the trouble areas indicated by U0073/94, U0100/65, U0123/62 and/or U0126/63 first.

PROCEDURE

1. CHECK DTC

(a) Clear the DTCs Vehicle Stability Control System (for BOSCH Made).

(b) Start the engine.

(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) the vehicle.

(d) Turn the ignition switch on (IG) again and check that no CAN communication system DTC is output Vehicle Stability Control System (for BOSCH Made).

Result:





B -- INSPECT CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

2. INSPECT YAW RATE AND ACCELERATION SENSOR INSTALLATION

(a) 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 titled.

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 on (IG).

(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:





(c) Connect the connector.

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

5. RECONFIRM DTC

(a) Clear the DTCs Vehicle Stability Control System (for BOSCH Made).

(b) Start the engine.

(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) the vehicle.

(d) Turn the ignition switch on (IG) again and check that no CAN communication system DTC is output Vehicle Stability Control System (for BOSCH Made).

HINT
Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

Result:





C -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Diagnosis System

B -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

A -- REPLACE YAW RATE AND ACCELERATION SENSOR Removal